REDWOOD CITY, Calif., Nov. 18, 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 yesterday at the AACR-NCI-EORTC International Conference on Molecular Targets and Cancer Therapeutics being held November 15 to 19, 2009, in Boston, MA.