Threshold Pharmaceuticals Announces Promising Early Phase 1 Clinical Trial Results

Threshold Pharmaceuticals, Inc. THLD, today announced a preclinical collaboration with the MD Anderson Cancer Center and early Phase 1 clinical trial results of TH-302 in patients with advanced leukemias, which is also taking place at MD Anderson. TH-302 is a proprietary Hypoxia-Activated Prodrug (HAP) that specifically targets tumor hypoxia. The objectives of the Phase 1 trial are to determine the maximum tolerated dose (MTD), dose limiting toxicity (DLT), safety, tolerability, clinical activity and pharmacokinetics of TH-302 in patients with advanced leukemia. Eleven patients with either acute myelogenous leukemia (AML) or acute lymphoblastic leukemia (ALL) have been enrolled in the trial to date. The starting dose in the trial was 120mg/m2 daily for 5 days of a 21-day cycle.