REDWOOD CITY, Calif., Nov. 6, 2009 (GLOBE NEWSWIRE) -- Threshold Pharmaceuticals, Inc. (Nasdaq:THLD) today announced clinical trial results related to Threshold’s clinical stage hypoxia-activated prodrug, TH-302. The results were presented at the 15th Annual Connective Tissue Oncology Society (CTOS) Meeting taking place in Miami Beach, Florida from November 5 to 7, 2009.