OXiGENE, Inc. Registration Statement Filed with SEC
            to Extend Expiration Date of Warrants Declared Effective

     BOSTON,  MA AND LUND,  SWEDEN -- JULY 24,  1998 -- OXiGENE,  Inc.  (Nasdaq:
OXGN) today announced that the Company's  registration statement relating to the
Company's publicly traded warrants (Nasdaq:  OXGNW)(the "Warrants") was declared
effective by the Securities and Exchange Commission.

     As more fully set forth in the registration statement,  the following terms
of the  Warrants  have been  amended or added:  (a) at 5:00 p.m.,  New York City
time, on August 26, 1998,  with no action required to be taken by the holders of
the  Warrants,  the  original  expiration  date of the Warrants  (the  "Original
Expiration Date") will be extended to 5:00 p.m., New York City time, on December
31, 1999 (the "Amended  Expiration Date"), (b) each Warrant shall be exercisable
on and after August 26, 1998,  and until the Amended  Expiration  Date, for 1.07
shares of Common Stock at a price of $14.35 (i.e.,  the exercise price currently
in effect),  subject only to the adjustment  after that date in accordance  with
the  anti-dilution  provisions set forth in the Warrant Agreement (which are not
being amended),  and (c) the Company has the right,  but not the obligation,  at
any time after the Original Expiration Date, to redeem, at any time or from time
to time, any or all of the Warrants (the "Call"); provided, however, the Company
may exercise the Call only if (i) the average trading price of the shares of the
Company's  Common Stock,  as reported by the National Market of The Nasdaq Stock
Market,  Inc.  ("Nasdaq"),  for any period of ten consecutive  trading days (not
including  any days on which the  Nasdaq is open for  trading,  but there are no
purchases  or sales of Common  Stock),  has  traded at not less than  $16.00 per
share,  and (ii) the Company has given not less than 20 days  written  notice to
the holders of Warrants  indicating the Company's election to exercise the Call.
Following a Call,  any Warrants that were called that remain  unexercised at the
end of the 20-day  notice  period  will be  redeemed  promptly  thereafter  at a
redemption price of $.001 per Warrant, payable by the Company in cash.

     A copy of the  prospectus  relating  to the  amendment  of the terms of the
Warrants may be obtained from:  Innisfree M&A  Incorporated  ("Innisfree"),  501
Madison Avenue, 20th Floor, New York, New York 10022, (888) 750-5834.  A copy of
the final  prospectus  will be available from Innisfree  following the effective
date of the registration  statement.  Shareholders with questions are encouraged
to contact  Innisfree toll free at (888) 750-5834 (within the continental  U.S.)
or (212) 750-5833 (outside of the U.S.).

     OXiGENE,  Inc. is an international  biopharmaceutical  company developing a
portfolio of products that focuses primarily on combating cancer.  The Company's
initial product  development is based on proprietary DNA repair technology.  The
Company  currently  has  three  product  candidates  in  clinical   development.
Neu-Sensamide(TM),  a  radiosensitizer,  is in a Phase  III  clinical  trial  in
patients  with  non-small  cell lung  cancer and two Phase I studies in patients
with  glioblastoma.  Oxi-104 is being developed as a chemosensitizer  in Phase I
studies in patients with  advanced  stage  cancers.  Cordycepin is a compound in
Phase I studies in  patients  with TdT  positive  leukemia.  The Company is also
developing  Combretastatin A-4 phosphate,  a tumor vascular targeting agent that
in  pre-clinical  studies  destroyed  the blood  vessels  that enable a tumor to
survive and grow.  Combretastatin  is expected to enter  clinical  trials in the
second half of 1998.

     This  press  release  shall  not   constitute  an  offer  to  sell  or  the
solicitation of an offer to buy nor shall there by any sale of these  securities
in any State or  country  in which  such  offer,  solicitation  or sale would be
unlawful prior to the registration or qualification under the securities laws of
any such state or country.

    SOURCE:  OXiGENE, Inc.

    CONTACT: Innisfree M&A Incorporated                  Ms. Sarah Michelmore
             501 Madison Avenue, 20th Floor       or     Feinstein Kean Partners
             New York, New York  10022                   245 First Street
             (888) 750-5834 in the U.S.                  14th Floor
             (212) 750-5833 outside the U.S.             Boston, MA  02142
                                                         (617) 577-8110