The invention provides novel derivatives of cyclopamine having the following formula:
wherein the nature of the moieties R1, R2, R3, R4, R7, R7', R8 and R9 is defined in appended claim 1.
Discovery of a Potent and Orally Active Hedgehog Pathway Antagonist (IPI-926)
作者:Martin R. Tremblay、André Lescarbeau、Michael J. Grogan、Eddy Tan、Grace Lin、Brian C. Austad、Lin-Chen Yu、Mark L. Behnke、Somarajan J. Nair、Margit Hagel、Kerry White、James Conley、Joseph D. Manna、Teresa M. Alvarez-Diez、Jennifer Hoyt、Caroline N. Woodward、Jens R. Sydor、Melissa Pink、John MacDougall、Matthew J. Campbell、Jill Cushing、Jeanne Ferguson、Michael S. Curtis、Karen McGovern、Margaret A. Read、Vito J. Palombella、Julian Adams、Alfredo C. Castro
DOI:10.1021/jm900305z
日期:2009.7.23
Recent evidence suggests that blocking aberrant hedgehog pathway signaling may be a promising therapeutic strategy for the treatment of several types of cancer. Cyclopamine, a plant Veratrum alkaloid, is a natural product antagonist of the hedgehog pathway. In a previous report, a seven-membered D-ring semisynthetic analogue of cyclopamine, IPI-269609 (2), was shown to have greater acid stability and better aqueous solubility compared to cyclopamine. Further modifications of the A-ring system generated three series of analogues with improved potency and/or Solubility. Lead compounds from each series were characterized in vitro and evaluated in vivo for biological activity and pharmacokinetic properties. These studies led to the discovery of IPI-926 (compound 28), a novel semisynthetic cyclopamine analogue with substantially improved pharmaceutical properties and potency and a favorable pharmacokinetic profile relative to cyclopamine and compound 2. As a result, complete tumor regression was observed in a Hh-dependent medulloblastoma allograft model after daily oral administration of 40 mg/kg of compound 28.
CYCLOPAMINE ANALOGS
申请人:Austad Brian
公开号:US20080293754A1
公开(公告)日:2008-11-27
The invention provides novel derivatives of cyclopamine having the following formula: