Discovery of a Small-Molecule Degrader of Bromodomain and Extra-Terminal (BET) Proteins with Picomolar Cellular Potencies and Capable of Achieving Tumor Regression
作者:Bing Zhou、Jiantao Hu、Fuming Xu、Zhuo Chen、Longchuan Bai、Ester Fernandez-Salas、Mei Lin、Liu Liu、Chao-Yie Yang、Yujun Zhao、Donna McEachern、Sally Przybranowski、Bo Wen、Duxin Sun、Shaomeng Wang
DOI:10.1021/acs.jmedchem.6b01816
日期:2018.1.25
BET protein degradation. Herein, we present our design, synthesis, and evaluation of a new class of PROTAC BET degraders. One of the most promising compounds, 23, effectively degrades BRD4 protein at concentrations as low as 30 pM in the RS4;11 leukemia cell line, achieves an IC50 value of 51 pM in inhibition of RS4;11 cell growth and induces rapid tumor regression in vivo against RS4;11 xenograft tumors
由BRD2,BRD3,BRD4和睾丸特异的BRDT成员组成的溴结构域和末端外(BET)家族蛋白是表观遗传“阅读器”,并在基因转录的调控中起关键作用。BET蛋白被认为是癌症和其他人类疾病的有吸引力的治疗靶标。近来,基于蛋白水解靶向嵌合体(PROTAC)概念已经设计了异双功能小分子BET降解物以诱导BET蛋白降解。本文中,我们介绍了新型PROTAC BET降解剂的设计,合成和评估。最有希望的化合物之一23在RS4; 11白血病细胞系中以低至30 pM的浓度有效降解BRD4蛋白,在抑制RS4; 11细胞生长方面达到51 pM的IC50值,并诱导快速的肿瘤消退。体内针对RS4;11种异种移植肿瘤。这些数据确定了化合物23(BETd-260 / ZBC260)是高效且有效的BET降解剂。