REDWOOD CITY, Calif., May 6, 2010 (GLOBE NEWSWIRE) -- Threshold Pharmaceuticals, Inc. (Nasdaq:THLD) today announced the appointment of Eric Malek as Vice President, Corporate Development. Mr. Malek joins Threshold as a member of the senior management team and will lead business development, strategy and planning with an initial focus on partnering the Company’s clinical stage hypoxia activated prodrug, TH-302.