作者:Milan Bruncko、Thorsten K. Oost、Barbara A. Belli、Hong Ding、Mary K. Joseph、Aaron Kunzer、Darlene Martineau、William J. McClellan、Michael Mitten、Shi-Chung Ng、Paul M. Nimmer、Tilman Oltersdorf、Cheol-Min Park、Andrew M. Petros、Alexander R. Shoemaker、Xiaohong Song、Xilu Wang、Michael D. Wendt、Haichao Zhang、Stephen W. Fesik、Saul H. Rosenberg、Steven W. Elmore
DOI:10.1021/jm061152t
日期:2007.2.1
Overexpression of the antiapototic proteins Bcl-2 and Bcl-xL provides a common mechanism through which cancer cells gain a survival advantage and become resistant to conventional chemotherapy. Inhibition of these prosurvival proteins is an attractive strategy for cancer therapy. We recently described the discovery of a selective Bcl-xL antagonist that potentiates the antitumor activity of chemotherapy and radiation. Here we describe the use of structure-guided design to exploit a deep hydrophobic binding pocket on the surface of these proteins to develop the first dual, subnanomolar inhibitors of Bcl-xL and Bcl-2. This study culminated in the identification of 2, which exhibited EC50 values of 8 nM and 30 nM in Bcl-2 and Bcl-xL dependent cells, respectively. Compound 2 demonstrated single agent efficacy against human follicular lymphoma cell lines that overexpress Bcl-2, and efficacy in a murine xenograft model of lymphoma when given both as a single agent and in combination with etoposide.