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Peregrine Pharmaceuticals Awarded Two New U.S. Patents Broadening Its Targeted Anti-Phospholipid Patent Portfolio
Date:6/16/2008

- New Claims Cover Anti-Viral Applications of Novel Targeted Agents Under

the Company's Anti-Phospholipid Technology Platform - - Anti-Viral Potential of These New Agents Supported by Recent Studies

Presented at American Association of Immunologists Annual Meeting -

TUSTIN, Calif., June 16 /PRNewswire-FirstCall/ -- Peregrine Pharmaceuticals, Inc. (Nasdaq: PPHM), a clinical stage biopharmaceutical company developing monoclonal antibodies for the treatment of cancer and hepatitis C virus infection (HCV), today reported the issuance of two U.S. patents that significantly broaden the company's intellectual property leadership in the field of targeted anti-aminophospholipid agents. The new patents grant Peregrine broad anti-viral method claims using a range of phosphatidylethanolamine (PE) binding agents, including PE-binding peptides attached to anti-viral agents as well as those conjugated to antibodies or other substances.

"These are significant patents for Peregrine that substantially expand our intellectual property portfolio in the field of aminophospholipid-targeting agents," said Dr. Shelley Fussey, vice president of intellectual property at Peregrine. "These anti-PE agents appear to have anti-viral properties similar to the anti-phosphatidylserine (PS) monoclonal antibody bavituximab that we currently are testing in clinical trials in HCV patients and in preclinical studies for HIV and other viral infections. We are especially pleased at the breadth of the issued claims, which provide Peregrine with U.S. patent coverage for methods of combating all relevant viruses using the claimed anti-PE peptide conjugates, either used alone or in combination with other anti-viral drugs. As peptide conjugates, anti-
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SOURCE Peregrine Pharmaceuticals, Inc.
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