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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Deforolimus (also known as AP23573 and MK-8669) is an immunosupressant currently undergoing research for the treatment of certain cancers. It is a small-molecule inhibitor of the mammalian target of rapamycin (mTOR). Blocking mTOR creates a starvation-like effect in cancer cells by interfering with cell growth, division, metabolism, and angiogenesis.

Deforolimus is being co-developed by Merck and ARIAD Pharmaceuticals. As of 2008, a phase III clinical trial of deforolimus in metastatic soft-tissue and bone sarcomas responsive to chemotherapy, SUCCEED (Sarcoma Multi-Center Clinical Evaluation of the Efficacy of Deforolimus), is recruiting patients.[1][2]


  1. "SUCCEED: Landmark Global Phase 3 Trial Now Enrolling!". ARIAD Pharmaceuticals. 2008. Retrieved 2008-04-18.
  2. Deforolimus (AP23573) in Treatment of Sarcoma - SUCCEED (Sarcoma Multi-Center Clinical Evaluation of the Efficacy of Deforolimus) Study. (2008-03-07). Retrieved on 2008-04-18.

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