GTx Announces Removal Of Full Clinical Hold By FDA For Capesaris® In Advanced Prostate Cancer

GTx, Inc. (Nasdaq: GTXI) announced today that the Food and Drug Administration (FDA) removed its Full Clinical Hold on the Company’s Investigational New Drug application for Capesaris ® following the review by the FDA of the Company’s complete response and its new Phase II clinical protocol. GTx plans to initiate during the third quarter this Phase II open label clinical study of 75 men with metastatic castration resistant prostate cancer to test three lower doses of Capesaris (125 mg, 250 mg and 500 mg) sequentially in cohorts of 25 patients each.

The Phase II clinical study will evaluate the safety and efficacy of Capesaris as secondary hormonal therapy in men with metastatic castration resistant prostate cancer. The study will assess the effect of oral daily doses of Capesaris on serum prostate specific antigen response and prostate cancer progression in men with metastatic castration resistant prostate cancer maintained on primary androgen deprivation therapy (ADT). The study is also designed to provide confirmation of the mechanism of drug action for Capesaris on lowering serum free testosterone levels by increasing serum SHBG. Other key endpoints that will be evaluated in the study include effects on the levels of adrenal androgen precursors, as well as the incidence and frequency of hot flashes and bone loss, which are estrogen deficiency related side effects of ADT. The safety and tolerability of these lower doses of Capesaris will also be evaluated in these subjects, including the incidence of venous thromboembolic events.

Conference call

There will be a conference call today at 9:00 a.m. Eastern Time to discuss this press release and to provide a Company update. To listen to the conference call, please dial 800-299-6183 from the United States or Canada or 617-801-9713 from other international locations. The access code for the call is 32206083. A playback of the call will be available from approximately 11:00 a.m. Eastern Time today through May 22, 2012 and may be accessed by dialing 888-286-8010 from the United States or Canada or 617-801-6888 from other international locations and referencing reservation number 74903062. Additionally, you may access the live and subsequently archived webcast of the conference call from the Investor Relations section of the Company’s website at http://www.gtxinc.com.

About GTx

GTx, Inc., headquartered in Memphis, Tenn., is a biopharmaceutical company dedicated to the discovery, development and commercialization of small molecules that selectively target hormone pathways for the treatment of cancer, cancer supportive care, and other serious medical conditions.

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