Data Presented at AACR Annual Meeting Shows Bavituximab Equivalent Plus Docetaxel Reduces Tumor Growth By Up to 95% and Halts Metastasis in a Model of Hormone-Refractory Prost...( -No Metastatic Lesions Were Detectabl...),Health

-No Metastatic Lesions Were Detectable After Combination Therapy Treatment-

-Survival Time More Than Doubled in Animals Treated with Combination

Therapy- -Established Tumors Regressed by 50% After Combination Therapy Treatment-

SAN DIEGO and TUSTIN, Calif., April 15 /PRNewswire-FirstCall/ -- Peregrine Pharmaceuticals, Inc. (Nasdaq: PPHM), a clinical stage biopharmaceutical company developing targeted monoclonal antibodies for the treatment of cancer and hepatitis C virus (HCV) infection, today announced that preclinical data presented at the 2008 Annual Meeting of the American Association for Cancer Research (AACR) shows that a mouse equivalent of Peregrine's anti-phosphatidylserine (anti-PS) vascular targeting antibody bavituximab administered in combination with the chemotherapeutic agent docetaxel demonstrated excellent signs of efficacy in a preclinical model of hormone-refractory prostate cancer. These new data confirm and extend the results of previous studies of Peregrine's anti-PS antibodies in models of prostate cancer. They were described by researchers in an oral presentation at the AACR Annual Meeting at 2:10pm PDT on April 14, 2008 in San Diego, California.

Dr. Yi Yin, a postdoctoral researcher in the laboratory of Dr. Philip Thorpe, professor of pharmacology at the University of Texas Southwestern Medical Center at Dallas, reported that in a mouse model of hormone-refractory prostate cancer, the combination of the bavituximab equivalent antibody 2aG4 and the chemotherapy drug docetaxel significantly decreased the growth of tumors, eliminated detectable metastases and prevented tumor re-growth. This increase in anti-tumor efficacy and anti-metastatic activity was achieved w
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