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Peregrine reports new study from Duke shows anti-HIV potential of targeting PS on cells
Date:4/5/2010

Peregrine Pharmaceuticals, Inc. (Nasdaq: PPHM) today announced the publication of data showing phosphatidylserine (PS)-targeting antibodies can block one of the key ways the AIDS virus gains entry into certain blood cells. The data were generated by scientists at Duke University as part of their ongoing AIDS vaccine research. The article titled "Anti-Phospholipid Human Monoclonal Antibodies Inhibit CCR5-Tropic HIV-1 and Induces β-Chemokines" is available online today and will be published in the April 12, 2010 edition of the Journal of Experimental Medicine. Peregrine's PS-targeting antibodies are currently in clinical development for the treatment of cancer and HCV infections.

In early stage in vitro studies reported by Dr. Anthony Moody of Duke University, lead author of the publication, PS-targeting antibodies developed or licensed by Peregrine blocked HIV from docking with its most commonly used entry point into blood cells--the CCR5 receptor. The antibodies accomplished this indirectly, by binding to white blood cells called monocytes and causing them to secrete proteins called chemokines, which have the ability to block entry of HIV into the cell. In the presence of monocytes, the antibodies prevented HIV infection in vitro 85% of the time in these studies.

Investigators believe the finding has particular strategic importance because most HIV strains use the CCR5 receptor to gain entry into a cell. In addition, it is one of the earliest events in the process of infection, so being able to intervene at this juncture could potentially be clinically useful.

Dr. Philip Thorpe, professor of pharmacology at UT Southwestern Medical Center, a pioneer in the development of PS-targeting therapies and an author of the new publication commented, "This study from our colleagues at Duke University illuminates another intriguing aspect of phospholipid-targeting antibodies--the diversity of their anti-viral mechanisms and broa
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Contact: Barbara Lindheim
blindheim@biocompartners.com
212-918-4650
BioCom Partners
Source:Eurekalert

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