DIACRIN INC /DE/
10-K405, 1999-03-31
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    Form 10-K
              ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                   For the fiscal year ended December 31, 1998

                           Commission File No. 0-20139

                                  Diacrin, Inc.
             (Exact name of registrant as specified in its charter)

            Delaware                                       22-3016912
(State or other jurisdiction of                         (I.R.S. Employer
incorporation or organization)                         Identification No.)

                 Building 96 13th Street, Charlestown Navy Yard,
                   Charlestown, MA 02129 (Address of principal
                     executive offices, including zip code)

                                 (617) 242-9100
              (Registrant's telephone number, including area code)

                Securities registered pursuant to Section 12 (b)
                                  of the Act:
     Title of each class             Name of each exchange on which registered
             None                                     None

          Securities registered pursuant to Section 12 (g) of the Act:
                               Title of each class
                          Common Stock, $.01 par value
                         Common Stock Purchase Warrants

         Indicate  by check  mark  whether  the  registrant:  (1) has  filed all
reports  required to be filed by Section 13 or 15(d) of the Securities  Exchange
Act of 1934 during the preceding 12 months (or for such shorter  period that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days.
YES    X        NO        .
    -------         ------

         Indicate by check mark if disclosure of delinquent  filers  pursuant to
Item 405 of Regulation S-K is not contained  herein,  and will not be contained,
to the best of  registrant's  knowledge,  in  definitive  proxy  or  information
statements  incorporated  by  reference  in Part  III of this  Form  10-K or any
amendment to this Form 10-K. [X]

         The  approximate  aggregate  market  value of the voting  stock held by
non-affiliates of the registrant (based on the closing price of the Common Stock
on February 10, 1999) was $37,997,334.

               As of February 10, 1999,  14,355,493  shares of the  registrant's
Common Stock were outstanding.



<PAGE>


                                     PART I
         This Annual  Report on Form 10-K contains  forward-looking  statements,
including  information with respect to planned  timetables for the completion of
Phase 1 and Phase 2 clinical trials for NeuroCell(TM)-PD  and  NeuroCell(TM)-HD,
planned   timetables  for  the  initiation  of  Phase  3  clinical   trials  for
NeuroCell(TM)-PD,  planned  timetables  for the completion of an ongoing Phase 1
clinical trials for NeuroCell(TM)-FE,  Porcine Neural Cells for Stroke and Human
Hepatocytes  for Cirrhosis,  the planned  timetables and duration of any planned
future  clinical or  preclinical  trials for any of the Company's  other product
candidates,  development  funding expected to be received in connection with the
Diacrin/Genzyme  joint venture and the expected sources of porcine cells used in
the Company's products.  For this purpose,  any statements contained herein that
are not  statements  of  historical  fact may be  deemed  to be  forward-looking
statements.  Without limiting the foregoing, the words "believes," anticipates,"
"plans,"   "expects"   and  similar   expressions   are   intended  to  identify
forward-looking  statements.  There are a number of important factors that could
cause actual events or the Company's  actual results to differ  materially  from
those  indicated by such  forward-looking  statements.  These  factors  include,
without  limitation,  those set forth below under the caption  "Certain  Factors
That May Affect Future  Results"  included  under  "Management's  Discussion and
Analysis of Financial  Condition and Results of  Operations"  in Part II of this
Annual Report on Form 10-K.

Item 1.  Business

         Diacrin is developing  transplantable  cells for the treatment of human
diseases which are characterized by cell dysfunction or cell death and for which
current  therapies  are  either   inadequate  or  nonexistent.   Products  under
development   for   the   treatment   of   neurological    disorders    include:
NeuroCell(TM)-PD  for Parkinson's disease and  NeuroCell(TM)-HD for Huntington's
disease,  both of which are being  developed  in a joint  venture  with  Genzyme
Corporation  ("Genzyme"),  NeuroCell(TM)-FE  for focal epilepsy,  porcine neural
cells for stroke and  intractable  pain and  spinal  cord cells for spinal  cord
injury.  Also under  development are hepatocytes for acute liver failure and for
cirrhosis,  myoblasts  for  cardiac  disease and  retinal  epithelial  cells for
macular degeneration.

         In 1995, the United States Food and Drug Administration ("FDA") cleared
the Company to conduct the first ever  clinical  trial of  transplanted  porcine
cells in humans and the Company  initiated a Phase 1 clinical  trial to evaluate
NeuroCell(TM)-PD  for the treatment of Parkinson's  disease.  Enrollment in this
12-patient  Phase 1 clinical  trial was  completed  in 1996.  Also in 1996,  the
Company initiated a Phase 1 clinical trial to evaluate  NeuroCell(TM)-HD for the
treatment of Huntington's disease and enrollment of all 12 patients in the trial
was completed in 1997. In 1998,  the Company  initiated a Phase 1 clinical trial
to evaluate  NeuroCell(TM)-FE  for the  treatment of complex  partial  epileptic
seizures in patients  whose  disease is not  well-controlled  with drug therapy.
Based on encouraging results from the  Neurocell(TM)-PD  Phase 1 clinical trial,
the joint  venture  initiated  a Phase 2 clinical  trial in 1998.  In 1999,  the
Company  initiated Phase 1 clinical  trials to test neural cell  transplantation
for stroke and hepatocyte transplantation for cirrhosis.

         While the  feasibility of cell  transplantation  has been  demonstrated
clinically,  widespread use of cell transplantation in clinical applications has
been  hampered  by the lack of an  adequate  supply  of human  donor  cells.  To
overcome  this  constraint,  Diacrin has  pioneered the use of porcine cells for
clinical  transplantation.  The  Company  believes  that pigs will be a reliable

<PAGE>

source of a wide range of cell types suitable for  transplantation  into humans.
The Company has shown in  preclinical  studies and early  clinical  trials that,
under standard  immunosuppressive  regimens,  transplanted  porcine cells appear
capable of  addressing  the  functional  deficits  caused by cell damage or cell
death.

         In  addition,  Diacrin is  developing  a  proprietary  immunomodulation
technology which is exclusively  licensed to the Company from the  Massachusetts
General Hospital ("MGH").  This technology  involves the selective  treatment of
major  histocompatibility  complex ("MHC") class I antigens on cell  populations
prior to  transplantation  to prevent the patient's immune system from rejecting
the  transplanted  cells.  The  Company's  approach  would  obviate the need for
standard immunosuppressive regimens, which may leave the patient vulnerable to a
wide range of undesirable side effects,  including  susceptibility to infectious
agents and cancer.  Preclinical  studies in animal models,  including  primates,
have  demonstrated the ability of the Company's  immunomodulation  technology to
prevent rejection of transplanted porcine cells without compromising the ability
of the immune  system to protect the recipient in its normal  fashion.  Neurons,
hepatocytes   and  cardiac   myocytes   treated   with   Diacrin's   proprietary
immunomodulation  technology have been  successfully  transplanted  into animals
without  immunosuppression.  This  technology  is presently  being  evaluated in
Parkinson's disease, Huntington's disease and focal epilepsy patients as part of
Phase   1   clinical   trials   of   NeuroCell(TM)-PD,    NeuroCell(TM)-HD   and
NeuroCell(TM)-FE,  respectively.  Phase 1 clinical  trial  results  suggest that
NeuroCell(TM)-PD treated with the Company's  immunomodulation  technology may be
effective without the use of standard immunosuppression.

         The FDA has granted orphan drug  designation for  NeuroCell(TM)-PD  for
advanced Parkinson's disease and NeuroCell(TM)-HD for Huntington's disease. Each
received a designation  for use of the product with  Diacrin's  immunomodulation
technology  to  prevent  rejection  and  a  designation  for  use  without  this
technology.  Under  current  law, the first  developer to receive FDA  marketing
approval  for a  designated  orphan drug is  generally  entitled to a seven-year
exclusive marketing period in the United States.

         In September 1996, the Company and Genzyme formed  Diacrin/Genzyme  LLC
(the  "Joint   Venture"),   a  joint   venture  to  develop  and   commercialize
NeuroCell(TM)-PD and NeuroCell(TM)-HD (the "Joint Venture Products").  Under the
terms, and subject to certain conditions, of the joint venture agreement,  which
was effective  October 1, 1996,  Genzyme has agreed to provide 100% of the first
$10 million in funding and 75% of the  following  $40 million in funding for the
development and  commercialization  of the Joint Venture  Products.  The Company
agreed to provide the remaining 25% of the following $40 million in funding. All
costs incurred in excess of $50 million are to be shared equally between Genzyme
and the Company in accordance  with the terms of the  agreement.  Any profits of
the Joint Venture are to be shared equally by the two parties. The Joint Venture
plans that Diacrin and Genzyme will perform, on behalf of the Joint Venture, the
development  activities in connection  with the Joint Venture  Products and that
Genzyme will market and sell the Joint Venture Products on a cost  reimbursement
basis on behalf of the Joint Venture.

         In addition to NeuroCell(TM)-PD, NeuroCell(TM)-HD and NeuroCell(TM)-FE,
Diacrin has seven other products in various stages of  development:  (i) porcine
hepatocytes for acute liver failure; (ii) human hepatocytes for cirrhosis; (iii)
human myoblasts for cardiac disease;  (iv) porcine neural cells for stroke;  (v)
porcine neural cells for  intractable  pain;  (vi) porcine spinal 

<PAGE>

cord cells for
spinal cord injury and (vii) retinal epithelial cells for macular degeneration.


Diacrin's Transplantation Technology

         While the  feasibility of cell  transplantation  has been  demonstrated
clinically,  widespread use of cell transplantation in clinical applications has
been  hampered  by the lack of an  adequate  supply  of human  donor  cells.  To
overcome  this  constraint,  Diacrin has  pioneered the use of porcine cells for
clinical  transplantation  and in March 1995 received the first FDA clearance to
transplant porcine cells into humans. Each step of Diacrin's  production process
has been carefully  designed and is tightly  controlled in order to obtain cells
suitable for human  transplantation.  The Company has  developed  procedures  to
screen pigs  thoroughly  for  infectious  agents and then isolate  donor pigs in
specially-filtered rooms. In the case of NeuroCell(TM)-PD,  NeuroCell(TM)-HD and
NeuroCell(TM)-FE,  where fetal cells are required,  Diacrin  harvests  tissue of
appropriate  fetal  age and type  under  current  good  manufacturing  practices
("cGMPs"). Specific cell populations from the harvested tissue are then isolated
and prepared at either Diacrin's or the Joint Venture's facilities.  The Company
has filed patent applications to protect its proprietary donor pig qualification
and cell harvesting processes and related products.

         Diacrin's  screening   procedures  are  performed  in  accordance  with
proposed FDA  guidelines  covering  xenotransplantation.  The Company has worked
closely with the FDA to provide input in the  development  of these  guidelines.
The  implementation  of these guidelines is necessary to avoid  contamination of
transplanted  cellular products with infectious  agents. The Company is aware of
recent  scientific  publications by others which  demonstrate,  under laboratory
conditions,  that porcine endogenous retroviruses ("PERV") have the potential to
infect  human  cells.  In response to these  findings,  the FDA in October  1997
instructed  all sponsors of human  clinical  trials  involving  porcine  tissue,
including the Company,  to test for the presence of  infectious  PERV in porcine
cells  and  for  evidence  of  PERV  in  patient  blood  samples  prior  to  the
transplantation  of any  additional  patients in clinical  trials.  The Company,
together with an outside contractor, tested porcine cells and patients for PERV.
Given the  satisfactory  results of those tests,  the FDA cleared the Company to
proceed   with   its   planned   clinical   trials   in   NeuroCell(TM)-PD   and
NeuroCell(TM)-FE in December 1997. See "Management's  Discussion and Analysis of
Financial  Condition and Results of Operations - Certain Factors That May Affect
Future  Results - Reliance  on Cell  Transplantation  Technology;  No  Currently
Approved Xenotransplantation-Based Product; PERV Testing."

         Current transplantation  technology generally requires the recipient to
be immunosuppressed  in order to avoid graft rejection.  T cells, the main cells
involved in directing  the body's  immune  response,  recognize  and bind to MHC
class I antigens.  Binding of foreign MHC class I antigens triggers a cascade of
events which results in  destruction  of the engrafted  cells that display these
antigens.  Cyclosporine,  a  standard  immunosuppressive  agent,  prevents  this
rejection  process.  Using  cyclosporine,  Diacrin has demonstrated  survival of
transplanted  porcine  cells in a variety of  preclinical  animal models and has
histologically documented survival of transplanted porcine neurons in a deceased
patient who had received NeuroCell(TM)-PD.

         Diacrin  is also  developing  proprietary  immunomodulation  technology
which   involves  the   treatment  of  isolated   cell   populations   prior  to
transplantation with antibody fragments directed 

<PAGE>

against MHC class I antigens in
order to obviate the need for generalized immunosuppression using agents such as
cyclosporine.  Chronic generalized immunosuppression may result in complications
such as increased susceptibility to infectious diseases and cancer.  Preclinical
studies performed by Diacrin  scientists and academic  collaborators  have shown
that neural cells,  hepatocytes  and cardiac  myocytes that have been pretreated
using Diacrin's immunomodulation technology prior to transplantation survived in
several animal models without  immunosuppression.  Since the antibody  fragments
would not be expected to remain  permanently  bound to the engrafted  cells, the
long-term  survival of the engrafted  cells seen in these studies  suggests that
the graft recipient's immune system has "learned" to accept the graft. Thus, the
Company  believes  that  treatment  of cells with  antibody  fragments  prior to
transplantation will induce a state of graft-specific  immunological  tolerance,
which would allow continued survival of the transplanted cells.

         In connection with its Phase 1 clinical trials, six Parkinson's disease
patients,  six Huntington's  disease patients and three focal epilepsy  patients
have   been    transplanted   with   antibody    pretreated    NeuroCell(TM)-PD,
NeuroCell(TM)-HD and NeuroCell(TM)-FE, respectively, using no immunosuppression.
Preliminary indications from the Phase 1 NeuroCell(TM)-PD clinical trial suggest
that  improvement  in  Parkinson's  disease  symptoms  have occurred in patients
transplanted with pre-treated  NeuroCell(TM)-PD.  However,  the Company believes
that,  given the  severity of  advanced  Parkinson's  disease  and  Huntington's
disease,  both  NeuroCell(TM)-PD and  NeuroCell(TM)-HD  could be useful products
even if they require the use of chronic immunosuppression.

Product Development Programs

         Diacrin is focusing  its  research and  development  activities  on the
production  and  transplantation  of  cells  for use in the  treatment  of human
diseases  characterized  by cell  dysfunction  or cell  death.  The  Company  is
developing  products  to address  important  medical  needs  which  represent  a
broad-based  application  of  Diacrin's  technologies  for cell  production  and
transplantation.  The following table illustrates  Diacrin's product development
programs in cell transplantation and each product's stage of development:


<PAGE>
<TABLE>
<CAPTION>


                                       Diacrin Product Development Programs

- - ------------------------------------------------------------------------------------------------------------------------
                                                                            U.S. Targeted Patient
   Product Candidate      Disease Indication            Defect                    Population           Development Stage
<S>                       <C>                   <C>                           <C>                      <C>

- - ------------------------------------------------------------------------------------------------------------------------
NeuroCell(TM)-PD *          Parkinson's disease  Death of dopaminergic          115,000 - 155,000        Phase 2
                                                 neurons in specific
                                                 brain regions

- - ------------------------------------------------------------------------------------------------------------------------
NeuroCell(TM)-HD *          Huntington's disease Death of GABAergic              25,000                  Phase 1 accrual
                                                 neurons in specific                                         completed
                                                 brain regions

- - ------------------------------------------------------------------------------------------------------------------------
NeuroCell(TM)-FE            Focal epilepsy       Inappropriate neuronal         200,000                  Phase 1
                                                 firing

- - ------------------------------------------------------------------------------------------------------------------------
Porcine LGE cells           Stroke               Ischemic death of              160,000                  Phase 1
                                                 neurons

- - ------------------------------------------------------------------------------------------------------------------------
Porcine LGE cells           Chronic intractable  Impaired inhibitory          2,000,000                  IND Filed
                            pain                 neurotransmission

- - ------------------------------------------------------------------------------------------------------------------------
Porcine spinal cord         Spinal cord injury   Traumatic loss of              200,000                  Preclinical
cells                                            spinal cord function

- - ------------------------------------------------------------------------------------------------------------------------
Porcine hepatocytes         Acute liver failure  Hepatocyte death                45,000                  IND Approved

- - ------------------------------------------------------------------------------------------------------------------------
Human hepatocytes           Cirrhosis            Loss of liver function         1,100,000                Phase 1

- - ------------------------------------------------------------------------------------------------------------------------
Human myoblasts             Cardiac disease      Diseased or damaged            200,000                  Preclinical
                                                 myocardium

- - ------------------------------------------------------------------------------------------------------------------------
Porcine retinal             Macular degeneration Loss of central vision         1,400,000                Preclinical
epithelial cells

- - ------------------------------------------------------------------------------------------------------------------------
*  Being developed by Diacrin / Genzyme LLC.
</TABLE>

NeuroCell(TM)-PD for Parkinson's Disease

         Parkinson's  disease is a  neurodegenerative  disease that results from
the loss of  dopamine-producing  neurons  within an area of the brain called the
substantia nigra, causing the loss of coordinated muscular activity. The disease
is  generally  characterized  by  progressively  worsening  physical  conditions
including  difficulty  in  movement,  muscular  rigidity,  tremors and  postural
instability.  The majority of Parkinson's  disease  patients are first diagnosed
between  the ages of 45 and 65. In  addition  to a  decreased  quality  of life,
Parkinson's  disease may also result in premature  death.  In the United States,
there are approximately 500,000 people afflicted with Parkinson's disease. These
patients can be  classified  according to the severity of their disease by Hoehn
and Yahr staging,  from stage 1 early in the disease process to stage 5 when the
disease  has   progressed   to  result  in  the  patient   being   bedridden  or
wheelchair-bound. NeuroCell(TM)-PD will be directed to the treatment of patients
in stage 4 and stage 5, which the Company  estimates  to be between  115,000 and
155,000  patients in the United States.  With the increasing  average age of the
population,  the prevalence of Parkinson's disease is expected to increase.  The
Company  has  received  orphan  drug  designation  for   NeuroCell(TM)-PD.   See
"Government Regulation."

         Current therapies consist of administration of levodopa  ("L-dopa"),  a
precursor of 

<PAGE>

dopamine, and dopamine analogues. However, L-dopa is only effective
for a limited  period of time,  with most  patients  experiencing  a progressive
reduction in drug  efficacy over a 10 to 15 year period,  due to the  cumulative
loss of viable neurons and tolerance to L-dopa. In addition,  L-dopa therapy can
result in severe  side-effects  including  dyskinesias  and  hallucinations.  No
currently  available therapy prevents  progression of the neurological  deficits
caused by Parkinson's disease.

         Clinical  researchers  have shown that  transplantation  of human fetal
neural  cells into  Parkinsonian  patients is effective in treating the disease.
For example,  Swedish  researchers  have  demonstrated  survival and function of
transplanted  human fetal cells in  Parkinson's  disease  patients in an ongoing
study commenced in 1989. This study has shown cells surviving for at least eight
years and improvements in the patients' condition.  However, widespread clinical
application is limited by the lack of  availability  of human fetal neural cells
and ethical  concerns  regarding the use of human fetal tissue.  Moreover,  even
when  available,  the quality of human fetal cells is variable,  which may limit
the clinical effectiveness of such treatment.

         Diacrin's  approach  to the  treatment  of  Parkinson's  disease  is to
produce and transplant NeuroCell(TM)-PD to replace the function of those neurons
damaged by the disease.  The Company and its collaborators  have shown in animal
models that these  transplanted  cells become  integrated  into the  surrounding
brain tissue and correct functional  defects.  While  NeuroCell(TM)-PD  is not a
cure for  Parkinson's  disease,  the goal of this treatment is to  significantly
improve the  clinical  condition  of patients  with severe  Parkinson's  disease
sufficiently to allow them to function independently.

         Diacrin   harvests  fetal  porcine   midbrain  cells  under  cGMPs  for
transplantation. These cells are functionally indistinguishable from human fetal
neural  cells.  The  porcine  tissue  source  has been  developed  by Diacrin in
conjunction with Tufts University School of Veterinary Medicine  ("Tufts").  The
cell  isolation  and testing  has been done in  conjunction  with the  Company's
academic  collaborators  at  Harvard  Medical  School.  Company  scientists,  in
conjunction  with  academic  collaborators,  have shown  reversal of  functional
deficits  in  a  rodent  model  of   Parkinson's   disease   transplanted   with
NeuroCell(TM)-PD.  Under  a  Diacrin-sponsored  research  program,  a  non-human
primate model for Parkinson's  disease was transplanted  with  NeuroCell(TM)-PD.
Results  confirmed the presence of viable cells in the  transplantation  site at
the conclusion of this 17-month study.

         In  October  1996,   enrollment   in  a  Phase  1  clinical   trial  of
NeuroCell(TM)-PD in patients with severe Parkinson's disease was completed. This
trial, which was initiated by the Company in April 1995 and, since October 1996,
has been  conducted  by  Diacrin on behalf of the Joint  Venture,  was the first
FDA-authorized  trial  involving  transplantation  of porcine cells into humans.
Although the study was designed to evaluate the safety of NeuroCell(TM)-PD,  its
effects on the  Parkinson's  disease  symptoms of the transplant  recipients are
also being evaluated. The NeuroCell(TM)-PD  clinical trial is being conducted at
the Lahey Hitchcock Clinic in Burlington, Massachusetts and at Boston University
School of Medicine under an IND application.

         All twelve  patients were  transplanted  unilaterally  (one side of the
brain) with approximately 12 million cells using standard  stereotactic surgical
techniques.  Eleven  patients  continue to be  evaluated as part of the clinical
trial.  In  January  1996,  the  twelfth  patient,  a  69-year  old male who had
undergone  NeuroCell(TM)-PD  transplant surgery in May 1995, died of a 

<PAGE>

pulmonary
embolism.  An autopsy  determined that this patient's death was unrelated to the
transplant.  A  histological  study of this patient  published in the March 1997
issue of Nature Medicine  demonstrated  that fetal pig neural cells survived and
matured in his brain.  This study marked the first  published  documentation  of
survival of cells transplanted from another species into the human brain and the
appropriate growth of the non-human neurons in a Parkinsonian brain.

         It is expected that any clinical  improvement  of  Parkinson's  disease
patients  after  transplantation  will occur  gradually as the fetal pig neurons
mature.  All eleven  Parkinson's  disease patients in the Phase 1 clinical study
have been evaluated at twelve months post-transplantation. The patients continue
to demonstrate  statistically  significant  clinical  improvement one year after
transplantation (p-value of 0.01) as measured by the Unified Parkinson's Disease
Rating Scale.

         In 1999, the Joint Venture plans to continue to accrue  patients into a
Phase 2 clinical trial  involving the  transplantation  of  NeuroCell(TM)-PD  in
conjunction  with  cyclosporine  immunosuppression  versus a  control  group.  A
planned  second Phase 2 clinical  trial,  that the Joint  Venture  expects to be
initiated in the second  quarter of 1999,  will involve the  transplantation  of
NeuroCell(TM)-PD using the Company's proprietary immunomodulation technology. It
is  anticipated  that all  transplanted  patients in these  trials will  receive
approximately  48 million  cells  transplanted  bilaterally  (both  sides of the
brain).  Assuming successful completion of these trials, the Joint Venture plans
to conduct two Phase 3 clinical trials beginning in early 2000.

NeuroCell(TM)-HD for Huntington's Disease

         Huntington's  disease is a  genetically  transmitted  disease  which is
caused  by  a  loss  of  the  specific   type  of  neurons   which  produce  the
neurotransmitter  gamma aminobutyric acid ("GABA").  The loss of these GABAergic
cells results in a  progressive  deterioration  marked by  discordant  movement,
intellectual   impairment   and  a  spectrum  of   psychiatric   and  behavioral
disturbances.  The  majority  of cases of  Huntington's  disease  first  present
between 40 and 50 years of age. There are approximately  25,000 people diagnosed
with Huntington's disease in the United States.  Currently there is no effective
therapy for Huntington's disease. Treatment is palliative with tranquilizers and
anti-psychotic  drugs being the only  options.  The Company has received  orphan
drug designation for NeuroCell(TM)-HD. See "Government Regulation."

         Diacrin's  approach to treating this disease  consists of producing and
transplanting  NeuroCell(TM)-HD  to replace the  function of neurons  damaged by
Huntington's disease. Fetal porcine neurons from an area of the brain called the
lateral ganglionic eminence are harvested under cGMPs for  transplantation  into
the  striatum  of the  graft  recipient's  brain.  Diacrin  and  its  scientific
collaborators  have  tested  NeuroCell(TM)-HD  in a non-human  primate  model of
Huntington's  disease.  Results indicate that NeuroCell(TM)-HD has significantly
improved the behavioral defect in this model.  This study  demonstrated that the
transplanted  neural cells become  integrated  into the brain tissue and assumed
the function of GABAergic neurons which have been destroyed in this model.

         The Company, on behalf of the Joint Venture,  has completed  enrollment
in a  12-patient  Phase 1  clinical  trial  with  NeuroCell(TM)-HD  transplanted
unilaterally.  The  Company  is not aware of 

<PAGE>

any other  potential  treatment  of
Huntington's  disease  cleared  by the FDA for  clinical  trials  in the  United
States.  The Phase 1 clinical trial is being conducted at the Boston  University
School of Medicine,  Lahey Hitchcock Clinic, and Brigham and Women's Hospital in
Massachusetts and at Rush-Presbyterian-St.  Luke's Medical Center in Chicago. As
with neural cell  transplantation  for Parkinson's  disease, it is expected that
any clinical  improvement  would occur gradually over a period of months.  As of
October  1998,  all 12 patients  treated have been  evaluated at least  eighteen
months  post-transplantation.  The Huntington's  disease patients that have been
transplanted  with  NeuroCell(TM)-HD  have  tolerated the procedure well and the
preliminary  clinical data  suggests that the product is safe.  Efficacy data is
currently being  evaluated.  Assuming  satisfactory  results,  the Joint Venture
plans to initiate a Phase 2 clinical  trial in 1999 to  determine  the effect of
NeuroCell(TM)-HD transplanted bilaterally.

NeuroCell(TM)-FE for Focal Epilepsy

         Epilepsy is a chronic,  recurrent  disorder  characterized by excessive
neuronal discharge in the brain, causing muscle spasms or convulsions. Epileptic
seizures are usually  associated  with some  alteration  of  consciousness.  The
seizures  are  of  many  different  types  and  arise  as a  result  of  diverse
pathologies.  Epilepsy is one of the most common  neurological  disorders and is
estimated to affect 1.8 million people in the United States.

         Epileptic  seizure  classification  is  important  clinically  since it
determines  the drug therapy  used for seizure  control.  Clinical  diagnosis of
seizures includes  differentiation  by onset and whether or not consciousness is
lost.  Seizures can be classified  into three broad  categories  based on onset:
generalized seizures,  partial seizures and unclassified  seizures.  Generalized
seizures exhibit no focus of onset,  cause loss of consciousness  and may or may
not  cause  convulsions.  They  comprise  approximately  40%  of  all  epileptic
seizures.   Partial   seizures  have  a  focal  onset  and  may  cause  loss  of
consciousness  (complex partial seizures) or may not cause loss of consciousness
(simple partial  seizures).  Partial seizures comprise  approximately 57% of all
epileptic seizures. The remaining 3% of seizures are unclassified.

         The  anti-epileptic  drugs  currently  used  fail  to  control  seizure
activity in a significant  number of patients and frequently  cause side effects
that range in severity from minimal  impairment of the central nervous system to
death  from  aplastic  anemia  or  hepatic  failure.  In 1993,  the  market  for
anti-epileptic agents was approximately $525 million in the United States.

         Diacrin's initial therapeutic focus in this area is in the treatment of
patients with complex  partial  seizures.  By several  estimates,  approximately
200,000  patients  with complex  partial  epilepsy  have  seizures  that are not
well-controlled  with currently  available drug therapy.  The only other therapy
available to these  refractory  patients is surgical  removal of portions of the
temporal lobe,  amygdala and  hippocampus.  However,  the Company  believes that
transplantation  of cells  will be  preferable  to  removal  of brain  tissue if
NeuroCell(TM)-FE is shown to be safe and efficacious.

         Because  focal  epilepsy  is  characterized  by  excessive   electrical
activity in a localized area and the spread of this activity  through the brain,
Diacrin's  approach  to therapy is to apply its  proprietary  technology  to the
production  and  transplantation  of  NeuroCell(TM)-FE  in  order  to  exert  an
inhibitory effect on the  hyperexcitable  brain region. The source of inhibitory
neurons being evaluated for  NeuroCell(TM)-FE is the lateral ganglionic eminence
("LGE") within the fetal 

<PAGE>

porcine striatum. Diacrin has demonstrated survival and
safety of  transplanted  NeuroCell(TM)-FE  in a  preclinical  animal  model when
transplanted into the hippocampus.

         In  1998,   the  Company   initiated  a  Phase  1  clinical   trial  of
NeuroCell(TM)-FE  at Beth Israel Deaconess Medical Center in Boston. The Company
has transplanted three patients to date and anticipates transplanting a total of
six patients  previously  scheduled  for surgical  removal of the portion of the
brain causing the seizure activity. Upon surgical removal of that portion of the
brain  at  six  months  post-transplant,   the  Company  will  be  afforded  the
opportunity to histologically  analyze the graft and graft site for the presence
of viable  pre-treated  GABAergic  porcine neural cells. In addition,  the trial
will generate  safety data necessary to determine  whether to initiate a Phase 2
clinical trial of NeuroCell(TM)-FE.

Porcine Neural Cells for Stroke

         Stroke  is the  third  leading  cause of death  in the  United  States,
ranking behind coronary artery disease and cancer.  It is also the leading cause
of long-term disability in the U.S. Approximately 500,000 people suffer a stroke
each year in the U.S.

         Thrombolytic stroke (cerebral infarction)  represents nearly 80% of all
cases of stroke each year and is caused  primarily  by thrombus  formation  in a
blood  vessel  which  effectively  blocks  blood  flow to a region of the brain,
causing neuronal cell death.

         Current  therapies  include  surgical  management  to  remove a clearly
defined clot or  anticoagulant  therapy to "break up" the clot formation.  While
such  therapies  increase the  likelihood  of  surviving a stroke,  the neuronal
damage caused by the initial trauma remains.

         The Company believes disabled  patients who have survived  thrombolytic
stroke may benefit from porcine fetal neural cell transplantation for the repair
of the damaged  neuronal  circuitry  caused by stroke.  Several  animal  studies
conducted by others  utilizing  allografts have  demonstrated the feasibility of
repairing  and  restoring  function  to the  stroke  damaged  brain.  This  cell
population  is  expected to be most useful in  treating  striatal  and  cortical
thrombolytic strokes, which occur at a rate of over 160,000 annually in the U.S.
The Company has completed  preclinical  animal studies and an IND has been filed
and cleared by the FDA. In 1999,  the  Company  initiated a six patient  Phase 1
clinical trial at Beth Israel Deaconess Medical Center in Boston.

Porcine Neural Cells for Chronic Intractable Pain

         Chronic pain can be caused by neuropathologic  processes in tissues and
organs,  or by prolonged  dysfunction  of peripheral or central  nervous  system
pathways.  Peripheral  neuropathies  including  diabetic  neuropathy,   cervical
radiculopathy,  neuralgic amyotrophy, HIV neuropathy and post herpetic neuralgia
can  result  in  persistent  intractable  pain.  It is  estimated  that  400,000
individuals  suffer from unrelieved chronic pain as a result of these peripheral
neuropathies  in the United  States.  Moreover,  intractable  chronic  pain is a
common component of many end-stage disease syndromes. Pain affects most patients
with  malignant  disease and the  prevalence  of severe pain in cancer  patients
increases  as the  disease  progresses  to the  advanced  stages.  There  are an
estimated 1.6 million cancer patients that experience  chronic  intractable pain
in the United States.

<PAGE>

         The severity of pain can be debilitating  and  significantly  interfere
with an individual's  productivity and quality of life.  Existing  therapies for
chronic pain are often  inadequate and  characterized  by the tendency to become
ineffective with time. Potent opiates are part of analgesic  regimens,  however,
dose-limiting  side effects,  tolerance and potential for dependence limit their
widespread use.

         The persistence of pain following damage to or prolonged dysfunction of
the nervous system involves a cascade of pathological  neurochemical events that
lead to  abnormal  sensory  hyperexcitability  and  excitotoxicity.  The altered
spinal  neurochemical  environment results in an impairment of neural inhibitory
function.  Specifically,  inhibitory  GABAergic  interneurons are susceptible to
excessive excitatory amino acid release.

         Diacrin's   therapeutic   approach  for  the   management   of  chronic
pathological pain is to inhibit the  hyperexcitability  cascade by transplanting
fetal neural  GABA-releasing cells in the spinal dorsal horn (the section of the
spine mediating pain perception). By using this approach, alleviation of chronic
pain  may  be  achieved  by  repopulating  inhibitory  interneurons  to  recover
appropriate  neurotransmission  in the spinal cord.  Preclinical  animal studies
have  demonstrated a favorable  safety profile and survival of fetal porcine LGE
(GABA-releasing) cells transplanted into the dorsal horn of the spinal cord. The
Company has filed an IND and plans to initiate a Phase 1 clinical trial in 1999.

Porcine Spinal Cord Cells for Spinal Cord Injury

         The U.S.  prevalence  of Spinal  Cord Injury  ("SCI") is  approximately
200,000  with  13,000  additional  SCI's  annually.  Nearly  80% of the  injured
patients are males in their late twenties to early thirties. Greater than 95% of
these SCI's are compression injuries,  the remainder are cases in which the cord
is severed.  The cervical  spine is vulnerable to injury  because of its extreme
mobility.  Approximately  20% of SCI occur in the thoracic  region which is more
stable due to extra support  supplied by the ribs. Loss of  sensorimotor  neuron
function  due to injury  requires  lengthy  hospitalization  after  the  initial
accident as well as extensive  rehabilitative  care. Further, all victims of SCI
face a lifelong series of acute and chronic non-neurological  complications that
can be life-threatening.

         The primary  objective  of current  therapies  available  for SCI is to
prevent   further   injury   by   physically   stabilizing   the  spine  and  by
pharmacologically  attenuating the endogenous injury response.  These strategies
attempt to establish  optimal  conditions  for  functional  recovery and improve
patients' rehabilitative  potential.  Surgery is designed to protect the patient
from  further  injury  through  immobilization,   spinal  cord  realignment  and
stabilization,  and decompression. To date there is no pharmacotherapy available
for spinal cord injury except palliative therapies employing  methylprednisolone
(corticosteroid) therapy to reduce inflammation of the initial traumatized area,
and  standard   medical   practice  for   complications   arising  from  chronic
denervation,  (for example,  pneumonia,  pulmonary  embolism,  decubitus ulcers,
urinary tract  infections,  renal failure,  deep vein thrombosis and heterotopic
ossification  of  bone)  and,  if  required,  medical  therapy  for  psychiatric
disorders.

         Diacrin  believes that its porcine  spinal cord cell product  candidate
transplanted into the site of injury of a human severed spinal cord may have the
potential  to  partially  reestablish  


<PAGE>

sensorimotor   neuronal  pathways.   The
transplantation  of this  product  into a  recently  injured  cord  may  prevent
secondary  neuronal  and  muscular  atrophy  known to  occur in these  patients.
Partial or full recovery of limb movement,  and other motor neuron  pathways may
reduce the overall time spent in the hospital,  decrease the secondary equipment
required for care, and reduce severe and life threatening  complications arising
from the  injury.  Further,  the ability to deliver  fetal  neurons to a site of
injury  in a  severed  spinal  cord  may have  broader  technical  and  clinical
applications.  Once proof of principle is realized in the severed SCI, the fetal
porcine  cell  product  will be  delivered  to sites in the  spinal  cord  where
compression fractures have occurred. The Company has initiated studies in animal
models of spinal cord injury to  determine  whether  fetal  porcine  spinal cord
cells  transplanted  into the damaged spinal cord region will engraft and repair
the damage,  leading to improved  mobility  and  function.  Assuming  successful
completion  of the  Company's  ongoing  studies,  the Company  plans to seek FDA
clearance to initiate human clinical trials.

Porcine Hepatocytes for Acute Liver Failure

         Acute  liver  failure is a severe  life-threatenting  disease  that can
result  from  alcohol  consumption,  viral  infections  (hepatitis  B and C) and
hepatotoxic  drugs or toxins.  The clinical  spectrum of acute liver disease can
vary from an asymptomatic  patient with  hepatomegaly to the  manifestations  of
severe liver failure (ascites, jaundice and encephalopathy).  The mortality from
acute liver failure can be as high as 70%, with patients dying from infection GI
bleeding, and hepatorenal or multi-organ failure. Acute liver failure results in
approximately 63,000 deaths annually in the U.S.

         There is  currently no universal  therapy  that is  beneficial  for all
patients with acute liver failure.  The best  available  therapy for acute liver
failure is orthotopic liver  transplantation.  However, many patients are unable
to be listed as candidates for liver  transplantation due to multi-organ failure
or active alcohol  consumption.  Current therapy attempts to treat complications
arising  from  the  acute  condition,  i.e.  cerebral  edema,  infections,   and
circulatory collapse. Treatment of the acute phase of liver failure with hepatic
support can result in partial  normalization of clinical  parameters and limited
restoration of a functional liver, but the likelihood of survival remains low.

         An  alternative  approach to the treatment of acute liver failure is to
support  the patient by  hepatocyte  transplantation  in order to provide  liver
function while allowing the patient's own liver to recover.

         In extensive studies of hepatocyte transplantation for the treatment of
metabolic disease in animal models,  Diacrin  scientists have shown that porcine
hepatocytes  can be isolated  and infused  into the  recipient  liver where they
lodge and continue to function.  Long-term  survival and function of these cells
has been demonstrated.  Hepatocytes are able to pass through the lining of liver
capillaries  and integrate into the liver where they can function  alongside the
host cells.  Therefore,  the Company believes hepatocyte  transplantation  could
become a viable alternative to whole liver  transplantation for the treatment of
acute liver disease.  This approach would be preferable to  transplantation of a
whole  liver due to the  difficulty  of  obtaining  livers  for  transplantation
(currently over 5,000  individuals  await liver transplants in the United States
and about 4,000 liver transplants are performed per year for all indications) as
well as the expense and invasiveness of the procedure.

<PAGE>

         The Company's IND  application  to the FDA for a Phase 1 clinical trial
to test  transplantation  of  porcine  hepatocytes  for the  treatment  of liver
failure has been cleared.  Patients in this planned trial will not be candidates
for  orthotopic  liver  transplantation  and will have been diagnosed with acute
liver  failure.  The  patients  selected  for this  trial,  which is  planned to
commence at Massachusetts  General Hospital in the first half of 1999, will have
failed all other available medical therapy. This subgroup of patients would have
an  expected  in-hospital   mortality  of  approximately  70%  and  is  thus  an
appropriate  group  for  the  evaluation  of  liver  function  after  hepatocyte
transplantation. Porcine hepatocytes will be infused into the spleen or liver of
these patients by interventional  radiology,  thus avoiding a surgical procedure
for these  critically  ill  patients.  In  addition to the high level of quality
control that can be maintained over the production of porcine hepatocytes, these
cells also have the advantage of being resistant to infection by human hepatitis
B and C viruses. Since many of the patients enrolled in this study are likely to
carry these viruses, the Company believes the resistance of the porcine cells to
infection  may prevent  infection of the  transplanted  hepatocytes  providing a
further  advantage over human liver  transplantation  in which hepatitis B and C
reinfect donor livers.

Human Hepatocytes for Cirrhosis

         Cirrhosis  of the liver is a common  affliction  in the United  States,
affecting  an estimated  1.5 million  individuals  and leading to  approximately
50,000 deaths  annually.  In cirrhosis,  liver tissue is  progressively  lost to
accumulation  of fibrous tissue and scarring,  and liver function is compromised
due to the degenerative  changes.  The most common causes of cirrhosis are viral
hepatitis B and C infections and alcoholic liver disease.  In the initial stages
of the disease the patient may  experience  jaundice and  disorientation  as the
detoxifying  functions  of the liver are lost.  With more serious  disease,  the
patient will develop  ascites and will be hospitalized  with increasing  central
nervous  system  effects  (encephalopathy)  that  lead to coma.  The  tremendous
reserve of liver tissue allows the continued  function of the organ despite loss
of up to 90% of the normal  complement of  hepatocytes.  In advanced  cirrhosis,
little normal liver tissue remains.

         The only known therapy for advanced cirrhosis is liver transplantation.
However,  the United  Network of Organ Sharing has documented a national lack of
donor livers for transplantation,  resulting in a waiting period of over 2 years
for the average patient requiring liver  transplantation.  Recently,  artificial
extra-corporeal liver assist devices ("ELAD") using porcine hepatocytes or human
hepatoma  cell  lines  attached  to a  dialysis  cartridge  have been used in an
attempt to treat liver  failure in advanced  cirrhosis.  Studies to date suggest
that ELAD may improve some biochemical parameters such as ammonia levels but the
devices have not resulted in increased  survival.  Allogeneic  human  hepatocyte
transplantation has also been used in both acute and chronic liver failure. Both
transplantation  into the liver via the portal vein and ectopic  transplantation
into the spleen  have been used in these  studies.  In pilot  studies by others,
liver and splenic hepatocyte  transplantation has been shown to be both safe and
potentially  effective  in  humans as a bridge  to  orthotopic  transplantation.
Immunosuppression  is  required  in  all  patients  receiving  allogeneic  human
hepatocyte transplantation.

         For  chronic  liver  disease,  Diacrin  and others have shown in animal
models that  hepatocyte  integration is possible when  hepatocytes  are injected
into the liver via the portal vein or into the splenic pulp.  The spleen appears
to be the  preferred  site due to the  fibrosis  and loss of blood supply to the
liver.  In  animal  models,  hepatization  of the  spleen  is a  well  described

<PAGE>

phenomenon  and  results  in  replacement  of the  splenic  pulp  with  cords of
functioning  hepatocytes that perform hepatic functions  including  synthesis of
albumin  and  clotting   factors,   detoxification   of  ammonia  and  oxidative
metabolism.

         In  1999,  the  Company  initiated  a Phase 1  clinical  trial of human
hepatocyte transplantation for the treatment of cirrhosis in a group of patients
that have been listed for organ  transplantation but are likely to wait at least
one year before receiving a transplant.  The Company believes these patients may
benefit from the growth of  transplanted  hepatocytes in their spleen leading to
an increase in liver  function.  In  addition,  expansion of the cells may allow
sufficient  improvement to render a liver transplant unnecessary unlike the case
of an ELAD  which is used  only as a bridge to  transplantation.  As part of the
planned  trial,  conventional  immunosuppression  will be compared to the use of
Diacrin's  immunomodulation  technology to determine whether graft protection is
achieved by this technique.  This study is being conducted in collaboration with
Massachusetts General Hospital.

Additional Hepatocyte Applications

         Successful delivery of hepatocytes to patients with alcoholic hepatitis
or cirrhosis may open the  possibility of applying this  technology to a variety
of other diseases. The preparation of the cells and their delivery by radiologic
procedures  should be the same in each of these  applications,  thus providing a
platform that may be used in multiple applications.

         Additional   applications  include  the  use  of  hepatocytes  for  the
treatment of metabolic  diseases  resulting  from  genetic  mutations.  Familial
hypercholesterolemia  is a disease  caused by a defective  receptor gene for low
density lipoprotein ("LDL") that leads to elevated levels of LDL cholesterol and
coronary  disease at an early age.  By  transplantation  of  hepatocytes  into a
rabbit model of this disease,  Diacrin  scientists have shown that porcine cells
provide  the animal with  functional  receptors  that  reduce  serum LDL levels.
Familial  hypercholesterolemia  afflicts  approximately  500,000 patients in the
United States.  Currently  available drugs do not sufficiently lower circulating
LDL cholesterol  levels in  approximately  20% of these  patients,  who may thus
benefit from hepatocyte transplantation. Additional metabolic disorders that may
be candidates for treatment by hepatocyte  transplantation  include  hemophilia,
phenylketonuria,    carbamoyl   phosphate   synthetase   deficiency,   ornithine
transcarbamolyase deficiency, Crigler-Najjar syndrome, and disorders of glycogen
metabolism. Approximately 30,000 patients in the United States suffer from these
metabolic disorders.

Human Myoblasts for Cardiac Disease

         Coronary  heart  disease  is the  leading  cause of death in the United
States,  responsible  for 1 of every 4.8 deaths or close to 500,000  deaths each
year.  The  disease is caused by the  accumulation  of  atherosclerotic  plaque,
consisting of lipid deposits,  macrophages  and fibrous tissue,  on the walls of
vessels supplying heart muscle.  Rupture of unstable plaques exposes  substances
that  promote  platelet  aggregation  and  thrombus  formation.  The thrombus is
composed of platelets,  blood cells and fibrin that can block one or more of the
coronary  vessels,  resulting  in an  inadequate  supply  of oxygen to the heart
muscle.  This  highly  active  muscle is quickly  damaged  and the  lesions  are
irreversible because cardiomyocytes,  the specialized muscle cells of the heart,
are not capable of cell division.  The end result is an infarct,  a damaged area
of heart muscle in which necrotic cardiomyocytes are replaced by scar tissue and
fibrosis,  


<PAGE>

weakening the contractility  and function of the heart.  According to
the American  Heart  Association,  approximately  1,000,000  heart attacks occur
annually in the U.S. Of the 800,000 patients who survive,  approximately 200,000
will die within a year.

         Treatments  to prevent  ischemic  damage after a myocardial  infarction
include  thrombolytic  drugs that break down  fibrin  clots and open up occluded
arteries.  These drugs have greatly  influenced  morbidity  and  mortality  from
occlusive  events,  but must be  administered  within a short  interval  after a
myocardial  infarction to be effective.  Even with current  medical  management,
over  one   third  of  acute   myocardial   infarctions   are   fatal.   Cardiac
catheterization  and  angioplasty to dislodge the thrombus and open the occluded
vessel  has  proved   effective  in  restoring   perfusion  but  cannot  reverse
preexisting ischemic damage.

         While  cardiac  myocytes do not have the  capacity to divide and repair
damaged myocardium,  skeletal muscle contains cells called myoblasts that divide
when called upon to repair damaged muscle.  Diacrin scientists have isolated and
expanded myoblasts from human tissue and are studying the use of these cells for
transplantation  into damaged heart muscle.  The Company  believes that patients
suffering from myocardial  infarctions  would benefit greatly if these myoblasts
could  repair their  damaged  myocardium.  These cells would be isolated  from a
muscle  biopsy of a patient who had suffered a myocardial  infarction  and would
thus allow  transplantation  of a  patient's  own  myoblasts  into their  heart,
thereby avoiding any immunological  barriers.  Preclinical  studies conducted by
Diacrin have demonstrated that myoblasts  integrate into rodent heart muscle. In
a large animal model of myocardial  infarction,  Diacrin has  demonstrated  that
myoblasts  can be  delivered  to the  site of an  infarct  by  infusion  via the
coronary  vessels  (allowing  use  of  the  radiological   procedures  currently
practiced for angioplasty). These cells survive and infiltrate the myocardium in
and around the infarct zone.  These studies are now being  extended to determine
whether the  myoblasts  infused into  infarcted  myocardium  repair the damaged,
ischemic  tissue.  Any  improvement  will be  measured by  increased  myocardial
contractility and cardiac output. Assuming successful completion of these animal
studies,  the Company  plans to seek FDA  clearance to initiate  human  clinical
trials.

Retinal Epithelial Cells for Macular Degeneration

         Age  related  macular  degeneration  ("AMD") is a disease of the retina
characterized by the loss of vision due to the atrophy of  photoreceptors in the
central part of the retina,  the macula lutea.  The macula is the most important
part of the eye for central vision and for high  resolution  vision such as that
used in reading and driving.  Retinal  pigment  epithelial  (RPE) cells that lie
beneath the  light-sensing  cells responsible for vision provide support for the
retinal  photoreceptors  and digest the discarded  outer  segments of the neural
retina.

         In AMD, abnormal  accumulation of metabolic debris results from reduced
activity of the RPE and leads to gradual loss of  photoreceptors.  The RPE cells
become  dysfunctional  and metabolic  by-products  damage  photoreceptors,  thus
compromising visual acuity. As this layer of cells does not readily replicate in
the  adult,  damage  to  the  RPE  can be  irreversible  and  lead  to  loss  of
photoreceptors with concomitant decreased visual acuity. Macular degeneration is
a common  disease,  affecting  13  million  people in the United  States.  It is
primarily a disease of the  elderly,  with 19.4% of 65-74 year olds and 36.8% of
individuals  over 75 having vision loss.  Approximately  85%-90% of AMD patients
have the "dry " form 


<PAGE>

of the disease in which the RPE layer  degenerates  without
new blood vessel growth and 10-15% have the "wet" form.  Effective therapies for
AMD are not currently available.

         Diacrin's approach is to repopulate the dysfunctional RPE cell layer by
transplanting  RPE cells into the  correct  anatomical  space  below the retinal
photoreceptors.  This  therapeutic  approach has the  potential  to  reestablish
function in the macula,  prevent  further  loss of vision and to improve  visual
acuity in patients presenting with the dry form of the disease. In patients with
the wet form of AMD, this therapy could be used in  conjunction  with surgery to
remove choroidal neovascular  membranes.  Because of its key role in maintaining
the integrity of the photoreceptors and its lack of regenerative  capacity,  the
idea  of  replacing  defective  RPE by  transplantation  is an  attractive  one.
Recently,  RPE  transplantation has been performed by others in the clinic using
human fetal RPE cells.  The  Company  plans to use porcine  fetal  tissue,  thus
avoiding the ethical and practical  problems of obtaining  aborted human tissue.
Preclinical studies are in progress to demonstrate the efficacy of fetal porcine
RPE cells for the repair of damaged RPE in animal models.  The Company will also
test its  proprietary  immunomodulation  technology to prevent  rejection of the
graft.  Assuming successful completion of preclinical studies, the Company plans
to seek FDA clearance to initiate human clinical trials.

Manufacturing

         The  manufacture of the Company's  products will require the continuous
availability of porcine tissue harvested under cGMPs from pigs tested to be free
of  infectious  agents.  The  Company's  current  source of pig  facilities  and
services is obtained under contracts from Tufts and Charles River Pharmservices,
Inc. The Company has also  qualified  several pig  producers to provide pigs for
the Company's production processes.  The Company's current long-range plan is to
establish  contractual  relationships  with  pig  producers  for the  supply  of
qualified pigs.

         For the Phase 1  clinical  trials of the Joint  Venture  Products,  the
Company isolated and prepared  populations of porcine tissue in its own clinical
production  facilities.  The Joint Venture has  finalized a three-year  sublease
agreement with Genzyme's Tissue Repair Division for approximately  12,000 square
feet of clinical  production  and support space for the  production of the Joint
Venture  Products  needed in  conjunction  with planned  clinical  trials.  This
facility is also believed to be capable of satisfying  projected  initial demand
for commercial  quantities of the Joint Venture Products.  This arrangement will
enable the Company to utilize its existing  clinical  production  facilities for
the clinical  supply of other  product  candidates  and to postpone the need for
significant additional investment in such facilities.

         The antibody fragment used in Diacrin's immunomodulation  technology is
currently obtained from a contract manufacturer. The Company will evaluate on an
ongoing basis the cost  effectiveness  and other relevant  factors  necessary to
determine  whether the Company should  continue to obtain the antibody  fragment
from a contract manufacturer or produce the antibody fragment on its own.

         The  Company's  long-range  plan  is to  establish  certain  of its own
internal manufacturing capabilities, including the facilities necessary to test,
isolate  and package an adequate  supply of finished  cell  products in order to
meet its long-term clinical and commercial manufacturing needs.


<PAGE>



Patents and Licenses

         The Company  intends to  aggressively  seek patent  protection  for any
products it develops. The Company also intends to seek patent protection or rely
upon trade secrets to protect certain of its technologies  which will be used in
discovering and evaluating new products.  The Company has 7 issued U.S.  patents
and 22 patent  applications  pending with the United States Patent and Trademark
Office.  Foreign  counterparts  have  also been  filed in a number  of  selected
countries.  These applications seek composition-of-matter and use protection for
the various  products the Company has in development.  Applications  are on file
for neurons,  hepatocytes,  cardiac  myocytes and  expansions  of the  Company's
technology base.

         MGH has been  awarded two  patents in the United  States  covering  the
basic immunomodulation technology used by Diacrin. Foreign counterparts of these
patents  have been  filed.  Under an  agreement  with MGH,  the  Company  has an
exclusive,  worldwide license to the technology and the inventions  described in
the patent, and all foreign counterparts, including any continuations,  reissues
or  substitutions  as well as any patents and equivalents  which may mature from
such patent, subject to the payment of royalties.  Unless sooner terminated, the
Company's rights will continue, on a country by country basis, until the last to
expire of the  patents,  at which  time the  Company  will have a fully  paid-up
license. Either party may terminate the agreement, upon notice, in the event the
other party  defaults in its  material  obligations  and has failed to cure such
default within 60 days of receipt of such notice.

         In September 1996, the Company and Genzyme entered into an agreement to
form a joint venture to develop and commercialize the Joint Venture Products. In
connection  with that  agreement,  the Company  granted to the Joint Venture the
exclusive,  worldwide,  irrevocable  (during  the  term  of  the  Joint  Venture
agreement),  royalty-free  right and license under the Company's existing patent
rights and technology to develop,  make, have made,  use, offer for sale,  sell,
have sold, import and export the Joint Venture Products.  The license granted by
the Company is limited to the treatment of Parkinson's  disease and Huntington's
disease in humans using  porcine  fetal cells (the  "Field").  In the event that
either the  Company or Genzyme  develops or acquires  additional  technology  or
patent rights that are useful in the Field,  the party owning such technology or
patent rights is obligated to offer a license to the Joint Venture, as described
above,  to such  technology or patent rights.  The  immunomodulation  technology
licensed to the Company  from MGH has been  non-exclusively  sublicensed  to the
Joint Venture for use exclusively in the Field.

         To protect its trade  secrets and other  proprietary  information,  the
Company requires all employees, consultants, advisors and collaborators to enter
into confidentiality agreements with Diacrin.


<PAGE>



Sales and Marketing

         Under the terms of the Joint Venture agreement,  Genzyme,  which has an
established   sales   force,   experienced   in  the  sales  and   marketing  of
biopharmaceutical  and surgical  products,  is authorized to market and sell the
Joint Venture  Products on an exclusive  basis as agent for and on behalf of the
Joint Venture.

         With regard to the Company's other product candidates,  the Company has
not yet  developed  sales  and  marketing  capabilities.  The  Company  may form
strategic alliances with established  pharmaceutical or biotechnology  companies
in order to finance the  development  of certain of its products  and,  assuming
successful  development,  to market such products. Such alliances may enable the
Company to expand or  accelerate  its product  development  efforts and also may
provide the Company with access to established marketing organizations.

Government Regulation

         Regulation by governmental authorities in the United States and foreign
countries is a significant factor in the development,  manufacture and marketing
of the  Company's  product  candidates  and in its ongoing  research and product
development  activities.  All of the Company's  products will require regulatory
approval by  governmental  agencies prior to  commercialization.  In particular,
human  therapeutic  products  are  subject  to  rigorous  testing  and  approval
procedures  by the FDA and similar  authorities  in foreign  countries.  Various
federal  statutes and regulations  govern the preclinical and clinical  testing,
manufacturing,  labeling,  distribution,  advertising and sale of such products.
The process of obtaining  these  approvals and the  subsequent  compliance  with
applicable   federal  statutes  and  regulations   require  the  expenditure  of
substantial time and financial and other resources.

         Preclinical testing is generally conducted in the laboratory on animals
to evaluate the potential  efficacy and the safety of a product.  The results of
these studies are submitted to the FDA as part of an IND application, which must
become effective before human clinical  testing can begin.  Typically,  clinical
evaluation  involves a  three-phase  process.  In Phase 1,  clinical  trials are
conducted  with a small number of human  subjects to determine  the early safety
profile.  In Phase 2,  clinical  trials are  conducted  with  groups of patients
afflicted with the specific disease in order to determine  preliminary efficacy,
optimal  treatment  regimens and expanded  evidence of safety. In Phase 3, large
scale,  multi-center,  comparative  clinical  trials are conducted with patients
afflicted  with a  target  disease  in  order  to  provide  enough  data for the
statistical  proof of safety and efficacy as required by the FDA and others.  In
addition,  the  FDA may  request  post-marketing  (Phase  4)  monitoring  of the
approved product, during which clinical data are collected on selected groups of
patients to monitor longer-term safety.

         Upon completion of Phase 3, for products  regulated by the FDA's Center
for Biologic  Evaluation and Research  ("CBER"),  the results of preclinical and
clinical  testing  are  submitted  to the FDA in the  form  of an  Establishment
License  Application  ("ELA")  and a  Product  License  Application  ("PLA")  or
Biologics  License  Application  ("BLA") (an integration of the PLA and ELA) for
approval to manufacture  and commence  commercial  sales. In responding to these
applications,   the  FDA  may  grant  marketing  approval,   request  additional
information or deny the  application if the FDA determines  that the application
does not satisfy its regulatory  approval  


<PAGE>

criteria.  The Joint Venture Products
and all of the  Company's  other  products are expected to be regulated by CBER.
The Company will also be subject to widely varying foreign regulations governing
clinical trials and sales of its products.  Whether or not FDA approval has been
obtained,  approval of a product by the  comparable  regulatory  authorities  of
foreign countries must be obtained prior to the commencement of marketing of the
product in those countries.  The approval process varies from country to country
and the time may be longer or shorter than that necessary for FDA approval.  The
Company  may rely on  licensees  to obtain  regulatory  approval  for  marketing
certain of its products in certain foreign countries.

         The Company intends to take advantage of the regulatory  pathways which
may provide accelerated marketing approval of its cell transplantation  products
and allow  limited cost  recovery  during the  clinical  research  phase.  These
include:  (i) marketing  exclusivity  for products which qualify for orphan drug
status;  (ii) approval for limited cost recovery during  clinical  testing under
treatment  IND  status;  and  (iii)  accelerated  marketing  approval  for  more
effective or better tolerated therapies for serious conditions.

         The  Orphan  Drug  Act  of  1983  generally   provides   incentives  to
manufacturers  to  undertake  development  and  marketing  of  products to treat
relatively  rare  diseases or diseases  where fewer than 200,000  persons in the
United  States would be likely to receive the  treatment.  A drug that  receives
orphan  drug  designation  by the FDA and is the first  product to  receive  FDA
marketing  approval for its product claim is entitled to a seven-year  exclusive
marketing  period in the  United  States for that  product  claim.  Orphan  drug
designation  can be terminated by the FDA for a number of reasons,  including if
the manufacturer of the orphan drug product cannot provide an adequate supply of
the product.  Furthermore,  a drug that is considered by the FDA to be different
than a  particular  orphan  drug is not barred  from sale in the  United  States
during such seven-year  exclusive  marketing period.  Legislation has previously
been  introduced  in Congress to limit the  marketing  exclusivity  provided for
certain orphan drugs. Although the outcome of that legislation, if reintroduced,
is uncertain, there remains a possibility that future legislation will limit the
incentives currently afforded to the developers of orphan drugs.

         Diacrin has assigned to the Joint  Venture the orphan drug  designation
it has received from the FDA for NeuroCell(TM)-PD for the treatment of Hoehn and
Yahr stage 4 and stage 5 Parkinson's disease patients and for  NeuroCell(TM)-HD.
Diacrin's  NeuroCell(TM)-FE,  and spinal  cord cells for spinal  cord injury are
also  targeted to  populations  of less than  200,000  and,  therefore,  will be
pursued as orphan drugs.

         Treatment  IND is a  mechanism  established  by the FDA in  1987  which
allows a company to distribute promising  investigational  therapies to patients
outside of the  established  clinical  trials and to charge a reasonable fee for
such therapy.  The disease must be serious or life-  threatening  and there must
not be  satisfactory  alternative  treatments.  Treatment  IND  status  has been
applied to a variety of diseases including cancer,  AIDS,  Parkinson's  disease,
Alzheimer's  disease and multiple sclerosis and to several  anti-infectives  for
renal transplant  patients.  Diacrin intends to pursue this  designation,  where
appropriate.

         In 1988,  the FDA issued a rule to expedite  the  testing and  approval
process for therapies which can treat life-threatening and severely debilitating
diseases.  Recently,  the FDA  published a rule which  expands  this  concept to
patients with chronic  illnesses  that are  generally  well managed by available
therapy but may have serious outcomes in some or all phases of the 


<PAGE>

disease.  The
Company believes that many of its potential  therapies may be covered under this
rule, which  accelerates the FDA approval process by reducing or eliminating the
need to conduct large, expanded (Phase 3) clinical studies prior to applying for
a marketing  license  (Subpart E regulation)  and allowing the use of "surrogate
endpoints" in clinical trials (Subpart H regulation).

         The Company is also subject to various  federal,  state and local laws,
regulations and recommendations relating to safe working conditions,  laboratory
and  manufacturing  practices,  the  experimental use of animals and the use and
disposal of hazardous or potentially hazardous substances, including radioactive
compounds,  infectious  disease  agents and  recombinant  DNA materials  used in
connection with the Company's research work.

Competition

         The Company believes that its ability to compete  successfully  will be
based on its ability to create and maintain  scientifically advanced technology,
develop proprietary products, attract and retain qualified scientific personnel,
obtain  adequate  financing,  obtain patents,  orphan drug  designation or other
protection  for  its  products,   obtain  required   regulatory   approvals  and
manufacture and successfully  market its products both independently and through
collaborators.

         The biopharmaceutical  and pharmaceutical  industries are characterized
by intense competition. The Company competes against numerous companies, many of
which have substantially greater financial and other resources than the Company.
Private and public academic and research  institutions also compete with Diacrin
in the research and development of human therapeutic products. In addition, many
of the Company's  competitors  have  significantly  greater  experience than the
Company in the testing of  pharmaceutical  and other  therapeutic  products  and
obtaining FDA and other regulatory approvals of products for use in health care.
Accordingly, the Company's competitors may succeed in obtaining FDA approval for
products  more rapidly than the Company.  If the Company  commences  significant
commercial  sales of its  products,  it will also be  competing  with respect to
manufacturing  efficiency  and  marketing  capabilities,  areas  in which it has
limited or no experience.

         The Company's products under development will compete with products and
therapies which are either currently  available or currently under  development.
Competition will be based, among other things, on efficacy, safety, reliability,
price,  availability of reimbursement and patent position.  The Company is aware
of other  companies  which are pursuing  research and development of alternative
products or  technologies  addressing  the same disease  categories as Diacrin's
development programs.

Employees

         As of January 31, 1999, the Company had 46 full-time  employees,  36 of
whom   were   engaged   in   research,   development,   clinical   and   quality
assurance/quality  control activities. No Company employees are represented by a
labor union or covered by a collective bargaining agreement.

Item 2.  Properties

         The  Company  leases a facility  which  contains  approximately  28,000
square  feet of space 


<PAGE>

in  Charlestown,  Massachusetts.  The lease has a ten-year
term ending in 2001,  providing for a base rental rate of approximately  $60,000
per  month,  plus  applicable  property  taxes  and  insurance.   The  Company's
facilities are equipped with laboratory and cell culture capabilities sufficient
to  satisfy  the  Company's  research  and  development   requirements  for  the
foreseeable  future and cell  isolation  capabilities  sufficient to satisfy the
clinical production  requirements of several of its product  candidates.  To the
extent that additional similar  facilities may be required,  the Company will be
required to secure additional  facilities or seek outside contractors to provide
such capabilities.

         The Joint  Venture has  finalized a sublease  agreement  ending in 2001
with Genzyme's  Tissue Repair Division for  approximately  12,000 square feet of
clinical  production  and support space for the  production of the Joint Venture
Products.  The sublease  agreement  provides for a minimum  gross rental rate of
approximately  $30,000  per  month  to be  paid  by  the  Joint  Venture.  These
facilities are equipped with cell isolation  facilities  which Diacrin  believes
are  sufficient  to satisfy  the  clinical  and  initial  commercial  production
requirements  of the Joint  Venture  Products.  To the  extent  that  additional
facilities are required for commercial production of the Joint Venture Products,
the Joint  Venture will be required to secure  additional  facilities to provide
such capabilities.


<PAGE>



Item 3.  Legal Proceedings

         None.

Item 4.  Submission of Matters to a Vote of Security Holders

         No matters were submitted to a vote of security holders of the Company,
through  solicitation  of proxies or  otherwise,  during the last quarter of the
fiscal year ended December 31, 1998.

Executive Officers of the Registrant

         The  following  table sets forth the names,  ages and  positions of the
directors, executive officers and other key employees of the Company:
<TABLE>
<CAPTION>

Name                                                  Age      Position
<S>                                                   <C>      <C>

Thomas H. Fraser, Ph.D. (1)                           51       President and Chief Executive Officer; Director

E. Michael Egan                                       46       Senior Vice President, Corporate Development

Kevin Kerrigan                                        28       Controller

Albert S. B. Edge, Ph.D.                              46       Senior Director of Molecular and Cellular
                                                               Biology

Jonathan H. Dinsmore, Ph.D.                           37       Director of Cell Transplantation Research

Roger J. Gay, Ph.D.                                   45       Director of Process Development

Abdellah Sentissi, Ph.D.                              49       Director of Quality Control and Quality
                                                               Assurance

Zola P. Horovitz, Ph.D. (1)                           64       Director

John W. Littlechild (2)                               47       Director

Stelios Papadopoulos, Ph.D. (1) (2)                   50       Director

Joshua Ruch                                           49       Director

Henri A. Termeer (2)                                  53       Director

Christopher T. Walsh, Ph.D.                           55       Director


- - ----------------------
<PAGE>

(1) Member of Audit and Finance Committee

(2) Member of Compensation Committee
</TABLE>


         Thomas H. Fraser, Ph.D., has been President and Chief Executive Officer
and a member  of the  Board of  Directors  of the  Company  since  1990.  He was
previously  Executive  Vice  President,   Corporate  Development,  for  Repligen
Corporation  ("Repligen"),  a  biopharmaceutical  company.  Dr.  Fraser  was the
founding  Vice  President for Research and  Development  at Repligen in 1981 and
served as  Executive  Vice  President  from 1982  through  1990 as well as Chief
Technical Officer from 1982 through 1988. Prior to joining Repligen,  Dr. Fraser
headed  the  recombinant  DNA  research  group in  Pharmaceutical  Research  and
Development at The Upjohn Company, a pharmaceutical company. Dr. Fraser received
his Ph.D. in biochemistry from the Massachusetts Institute of Technology and was
a Damon Runyon-Walter Winchell Cancer Fund Postdoctoral Fellow at The University
of Colorado.

         E. Michael Egan has been Senior Vice President,  Corporate Development,
of the Company since June 1993. Mr. Egan joined Diacrin from Repligen,  where he
was  employed  from 1983 to 1993,  and since  1989 had been  Vice  President  of
Business Development. He was also a member of the Board of Directors of Repligen
Clinical Partners, L.P., and the Secretary/Treasurer of Repligen Sandoz Research
Corporation.  Mr.  Egan's  previous  positions at Repligen  include  Director of
Business  Development  and  Manager of  Business  Development.  Prior to joining
Repligen in 1983,  Mr. Egan was a laboratory  supervisor at  Dana-Farber  Cancer
Institute,  Division of  Medicine.  He  received a B.S.  in biology  from Boston
College and a Certificate of Special  Studies in  Administration  and Management
from Harvard University in 1986.

     Kevin  Kerrigan has been  Controller of the Company since November 1998. He
joined the  Company in 1997 as  Accounting  Manager.  From 1993 to 1997 he was a
member of the professional  staff of Price Waterhouse LLP. Mr. Kerrigan received
a B.S.  degree  in  accounting  from  Merrimack  College  and was  awarded a CPA
certificate from the Commonwealth of Massachusetts in 1993.

         Albert S.B.  Edge,  Ph.D.,  has been Senior  Director of Molecular  and
Cellular  Biology since  October 1994. He joined  Diacrin in 1992 as Director of
Protein Chemistry and in 1993 became Director of Molecular and Cellular Biology.
Dr. Edge was  previously  Assistant  Professor  of  Medicine at Harvard  Medical
School and  Investigator  at the Joslin Diabetes  Center.  He has been Principal
Investigator  on several  grants from the NIH and was the  recipient of a Career
Development  Award from the Juvenile  Diabetes  Foundation from 1987 to 1990. He
was Mary K.  Iacocca  Fellow  of the  Joslin  Diabetes  Center in 1984 and after
appointment  to the faculty was selected as Capps Scholar in Diabetes of Harvard
Medical School from 1985 to 1987. While a Postdoctoral  Fellow in the Department
of  Biological  Chemistry  at  Harvard  Medical  School,  Dr.  Edge was  awarded
Fellowships  from the American Cancer Society and the NIH. He received his Ph.D.
in biochemistry from Albany Medical College where he was a Predoctoral  Research
Fellow of the United States Public Health Service.

<PAGE>

         Jonathan H. Dinsmore,  Ph.D., has been Director of Cell Transplantation
Research since December 1994. He joined Diacrin in 1992 as a Research  Scientist
and was  subsequently  promoted to  Principal  Investigator.  Dr.  Dinsmore  was
previously a Postdoctoral  Fellow of the American  Cancer Society in the Biology
department at the  Massachusetts  Institute of Technology  from 1988 to 1992. He
received a Ph.D. in biology from Dartmouth College,  where he was a Presidential
Scholar  and  recipient  of a Kramer  Fellowship.  Dr.  Dinsmore  has  worked on
National Science Foundation-sponsored research projects at the Marine Biological
Laboratories in Woods Hole,  Massachusetts  and at a United States research base
in Antarctica.

         Roger J. Gay,  Ph.D.,  has been Director of Process  Development  since
November 1993. From 1986 through 1993, he was Director of Product Development at
Organogenesis,  Inc. Dr.  Gay's  previous  positions  were Manager of a Contract
Research and Cytotoxicity Testing Laboratory and Director of Product Development
at Bioassay Systems  Research  Corporation from 1982 to 1986. He received a B.A.
in  chemistry  from  the  College  of the  Holy  Cross  in 1975  and a Ph.D.  in
biochemistry  from the University of Rochester in 1981.  From 1981 through 1983,
he was a  postdoctoral  research  fellow in the Department of  Microbiology  and
Molecular Genetics at Harvard Medical School.

         Abdellah  Sentissi,  Ph.D.,  has been  Director of Quality  Control and
Quality  Assurance since October 1995.  Prior to joining  Diacrin,  from 1992 to
1995, he served as the Director of QC/QA and Technical Affairs at Endocon,  Inc.
From 1985 through  1992,  he was the Chief of Quality  Control at  Massachusetts
Biologics  Laboratories.  He  received a  pharmacy  degree in 1973 and a biology
degree in 1976 from the University of Paul  Sabatier,  Toulouse,  France,  and a
Ph.D. in biomedical  sciences from  Northeastern  University in 1984.  From 1984
through  1985,  he was a  postdoctoral  research  fellow  in the  Department  of
Clinical  Chemistry  at  Northeastern  University.  He has  been a  lecturer  in
pharmaceutical   biotechnology   at  the  School  of  Pharmacy  at  Northeastern
University since 1990.

         Zola P. Horovitz,  Ph.D., has served as a Director of the Company since
May  1994.  He  was  Vice  President,   Business  Development  and  Planning  at
Bristol-Myers  Squibb  Pharmaceutical  Group from August 1991 until 1994 and was
Vice President,  Licensing from 1989 to August 1991. Prior to 1989, Dr. Horovitz
spent 30 years as a member of the Squibb  Institute for Medical  Research,  most
recently as Vice  President,  Research  Planning.  He is also director of Avigen
Inc., BioCryst Pharmaceuticals,  Clinicor,  Magainin  Pharmaceuticals,  Procept,
Inc., Roberts Pharmaceuticals and Synaptic Pharmaceuticals,  Inc., biotechnology
companies. Dr. Horovitz received his Ph.D.
from the University of Pittsburgh.

         John W.  Littlechild  has been a Director  of the  Company  since April
1992.  Mr.  Littlechild  is a general  partner of  HealthCare  Partners II, L.P.
("HCPII"),  HealthCare Partners III, L.P. ("HCPIII") and HealthCare Partners IV,
L.P. ("HCPIV"),  the general partner,  respectively,  of HealthCare Ventures II,
L.P. ("HCVII"), HealthCare Ventures III, L.P. ("HCVIII") and HealthCare Ventures
IV, L.P.  ("HCVIV"),  and a Vice Chairman of HealthCare  Ventures LLC ("HCV"), a
venture  management  company  that,  among  other  things,  provides  management
services  to HCVII,  HCVIII and  HCVIV.  HCVII,  HCVIII and HCVIV are  principal
stockholders  of the Company.  From 1984 to 1991, Mr.  Littlechild  was a Senior
Vice President of Advent  International  Corporation,  a venture capital company
("Advent")  in Boston and  London.  Prior to  working  at Advent in Boston,  Mr.
Littlechild was involved in establishing Advent in the United Kingdom. From 1980
to 1982, Mr. Littlechild served as Assistant Vice President for Citicorp Venture

<PAGE>

Corporation, a venture capital company, in London, prior to which he worked with
ICI Ltd., an agro-chemical company, and Rank Xerox, an office equipment company,
in marketing and financial  management.  He holds a B.Sc. from the University of
Manchester and an MBA from Manchester Business School. Mr. Littlechild serves on
the boards of  directors  of various  health care and  biotechnology  companies,
including  Orthofix  International  N.V., a medical devices  company,  and Avant
Immunotherapeutics, Inc., a biotechnology company.

         Stelios  Papadopoulos,  Ph.D., has been a Director of the Company since
November  1991.  He  is  Chairman  of  PaineWebber  Development  Corporation,  a
subsidiary  of  PaineWebber  Incorporated  ("PaineWebber"),  which is engaged in
investment banking and securities brokerage. From 1986 until joining PaineWebber
in April 1987,  Dr.  Papadopoulos  was a Vice  President  in equity  research at
Drexel Burnham Lambert  Incorporated,  an investment  banking firm. From 1985 to
1986, Dr. Papadopoulos was a biomedical technology analyst at Donaldson,  Lufkin
and Jenrette  Securities  Corporation.  Prior to that,  Dr.  Papadopoulos  was a
member of the faculty of the  Department of Cell Biology at New York  University
Medical  Center.  Dr.  Papadopoulos  holds a Ph.D. in  biophysics  and an MBA in
finance, both from New York University.

     Joshua Ruch has been a Director of the Company  since March 1998. He is the
Chairman  and Chief  Executive  Officer  of Rho  Management  Company,  Inc.,  an
international  investment  management firm which he co-founded in 1981. Prior to
founding  Rho, Mr. Ruch was employed in investment  banking at Salomon  Brothers
and Bache Halsey Stuart, Inc. in New York City. Mr. Ruch received a B.Sc. degree
in electrical engineering from the Israel Institute of Technology (Technion) and
an M.B.A. from the Harvard Business School.

         Henri A.  Termeer  has been a Director of the  Company  since  December
1996.  He has served as President  and a Director of Genzyme since October 1983,
as Chief  Executive  Officer  since  December  1985 and as Chairman of the Board
since May 1988. For ten years prior to joining Genzyme, Mr. Termeer held various
management  positions at Baxter Travenol  Laboratories,  Inc., a manufacturer of
human health care  products.  Mr. Termeer also serves on the boards of directors
of  Abiomed,   Inc.,  AutoImmune  Inc.,  GelTex  Pharmaceuticals  Inc.,  Genzyme
Transgenics  Corporation,  all  biotechnology  companies  and  is a  trustee  of
Hambrecht & Quist  Healthcare  Investors  and  Hambrecht  & Quist Life  Sciences
Investors.

     Christopher T. Walsh,  Ph.D. has been a Director of the Company since April
1997.  From 1992 to 1995,  he  served as  President  of the  Dana-Farber  Cancer
Institute.  Since 1991,  Dr.  Walsh has served as  Hamilton  Kuhn  Professor  of
Biological Chemistry and Molecular  Pharmacology at Harvard Medical School. From
1987 to 1995, he was Chairman of the Harvard Medical School Biological Chemistry
and Molecular Pharmacology Department.  Dr. Walsh received his A.B. from Harvard
University  and his Ph.D. in Life Sciences from  Rockefeller  University.  He is
also director of LeukoSite, Inc., a biotechnology company.

         Directors are elected  annually by the  stockholders of the Company and
hold  office  until the next  annual  meeting  of  stockholders  or until  their
resignation  or  removal.  Executive  officers of the Company are elected by the
Board of Directors on an annual basis and serve at the  discretion  of the Board
of  Directors.  There are no  family  relationships  among any of the  executive
officers or directors of the Company.

<PAGE>

Scientific Advisory Board

         The  Company's  scientific  advisory  board (the  "Scientific  Advisory
Board") is a  multi-disciplinary  assemblage of scientists and physicians in the
fields  of  transplantation,   immunology,  endocrinology,  neurophysiology  and
neuromuscular  physiology,  transplantation  biology and surgery. The Scientific
Advisory  Board meets  regularly to review and evaluate the  Company's  research
programs and advise the Company with respect to technical  matters.  The members
of the Scientific Advisory Board are as follows:
<TABLE>
<CAPTION>

                                             Member
Name                                         Since         Position
<S>                                          <C>           <C>

Hugh Auchincloss, Jr., M.D.                  1992          Associate Professor of Surgery, Harvard
                                                           Medical School; Director, Pancreas
                                                           Transplantation and Associate Visiting
                                                           Surgeon, Massachusetts General Hospital

Jay A. Berzofsky, M.D., Ph.D.                1992          Chief, Molecular Immunogenetics and Vaccine
                                                           Research Section, Metabolism Branch, NCI

Robert H. Brown, Jr., M.D., D.Phil.          1992          Director of Cecil B. Day Laboratory for
                                                           Muscular Research, Associate in Neurology,
                                                           Massachusetts General Hospital; Associate
                                                           Professor of Neurology, Harvard Medical School

Laurie H. Glimcher, M.D.                     1993          Professor of Immunology, Department of Cancer
                                                           Biology, Harvard School of Public Health and
                                                           Professor of Medicine, Harvard Medical School

Ronald D. McKay, Ph.D.                       1998          Chief, Laboratory of Molecular Biology,
                                                           National Institute of Neurological Disorders
                                                           and Stroke, National Institute of Health

David H. Sachs, M.D.                         1990          Director, Transplantation Biology Research
                                                           Center, Massachusetts General Hospital; Paul
                                                           S. Russell/Warner-Lambert Professor of
                                                           Surgery (Immunology), Harvard Medical School


</TABLE>

<PAGE>


                                     PART II

Item 5.  Market for Registrant's Common Stock and Related Stockholder Matters

         The  Company's  Common  Stock  and  Warrants  have  been  traded on the
National  Market tier of The Nasdaq  Stock  Market  under the  symbols  DCRN and
DCRNW,  respectively,  since August 12, 1996. The following table sets forth for
the  periods  indicated  the high and low sale  prices for the Common  Stock and
Warrants during 1997 and 1998 as reported on the Nasdaq National Market:
<TABLE>
<CAPTION>


                                                                       High                           Low
         Fiscal Year 1997 
        <S>                                                         <C>                            <C>

         Common Stock:

         First Quarter                                                16 3/4                         9 7/8

         Second Quarter                                                 14                           8 1/2

         Third Quarter                                                12 3/4                           9

         Fourth Quarter                                                 14                           8 3/4

         Warrants

         First Quarter                                                 6 1/2                         1 7/8

         Second Quarter                                                5 1/4                         2 1/4

         Third Quarter                                                 4 1/8                         2 1/2

         Fourth Quarter                                                3 7/8                         1 3/4

         Fiscal Year 1998

         Common Stock:

         First Quarter                                                11 1/2                         9 1/8

         Second Quarter                                                 10                           5 3/8

         Third Quarter                                                 7 3/8                         4 1/2

         Fourth Quarter                                                8 1/8                         4 1/4

         Warrants:

         First Quarter                                                 2 3/4                         1 7/8

         Second Quarter                                               2 5/16                         15/16

<PAGE>

         Third Quarter                                                1 1/16                          3/8

         Fourth Quarter                                                 7/8                           3/16
</TABLE>

         As of March 5, 1999 there were approximately 3,000 holders of record of
the Company's Common Stock.

         The Company has never  declared or paid cash  dividends  on its capital
stock. The Company currently intends to retain earnings,  if any, for use in its
business and does not  anticipate  declaring or paying any cash dividends in the
foreseeable future.

         The Company did not sell any equity securities during the quarter ended
December 31, 1998 that were not registered under the Securities Act.

         The  following  information  updates and  supplements  the  information
regarding use of proceeds  originally filed by Diacrin on Form SR for the period
ended May 12,  1996,  as amended to date and relates to  securities  sold by the
Company pursuant to the  Registration  Statement on Form S-2  (Registration  No:
33-80773) which was declared  effective on February 12, 1996:  Through  December
31,  1998,  the  Company  has used  approximately  $7,777,000  of the  total net
proceeds from its initial  public  offering of  $20,911,755.  Of the  $7,777,000
used,  approximately  $265,000  was  used  for the  purchase  of  machinery  and
equipment;  approximately  $582,000 was used for repayment of indebtedness;  and
approximately  $6,930,000 was used for working  capital.  The unused proceeds of
approximately  $13,134,000 are in temporary investments  consisting of corporate
notes and a money market mutual fund.  All proceeds used or invested were direct
or indirect payments to others.

Item 6.  Selected Financial Data

         The selected financial data set forth below as of December 31, 1997 and
1998 and for each of the three years in the period  ended  December 31, 1998 are
derived  from the  Company's  financial  statements  which have been  audited by
Arthur  Andersen LLP,  independent  public  accountants,  and which are included
elsewhere in this Annual Report on Form 10-K.  The selected  financial  data set
forth  below as of  December  31,  1994,  1995 and 1996 and for the years  ended
December 31, 1994 and 1995 are derived from the Company's  financial  statements
which have been audited by Arthur Andersen LLP and are not included herein.  The
data set forth below should be read in conjunction with the Company's  financial
statements,  related notes thereto and "Management's  Discussion and Analysis of
Financial Condition and Results of Operations" included elsewhere in this Annual
Report on Form 10-K.


<PAGE>



<TABLE>
<CAPTION>

                                                           Year Ended December 31,
                                    -----------------------------------------------------------------------
                                        1994           1995         1996            1997          1998
                                        ----           ----         ----            ----          ----
Statement of Operations Data:                 (in thousands, except share and per share data)
REVENUES:
<S>                                 <C>              <C>          <C>             <C>        <C>    

     Research and development        $    152         $   45       $  1,144        $ 4,763    $    3,623
     Interest income                      203            245          1,100          1,302         1,576
                                     --------         ------       --------        -------    ----------

         Total revenues                   355            290          2,244          6,065         5,199
                                     --------         ------       --------        -------    ----------

OPERATING EXPENSES:
     Research and development           4,912          4,478          5,767          6,863         7,372
     General and administrative         1,281          1,128          1,304          1,460         1,484
     Interest expense                      12            397            158             93            89
                                     --------         ------        -------        -------    ----------

         Total operating expenses       6,205          6,003          7,229          8,416         8,945
                                     --------         ------        -------        -------    ----------

         Equity in operations
         of joint venture                  -            -               -              -          (1,084)
                                     ========         ======        =======        =======    ==========

         Net loss                    $ (5,850)      $ (5,713)       $(4,985)      $ (2,351)    $  (4,830)
                                     ========         ======        =======       ========     =========                       

Net loss per common share:
         Basic and diluted           $ (16.15)      $ (15.07)       $  (.44)      $   (.18)      $  (.34)
                                     ========         ======        =======       ========       =======                       

Weighted average shares
outstanding(1):
         Basic and diluted            362,161        379,131     11,389,823      13,235,286    14,156,179
                                     ========        =======     ==========      ==========    ==========
</TABLE>

<TABLE>
<CAPTION>

                                                                          December 31,
                                    -----------------------------------------------------------------------
Balance Sheet Data:                     1994          1995          1996          1997          1998
                                    --- -----   ---   -----    ---  -----    ---  -----         ----
<S>                                  <C>            <C>            <C>          <C>            <C>  
Cash, cash equivalents
and investments                         $ 2,752      $   4,115      $ 23,482    $ 21,347        $ 26,270
Working capital                           1,603          2,753        12,413       9,551          21,812
Total assets                              3,658          5,160        24,275      22,780          27,484
Long-term debt                              493          7,550           370         672             392
Stockholders' equity (deficit)            1,840         (3,864)       22,437      20,204          24,845

- - ------------------
(1)   Computed as described in Note 2 (e)  of Notes to Financial Statements.
</TABLE>

Item 7.  Management's Discussion and Analysis of Financial Condition and
         Results of Operations

Overview

         Since its inception,  the Company has  principally  focused its efforts
and resources on research and  development of cell  transplantation  products to
treat  neurodegenerative and other human diseases.  The Company's primary source
of working  capital to fund such  activities  has been proceeds from the sale of
equity and debt securities. In addition, commencing October 1, 1996, the Company
has  received  funding  from the Joint  Venture  with  Genzyme in support of the
NeuroCell(TM)-PD and NeuroCell(TM)-HD  product development programs. The Company
has not  received  any  revenues  from the sale of products to date and does not
expect to generate  product  revenues for at least the next several  years.  The
Company has  experienced  fluctuating  operating  


<PAGE>

losses since its inception and
expects that the additional activities required to develop and commercialize the
Company's  products will result in increasing  operating losses for at least the
next several years. At December 31, 1998, the Company had an accumulated deficit
of $39.5 million.

                  In September  1996,  the Company and Genzyme  formed the Joint
Venture to develop and commercialize NeuroCell(TM)-PD and NeuroCell(TM)-HD.  The
Joint Venture is governed by a six-member  Steering  Committee  comprised of Dr.
Fraser,  Mr. Egan and Dr. Dinsmore,  two executive  officers and one employee of
the Company,  and three  employees  of Genzyme.  The  Steering  Committee  meets
regularly  and makes all of the  decisions  with respect to the Joint  Venture's
work plans and budgets.  The Steering  Committee has appointed a program manager
from each  organization  to execute the agreed  upon  product  development  work
plans.

                  For 1996 and 1997,  the  Company  expensed  all  research  and
development costs related to the Joint Venture Products incurred by it on behalf
of the Joint Venture and recognized an equal amount of research and  development
revenue due to the fact that costs  incurred  were  funded by the Joint  Venture
exclusively out of  contributions  made to it by Genzyme.  Through  December 31,
1997,  Genzyme made 100% of the total cash  contributions  to the Joint Venture.
During the first quarter of 1998, the Company began making cash contributions to
the Joint Venture equal to 25% of the Joint Venture's funding  requirements.  To
the extent the Company's  contributed  funds were used to fund expenses incurred
by Genzyme on behalf of the Joint Venture, the Company has recognized an expense
in its  statement  of  operations  captioned  "equity  in  operations  of  Joint
Venture."  Furthermore,  to the extent the Company's contributed funds were used
to fund  expenses  incurred by the Company on behalf of the Joint  Venture,  the
Company has reduced the research and development  revenue  recognized by it from
the Joint  Venture  by an amount  equal to the  Company-funded  portion  of such
expenses.

Results of Operations

Year Ended December 31, 1998 Versus Year Ended December 31, 1997

                  Research and development  revenues were approximately $3.6 and
$4.8 million for the years ended December 31, 1998 and 1997,  respectively,  and
were  comprised  entirely of revenue from the Joint  Venture.  The  reduction in
research  and  development  revenues is  attributable  to the  reduction  in the
percentage  of funding  from  Genzyme  that took effect in the first  quarter of
1998.

         Interest  income was $1.6 million for the year ended  December 31, 1998
versus $1.3 million for the year ended  December 31, 1997.  The 21% increase was
primarily due to  additional  interest  income  realized on higher cash balances
available for investment.

         Research and development  expenses were $7.4 million for the year ended
December 31, 1998 versus $6.9 million for the year ended  December 31, 1997. The
7% increase was primarily due to the production costs of clinical grade antibody
produced during the current year period for use in the Company's clinical trials
and preclinical research. The increase was, to a lesser extent, due to increased
costs related to the operation of clinical  production  facilities  completed in
the second half of 1997.

<PAGE>

     General and  administrative  expenses  of $1.5  million for the years ended
December 31, 1997 and 1998 were relatively unchanged.

         Interest  expense was $89,000 and $93,000 for the years ended  December
31, 1998 and 1997, respectively.  An increase in interest expense as a result of
the $650,000  term loan  obtained by the Company in November 1997 is offset by a
decrease in capital lease debt between the periods.

         For the twelve months ended December 31, 1998,  the Company  recorded a
$1.1 million  charge  related to its equity in operations of the Joint  Venture.
This  expense is due to funds  contributed  by the Company to the Joint  Venture
that were  used to fund  expenses  incurred  by  Genzyme  on behalf of the Joint
Venture.  This  expense  did not occur in the prior year as the  Company was not
required to make  contributions  to the Joint  Venture  until the quarter  ended
March 31, 1998.

         The Company incurred a net loss of  approximately  $4.8 million for the
year ended December 31, 1998 versus a net loss of approximately $2.4 million for
the year ended December 31, 1997.

Results of Operations

Year Ended December 31, 1997 Versus Year Ended December 31, 1996

                  Research and  development  revenues  were  approximately  $4.8
million  for the year ended  December  31, 1997 and were  comprised  entirely of
revenue  from the Joint  Venture.  Research  and  development  revenues  of $1.1
million for the year ended  December 31, 1996 were  comprised of $1.0 million in
revenue  received from the Joint Venture and $100,000  received under a research
grant.

         Interest  income was $1.3 million for the year ended  December 31, 1997
versus $1.1 million for the year ended  December 31, 1996.  The 18% increase was
primarily due to  additional  interest  income  realized on higher cash balances
available for investment.

         Research and development  expenses were $6.9 million for the year ended
December  31, 1997 versus $5.8  million for the year ended  December  31,  1996.
Almost half of the 19% increase in research and development  expenses was due to
increases in staffing.  The increase in staffing was primarily due to additional
clinical  affairs  personnel  necessary to support the Joint Venture's  clinical
trials  and,  to  a  lesser  extent,  to  additional  quality  control/assurance
personnel necessary to support expanded clinical production facilities completed
during 1997.  Research  personnel  was also  increased  to expand the  Company's
preclinical  research  program  efforts.  A smaller  portion of the  increase in
research and  development  expenses  between years was due to costs  incurred in
1997 in the validation and operation of clinical production facilities completed
during 1997. In addition,  the Company  expensed  approximately  $230,000 during
1997 for the development and conduct of PERV tests.

         General  and  administrative  expenses  were $1.5  million for the year
ended  December  31, 1997 versus $1.3  million for the year ended  December  31,
1996.  The 12%  increase  was  


<PAGE>

primarily  due to an increase  in  administrative
personnel as well as increased costs of shareholder relations.

         Interest  expense  was  $93,000  for the year ended  December  31, 1997
versus $158,000 for the year ended December 31, 1996. The decrease was primarily
attributable  to  interest  expense  recognized  during  the 1996  period on the
Company's  $7.0 million of  Convertible  Notes which were issued in May 1995 and
converted  to common  stock upon the  closing of the  Company's  initial  public
offering.

         The Company incurred a net loss of  approximately  $2.4 million for the
year ended December 31, 1997 versus a net loss of approximately $5.0 million for
the year ended December 31, 1996.

Liquidity and Capital Resources

         The Company has financed its activities primarily with the net proceeds
from its pre-1998  equity  offerings  aggregating  $53.6  million,  with the net
proceeds of approximately  $9.4 million from the Company's  private placement of
common stock completed in February 1998, and with interest  earned  thereon.  In
addition,  the Company has recorded  approximately  $9.4 million in revenue from
the Joint Venture since it commenced  October 1, 1996. At December 31, 1998, the
Company had cash and cash  equivalents,  short-term  investments  and  long-term
investments aggregating approximately $26.3 million.

         The  Company  has  purchased  approximately  $2.3  million  of  capital
equipment since inception.  In November 1997, the Company  borrowed  $650,000 at
the Prime Rate +.5% (8.25% at December 31,  1998) under an  unsecured  five-year
term loan with a bank to finance  production  equipment acquired during 1997. In
December 1994, approximately $805,000 of capital equipment was sold for proceeds
of $600,000 and  subsequently  leased back over a four-year  term.  In addition,
approximately  $227,000 of capital  equipment  was sold in 1995 for its original
cost and  subsequently  leased  back over a four-year  term.  The Company had no
material commitments for capital expenditures as of December 31, 1998.

         Under the joint venture agreement with Genzyme,  the Company's two lead
product development programs,  NeuroCell(TM)-PD for the treatment of Parkinson's
disease and  NeuroCell(TM)-HD  for the treatment of  Huntington's  disease,  are
being  developed by the Joint Venture.  Both Genzyme and Diacrin are responsible
for funding the Joint Venture in accordance  with the terms,  and subject to the
conditions,  of the joint venture agreement.  Genzyme agreed to fund 100% of the
first $10 million of  development  and  commercialization  costs  incurred after
October  1,  1996,  75%  of the  next  $40  million  and  50%  of all  remaining
development and commercialization  costs in excess of $50 million. After Genzyme
funds the first $10 million,  the Company is responsible  for funding 25% of the
next $40  million  and 50% of all  development  and  commercialization  costs in
excess  of $50  million.  As of  December  31,  1998,  Genzyme  has  contributed
approximately  $15.7 million to the Joint Venture.  The Company's  obligation to
fund 25% of the  program  costs  commenced  in the first  quarter  of 1998.  The
Company  expects  that the  Joint  Venture's  1999  product  development  plans,
together  with the  Company's  continued  funding  of the  Joint  Venture,  will
significantly  increase the Company's net loss and cash and investments  used in
1999 as compared with 1998.

<PAGE>

         Genzyme  agreed to make  financing  available to Diacrin from and after
the date that Genzyme provides the initial $10.0 million of funding to the Joint
Venture. Genzyme agreed to make available to Diacrin an unsecured,  subordinated
line of credit  (the  "Line")  of up to an  aggregate  amount of $10.0  million.
Diacrin  may draw on the Line only in the  event  that  Diacrin's  cash and cash
equivalents  are  insufficient  to  fund  Diacrin's  budgeted  operations  for a
specified  period of time,  and the funds  may be used by  Diacrin  only to fund
capital  contributions to the Joint Venture.  The Line will be available through
the date five years  after the date  Diacrin  first  draws on the Line,  and all
outstanding  principal  and  interest  will  be due on that  fifth  anniversary.
Advances will be interest-bearing, evidenced by a promissory note and subject to
other considerations; and the aggregate amount of draws in any calendar year may
not exceed $5.0  million.  Diacrin did not make any draws on the Line during the
year ended December 31, 1998.

         The Company  believes that its existing  funds,  together with expected
future  funding  under  the  Joint  Venture  agreement  with  Genzyme,  will  be
sufficient to fund its operating expenses and capital  requirements as currently
planned through at least 2000. However, the Company's cash requirements may vary
materially   from  those  now  planned   because  of  results  of  research  and
development,  the scope and results of  preclinical  and clinical  testing,  any
termination of the Joint Venture, relationships with strategic partners, changes
in the focus and direction of the Company's  research and development  programs,
competitive and technological advances, the FDA's regulatory process, the market
acceptance of any approved Company products and other factors.

         The Company expects to incur substantial  additional  costs,  including
costs  related to  ongoing  research  and  development  activities,  preclinical
studies,  clinical  trials,  establishing  pig production  capabilities  and the
expansion of its laboratory and administrative  activities.  Therefore, in order
to achieve  commercialization  of its potential products,  the Company will need
substantial additional funds. There can be no assurance that the Company will be
able to obtain the additional  funding that it will require on acceptable terms,
if at all.

Impact of the Year 2000 Issue

         The Company is in the process of completing its assessment of Year 2000
issues and their  potential  impact on its  information  systems  and  business.
Generally,  the  Company has  potential  Year 2000  exposure in four areas:  (i)
financial and management operating computer systems used to manage the Company's
business,  (ii) operating  computer  systems used in the Company's  research and
product  development  laboratories,  (iii)  microprocessors and other electronic
equipment used by the Company  ("embedded chips") and (iv) computer systems used
by third  parties,  in particular  financial  institutions  and suppliers of the
Company.

         At December 31, 1998,  the Company had completed its  assessment of its
financial and management  operating computer systems and has identified software
that is not Year 2000 compliant.  The Company  estimates the cost to update this
software,  through the purchase of an off-the-shelf  software package,  together
with hardware and network server  software,  will be  approximately  $8,000.  At
December 31, 1998,  the Company had spent  approximately  $5,000 in this effort.
The Company is  substantially  complete  with its update of the systems that are
not Year 2000 compliant.

<PAGE>

         At December 31, 1998,  the Company had also completed its assessment of
its Year 2000  exposure to  operating  computer  systems  used in the  Company's
research and development  laboratories  and embedded chips in its facilities and
equipment  used  in  its   facilities.   The  Company  has  not  identified  any
non-compliant  systems that play a significant  role in the Company's  research,
product development or facilities management.

         The Company continues to interview  financial  institutions and vendors
to determine  their exposure to year 2000 issues,  their  anticipated  risks and
responses to those  risks.  To date,  the Company has not  obtained  information
suggesting any critical  vendors or financial  institutions  will not be able to
service or supply the Company on or after January 1, 2000.

         If  the  Company  is   unsuccessful   in  completing   remediation   of
non-compliant  systems,  or if any of the  Company's  third party  suppliers and
partners do not timely complete their remediation programs, additional costs may
be incurred to develop  alternative  methods of managing the effected aspects of
the Company's  business.  In addition,  the Company's  clinical and  preclinical
trials  for  all of its  product  candidates  could  be  delayed.  Based  on the
information  currently  available  to the  Company,  Year  2000  issues  are not
expected  to have a  significant  impact on the  Company's  ongoing  results  of
operations.  Accordingly,  the Company has not developed a contingency  plan but
will do so in the future if necessary.


Certain Factors That May Affect Future Results

         The  following  important  factors,  among  others,  could cause actual
results to differ materially from those contained in forward-looking  statements
made in this Annual  Report on Form 10-K or presented  elsewhere  by  management
from time to time. Note that, except where the context otherwise  requires,  all
references to the Company's products are inclusive of the Joint Venture Products
being developed in the Joint Venture.

Reliance on Joint Venture with Genzyme Corporation

         The  Company  and  Genzyme  are  parties to a joint  venture  agreement
relating  to the  development  and  commercialization  of  NeuroCell(TM)-PD  and
NeuroCell(TM)-HD,  the Company's  most advanced  product  candidates.  Under the
agreement,  Genzyme  has  agreed to  provide  the first $10  million  of product
development and commercialization funding required after October 1, 1996 for the
Joint  Venture  Products,  75% of the next $40  million  of  funding  and 50% of
funding thereafter. In addition, Genzyme has agreed to market and sell the Joint
Venture Products on behalf of the Joint Venture.  Furthermore, the Joint Venture
plans to  manufacture  the Joint Venture  Products in  facilities  controlled by
Genzyme.

         Genzyme has the right to terminate the joint venture agreement, without
cause, upon 180 days notice to Diacrin.  In the event of such  termination,  the
Company (i) would lose a significant source of funding for the  NeuroCell(TM)-PD
and the NeuroCell(TM)-HD product development programs, (ii) would lose access to
Genzyme's   experienced   sales,   marketing,   development  and   manufacturing
organizations,  and (iii) would need to establish clinical production facilities
for the production of the Joint Venture Products. There can be no assurance that
the  Company  would be able to  complete  development  or  commercialization  of
NeuroCell(TM)-PD  and  NeuroCell(TM)-HD  if Genzyme terminated the joint venture
agreement.

<PAGE>

         In  addition,  under  certain  circumstances,  Genzyme has the right to
terminate the joint venture agreement  following an unremedied breach by Diacrin
of any material term of the agreement. In the event of such termination, Genzyme
has the option to obtain an  exclusive,  worldwide,  royalty-bearing  license to
certain Diacrin technology  required to manufacture and market the Joint Venture
Products.  If Genzyme  exercised  its option,  the Company  would be entitled to
receive a royalty on the net sales of the Joint Venture Products,  which royalty
may be significantly  less than amounts the Company would be entitled to receive
under the 50%/50% profit split agreed to as part of the joint venture agreement.

         Any termination of the joint venture  agreement,  whether by Genzyme or
Diacrin, could have a material adverse effect on the Company's business, results
of operations or financial position. In addition, there can be no assurance that
the economic and other interests of the Company and Genzyme will coincide during
the term of the joint  venture  agreement or that  disagreements  will not occur
between  the Company and  Genzyme  during the term of the  agreement,  either of
which could have a material adverse effect on the Company's business, results of
operations or financial position. See "Dependence on Others."

Reliance on Cell  Transplantation  Technology;  No  Currently  Approved  
Xenotransplantation-Based  Products;  PERV Testing

         Diacrin has concentrated  its efforts and therapeutic  product research
on its cell  transplantation  technology and will be dependent on the successful
development of the technology.  Cell  transplantation  technology is an emerging
technology  with,  as  yet,  limited  clinical  applications.  There  can  be no
assurance that the Company's cell transplantation  technology will result in the
development  of any  therapeutic  products.  If it does not,  the Company may be
required  to  change  dramatically  the  scope  and  direction  of  its  product
development activities.

         The   Company's   approach   involves    xenotransplantation   --   the
transplantation  of cells  from  one  species  into  another.  Although  several
companies  are  focusing  on  this  area,   xenotransplantation-based   products
represent  a  novel  therapeutic  approach  that  has not yet  been  subject  to
extensive clinical testing.  Xenotransplantation  also poses a risk that viruses
or other animal pathogens may be unintentionally transmitted to a human patient.
The Company has been  required by the FDA to perform  certain tests to determine
whether PERV is present in patients  that have  received  porcine  cells.  These
tests  have  been   performed  on  samples  from   patients  who  have  received
NeuroCell(TM)-PD, NeuroCell(TM)-HD and NeuroCell(TM)-FE and no PERV was detected
in these  samples.  The  Company  has also been  required  by the FDA to perform
additional  tests on porcine  neural cells to determine  if  infectious  PERV is
present.  These tests have been performed and no PERV was detected.  The Company
has been required by the FDA to develop an additional  test for the detection of
PERV and has been instructed to routinely  monitor patient blood samples for the
presence of PERV. If PERV is detected in this test or samples,  additional tests
may be  required  to assess  the risk to  patients  of PERV  infection.  If such
additional tests are required, trials of the Company's porcine cell products may
be delayed.  While PERV has not been shown to cause any  disease in pigs,  it is
not known what effect,  if any, PERV may have on humans.  The Company's  porcine
cell product development  programs would be negatively impacted by the detection
of infectious PERV in porcine cells or 


<PAGE>

clinical trial subjects.  An inability to
proceed with further trials or a substantial  delay in the clinical trials would
have a material adverse effect on the Company.

         No xenotransplantation-based  therapeutic product has been approved for
sale  by the  FDA.  The  FDA  has  not  yet  established  definitive  regulatory
guidelines for xenotransplantation, but has proposed guidelines in an attempt to
reduce  the  risk  of  contamination  of  transplanted  cellular  products  with
infectious  agents.  Diacrin has provided the FDA with a written response to the
proposed  guidelines,  however,  there can be no assurance that such  guidelines
will be issued,  or that  Diacrin  will be able to comply with final  guidelines
that may be issued.  Furthermore,  there can be no  assurance  that any products
developed  and  tested by  Diacrin  will be  approved  by the FDA or  regulatory
authorities  in other  countries,  or that  xenotransplantation-based  products,
including  the  Company's  product  candidates,  will be accepted by the medical
community or third-party  payers or that the degree of acceptance will not limit
the size of the market for such products.

History of Operating Losses; No Assurance of Revenue or Operating Profit

         The  Company  has  generated  no revenue  from  product  sales to date.
Diacrin has accumulated  net losses from its inception in 1989 through  December
31, 1998 of approximately $39.5 million, and losses are continuing.  The Company
expects to incur substantial  operating losses for the foreseeable  future.  The
Company expects that the Joint Venture's 1999 product development plans together
with the Company's  continued  funding of the Joint  Venture will  significantly
increase  the  Company's  net  loss and  cash  and  investments  used in 1999 as
compared with 1998.  The Company  currently  has no material  sources of revenue
from product sales or license fees,  and there can be no assurance  that it will
be able to develop  such  revenue  sources or that its  operations  will  become
profitable, even if it is able to commercialize any products.

Lack of Commercial Products; No Assurance of Successful Product Development

         The Company has no products  available  for sale and does not expect to
have any  therapeutic  products  commercially  available  for at least  the next
several  years,  if at  all.  The  Company's  potential  products  will  require
significant additional development, preclinical and clinical testing, regulatory
approval and additional  investment  prior to  commercialization.  The Company's
potential  therapeutic  products are at early stages of research and development
and  the  Company's  growth  will  depend  on  the  successful  development  and
commercialization  of its  products.  There  can be no  assurance  that any such
potential  products  will  be  successfully  developed,  prove  to be  safe  and
efficacious in clinical trials, meet applicable regulatory standards, be capable
of  being  produced  in  commercial   quantities  at  acceptable   costs  or  be
successfully marketed.

Need for Substantial Additional Funds

         The  Company  will  require  substantial  additional  funding  for  its
research  and product  development  programs  and  operating  expenses,  and for
pursuing regulatory  clearances and building production  capabilities.  Adequate
funds for these purposes,  whether  obtained  through equity or debt financings,
collaborative  or other  arrangements  with  corporate  partners  or from  other
sources, may not be available when needed or on terms acceptable to the Company.

<PAGE>

Insufficient  funds may require the  Company to delay,  scale back or  eliminate
certain  of  its  product   development   programs  or  to  license   others  to
commercialize  products or technologies that the Company would otherwise seek to
develop and  commercialize  itself,  any of which would have a material  adverse
effect on the Company.

Uncertainty Associated with Preclinical and Clinical Testing

         Before obtaining regulatory approvals for the commercial sale of any of
the Company's  potential  products,  the products will be subjected to extensive
preclinical  and clinical  testing to  demonstrate  their safety and efficacy in
humans. To date, approximately 37 patients have been enrolled in clinical trials
of NeuroCell(TM)-PD,  NeuroCell(TM)-HD and NeuroCell(TM)-FE.  Results of initial
preclinical  and clinical  testing of products under  development by the Company
are not necessarily  predictive of results that will be obtained from subsequent
or more extensive preclinical and clinical testing. Furthermore, there can be no
assurance that clinical trials of products under  development  will  demonstrate
the safety and  efficacy of such  products at all or to the extent  necessary to
obtain  regulatory  approvals.  Companies  in the  biotechnology  industry  have
suffered  significant setbacks in advanced clinical trials, even after promising
results in earlier trials. The failure to adequately  demonstrate the safety and
efficacy  of a  therapeutic  product  under  development  could delay or prevent
regulatory  approval of the product and would have a material  adverse effect on
the Company.

         The rate of  completion  of clinical  trials is dependent  upon,  among
other factors, the enrollment of patients. Patient accrual is a function of many
factors, including the size of the patient population, the proximity of patients
to clinical sites,  the eligibility  criteria for the study and the existence of
competitive  clinical  trials.  Delays  in  planned  patient  enrollment  in the
Company's  current  clinical  trial or  future  clinical  trials  may  result in
increased  costs,  program delays or both,  which could have a material  adverse
effect on the Company.

No Assurance of FDA Approval; Government Regulation

         The FDA and comparable  government agencies in foreign countries impose
substantial  regulations  on the  manufacture  and  marketing of  pharmaceutical
products   through  lengthy  and  detailed   laboratory  and  clinical   testing
procedures,  sampling activities and other costly and time-consuming procedures.
Satisfaction  of these  regulations  typically  takes  several years or more and
varies substantially based upon the type, complexity and novelty of the proposed
product.  The Company cannot yet  accurately  predict when it might first submit
any PLA or BLA for FDA or other regulatory approval.

         The effect of government  regulation  may be to delay  marketing of new
products for a  considerable  or  indefinite  period of time,  to impose  costly
procedures  upon the  Company's  activities  or to  diminish  or  eliminate  any
competitive  advantage the Company may enjoy. There can be no assurance that FDA
or other regulatory  approval for any products  developed by the Company will be
granted on a timely basis, if at all. Any such delay in obtaining, or failure to
obtain,  such approvals  could  adversely  affect the marketing of the Company's
products and the ability to generate product revenue.  The extent of potentially
adverse  government  regulation  which might arise from  future  legislation  or
administrative action cannot be predicted.

<PAGE>

         If regulatory  approval of a product is obtained,  such approval may be
conditioned  upon  limitations and restrictions on the product use. In addition,
any marketed product and its manufacturer are subject to continuing governmental
review and any subsequent  discovery of previously  unrecognized  problems could
result in  restrictions  on the  product  or  manufacturer,  including,  without
limitation, withdrawal of the product from the market. Failure of the Company to
comply with applicable  regulatory  requirements can, among other things, result
in fines,  suspension  of  regulatory  approvals,  product  recalls,  seizure of
products, operating restrictions or civil or criminal prosecution.

         Additionally,  the Company is or may become subject to various federal,
state and local laws,  regulations and recommendations  relating to safe working
conditions,  laboratory and  manufacturing  practices,  the  experimental use of
animals  and  the  use  and  disposal  of  hazardous  or  potentially  hazardous
substances,  including radioactive compounds and infectious disease agents, used
in connection with the Company's  research and development  work. The Company is
unable  to  predict  the  extent  of  restrictions  that  might  arise  from any
governmental or administrative  action.  There can also be no assurance that the
Company  will  not be  required  to  incur  significant  costs  to  comply  with
environmental  laws and  regulations,  or any  assurance  that  the  operations,
business or assets of the Company will not be materially  adversely  affected by
current or future environmental laws or regulations.

Rapid Technological Changes; Competition

         The Company is engaged in  activities in the  biopharmaceutical  field,
which is  characterized by extensive  research  efforts and rapid  technological
progress.  There can be no  assurance  that  research and  discoveries  by other
biotechnology or pharmaceutical companies will not render the Company's programs
or products uneconomical,  result in therapies superior to any therapy developed
by the Company or that any  products  developed by the Company will be preferred
to any existing or newly-developed technologies.

         The  biotechnology and  pharmaceutical  industries are characterized by
intense  competition.  The Company competes against numerous companies,  many of
which have substantially greater financial and other resources than the Company.
Several such enterprises have initiated cell  transplantation  research programs
and/or  efforts  to treat the same  diseases  targeted  by the  Company  through
alternate  technologies.  These competitive  enterprises have devoted,  and will
continue  to  devote,   substantial   resources  to  the   development  of  cell
transplantation  or other  products to treat such  diseases.  Private and public
academic and research institutions also compete with Diacrin in the research and
development of human therapeutic products.

         In  addition,  many of the  Company's  competitors  have  significantly
greater  experience  than the Company in preclinical  testing and human clinical
trials of  biotechnology  and  pharmaceutical  products and in obtaining FDA and
other regulatory approvals of products.  Accordingly,  the Company's competitors
may succeed in obtaining FDA approval for products  more rapidly or  effectively
than the Company. If the Company commences  significant  commercial sales of its
products, it will also be competing with respect to manufacturing efficiency and
sales and marketing capabilities, areas in which it has no experience.

Limited Regulatory, Manufacturing, Marketing and Sales Capabilities

<PAGE>

         The  Company  has  not  yet  invested   significantly   in  regulatory,
manufacturing,  marketing, distribution or product sales resources. To date, the
Company  has  relied on others for the  supply  and  production  of pigs for its
clinical  programs.   Although  the  Company  intends  to  develop   regulatory,
manufacturing,  marketing, distribution and sales resources in the future, there
can be no  assurance  that the Company  will be able to develop  such  resources
successfully.

Uncertain Ability to Protect Proprietary Technology; Reliance Upon Licenses

         The  biotechnology  and  pharmaceutical  industries place  considerable
importance on obtaining patent and trade secret protection for new technologies,
products and  processes.  The  Company's  success will depend,  in part,  on its
ability to obtain patent protection for its products, preserve its trade secrets
and operate without infringing the proprietary rights of others. The Company has
ongoing  research  efforts and expects to seek additional  patents covering this
research in the future.  There can be no assurance of its success or  timeliness
in obtaining  any patents,  or of the breadth or degree of  protection  that any
such patents will afford the Company.

         The patent position of biotechnology products is often highly uncertain
and  usually  involves  complex  legal and  factual  questions.  There can be no
assurance that patent applications  relating to the Company's potential products
or technology will result in additional patents being issued or that, if issued,
such  patents  will  afford  adequate  protection  to  the  Company  or  not  be
challenged,  invalidated  or infringed.  Furthermore,  there can be no assurance
that others will not  independently  develop  similar  products  and  processes,
duplicate  any of the  Company's  products  or,  if  patents  are  issued to the
Company,  design  around such  patents.  In  addition,  the Company  could incur
substantial costs in defending itself in suits brought against it or in suits in
which it may assert  its  patents  against  others.  If the  outcome of any such
litigation is unfavorable,  the Company's business could be adversely  affected.
To  determine  the  priority  of  inventions,  the  Company  may  also  have  to
participate in interference proceedings declared by the United States Patent and
Trademark Office, which could result in substantial cost to the Company.

         Much of the Company's  know-how and  technology is not  patentable.  To
protect its rights, the Company requires  employees,  consultants,  advisors and
collaborators to enter into confidentiality  agreements with Diacrin.  There can
be  no  assurance,  however,  that  these  agreements  will  provide  meaningful
protection  for the  Company's  trade  secrets,  know-how  or other  proprietary
information in the event of any unauthorized use or disclosure.  Further, in the
absence of patent  protection,  the Company's business may be adversely affected
by competitors who independently develop substantially equivalent technology.

Uncertain Availability of Third-Party Reimbursement and Product Pricing

         The  Company's  ability to  commercialize  products  successfully  will
depend  substantially on reimbursement of the costs of such products and related
treatments at acceptable  levels from  government  authorities,  private  health
insurers  and  other  organizations,  such as health  maintenance  organizations
("HMOs").  There can be no assurance that  reimbursement in the United States or
foreign countries will be available for any products the Company may develop or,
if available, will not be decreased in the future, or that reimbursement amounts
will not reduce the demand for, or the price of, the Company's products, thereby
adversely affecting the Company's business.

<PAGE>

         Third-party payers are increasingly  challenging the prices charged for
medical products and services. Also, the trend toward managed health care in the
United States and the concurrent  growth of  organizations,  such as HMOs, which
can control or significantly  influence the purchase of health care services and
products,  as well as  legislative  proposals  to reform  health  care or reduce
government  insurance  programs,  may  result in lower  prices  for  therapeutic
products.   The  cost  containment  measures  that  health  care  providers  are
instituting,  including practice protocols and guidelines and clinical pathways,
and the effect of any health care reform,  could materially adversely affect the
Company's  ability to sell its products if successfully  developed and approved.
Moreover,  the  Company  is unable to predict  what  additional  legislation  or
regulation, if any, relating to the health care industry or third-party coverage
and  reimbursement  may be enacted in the future or what effect such legislation
or regulation would have on the Company's business.

Dependence on Key Personnel

         Because  of the  specialized  nature of its  business,  the  Company is
highly dependent on its ability to attract and retain  qualified  scientific and
technical  personnel for the research and  development  activities  conducted or
sponsored by the Company.  The loss of certain key executive  officers  could be
significantly  detrimental to the Company.  Recruiting  and retaining  qualified
scientific personnel to perform research and development work is critical to the
Company's success. In addition,  the Company's  anticipated growth and expansion
into areas and  activities  requiring  additional  expertise,  such as  clinical
testing,  regulatory compliance,  manufacturing and marketing,  will require the
addition of new management personnel and the development of additional expertise
by existing  management  personnel.  There is intense  competition for qualified
personnel  in the  areas  of  the  Company's  activities,  and  there  can be no
assurance  that the  Company  will be able to continue to attract and retain the
qualified personnel  necessary for the development of its business.  The failure
to  attract  and  retain  such  personnel  or to develop  such  expertise  would
adversely affect the Company's business.

Dependence on Others

         The Company's  strategy for  development and  commercialization  of its
product candidates  entails entering into arrangements with corporate  partners,
collaborators,  licensees  and others and upon the  subsequent  success of these
third parties in performing their  obligations,  including,  as the case may be,
any or all of preclinical and clinical testing,  obtaining regulatory approvals,
manufacturing and marketing.  There can be no assurance that the Company will be
able to maintain its existing arrangements or establish additional collaborative
arrangements on favorable terms, if at all. If the Company is able to enter into
any  additional  arrangements,  such  arrangements  may  require  the Company to
transfer certain material rights to third parties.

         There  can  be  no  assurance   that  any  such   corporate   partners,
collaborators, licensees or others will perform their obligations as expected or
that the Company  will derive any revenue or profit from any  existing or future
arrangements. While the Company believes its partners, collaborators,  licensees
and others  will have an  economic  motivation  to succeed in  performing  their
contractual  responsibilities,  the amount and timing of resources to be devoted
by such parties is not within the control of the Company. Furthermore, there can
be no assurance  that the interest of the Company  will  coincide  with those of
such other  parties or that  disagreements  over 


<PAGE>

rights to  technology  or other
proprietary  information  or other  matters will not occur.  In addition,  it is
possible  that  such  other  parties  will  be  independently  involved  in  the
development  of products  that may be  competitive  with the  products  they are
developing in collaboration with the Company.  If any of the Company's partners,
collaborators, licensees or others breaches or terminates its agreement with the
Company  or  otherwise  fails to conduct  its  required  activities  in a timely
manner, the development or commercialization of the product candidate under such
collaborative agreement may be delayed, the Company may be required to undertake
unforeseen additional responsibilities or devote unforeseen additional resources
to   such   development   or    commercialization   or   such   development   or
commercialization could be terminated. Any such event could adversely effect the
Company's business, results of operations or financial position.

Potential Product Liability; Limited Product Liability Insurance

         The testing, marketing and sale of human health care products entail an
inherent risk of product  liability  claims,  and there can be no assurance that
substantial  product  liability claims will not be asserted against the Company.
The Company has limited product liability insurance and may need to increase its
coverage as it expands human clinical trials and if and when it begins to market
products.  There can be no assurance  that adequate  insurance  coverage will be
available on  acceptable  terms,  if at all, or that a product  liability  claim
would not materially adversely affect the business or financial condition of the
Company.

Item 7A.Quantitative and Qualitative Disclosures About Market Risk

         The Company owns  financial  instruments  that are  sensitive to market
risks as part of its investment  portfolio.  The investment portfolio is used to
preserve  the  Company's  capital  until  it is  required  to  fund  operations,
including  the  Company's  research and  development  activities.  None of these
market-risk  sensitive  instruments are held for trading  purposes.  The Company
does not own derivative financial instruments in its investment  portfolio.  The
investment  portfolio  contains  instruments  that are  subject to the risk of a
decline in interest rates.

         Interest  Rate  Risk--The  Company's   investment   portfolio  includes
investment  grade debt  instruments.  These bonds are  subject to interest  rate
risk, and could decline in value if interest rates  fluctuate.  Due to the short
duration  and  conservative  nature of these  instruments,  the Company does not
believe that it has a material exposure to interest rate risk.

Item 8.  Financial Statements

         The financial statements required to be filed hereunder are filed as an
exhibit hereto,  are listed under item 14(a)(1) and are  incorporated  herein by
reference.

Item 9.  Changes in and Disagreements on Accounting and Financial Disclosure

         There have been no disagreements on accounting and financial disclosure
matters.

<PAGE>




                                    PART III

Item 10 - 13.

         The  information  required  for Part III of this Annual  Report on Form
10-K  is  hereby  incorporated  by  reference  from  portions  of the  Company's
definitive  proxy statement  relating to the 1999 annual meeting of stockholders
of the Company, which statement will be filed with the Commission not later than
120 days after the end of the Company's 1998 fiscal year. Such  information will
be  contained  in the sections of such proxy  statement  captioned  "Election of
Directors,"  "Meetings  of  Board  of  Directors  and  Committees,"   "Executive
Compensation,"  "Certain Relationships and Related Transactions," "Section 16(a)
Beneficial Ownership Reporting Compliance,"  "Compensation  Committee Interlocks
and Insider Participation," and "Principal Stockholders."  Information regarding
executive  officers of the Company is furnished in Part I of this Annual  Report
on Form 10-K under the heading, "Executive Officers of the Registrant."


<PAGE>



                                     PART IV

Item 14. Exhibits, Financial Statements and Reports on Form 8-K

       (a) (1)  Index to Financial Statements

      The following  Financial  Statements are included in this Annual Report on
Form 10-K.
<TABLE>
<CAPTION>

                    Financial Statements:                                                            Page

            (a.)    Diacrin, Inc.
                 <S>     <C>                                                                         <C>    
 
                  1.      Report of Independent Public Accountants                                     F-1

                  2.      Balance Sheets as of December 31, 1997 and 1998                              F-2

                  3.      Statements of Operations for each of the three years in the period
                          ended December 31, 1998                                                      F-3

                  4.      Statements of Stockholders'  Equity (Deficit) for each
                          of the three years in the period  ended  December  31,
                          1998 F-4

                  5.      Statements of Cash Flow for each of the three years in the period
                          ended December 31, 1998                                                      F-5

                  6.      Notes to Financial Statements                                                F-6

            (b.)    Diacrin/Genzyme LLC (A Development Stage Enterprise)

                  1.      Report of Independent Public Accountants                                    F-17

                  2.      Balance Sheet as of December 31, 1998                                       F-18

                  3.      Statements of Operations for the year ended December 31, 1998 and
                          for the period from October 1, 1996 (date of inception) to December         F-19
                          31, 1998

                  4.      Statements  of Cash Flows for the year ended  December
                          31, 1998 and for the period from October 1, 1996 (date
                          of inception) to December 31, 1998                                          F-20

                  5.      Statements of Change in Venturers'  Capital  (deficit)
                          for  the  period   from   October  1,  1996  (date  of
                          inception) to December 31, 1998                                             F-21

                  6.      Notes to Financial Statements                                               F-22


</TABLE>
<PAGE>

(2)      Exhibits

         The following is a list of exhibits filed as part of this Annual Report
on Form 10-K:
<TABLE>
<CAPTION>

  Exhibit No.                                          Title                                       Page
- - ----------------- --- ------------------------------------------------------------------------ -------------
   <S>               <C>                                                                              <C>  

      3.1         -   Amended and Restated Certificate of Incorporation of the Company as
                      amended to date                                                                   (7)

      3.2         -   Amended and Restated By-laws of the Company                                       (6)

    +10.1         -   Research and License Agreement effective as of October 1, 1989 by and
                      among the Company and The General Hospital Corporation, as amended
                      effective as of February 1, 1991                                                  (2)

   ++10.2         -   Employment Agreement dated February 6, 1990 by and between the Company
                      and Dr. Thomas H. Fraser                                                          (2)

     10.3         -   Rights Agreement dated July 29, 1991 by and among the Company and the
                      holders of the preferred stock as amended on September 27, 1991
                                                                                                        (2)
     10.3(a)      -   Consent and Agreement to Amend dated April 26, 1995 by and among the
                      Registrant and certain investors named therein
                                                                                                        (1)
     10.3(b)      -   Consent and Agreement to Amend dated as of January 4, 1996 by and
                      among the Registrant and certain investors named therein
                                                                                                        (6)
     10.4         -   Warrant Agreement dated November 14, 1991 by and between Diacrin, Inc.
                      and American Stock Transfer & Trust Company, as Warrant Agent
                                                                                                        (2)
     10.4(a)      -   Supplement No. 1 to Warrant Agreement dated November 14, 1991, dated
                      April 24, 1995, by and between the Registrant and American Stock
                      Transfer & Trust Company, as Warrant Agent
                                                                                                        (1)
   ++10.5         -   1990 Stock Option Plan, as amended                                                (3)

     10.6         -   Sublease dated January 24, 1991 by and among the Company and Building
                      79 Associated Limited Partnership and Building 96 Associates Limited
                      Partnership                                                                       (2)

    +10.7         -   Letter Agreement dated December 10, 1993 between the Company and The
                      General Hospital Corporation                                                      (4)
<PAGE>

  Exhibit No.                                          Title                                       Page
- - ----------------- --- ------------------------------------------------------------------------ -------------
   ++10.8         -   1994 Directors' Stock Option Plan, as amended                                     (9)

     10.9         -   Master Lease Agreement, dated December 22, 1994, between the Company
                      and Aberlyn Capital Management Limited Partnership
                                                                                                        (5)
     10.10        -   Agreement to Issue Warrant between the Company and Aberlyn Capital
                      Management Limited Partnership dated December 22, 1994, including
                      Common Stock Purchase Warrant and Registration Rights Agreement
                                                                                                        (5)
     10.10(a)     -   Waiver and Consent Agreement dated April 24, 1995 by and
                      between  the  Registrant  and Aberlyn  Capital  Management
                      Limited Partnership
                                                                                                        (1)
     10.11        -   Registration Rights Agreements dated May 31, 1995 by and among the
                      Registrant and the investors listed on Schedules I and II attached
                      thereto                                                                           (1)

     10.11(a)     -   Amendment No. 1 to Registration Rights Agreement dated as of January
                      4, 1996 by and among the Registrant and certain investors named therein
                                                                                                        (6)
     10.12        -   Unit and Warrant  Agreement  dated  February 12, 1996 by
                      and between the  Registrant  and American Stock Transfer &
                      Trust Company
                                                                                                        (7)
    +10.13        -   Collaboration Agreement among Diacrin, Inc., Genzyme Corporation and
                      Diacrin/Genzyme, LLC dated as of October 1, 1996
                                                                                                        (8)
    +10.14        -   Operating Agreement of Diacrin/Genzyme LLC                                        (8)

   ++10.15        -   1997 Stock Option Plan                                                           (10)

     10.16        -   $650,000 Promissory Note dated November 25, 1997 made by the
                      Registrant to the order of Fleet National Bank                                   (11)

     10.16(a)     -   Letter Agreement dated November 25, 1997 by and between the Registrant
                      and Fleet National Bank                                                          (11)
                                                                                                       
     21           -   Subsidiaries                                                                       *

     23.1         -   Consent of Arthur Andersen LLP                                                     *

     23.2         -   Consent of PricewaterhouseCoopers LLP                                              *

     27           -   Financial Data Schedule                                                            *
</TABLE>
<PAGE>

       (b)      Reports on Form 8-K.

         No current  reports on Form 8-K were  filed by the  Company  during the
last quarter of the period covered by this report.

       (c)      Description of Exhibits.

                See Item 14 (a)



       (d)      Description of Financial Statement Schedules.

                None.

<PAGE>


  *    Filed herewith

(1)  Filed as an exhibit to the  Company's  Quarterly  Report on Form 10-Q (File
     No. 0-20139) for the quarter ended June 30, 1995 and incorporated herein by
     reference.

(2)  Filed  as an  exhibit  to the  Company's  Form 10,  as  amended  (File  No.
     0-20139), on April 29, 1992, and incorporated herein by reference.

(3)  Filed as an exhibit to the  Company's  Quarterly  Report on Form 10-Q (File
     No.  0-20139) for the quarter  ended  September  30, 1994 and  incorporated
     herein by reference.

(4)  Filed as an exhibit to the  Company's  Annual Report on Form 10-K (File No.
     0-20139)  for the fiscal  year ended  December  31,  1993 and  incorporated
     herein by reference.

(5)  Filed as an exhibit to the  Company's  Annual Report on Form 10-K (File No.
     0-20139),  for the fiscal year ended  December  31,  1994 and  incorporated
     herein by reference.

(6)  Filed as an exhibit to the Company's Registration Statement on Form S-2, as
     amended  (Registration No. 33-80773) on December 22, 1995, and incorporated
     herein by reference.

(7)  Filed as an exhibit to the  Company's  Annual Report on Form 10-K (File No.
     0-20139)  for the fiscal  year ended  December  31,  1995 and  incorporated
     herein by reference.

(8)  Filed as an  exhibit to the  Company's  Quarterly  Report on Form 10-Q,  as
     amended on Form 10-Q/A (File No.  0-20139) for the quarter ended  September
     30, 1996 and incorporated herein by reference.

(9)  Filed as an exhibit to the  Company's  Annual Report on Form 10-K (File No.
     0-20139)  for the fiscal  year ended  December  31,  1996 and  incorporated
     herein by reference.

(10) Filed as an exhibit to the  Company's  Quarterly  Report on Form 10-Q (File
     No. 0-20139) for the quarter ended June 30, 1997 and incorporated herein by
     reference.

(11) Filed as an exhibit to the  Company's  Annual Report on Form 10-K (File No.
     0-20139)  for the fiscal  year ended  December  31,  1997 and  incorporated
     herein by reference.

+    Confidential treatment granted as to certain portions of this exhibit.

++   Management contract or compensatory plan or arrangement filed as an exhibit
     to this Form pursuant to Items 14(a) and 14(c) of Form 10-K.



<PAGE>


                                   SIGNATURES

                  Pursuant to the requirements of the Securities Exchange Act of
1934,  the  registrant has duly caused this Form 10-K to be signed on its behalf
by the undersigned, thereunto duly authorized.

DIACRIN, INC.

By:      /s/ Thomas H. Fraser
        ---------------------
        Thomas H. Fraser
        President and Chief Executive Officer

Date:

         Pursuant to the  requirement  of the  Securities  Exchange Act of 1934,
this  report has been  signed  below by the  following  persons on behalf of the
Registrant and in the capacities and on the dates indicated:

      Signature                    Date                       Title

/s/ Thomas H. Fraser               3/31/99
- - ------------------------                            President, Chief Executive
Thomas H. Fraser                                    Officer and Director
                                                   (Principal Executive Officer)

/s/ Kevin Kerrigan                 3/31/99
- - ------------------------                            Controller
Kevin Kerrigan                                     (Principal Financial and
                                                    Accounting Officer)
/s/ Zola P. Horovitz               3/31/99
- - ------------------------                            Director
Zola P. Horovitz

/s/ John W. Littlechild            3/31/99
- - ------------------------                            Director
John W. Littlechild

/s/ Stelios Papadopoulos           3/31/99
- - ------------------------                            Director
Stelios Papadopoulos


- - ------------------------                            Director
Henri A. Termeer

/s/ Christopher T. Walsh           3/31/99
- - ------------------------                            Director
Christopher T. Walsh

/s/ Joshua Ruch                    3/31/99
- - ------------------------                            Director
Joshua Ruch


<PAGE>





                    Report of Independent Public Accountants

To Diacrin, Inc.:

         We have audited the  accompanying  balance  sheets of Diacrin,  Inc. (a
Delaware  corporation)  as of  December  31,  1997  and  1998,  and the  related
statements of operations, stockholders' equity (deficit) and cash flows for each
of the three  years in the period  ended  December  31,  1998.  These  financial
statements   are  the   responsibility   of  the   Company's   management.   Our
responsibility  is to express an opinion on these financial  statements based on
our audits.

         We conducted our audits in accordance with generally  accepted auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

         In our opinion,  the  financial  statements  referred to above  present
fairly, in all material respects,  the financial position of Diacrin, Inc. as of
December 31, 1997 and 1998, and the results of its operations and its cash flows
for each of the three years in the period ended December 31, 1998, in conformity
with generally accepted accounting principles.






                                                             Arthur Andersen LLP

Boston, Massachusetts
January 8, 1999

                                    - F-1 -

<PAGE>




                                             DIACRIN, INC.
                                             Balance Sheets
<TABLE>
<CAPTION>

                                                                             December 31,
                                                               ------------------------------------------
                                                                       1997                   1998
                                                                       ----                   ----
<S>                                                             <C>                    <C>                   

ASSETS
Current assets:
     Cash and cash equivalents                                   $     5,015,777        $     4,995,054
     Short-term investments                                            6,000,098             18,670,392
     Interest receivable and other current assets                        438,756                394,413
                                                                 -----------------      -----------------
          Total current assets                                        11,454,631             24,059,859
                                                                 -----------------      -----------------

Property and equipment, at cost:
     Laboratory and manufacturing equipment                              839,856                878,208
     Equipment under capital leases                                      675,262                675,262
     Furniture and office equipment                                      277,109                293,873
     Leasehold improvements                                               55,557                 76,827
                                                                 -----------------      -----------------
                                                                       1,847,784              1,924,170
     Less - Accumulated depreciation and amortization                    853,911              1,199,673
                                                                 -----------------      -----------------

                                                                         993,873                724,497
                                                                 -----------------      -----------------

Long-term investments                                                 10,331,289              2,605,010
Investment in joint venture                                                 -                    94,508
                                                                 -----------------      -----------------
                                                                      10,331,289              2,699,518
                                                                 -----------------      -----------------

                                                                 $    22,779,793        $    27,483,874
                                                                 =================      =================

LIABILITIES AND STOCKHOLDERS' EQUITY 
Current liabilities:
     Accounts payable                                            $       185,306       $        268,002
     Accrued expenses                                                    994,166              1,359,982
     Deferred revenue                                                    387,056                338,855
     Current portion of long-term debt                                   337,171                280,724
                                                                 -----------------      -----------------
          Total current liabilities                                    1,903,699              2,247,563
                                                                 -----------------      -----------------

Long-term debt
                                                                         672,426                391,702
                                                                 -----------------      -----------------

Commitments (Notes 8 and 12)

Stockholders' equity:
     Preferred stock, $.01 par value; authorized--5,000,000 shares;
          none issued and outstanding                                      -                       -
     Common stock, $.01 par value; authorized--30,000,000 shares;
          issued and outstanding-- 13,268,256 and 14,327,218 shares at
          December 31, 1997 and 1998, respectively                       132,683                143,272
Additional paid-in capital                                            54,730,773             64,191,075
Accumulated deficit                                                  (34,659,788)           (39,489,738)
                                                                 -----------------      -----------------
     Total stockholders' equity                                       20,203,668            24,844,609
                                                                 -----------------      -----------------

                                                                  $   22,779,793         $  27,483,874
                                                                 =================      =================

</TABLE>

                 See Accompanying Notes to Financial Statements



                                    - F-2 -

<PAGE>



                                              DIACRIN, INC.
                                         Statements of Operations

<TABLE>
<CAPTION>


                                                                 Year Ended December 31,
                                               ------------------------------------------------------------
                                                     1996                 1997                  1998
                                               ----------------- -- ----------------- ---- ----------------
<S>                                           <C>                  <C>                    <C>  

REVENUES:
     Research and development                  $     1,143,787      $     4,763,270        $     3,623,249
     Interest income                                 1,099,828            1,301,477              1,575,998
                                                                                           
                                               -----------------    -----------------      ----------------

        Total revenues                               2,243,615            6,064,747              5,199,247
                                                                                           
                                               -----------------    -----------------      ----------------


OPERATING EXPENSES:
     Research and development                        5,766,528            6,862,528             7,371,385
     General and administrative                      1,303,731            1,460,403             1,484,319
     Interest expense                                  158,155               93,280                89,135
                                               -----------------    -----------------      ----------------

        Total operating expenses                     7,228,414            8,416,211             8,944,839
                                               -----------------    -----------------      ----------------

EQUITY IN OPERATIONS OF JOINT
     VENTURE                                              -                    -               (1,084,358)
                                               -----------------    -----------------      ----------------

NET LOSS                                        $   (4,984,799)      $   (2,351,464)        $  (4,829,950)
                                               =================    =================      ================


NET LOSS PER COMMON SHARE:
     Basic and diluted                          $         (.44)      $         (.18)        $        (.34)
                                               =================    =================      ================

WEIGHTED AVERAGE
     SHARES OUTSTANDING:
      Basic and diluted                            11,389,823            13,235,286            14,156,179
                                               =================    =================      ================

</TABLE>















                 See Accompanying Notes to Financial Statements

                                    - F-3 -

<PAGE>


                                  DIACRIN, INC.
                   Statement of Stockholders' Equity (Deficit)

<TABLE>
<CAPTION>

                                                          Convertible Preferred Stock
                                             Series A               Series B              Series C       
                                        Number       $.01      Number      $.01      Number      $.01  
                                          of          Par        of         Par        of         Par  
                                        Shares       Value     Shares      Value     Shares      Value   
                                    -------------------------------------------------------------------
<S>                                  <C>          <C>        <C>        <C>        <C>        <C>

BALANCE, December 31, 1995            6,484,331    $ 64,843   2,446,917  $ 24,469   4,455,000  $ 44,550  

 Proceeds from initial 
 public offering of units,  
 net of $2,096,640 
 financing costs                           -            -         -          -          -          -      

 Conversion of notes payable 
 and accrued interest thereon 
 into common stock, net of 
 financing costs                           -            -          -         -          -          -    

 Conversion of preferred 
 stock into common stock             (6,484,331)   (64,843)  (2,446,917)  (24,469) (4,455,000)  (44,550) 
 Exercise of stock options                 -            -          -         -          -          -       
 Exercise of private 
 placement warrants                        -            -          -         -          -          -        
 Net loss                                  -            -          -         -          -          -         
                                    -------------------------------------------------------------------

BALANCE, December 31, 1996                 -            -          -         -          -          -     

 Exercise of stock options                 -            -          -         -          -          -      

 Net loss                                  -            -          -         -          -          -         
                                    -------------------------------------------------------------------

BALANCE, December 31, 1997                 -            -          -         -          -          -      
 Proceeds from private 
 placement of stock, net 
 of $58,080 financing costs                -            -          -         -          -          -      

 Exercise of stock options                                                                                  

 Net loss                                  -           -          -          -          -          -        
                                    -------------------------------------------------------------------

BALANCE, December 31, 1998                 -         $ -          -        $ -          -        $ -    
                                    ===================================================================

</TABLE>

<PAGE>

<TABLE>
<CAPTION>

                                     
                                           Common Stock                                        Total                  
                                        Number      $.01        Additional                  Stockholders'
                                          of         Par         Paid-in      Accumulated      Equity
                                        Shares      Value        Capital        Deficit       (Deficit)
                                    -------------------------------------------------------------------------
<S>                                <C>           <C>         <C>            <C>            <C>    
 
BALANCE, December 31, 1995              381,852   $ 3,819     $ 23,322,306   $ (27,323,525) $ (3,863,538)

 Proceeds from initial 
 public offering of units,  
 net of $2,096,640 
 financing costs                      2,875,000    28,750       20,874,610           -        20,903,360

 Conversion of notes payable 
 and accrued interest thereon 
 into common stock, net of 
 financing costs                      2,799,999    28,000        7,268,308           -         7,296,308

 Conversion of preferred 
 stock into common stock              6,693,121    66,931           66,931           -               -

 Exercise of stock options               12,146       122           15,037           -            15,159

 Exercise of private 
 placement warrants                     427,441     4,274        3,066,320           -         3,070,594

 Net loss                                  -          -              -        (4,984,799)     (4,984,799)
                                    -----------------------------------------------------------------------

BALANCE, December 31, 1996            13,189,559  131,896       54,613,512   (32,308,324)     22,437,084

 Exercise of stock options                78,697      787          117,261          -            118,048

 Net loss                                   -          -              -       (2,351,464)     (2,351,464)
                                    -----------------------------------------------------------------------

BALANCE, December 31, 1997            13,268,256   132,683       54,730,773  (34,659,788)     20,203,668

 Proceeds from private 
 placement of stock, net 
 of $58,080 financing costs            1,027,027    10,270        9,431,650         -          9,441,920

 Exercise of stock options                31,935       319           28,652         -             28,971

 Net loss                                  -          -              -        (4,829,950)     (4,829,950)
                                    ------------------------------------------------------------------------

BALANCE, December 31, 1998            14,327,218 $ 143,272     $ 64,191,075 $(39,489,738)   $ 24,844,609
                                    ========================================================================

</TABLE>

                 See Accompanying Notes to Financial Statements

                                    - F-4 -

<PAGE>




                                                     DIACRIN, INC.
                                               Statements of Cash Flows
<TABLE>
<CAPTION>

                                                                              Year Ended December 31,
                                                                  1996                 1997                  1998
<S>                                                        <C>                   <C>                  <C>   
CASH FLOWS FROM OPERATING ACTIVITIES:
    Net loss                                                $  (4,984,799)         $ (2,351,464)       $ (4,829,950)
                                                                                 
    Adjustments to reconcile net loss to net
       cash used in operating activities-
         Depreciation and amortization                            220,371               277,186             345,762
         Equity in operations of joint venture                      -                    -                1,084,358
                                                                                                       
    Changes in current assets and liabilities-
       Interest receivable and other current assets              (204,100)             (122,649)             44,343
       Accounts payable                                           (28,956)               23,248              82,696
       Accrued expenses                                          (241,643)              487,217             185,322
       Deferred revenue                                           618,844              (231,788)            (48,201)
                                                            ------------------    ----------------     ------------------
         Net cash used in operating activities                 (4,620,283)           (1,918,250)         (3,135,670)
                                                            ------------------    ----------------     ------------------


CASH FLOWS FROM INVESTING ACTIVITIES:
    (Increase) decrease in short-term investments              (6,255,507)              255,409         (12,670,294)
    Purchases of property and equipment, net                      (60,794)             (794,440)            (76,386)
    (Increase) decrease in long-term investments               (9,917,875)             (413,414)          7,726,279
    Investment in joint venture                                     -                    -               (1,911,216) 
    Return of capital for services provided on behalf               -                    -                  912,843
                                                            ------------------    ----------------     ------------------

         Net cash used in investing activities                (16,234,176)             (952,445)         (6,018,774)
                                                            ------------------    ----------------     ------------------


CASH FLOWS FROM FINANCING ACTIVITIES:
    Net proceeds from sale of common stock and warrants         23,989,113              118,048            9,470,891
    Proceeds from term loan                                         -                   650,000                -
    Principal payments on long-term debt                          (156,448)            (190,286)            (337,170)
    Decrease in deferred financing costs                           215,684                -                     -     
                                                            ------------------    ----------------     ------------------

         Net cash provided by financing activities              24,048,349              577,762            9,133,721
                                                            ------------------    ----------------     ------------------


NET INCREASE  (DECREASE) IN CASH AND CASH
EQUIVALENTS                                                      3,193,890           (2,292,933)             (20,723)

CASH AND CASH EQUIVALENTS, beginning of year                     4,114,820            7,308,710            5,015,777
                                                            ------------------    ----------------     ------------------

CASH AND CASH EQUIVALENTS, end of year                       $   7,308,710         $  5,015,777         $  4,995,054 
                                                            ==================    ================     ==================

SUPPLEMENTAL DISCLOSURE OF NONCASH FINANCING ACTIVITIES:
    Conversion of notes and accrued interest
         into common stock, net of financing costs           $   7,296,308         $       -            $      -
                                                            ==================    ================     ==================

SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
    Cash paid for interest                                   $      90,885         $     71,943         $    111,405
                                                            ==================    ================     ==================

</TABLE>


                                  See Accompanying Notes to Financial Statements


                                    - F-5 -

<PAGE>


                                  DIACRIN, INC.
                          Notes to Financial Statements

(1)      Operations and Basis of Presentation

         Diacrin,  Inc. (the "Company") was incorporated on October 10, 1989 and
is developing  transplantable cells for the treatment of human diseases that are
characterized by cell dysfunction or cell death and for which current  therapies
are either inadequate or nonexistent.

(2)      Summary of Significant Accounting Policies

         (a)       Principles of Consolidation

         The  accompanying  statement of operations  and cash flows for the year
ended   December  31,  1996  includes  the  accounts  of  the  Company  and  its
wholly-owned   subsidiary,   Diacrin   Securities   Corporation.   All  material
intercompany  accounts and transactions were eliminated in  consolidation.  This
subsidiary was dissolved on June 13, 1996.

         (b)      Depreciation and Amortization

         The Company provides for depreciation using the straight-line method by
charges to operations in amounts  estimated to allocate the cost of these assets
over a five-year  life.  Amortization  of  equipment  under  capital  leases and
leasehold  improvements  is  computed  using the  straight-line  method over the
shorter of the estimated useful life of the asset or the lease term.

         (c)      Research and Development

         Collaborative  revenue under the Joint Venture  agreement  with Genzyme
Corporation  (see Note 5) and revenues  from research  grants are  recognized as
work is performed.  Collaborative  revenue under the Joint Venture  agreement is
recognized as revenue to the extent that the Comany's  research and  development
costs are funded by Genzyme  through the Joint  Venture.  The  Company  receives
non-refundable  monthly  advances  from  the  Joint  Venture.  Deferred  revenue
represents  amounts  received  prior to  recognition  of revenue.  Research  and
development costs are expensed as incurred.

                                    - F-6 -

<PAGE>


                                  DIACRIN, INC.
                    Notes to Financial Statements (continued)

         (d)      Income Taxes

         The Company  accounts for income taxes in accordance  with Statement of
Financial Accounting Standards ("SFAS") No. 109, Accounting for Income Taxes. At
December 31, 1998, the Company has a net operating loss carryforward for federal
income tax purposes of  approximately  $39,000,000.  The difference  from losses
reported  for  financial   reporting  purposes  relates  primarily  to  expenses
reflected in the financial  statements not yet deductible for tax purposes.  The
net  operating  loss  carryforwards  expire  commencing in the year 2005 and are
subject to review and possible  adjustment by the Internal Revenue Service.  Net
operating  loss and tax  credit  carryforwards  may be  limited  in the event of
certain  changes in the ownership  interests of  significant  shareholders.  The
Company believes  issuance of the convertible notes payable in May 1995, as well
as the initial public  offering in February 1996,  caused a change in ownership,
as defined by the Tax Reform Act of 1986. The Company does not believe that such
ownership changes will significantly impact the Company's ability to utilize the
net operating loss and tax credit carryforwards as of the date of such ownership
changes.  Ownership changes in future periods may limit the Company's ability to
utilize net operating loss and tax credit carryforwards.


The components of the net deferred tax assets are approximately as follows:

                                                    1997                1998
                                                    ----                ----
           Loss carryforwards                $   13,285,000       $  15,546,000
           Start-up costs                           242,000               -
           Credit carryforwards                   2,569,000           2,684,000
           Other temporary differences                4,000              15,000
                                             ---------------      --------------
           Total deferred tax assets             16,100,000          18,245,000
           Less - valuation allowance           (16,100,000)        (18,245,000)
                                             ---------------      --------------
           Net deferred tax asset                     -                   -
                                             ===============      ==============

         A  valuation  allowance  has been  provided as it is  uncertain  if the
Company will realize the deferred tax assets.  The change in the total valuation
allowance   during  the  year  ended  December  31,  1998  was  an  increase  of
approximately  $2,145,000  and relates to the increase in the deferred tax asset
as a result of the net operating loss and tax credits generated during 1998.

         (e)      Net Loss per Common Share

         In accordance with Statement of SFAS No. 128, Earnings per Share, basic
and diluted net loss per share is calculated by dividing the net loss applicable
to  common  stockholders  by  the  weighted  average  number  of  common  shares
outstanding for all periods  presented.  Basic and diluted net loss per share is
calculated by dividing net loss by the weighted  average number of vested shares
of common stock and  preferred  stock,  on an  as-converted  basis,  outstanding
during  1996.  Diluted  weighted  average  shares  outstanding  for all  periods
presented exclude the 

                                    - F-7 -

<PAGE>

potential common shares from stock options and warrants of
430,832 at December  31,  1998  because to include  such shares  would have been
antidilutive.

         (f)      Use of Estimates

         The  preparation of financial  statements in conformity  with generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that affect the reported  amounts of assets and  liabilities at the
date of the financial statements and the reported amounts of expenses during the
reporting period. Actual results could differ from those estimates.

         (g)      Reclassifications

         Certain  prior year  amounts have been  reclassified  to conform to the
current year presentation.

         (h)      New Accounting Standards

         In June 1997, the Financial  Accounting Standards Board ("FASB") issued
SFAS No. 130, Reporting  Comprehensive  Income. SFAS No. 130 requires disclosure
of all  components  of  comprehensive  income on an annual  and  interim  basis.
Comprehensive  income is defined as the change in stockholders' equity (deficit)
of a business  enterprise during a period from transactions and other events and
circumstances from nonowner sources.  The Company's  comprehensive income (loss)
is the same as presented for all periods.

         The Company has adopted SFAS No. 131  Disclosures  about Segments of an
Enterprise and Related Information,  in the fiscal year ended December 31, 1998.
SFAS No. 131 requires  certain  financial and  supplementary  information  to be
disclosed  on an annual  and  interim  basis for each  reportable  segment of an
enterprise.  SFAS No. 131 also  establishes  standards  for related  disclosures
about products and services,  geographic  areas and major  customers.  Operating
segments  are  defined as  components  of an  enterprise  about  which  separate
discrete  financial  information is evaluated  regularly by the chief  operating
decision maker or decision making group,  in deciding how to allocate  resources
and assess performance. Unless impracticable,  companies are required to restate
prior period  information  upon  adoption.  To date,  the Company has viewed its
operations and managed its business as principally one segment. As a result, the
financial  information  disclosed  herein,  materially  represents  all  of  the
financial information related to the Company's principal operating segment.

         In April 1998, the American  Institute of Certified Public  Accountants
("AICPA") issued Statement of Position ("SOP") No. 98-5,  Reporting on the Costs
of Start-Up Activities, which requires that all nongovernmental entities expense
the costs of start-up activities, including organizational costs, as those costs
are incurred.  The Company has historically recorded all such costs as expenses,
in the period incurred.

                                    - F-8 -

<PAGE>

         In March 1998, the AICPA issued SOP No. 98-1,  Accounting for the Costs
of Computer  Software  Developed  or Obtained  for  Internal  Use.  SOP No. 98-1
requires certain computer software costs associated with  internal-use  software
to be expensed as incurred  until certain  capitalization  criteria are met. The
Company  will  adopt SOP No.  98-1  prospectively  beginning  January  1,  1999.
Adoption of this  statement  is not  expected  to have a material  impact on the
Company's consolidated financial position or results of operations.



(3)      Initial Public Offering

         On February 12, 1996, the Company  completed an initial public offering
of 2,500,000  units,  each unit  consisting of one share of common stock and one
redeemable  warrant to purchase  one share of common stock for $16.00 per share,
for net proceeds of approximately  $18.2 million.  In addition,  all outstanding
shares of Series  A, B and C  convertible  preferred  stock  were  automatically
converted  into an  aggregate  of  6,693,121  shares  of  common  stock  and the
outstanding $7,000,000 of convertible notes payable were automatically converted
into an aggregate  of  2,799,999  shares of common stock upon the closing of the
initial  public  offering.  On March 7, 1996, the  underwriters  of the offering
exercised their  over-allotment  option to purchase an additional 375,000 units,
resulting  in  additional  net  proceeds of  approximately  $2.8  million to the
Company.  On August 12, 1996, the common stock and warrants underlying the units
began to trade separately.

(4)      Private Placement of Common Stock

         In  February  1998,  the  Company  completed  a  private  placement  of
1,027,027  shares of its common  stock for $9.25 per share for net  proceeds  of
approximately $9.44 million.

(5)      Joint Venture Agreement

         In  September  1996,  the Company and Genzyme  Corporation  ("Genzyme")
formed  a  joint   venture   to  develop   and   commercialize   the   Company's
NeuroCell(TM)-PD and  NeuroCell(TM)-HD  products for transplantation into people
with advanced Parkinson's disease and Huntington's disease, respectively.  Under
the terms of the Joint Venture  agreement,  which was effective October 1, 1996,
Genzyme  agreed to provide  100% of the first $10  million in funding and 75% of
the following $40 million in funding for the two products. All costs incurred in
excess of $50 million will be shared equally  between Genzyme and the Company in
accordance  with the terms of the  agreement.  Any profits of the Joint  Venture
will be shared equally by the two parties.

         Genzyme  agreed to make  financing  available to Diacrin from and after
the date that Genzyme provides the initial $10.0 million of funding to the Joint
Venture. Genzyme agreed to make available to Diacrin an unsecured,  subordinated
line of credit  

                                    - F-9 -

<PAGE>

(the  "Line")  of up to an  aggregate  amount of $10.0  million.
Diacrin  may draw on the Line only in the  event  that  Diacrin's  cash and cash
equivalents  are  insufficient  to  fund  Diacrin's  budgeted  operations  for a
specified  period of time,  and the funds  may be used by  Diacrin  only to fund
capital  contributions to the Joint Venture.  The Line will be available through
the date five years  after the date  Diacrin  first  draws on the Line,  and all
outstanding  principal  and  interest  will  be due on that  fifth  anniversary.
Advances will be interest-bearing, evidenced by a promissory note and subject to
other considerations; and the aggregate amount of draws in any calendar year may
not exceed $5.0  million.  Diacrin did not make any draws on the Line during the
year ended December 31, 1998.

         During  the  year  ended  December  31,  1996,  the  Company   received
$1,662,631  under the agreement,  of which  $1,043,787 was recognized as revenue
and $618,844 was deferred until the work was performed in 1997.  During the year
ended December 31, 1997, the Company received $4,557,252 under the agreement and
$4,763,270 was recognized as revenue. In addition,  $25,770 of capital equipment
was  acquired  on  behalf  of the  Joint  Venture  for  which  the  Company  was
reimbursed.  At December  31,  1997,  $387,056 of total  amounts  received  were
recorded as deferred  revenue.  During the year ended  December  31,  1998,  the
Company  received  $4,499,000,  of which  $3,623,249  was recognized as revenue,
$11,110  reimbursed the Company for capital equipment  acquired on behalf of the
Joint Venture and $338,855 has been recorded as deferred  revenue.  In addition,
the Company made  $1,911,216 in  contributions  to the Joint  Venture,  of which
$912,843  was  returned to the Company  for  services  provided on behalf of the
Joint  Venture,  and at December 31, 1998,  the Company had accrued  $180,493 in
costs  incurred by Genzyme on behalf of the Joint Venture that will be funded in
1999.

         The Company  accounts for its  investment  in the joint  venture on the
equity method.  Through  December 31, 1997, the Company had not made any capital
contributions to the Joint Venture.  During 1998, the Company began  recognizing
an expense  related to costs  incurred by Genzyme on behalf of the Joint Venture
that  are  funded  by the  Company.  The  Company  has  performed  research  and
development  on behalf of the Joint Venture and has  recognized  revenues to the
extent  these  costs  were  funded by  Genzyme.  Genzyme's  President  and Chief
Executive Officer is a director of the Company.

                                    - F-10 -

<PAGE>

(6)      Cash Equivalents and Investments

         The  Company's  cash  equivalents  and  investments  are  classified as
held-to-maturity  and are carried at amortized cost, which  approximates  market
value. Cash equivalents,  short-term  investments and long-term investments have
maturities  of less than three  months,  less than one year and greater than one
year,  respectively.  Cash  and cash  equivalents,  short-term  investments  and
long-term investments at December 31, 1997 and 1998 consisted of the following:
<TABLE>
<CAPTION>

                                                                                     1997                   1998
                                                                               ------------------     ------------------
<S>                                                                            <C>                   <C>   

Cash and cash equivalents-
    Cash                                                                       $          381         $            576
    Money market mutual fund                                                        2,513,759                4,994,478
    Commercial paper                                                                2,501,637                 -
                                                                               ------------------     ------------------
                                                                               $    5,015,777          $     4,995,054
                                                                               ==================     ==================

Short-term investments-
    Corporate notes (remaining avg. maturity of 7 mos. at December 31, 1998)   $     3,000,429         $     18,670,392
    Certificate of deposit                                                             999,669                    -
    US government agency obligation                                                  2,000,000                    -
                                                                              -------------------    -------------------
                                                                               $     6,000,098         $     18,670,392
                                                                              ===================    ===================
Long-term investments-
    Corporate notes (remaining avg. maturity of 14 mos. at December 31, 1998)  $    10,331,289         $      2,605,010
                                                                              ===================    ===================
</TABLE>

(7)      Accrued Expenses

         Accrued  expenses  consisted of the  following at December 31, 1997 and
1998:
<TABLE>
<CAPTION>

                                                                               1997                             1998
                                                                               ----                             ----
           <S>                                                         <C>                             <C>   

           Accrued clinical trials costs                                $   316,007                      $   595,030
           Accrued contract research costs                                  150,261                          239,034
           Accrued professional fees                                        129,625                          131,805
           Accrued payroll                                                  159,214                          164,574
           Accrued other                                                    239,059                          229,539
                                                              ----------------------            ---------------------

           Total                                                        $   994,166                    $   1,359,982
                                                              ======================            =====================


</TABLE>





(8)      Long-term Debt and Obligations Under Capital Leases

         (a)      Term Loan

         In November  1997,  the Company  entered  into an  unsecured  term loan
agreement with a bank whereby the bank loaned the Company  $650,000 to construct
a pilot manufacturing facility. Interest accrues at the Prime Rate plus one-half
of one percent  (8.25% at December 31, 1998) and is payable  monthly in arrears.
The loan is  payable  in sixty  principal  installments  of  $10,833  commencing
December 1, 1997 and may be 

                                    - F-11 -

<PAGE>

prepaid without penalty.  The Company is required to
maintain certain covenants,  including certain financial ratios and unencumbered
cash balances of not less than $1 million.  As of December 31, 1998, the Company
was in compliance with all covenants.

         (b)      Capital Leases

         On December 22, 1994,  the Company sold certain  laboratory  equipment,
with an original cost of  approximately  $805,000,  for $600,000.  In connection
with this  transaction,  the Company entered into a capital lease under a master
lease  agreement  to lease the  equipment  back for  payments  of  approximately
$15,000 per month for 48 months. Upon completion of the original lease term, the
Company  extended the lease term for an additional  six months at  approximately
$15,000  per month,  at which time title to the  equipment  reverts  back to the
Company. On July 1 and December 22, 1995, the Company sold additional  equipment
at its original cost of approximately  $142,000 and $85,000,  respectively,  and
entered into capital leases under the  aforementioned  master lease to lease the
equipment back for 48 monthly payments of approximately  $3,500  commencing July
1, 1995 and $2,100  commencing  January 1, 1996.  Upon  completion of each lease
term,  the Company is required to purchase all of the  equipment  for 15% of the
amount financed or extend each lease term for an additional six months, at which
times  title  to the  equipment  reverts  back to the  Company.  The sale of the
equipment  in 1994  and  1995  generated  gains of  approximately  $139,000  and
$13,000, respectively, which have been offset against the cost of the assets and
are being  amortized over the life of the leases in accordance  with SFAS No. 13
"Accounting for Leases".

         The future minimum  payments  under all capital lease  agreements as of
December 31, 1998 are as follows:

                                                 1999                $   161,310
                                                 2000                     12,649
                                                           ---------------------

Total minimum lease payments                                             173,959
Less-Amount representing interest                                         10,700
                                                           ---------------------

Present value of minimum lease payments                                  163,259
Less-Current obligation under capital lease                              150,724
                                                           ---------------------
                                                                     $    12,535
                                                           =====================




(9)      Stockholders' Equity (Deficit)

         (a)      Preferred Stock

         As of  December  31,  1997,  the  Company  has an  authorized  class of
undesignated preferred stock consisting of 5,000,000 shares. The Company's Board
of Directors is  authorized,  subject to any  limitations  prescribed by law and
without further stockholder approval, to issue from time to time up to 5,000,000
shares of preferred  stock in one or more series.  Each such series of preferred
stock  shall  have such  number of  shares, 

                                    - F-12 -

<PAGE>

designations,  preferences,  voting
powers,  qualifications  and rights or  privileges as shall be determined by the
Board of Directors.

         (b)      Warrants

         In November  1991, in connection  with the sale of Series C convertible
preferred  stock,  the Company  issued  warrants to purchase  465,853  shares of
common  stock  exercisable  at $7.20 per share.  The warrants  were  exercisable
commencing August 9, 1996 and expired on November 14, 1996. Warrants to purchase
427,441  shares of common stock were  exercised  during 1996 for net proceeds to
the Company of approximately $3,071,000.

         In  December  1994,  the Company  issued a warrant for the  purchase of
common stock in  connection  with a master lease  agreement as discussed in Note
7(b).  The  warrant  is  exercisable  for  12,474  shares of common  stock at an
exercise price of $7.92 per share. The warrant expires in December 1999.

         As  discussed  in Note 3, the  Company  issued  redeemable  warrants in
connection  with the Company's  initial  public  offering to purchase  2,875,000
shares of common stock at an exercise price of $16 per share, subject to certain
adjustments. The warrants may be exercised commencing August 12, 1996 and expire
on the  earlier to occur of  redemption  of the  warrant by the  Company,  which
option the Company may  exercise (at a price of $.01 per warrant) if the average
closing  price of the common  stock for any  20-consecutive-day  trading  period
exceeds 150% of the exercise  price of the warrants,  or December 31, 2000.  All
2,875,000 warrants were outstanding at December 31, 1998.

(10)     Common Stock Options

         The Company has  adopted the 1990 Stock  Option Plan (the "1990  Plan")
under  which the Board of  Directors  is  authorized  to grant  incentive  stock
options, non-qualified stock options and stock appreciation rights to employees,
directors  and  consultants  of the  Company  for up to  800,000  shares  of the
Company's common stock. All options granted have 10-year terms, and the majority
vest in equal annual  installments  of 25% over four years of continued  service
from the date of hire or grant.  As of December 31, 1998,  there were options to
purchase 75,420 shares of common stock available for future grant under the 1990
Plan.

         In  December  1993,  the Company  granted  non-qualified  options,  not
included in the 1990 Plan, to purchase 214,105 shares of common stock at a price
of $2.50  per share and  57,500  shares of common  stock at a price of $4.00 per
share to certain  advisors to the Company.  These options have 10-year terms and
were fully  vested upon the date of grant.  In June 1994,  the  Company  granted
non-qualified  options, not included in the 1990 Plan, to purchase 45,000 shares
of  common  stock at a price of $8.50  per  share  to  certain  advisors  to the
Company. In April 1996, the Company granted non-qualified  options, not included
in the 1990 Plan, to purchase  25,000 shares of common stock at a price of $9.50
per share to an executive of the Company as an inducement to his 

                                    - F-13 -

<PAGE>

employment. The
options  granted in 1994 and 1996 have  10-year  terms and vest in equal  annual
installments of 25% over four years of continued service from the date of grant.

         In July 1994,  the  stockholders  approved  the 1994  Directors'  Stock
Option Plan (the "Director Plan") which  automatically  grants an option to each
eligible  outside  director of the Company for the  purchase of 7,500  shares of
common  stock at an exercise  price of the then fair market  value.  Each option
granted  under the  Director  Plan has a 10-year  term and may be exercised on a
cumulative basis as to 25% of the shares on the first anniversary of the date of
grant and an additional 25% at the end of each one-year  period  thereafter.  In
December 1996, the Board of Directors amended the Director Plan to automatically
grant 15,000  options to each new  eligible  outside  director.  The Company has
reserved  30,000  shares for issuance  under this plan. As of December 31, 1998,
there were 28,125  options  outstanding  under the  Director  Plan at a weighted
average  exercise price of $10.38 per share. As of December 31, 1998, there were
no options available for grant under the Director Plan.

         In June 1997, the stockholders approved the 1997 Stock Option Plan (the
"1997 Plan") under which the Board of Directors is authorized to grant incentive
stock  options and  non-qualified  stock  options to  employees,  directors  and
consultants  of the Company for up to 1,200,000  shares of the Company's  common
stock.  All  options  granted  have  10-year  terms,  and vest in  equal  annual
installments  of 25% over four years of continued  service from the date of hire
or grant. As of December 31, 1998,  options to purchase 904,250 shares of common
stock were available for future grant under the 1997 Plan.

         The following table summarizes incentive and non-qualified stock option
activity, exclusive of the warrants discussed in Note 9(b):
<TABLE>
<CAPTION>

                                                                 Number of                       Weighted average
                                                                  options                         Exercise price
<S>                                                             <C>                              <C>   

Balance, December 31, 1995                                                794,330                            1.90
      Options granted                                                     208,000                            9.11
      Options exercised                                                   (12,146)                           1.25
      Options canceled                                                    (15,689)                           1.85
                                                          ------------------------

Balance, December 31, 1996                                                974,495                            3.44
      Options granted                                                     209,250                           11.01
      Options exercised                                                   (78,697)                           1.50
      Options canceled                                                    (78,250)                           9.33
                                                          ------------------------

Balance, December 31, 1997                                              1,026,798                            4.69
      Options granted                                                     189,250                            6.43
      Options exercised                                                   (31,935)                            .91
      Options canceled                                                    (58,375)                           9.18
                                                          ------------------------

Balance, December 31, 1998                                              1,125,738                            4.87
                                                          ========================

Exercisable, December 31, 1998                                            735,609                            3.31
                                                          ========================
</TABLE>

         All options have been granted at the fair market value of the Company's
common stock on the date of grant.

                                    - F-14 -

<PAGE>

         The  following  table  summarizes  certain  information  about  options
outstanding and exercisable at December 31, 1998:
<TABLE>
<CAPTION>

                                                Options outstanding
                -----------------------------------------------------------------------------------


                                                                  Weighted average
 Range of exercise prices         Number outstanding at         remaining contractual      Weighted average exercise
                                    December 31, 1998                   life                         price
- - ---------------------------    ----------------------------    -----------------------    ---------------------------
<S>                                    <C>                             <C>  

  $   .02     to     $ 2.50               650,238                         5.3                      $   2.01
  $  5.25     to     $ 9.50               280,000                         9.1                      $   7.15
  $ 10.00     to     $12.00               195,500                         8.7                      $ 11.11
                               ----------------------------

                                        1,125,738
                               ============================

</TABLE>
<TABLE>
<CAPTION>


                                               Options exercisable
                -----------------------------------------------------------------------------------

                                                 Number exercisable                      Weighted average
       Range of exercise prices                  at December 31, 1998                     exercise price
- - ---------------------------------------    --------------------------------    --------------------------------------
<S>                                             <C>                                     <C>    

            $   .02     to    $   2.50                  617,738                               $  2.03
            $  7.50     to    $   9.50                   60,250                               $  8.82
            $ 10.00     to    $  12.00                   57,621                               $ 11.28
                                           --------------------------------
                                                        735,609
                                           ================================
</TABLE>


     The  Company  has  adopted  SFAS  No.  123,   Accounting  for   Stock-Based
Compensation. As permitted by SFAS No. 123, the Company has continued to account
for employee  stock  options in  accordance  with  Accounting  Principles  Board
Opinion No. 25,  Accounting for Stock Issued to Employees,  and has included the
proforma disclosure required by SFAS No. 123 for all periods presented.

         Pro forma  information  regarding  net income and earnings per share is
required  by SFAS  No.  123,  and has  been  determined  as if the  Company  had
accounted for its employee stock options under the fair value method of SFAS No.
123. The fair-value for these options was estimated at the date of grant using a
Black-Scholes option pricing model with the following assumptions for 1996, 1997
and  1998:  risk-free  interest  rates of 6.5%,  5.5%  and  5.5%,  respectively;
dividend  yield of 0% for all years;  volatility  factor of the expected  market
price of the Company's common stock of 70% for all years; and a weighted-average
expected life of the options of 7.5 years for all years.

                                    - F-15 -

<PAGE>

         For purposes of pro forma  disclosure,  the estimated fair value of the
options is amortized to expense over the options' vesting period.  The aggregate
fair  value  of  options  granted  in 1996,  1997  and  1998  was  approximately
$1,400,000,  $1,689,000  and  $886,000,  respectively.  The  Company's pro forma
information follows:
<TABLE>
<CAPTION>

                                                           1996                 1997                  1998
                                                           ----                 ----                  ----
        <S>                   <C>                    <C>                   <C>   

         Net loss              As reported            $(4,984,799)          $(2,351,464)          $(4,829,950)

                               Pro forma               (5,071,094)           (2,833,712)           (5,644,899)

         Basic and             As reported                   (.44)                 (.18)                 (.34)
         diluted net loss
         per share:            Pro forma                     (.45)                 (.21)                 (.40)

</TABLE>



(11)     Facility Lease

         During 1991, the Company entered into a ten-year  operating lease for a
facility. Minimum rental payments under the lease are as follows:

                                                                     Rental
                                                                   Commitment

                             1999                                  $ 710,000
                             2000                                    710,000
                             2001                                    533,000
                                                              ------------------

                                                                 $ 1,953,000
                                                              ==================

         Total rent expense for the years ended December 31, 1996, 1997 and 1998
was approximately $700,000, $761,000 and $771,000, respectively. The 1996 period
is net of sublease revenue received from subtenants of $58,000

                                    - F-16 -

<PAGE>











                        Report of Independent Accountants


To the Venturers of
    Diacrin/Genzyme LLC
    (A Development Stage Enterprise):

In our opinion,  the  accompanying  balance sheet and the related  statements of
operations,  changes in  venturers'  capital  (deficit)  and cash flows  present
fairly, in all material respects,  the financial position of Diacrin/Genzyme LLC
(A Development Stage Enterprise) (the "Joint Venture") at December 31, 1998, and
the results of its operations and its cash flows for the year ended December 31,
1998 and for the period from October 1, 1996 (date of inception) to December 31,
1998,  in  conformity  with  generally  accepted  accounting  principles.  These
financial  statements are the responsibility of the Joint Venture's  management;
our responsibility is to express an opinion on these financial  statements based
on our audit.  We conducted our audit of these  statements  in  accordance  with
generally accepted auditing standards which require that we plan and perform the
audit to obtain reasonable  assurance about whether the financial statements are
free of material  misstatement.  An audit includes  examining,  on a test basis,
evidence  supporting the amounts and  disclosures  in the financial  statements,
assessing the  accounting  principles  used and  significant  estimates  made by
management,  and evaluating the overall  financial  statement  presentation.  We
believe  that our audit  provides a reasonable  basis for the opinion  expressed
above.






Boston, Massachusetts
February 12, 1999,  except as to the information  presented in Note E, for which
    the date is March 4, 1999



                                    - F-17 -

<PAGE>



                                           DIACRIN/GENZYME LLC
                                     (A Development Stage Enterprise)

                                              BALANCE SHEET

                                            December 31, 1998


                                                  ASSETS
Cash                                                            $         4,908
Prepaid to Diacrin, Inc. (Note C)                                       346,925
Other current assets                                                     11,899
                                                               -----------------

                   Total current assets                                 363,732

Property and equipment, net (Note D)                                     220,164
                                                               -----------------

                   Total assets                                   $     583,896
                                                               =================


                               LIABILITIES AND VENTURERS' CAPITAL (DEFICIT)

Payable to Genzyme Tissue Repair (Note C)                         $     885,161
                                                               -----------------

                   Total liabilities                                    885,161
                                                               -----------------

Commitments and contingencies (Notes C and E)

Venturers' capital (deficit) (including deficit accumulated during the
        development stage of $17,946,732)
     Genzyme Corporation                                               (223,823)
     Diacrin, Inc.                                                      (77,442)
                                                               -----------------

                   Total venturers' capital (deficit)                  (301,265)
                                                               -----------------
                       Total liabilities and venturers' 
                            capital (deficit)                     $     583,896
                                                               =================





   The accompanying notes are an integral part of these financial statements.

                                    - F-18 -

<PAGE>


                               DIACRIN/GENZYME LLC
                        (A Development Stage Enterprise)

                            STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>

                                                                                                  for the period
                                                                                                       from
                                                                                                 October 1, 1996
                                                                         for the year                (date of
                                                                             ended                inception) to
                                                                         December 31,              December, 31
                                                                             1998                      1998
                                                                       ------------------     -----------------------
<S>                                                                    <C>                       <C>   

Operating costs and expenses
    Research and development - Diacrin, Inc.                             $     4,549,000           $      10,349,398
    Research and development - Genzyme Tissue Repair                           4,985,391                   7,489,071
    General and administrative expenses                                           60,955                     108,263
                                                                       ------------------     -----------------------

Net loss                                                                 $    (9,595,346)          $     (17,946,732)
                                                                       ==================     =======================

</TABLE>





















   The accompanying notes are an integral part of these financial statements.

                                    - F-19 -

<PAGE>


                               DIACRIN/GENZYME LLC
                        (A Development Stage Enterprise)

                            STATEMENTS OF CASH FLOWS
<TABLE>
<CAPTION>

                                                                                           for the period
                                                                                                from
                                                                                          October 1, 1996
                                                                     for the year             (date of
                                                                         ended             inception) to
                                                                     December 31,           December, 31
                                                                         1998                   1998
                                                                   ------------------    -------------------
<S>                                                                 <C>                    <C>    

Operating activities:
     Net loss                                                          $  (9,595,346)        $  (17,946,732)

     Reconciliation  of net loss to net cash used by operating activities:
         Depreciation                                                         37,625                 59,218
         Increase (decrease) in cash from working
                     capital changes:
              Prepaid to Diacrin, Inc.                                        50,000              (346,925)
              Payable to Genzyme Tissue Repair                               667,505                885,161
              Other current assets                                              (649)               (11,899)
                                                                   ------------------    -------------------

Net cash used by operating activities                                     (8,840,865)           (17,361,177)
                                                                   ------------------    -------------------

Investing activities:
    Acquisition of property and equipment                                    (78,191)              (279,382)

Financing activities:
    Capital contributed by Genzyme Tissue Repair                           7,004,722             15,736,226
    Capital contributed by Diacrin, Inc.                                   1,909,241              1,909,241
                                                                   ------------------    -------------------

Net cash provided by financing activities                                  8,913,963             17,645,467
                                                                   ------------------    -------------------

(Decrease) increase in cash                                                  (5,093)                  4,908
Cash at beginning of period                                                  10,001                     -
                                                                   ------------------    -------------------

Cash at end of period                                               $         4,908       $           4,908
                                                                   ==================    ===================

There were no non-cash transactions and no interest or taxes were paid.
</TABLE>

         The accompanying notes are an integral part of these financial

                                    - F-20 -

<PAGE>


                               DIACRIN/GENZYME LLC
                        (A Development Stage Enterprise)

              STATEMENT OF CHANGES IN VENTURERS' CAPITAL (DEFICIT)

  for the period from October 1, 1996 (date of inception) to December 31, 1998

<TABLE>
<CAPTION>

                                                                                                   Total
                                                        Genzyme                                  Venturers'
                                                      Corporation          Diacrin, Inc.      Capital (Deficit)
                                                    ----------------     ---------------    ---------------------
<S>                                                  <C>                   <C>                <C>  

1996 capital contributions                             $  1,911,968                               $    1,911,968
1996 net loss                                            (1,542,374)                                  (1,542,374)
                                                    ----------------                        ---------------------

Balance at December 31, 1996                                369,594                                      369,594

1997 capital contributions                                6,819,536                                    6,819,536
1997 net loss                                            (6,809,012)                                  (6,809,012)
                                                    ----------------                        ---------------------

Balance at December 31, 1997                                380,118                                      380,118

1998 capital contributions                                7,004,722         $ 1,909,241                8,913,963
1998 net loss                                            (7,608,663)         (1,986,683)              (9,595,346)
                                                    ----------------     ---------------    ---------------------

Balance at December 31, 1998                            $  (223,823)        $   (77,442)          $     (301,265)
                                                    ================     ===============    =====================


</TABLE>













   The accompanying notes are an integral part of these financial statements.

                                    - F-21 -

<PAGE>


                               DIACRIN/GENZYME LLC
                        (A Development Stage Enterprise)

                          NOTES TO FINANCIAL STATEMENTS


A.     Organization:

       On  October  1,  1996,  Diacrin/Genzyme  LLC ("the  Joint  Venture")  was
       established as a joint venture  between Genzyme  Corporation  ("Genzyme")
       and Diacrin, Inc. ("Diacrin") (collectively, the "Venturers"), to develop
       and  commercialize  products and  processes  for use in the  treatment of
       Parkinson's  disease and  Huntington's  disease in humans  using  porcine
       fetal  cells.  Genzyme  allocated  the JV to the  Genzyme  Tissue  Repair
       Division ("GTR").  Under the terms of the  Collaboration  Agreement among
       Diacrin,  Genzyme and the Joint Venture (the "Collaboration  Agreement"),
       all funding is  provided  by the  Venturers,  and all  payments  for work
       performed  are made to the  Venturers.  GTR  provided  the initial  $10.0
       million of the funding  requirements,  and the next $40.0  million of the
       funding  requirements  will be  provided  75% by GTR and 25% by  Diacrin.
       After $50.0 million has been funded,  additional funding will be provided
       equally by the Venturers.  Funding is provided on a monthly basis. Losses
       from the  Joint  Venture  will be  shared in  proportion  to the  capital
       contributions  of each  Venturer.  Profits from the Joint Venture will be
       shared equally by the Venturers.  The amounts funded to the Joint Venture
       by the Venturers  are paid by the Joint  Venture to the  Venturers  based
       upon the dollar  amount of work,  at  defined  cost,  that each  Venturer
       performs  toward  the  Joint  Venture.  All  general  and  administrative
       expenses  recorded on the statements of operations are for costs incurred
       by and reimbursed to, the Venturers. See also Note C.

       The   Steering   Committee   of  the  Joint   Venture  is   comprised  of
       representatives  of each Venturer.  The Steering Committee is responsible
       for  approving  the  budget  of the  Joint  Venture  and  monitoring  the
       scientific progress of the Joint Venture.

       The intangible assets or technological know-how contributed by Diacrin to
       the  Joint  Venture  is not  included  as an  asset  in  these  financial
       statements because generally accepted accounting  principles require that
       assets be recorded at their book value. The book value of these assets is
       $0.



B.     Accounting Policies:

          Accounting Method

          The financial  statements  have been prepared under the accrual method
          of  accounting  in  conformity  with  generally  accepted   accounting
          principles.

                                    - F-22 -

<PAGE>


                               DIACRIN/GENZYME LLC
                        (A Development Stage Enterprise)

                    NOTES TO FINANCIAL STATEMENTS, CONTINUED


          Fiscal Year-End

          Genzyme and Diacrin,  as Venturers,  have  determined  that the fiscal
          year-end of the Joint Venture is December 31.

            Use of Estimates

          The  preparation of financial  statements in conformity with generally
          accepted  accounting  principles  requires  management to make certain
          estimates and assumptions  that effect the reported  amounts of assets
          and liabilities and disclosure of contingent assets and liabilities at
          the date of the  financial  statements  and the  reported  amounts  of
          revenues and expenses during the reported period. Actual results could
          differ from those estimates.

          Property and Equipment

          Depreciation  expense is  computed on a  straight-line  basis over the
          useful life of the property and equipment (3 to 7 years), and over the
          lesser  of  the  life  of  the  lease  or the  life  of the  leasehold
          improvement.  When assets are retired or  otherwise  disposed  of, the
          assets and the related  accumulated  depreciation are removed from the
          accounts and any resulting gains or losses are included in the results
          of operations.

          Research and Development Expenses

          Research and development costs are expensed as incurred.  The research
          and   development   efforts  are  currently  being  conducted  by  the
          Venturers.  The costs  incurred by these  related  parties,  which are
          subject  to an  annual  budget  as  approved  by the  Joint  Venture's
          Steering Committee,  are then charged to the Joint Venture, at defined
          cost, or at amounts agreed to by the Venturers.

          Income Taxes

          The Joint Venture is organized as a pass-through entity;  accordingly,
          the financial  statements do not include a provision for income taxes.
          Taxes, if any, are the liability of Genzyme and Diacrin, as venturers.

          Uncertainties

          The Joint  Venture  is  subject to risks  common to  companies  in the
          biotechnology  industry,  including but not limited to, development by
          its  competitors  of  new  technological  innovations,  protection  of
          proprietary  technology,  health  care cost  containment  initiatives,
          product   liability  and  compliance  with   government   regulations,
          including  those of the United  States  Department of Health and Human
          Services and the United States Food and Drug Administration.


                                    - F-23 -

<PAGE>

                               DIACRIN/GENZYME LLC
                        (A Development Stage Enterprise)

                    NOTES TO FINANCIAL STATEMENTS, CONTINUED


C.     Agreements with Venturers:

          Funding

          Genzyme agreed to make  financing  available to Diacrin from and after
          the date that Genzyme provides the initial $10.0 million of funding to
          the Joint  Venture.  Genzyme  agreed to make  available  to Diacrin an
          unsecured,  subordinated  line  of  credit  (the  "Line")  of up to an
          aggregate  amount of $10.0 million.  Diacrin may draw on the Line only
          in the event that Diacrin's cash and cash equivalents are insufficient
          to fund Diacrin's budgeted  operations for a specified period of time,
          and  the  funds  may  be  used  by  Diacrin   only  to  fund   capital
          contributions to the Joint Venture. The Line will be available through
          the date five years  after the date  Diacrin  first draws on the Line,
          and all  outstanding  principal and interest will be due on that fifth
          anniversary.  Advances  will  be  interest-bearing,   evidenced  by  a
          promissory note and subject to other considerations; and the aggregate
          amount of draws in any  calendar  year may not  exceed  $5.0  million.
          Diacrin  did not make any  draws on the  Line  during  the year  ended
          December 31, 1998.

          During the year ended December 31, 1998, the amount of funding Genzyme
          provided to the Joint  Venture  exceeded the initial  $10.0 million of
          funding to the Joint  Venture;  and,  therefore,  Genzyme  and Diacrin
          funded 75% and 25%, respectively, thereafter.

          Other Agreements

          The amount payable to GTR for research and development will be settled
          by  cash  payment  and  represents  costs  incurred  by GTR  that  are
          reimbursable under the Collaboration  Agreement. The amount prepaid to
          Diacrin is based upon Diacrin's estimate of the work they will perform
          in the next month.

          According to the terms of the Operating  Agreement between Diacrin and
          Genzyme (the "Operating  Agreement"),  in no event shall net losses of
          the Joint Venture be allocated to a Venturer if such allocation  would
          cause or  increase  a  negative  balance  in such  Venturer's  capital
          account.  However,  both  Venturers had negative  capital  balances at
          December   31,  1998  in  violation   of  the   Operating   Agreement.
          Accordingly, these negative equity balances represent receivables from
          the Venturers;  the Venturers  provided  additional funding in 1999 to
          pay these amounts.

          The Joint  Venture  leases  space for research  and  development  from
          Genzyme. The current lease agreement is for the three-year period that
          commenced on July 1, 1998,  and  terminates  on June 30, 2001,  for an
          annual amount of $364,164.

                                    - F-24 -

<PAGE>


                               DIACRIN/GENZYME LLC
                        (A Development Stage Enterprise)

                    NOTES TO FINANCIAL STATEMENTS, CONTINUED


          The Joint Venture incurred $610,392 of rent expense for the year ended
          December  31,  1998,  and  expects  to incur  $364,164,  $364,164  and
          $151,735  in the years  ending  December  31,  1999,  2000,  and 2001,
          respectively.



D.     Property and Equipment:

       Property and equipment is stated at cost. At December 31, 1998,  property
       and equipment consisted of the following:



Lab equipment                                           $        166,820
Computer equipment                                                71,991
Leasehold improvements                                            27,608
Furniture and fixtures                                            12,963
                                                        --------------------

                                                                 279,382
Less: accumulated depreciation                                   (59,218)
                                                        --------------------

Property and equipment, net                             $        220,164
                                                        ====================


       Depreciation expense was $37,625 and $59,218, for the year ended December
       31,  1998 and the period  from  October 1, 1996  (date of  inception)  to
       December 31, 1998, respectively.



E.     Subsequent Event:

       In March 1999,  Genzyme announced plans to reallocate its interest in the
       Joint Venture from GTR to the Genzyme General  Division.  The transfer of
       the interest is subject to the approval of GTR shareholders.


                                    - F-25 -






                                                                      Exhibit 21

                         Subsidiaries of the Registrant


                                                                JURISDICTION OF
        NAME                       OWNERSHIP                     INCORPORATION
  ----------------                -----------                   ---------------
 Diacrin/Genzyme LLC                  50%                        Massachusetts







                                                                    Exhibit 23.1

                    Consent of Independent Public Accountants



     As independent public  accountants,  we hereby consent to the incorporation
of our report  included in this Form 10-K, into the Company's  previously  filed
Registration  Statement File Nos.  33-80773,  333-19571,  333-19573,  333-19615,
333-31541 and 333-47825.


Arthur Andersen LLP

Boston, Massachusetts
March 26, 1999




                                                                    Exhibit 23.2

                     CONSENT OF INDEPENDENT ACCOUNTANTS


We consent to the  incorporation by reference in the registration  statements of
Diacrin,  Inc.  on Form S-8  (File  Nos.  333-19571,  333-19573,  333-19615  and
333-31541)  and on Form  S-3  (33-80773  and  333-47825)  of our  report,  dated
February 12, 1999,  except as to the information  presented in Note E, for which
the  date is  March  4,  1999,  on our  audit  of the  financial  statements  of
Diacrin/Genzyme LLC, as of December 31, 1998, and for the period from October 1,
1996 (date of inception) to December 31, 1998,  which report is included in this
Annual Report on Form 10-K.


                                                      PricewaterhouseCoopers LLP

Boston, Massachusetts
March 30, 1999




<TABLE> <S> <C>

<ARTICLE>                          5
<CURRENCY>                         US DOLLARS
       
<S>                                <C>
<PERIOD-TYPE>                      YEAR
<FISCAL-YEAR-END>                  DEC-31-1998
<PERIOD-START>                     JAN-01-1998
<PERIOD-END>                       DEC-31-1998
<EXCHANGE-RATE>                    1
<CASH>                             4,995,054
<SECURITIES>                       18,670,392
<RECEIVABLES>                      0
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<DEPRECIATION>                     1,199,673
<TOTAL-ASSETS>                     27,483,874
<CURRENT-LIABILITIES>              2,247,563
<BONDS>                            391,702
              0
                        0
<COMMON>                           143,272
<OTHER-SE>                         24,701,337
<TOTAL-LIABILITY-AND-EQUITY>       27,483,874
<SALES>                            0
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<CGS>                              0
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<OTHER-EXPENSES>                   7,371,385
<LOSS-PROVISION>                   0
<INTEREST-EXPENSE>                 89,135
<INCOME-PRETAX>                    (4,829,950)
<INCOME-TAX>                       0
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