REDWOOD CITY, Calif., Oct. 12, 2010 (GLOBE NEWSWIRE) -- Threshold Pharmaceuticals, Inc. (Nasdaq:THLD) today announced interim results from an ongoing Phase 1/2 clinical trial in various solid tumors related to its hypoxia-activated prodrug, TH-302. The results were presented at the European Society for Medical Oncology (ESMO) Annual Meeting being held in Milan, Italy.