Threshold Pharmaceuticals to Present at Stifel Nicolaus Healthcare Conference

REDWOOD CITY, CA--(Marketwire - Sep 2, 2011) - Threshold Pharmaceuticals, Inc. (NASDAQ: THLD) today announced that Dr. Barry Selick, Threshold's Chief Executive Officer, is scheduled to present at the Stifel Nicolaus Healthcare Conference in Boston on Friday, September 9, 2011 at 8:35AM EDT.

A Live webcast of the presentation will be available under the Webcast section of the Company's Website.

About Threshold Pharmaceuticals

Threshold is a biotechnology company focused on the discovery and development of drugs targeting Tumor Hypoxia, the low oxygen condition found in microenvironments of most solid tumors as well as the bone marrows of some hematologic malignancies. This approach offers broad potential to treat a variety of cancers. By selectively targeting tumor cells, we are building a pipeline of drugs that hold promise to be more effective and less toxic to healthy tissues than conventional anticancer drugs. For additional information, please visit our website (www.thresholdpharm.com).