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Eisai And Halozyme Initiate Phase 1b/2 Clinical Trial With First Patient Dosing Of Eribulin In Combination With PEGPH20

SAN DIEGO, July 26, 2016 /PRNewswire/ -- Halozyme Therapeutics, Inc. (HALO) announced today that Eisai Inc. has dosed the first patient in a collaborative phase 1b/2 clinical trial to assess whether Eisai's eribulin mesylate (HALAVEN®) in combination with Halozyme's investigational drug PEGPH20 (PEGylated recombinant human hyaluronidase) can improve overall response rate (ORR) – the proportion of women that have a predefined reduction in tumor burden – as compared with eribulin alone as a therapy in women with advanced or metastatic, High-Hyaluronan (HA) HER2-negative breast cancer.

"Initiation of this study is not only a major milestone in our collaboration with Eisai, it underscores our combined focus on advancing the treatment of metastatic breast cancer—one of the most common cancers in women worldwide," said Dr. Helen Torley, president and chief executive officer.

PEGPH20 is an investigational drug administered intravenously that targets the degradation of HA, a glycosaminoglycan – or chain of natural sugars throughout the body – that can accumulate around cancer cells to inhibit other therapies. Eribulin, a synthetic analog of halichondrin B, a natural product that was isolated from the marine sponge Halichondria okadai, is a microtubule dynamics inhibitor with a distinct binding profile that has been shown in in vitro studies to lead to apoptotic cell death after prolonged and irreversible mitotic blockage. In HA-high triple-negative breast...