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- W1997019712 abstract "YM155, a small-molecule survivin suppressant, exhibits anti-tumor activities in vitro, in vivo and in clinical trials. However, the mechanism of YM155 action remains unclear. In this study, YM155 was administered to a panel of cell lines and the effects of YM155 on Bcl-2 family members were analyzed. Our results show that YM155 strikingly downregulates Mcl-1 in a broad spectrum of cancer cell lines and that the Mcl-1 modulation occurs at the transcriptional level, independently of survivin modulation or caspase activity. Furthermore, analysis of the contribution of Mcl-1 or survivin downregulation to YM155-induced cell death in vitro showed that knockdown of Mcl-1 sensitizes cells to YM155-induced cytotoxicity. Finally, our data demonstrate that downregulation of Mcl-1 by YM155 synergistically lowers the threshold of Bcl-2 family member inhibitor ABT-263-induced cell death. Our findings reveal a novel mechanism by which survivin-independent Mcl-1 suppression plays a critical role in YM155-mediated anti-tumor activities. YM155 treatment in combination with ABT-263 thus affords a new strategy for cancer treatment." @default.
- W1997019712 created "2016-06-24" @default.
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- W1997019712 date "2011-11-01" @default.
- W1997019712 modified "2023-10-16" @default.
- W1997019712 title "Mcl-1 downregulation by YM155 contributes to its synergistic anti-tumor activities with ABT-263" @default.
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- W1997019712 doi "https://doi.org/10.1016/j.bcp.2011.07.064" @default.
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