REDWOOD CITY, Calif., April 17, 2017 (GLOBE NEWSWIRE) -- OncoMed Pharmaceuticals, Inc. (Nasdaq:OMED), a clinical-stage biopharmaceutical company focused on discovering and developing novel anti-cancer stem cell and immuno-oncology therapeutics, today reported top-line results from the company's randomized 145-patient Phase 2 PINNACLE clinical trial of tarextumab (anti-Notch2/3, OMP-59R5) in combination with etoposide plus either cisplatin or carboplatin chemotherapy ("chemotherapy") in previously untreated patients with extensive-stage small cell lung cancer. Results for the combination of tarextumab plus chemotherapy were undifferentiated from those of chemotherapy plus placebo, and therefore the trial did not meet its primary endpoint of progression-free survival or secondary endpoints of overall survival and biomarkers reflective of Notch pathway gene activation.
"Small cell lung cancer is a very difficult-to-treat disease and unfortunately, tarextumab did not show benefit over placebo in this Phase 2 trial," said Paul J. Hastings, OncoMed's Chairman and CEO. "We deeply appreciate the participation by the investigators and staff, patients and caregivers who all contributed to the conduct and completion of this Phase 2 clinical trial."
OncoMed also announced today that it will discontinue enrollment in the Phase 1b clinical trial of brontictuzumab (anti-Notch1, OMP-52M51) in combination with trifluridine/tipiracil (Lonsurf®) in third-line colorectal cancer patients. The combination of brontictuzumab plus chemotherapy was not tolerable in this patient population.
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