Peregrine Pharma (PPHM) Presents Bavituximab Combo Phse 2 Data in HCC
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Peregrine Pharma (Nasdaq: PPHM) announced the presentation of clinical data related to the company's immuno-oncology development program and its lead investigational immunotherapy drug candidate bavituximab at the American Society of Clinical Oncology (ASCO) Gastrointestinal Cancers Symposium. This conference is being held January 15-17, 2015 at the Moscone West Convention Center in San Francisco, California.
The clinical presentation titled: "A Phase II Study of Bavituximab and Sorafenib in Advanced Hepatocellular Carcinoma (HCC)" will be presented this afternoon by Adam Yopp, M.D., assistant professor of surgery at the University of Texas Southwestern Medical Center Dallas, Texas.
In this single-center, single-arm, open-label investigator-sponsored trial (IST), 38 patients with advanced HCC received bavituximab (3mg/kg) weekly and sorafenib (400 mg) twice daily until disease progression or toxicity. Data show that the combination of bavituximab and sorafenib is associated with an improved time to progression (TTP) of 6.7 months, a disease specific survival (DSS) of 8.7 months, a disease control rate (DCR) of 58% (22 out of 38 patients) and a 4-month progression-free survival (PFS) of 62%. Two patients (5%) achieved a partial response according to Response Evaluation Criteria In Solid Tumors (RECIST). The secondary endpoint of median overall survival (OS) was 6.2 months. The combination of bavituximab and sorafenib was well-tolerated in patients with advanced HCC with no indications of autoimmune adverse events that have been seen with other checkpoint immunotherapies.
"These clinical outcomes of time to progression, disease control rate and 4-month progression-free survival are quite encouraging, especially in this heavily pretreated patient cohort with very poor prognosis due to their unfavorable disease biology including a high rate of macrovascular invasion," said Dr. Yopp. "I was also pleased to see an extended tail in the survival curve that is typical of emerging immunotherapies for cancer. The positive data from this study should be considered as rationale for future randomized trials to further evaluate the potential of bavituximab in liver cancer."
"These data, along with recently reported translational data from this study, continue to build the knowledge base for the bavituximab clinical program and, in particular, highlight the potential immunotherapeutic synergies of bavituximab and sorafenib. We agree with Dr. Yopp that these data warrant further clinical evaluation of this combination in later stage clinical trials," said Joseph Shan, vice president of clinical and regulatory for Peregrine. "We continue to build value in the bavituximab program across multiple programs including the execution of the SUNRISE Phase III trial in second-line, non-small cell lung cancer and from data generated from this and other investigator-sponsored trials as well as other ongoing clinical trials. We look forward to new clinical collaborations with the goal of further exploring the utility of bavituximab in combination with other immuno-oncology drugs."
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