Ext. 99.1

              PEREGRINE AND OXiGENE CONCLUDE ARCUS THERAPEUTICS LLC
                                  JOINT VENTURE

  Companies reacquire full rights to respective vascular targeting technologies

TUSTIN, Calif. and WATERTOWN, Mass., February 28, 2002 -- OXiGENE, Inc. (Nasdaq:
OXGN,  SSE:  OXGN) and  Peregrine  Pharmaceuticals,  Inc.  (Nasdaq:  PPHM) today
announced an agreement to conclude their Arcus  Therapeutics,  LLC joint venture
(Arcus). Under the terms of the agreement, Peregrine will pay OXiGENE $2,000,000
and will reacquire full rights and interest to the vascular  targeting  platform
it  contributed  to the joint  venture,  as well as any new  discoveries  to its
contributed  technology.  OXiGENE will reacquire full rights and interest to its
vascular  targeting  technology  including  any  new  discoveries  based  on its
contribution.  The joint venture will be concluded after all technology has been
distributed to its respective owners.

The Arcus joint venture,  which was formed in May 2000, was established to focus
on specialized  development of anti-cancer  compounds called vascular  targeting
agents (VTA).  VTAs work by attacking the existing  blood supply of solid tumors
and blocking the flow of blood to the cancer cells, resulting in an avalanche of
cancer cell death.  Peregrine and OXiGENE brought  different aspects of vascular
targeting  technology to the joint venture.  Peregrine is focused on coaguligand
antibody technology, vascular targeting agents that bind specifically to markers
in the tumor vasculature and create blood clots that cut off the blood supply to
the tumor.  OXiGENE  focuses on  development  of drugs that  change the shape of
cells within the tumor's  vascular  structure  thereby  blocking  blood flow and
reducing the blood supply to the tumor.

"By  concluding  Arcus,  OXiGENE will be able to dedicate more  resources to the
human  clinical  testing  of  its  most  advanced   vascular   targeting  agent,
Combretastatin A4 Prodrug," said Bjorn Nordenvall,  M.D., Ph.D., OXiGENE's chief
executive officer. "OXiGENE has successfully completed several Combretastatin A4
Prodrug Phase I human clinical trials involving nearly 100 patients.  We believe
the preliminary clinical results were very promising, so we intend to initiate a
Phase Ib clinical study in combination  with  chemotherapy  or radiation,  and a
Phase II  clinical  study this year.  We also  intend to  continue  pre-clinical
development of our next-generation vascular targeting agent, Oxi-4503."

"Peregrine  intends  to  focus  on the  licensing  of  its  VTA  technology  for
compound-specific  uses, thus maximizing the value of the technology  platform,"
said Edward  Legere,  Peregrine's  president and chief  executive  officer.  "As
previously  announced,  we will  continue to advance our existing  anti-vascular
compounds towards human clinical testing.  Significant progress has been made in
the  development of fully human vascular  targeting  antibody  candidates.  Once
these  human  antibody  candidates  are  developed,  we  intend to test them for
suitability in human clinical studies as vascular targeting agents."



About Peregrine Pharmaceuticals, Inc.

Peregrine   Pharmaceuticals  is  a  biopharmaceutical  company  focused  on  the
development,  commercialization,  and licensing of unique  technologies  for the
treatment of cancer, primarily based on its "collateral targeting technologies."
These  technologies  target cell structures and cell types that are common among
solid tumor cancers, giving them broad applicability across various tumor types.
In clinical and pre-clinical  studies,  collateral  targeting  technologies have
been shown to deliver  various  anti-cancer  compounds  selectively to the tumor
site without causing damage to surrounding  healthy tissue.  Copies of Peregrine
press releases, SEC filings, current price quotes and other valuable information
for    investors    may    be    found    on    the    company's    web    site,
http://www.peregrineinc.com.

About OXiGENE, Inc.

OXiGENE,  an  international  biopharmaceutical  company,  is the world leader in
vascular  targeting agents that destroy  existing blood vessels  associated with
cancerous  tumors,  and  which  may  have an  application  in the  treatment  of
restenosis,  certain  forms of ocular  disease  and other  conditions.  With its
flagship family of  Combretastatin-based  vascular targeting agents,  OXiGENE is
developing  a  diverse   portfolio  of  innovative   products  to  combat  these
conditions.  OXiGENE is using its proprietary  vascular targeting  technology to
develop new drugs that will  enhance the  effectiveness  of  traditional  cancer
treatments  and to introduce  innovative  therapies that attack cancer and other
diseases. For more information about OXiGENE, please visit www.oxigene.com.

This press release contains "forward-looking statements" which are made pursuant
to the safe harbor  provisions of the Securities  Litigation Reform Act of 1995.
Forward-looking  statements give our current expectations or forecasts of future
events and use words such as "intend,"  "anticipate,  " "estimate, " "believe, "
"could," "may," "expects," and other words of similar meaning,  as well as verbs
that reflect  future  tense.  These  statements  include  those  relating to the
intention  of  OXiGENE  and  Peregrine  to  conclude  the Arcus  joint  venture,
OXiGENE's plans to initiate Phase Ib clinical  trials and continue  pre-clinical
development of Oxi-453 and  Peregrine's  intention to license its technology and
advance  its  compounds  into  human  clinical  testing.   Any  or  all  of  the
forward-looking  statements  in this press  release may turn out to be wrong and
actual  results  could  differ  materially.  They can be affected by  inaccurate
assumptions  we might make or by known or unknown risks and  uncertainties  that
include,  but are not limited to, in the case of each of Peregrine  and OXiGENE,
the efficacy of the company's  technology and its efficacy at acceptable  dosage
levels,  the  ability  of the  company  to  raise  capital  when  needed  and on
reasonable terms,  successful  clinical trial results,  developing the necessary
manufacturing   processes  and  gaining  all  necessary  regulatory   approvals.
Consequently,  no forward-looking statement can be guaranteed and actual results
may vary materially.  Additional information concerning factors that could cause
the actual  results of Peregrine and OXiGENE to materially  differ from those in
the  forward-looking  statements  are  contained  in the  reports of OXiGENE and
Peregrine filed with the Securities and Exchange Commission  including 10-Q, 8-K
and 10-K reports.

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Peregrine Contacts:

Media:                                      Investor:
Alex Boese                                  Frank Hawkins
Atkins & Associates                         Hawk Associates, Inc.
(858) 860-0266                              (800) 987-8256
aboese@atkinsassociates.com                 http://www.hawkassociates.com

OXiGENE Contacts:

OXiGENE, Inc.                               Sharon Merrill Associates, Inc.
Tammy Bishop                                David Calusdian (Investors)
Director of Investor Relations and          Scott Solomon (Media)
Corporate Communications                    (617) 542-5300
(617) 673-7826                              dcalusdian@investorrelations.com
tbishop@oxigene.com                         ssolomon@investorrelations.com




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