Development of Glucose Regulated Protein 94-Selective Inhibitors Based on the BnIm and Radamide Scaffold
作者:Vincent M. Crowley、Anuj Khandelwal、Sanket Mishra、Andrew R. Stothert、Dustin J. E. Huard、Jinbo Zhao、Aaron Muth、Adam S. Duerfeldt、James L. Kizziah、Raquel L. Lieberman、Chad A. Dickey、Brian S. J. Blagg
DOI:10.1021/acs.jmedchem.6b00085
日期:2016.4.14
that was used to design isoform-selective inhibitors. Incorporation of a cis-amide bioisostere into the radamide scaffold led to development of the original Grp94-selective inhibitor, BnIm. Structure–activity relationship studies have now been performed on the aryl side chain of BnIm, which resulted in improved analogues that exhibit better potency and selectivity for Grp94. These analogues also manifest
葡萄糖调节蛋白94(Grp94)是分子伴侣蛋白的热休克蛋白90 kDa(Hsp90)家族的内质网居民。Grp94与许多参与细胞黏附和信号传导的蛋白质相关,包括整联蛋白,Toll样受体,免疫球蛋白和突变型myocilin。Grp94被认为是包括青光眼,癌症转移和多发性骨髓瘤在内的多个治疗领域的靶标。虽然与其他Hsp90同工型具有85%的相同性,但Grp94的N末端ATP结合位点具有一个独特的疏水性口袋,该口袋用于设计同工型选择性抑制剂。合并顺式-酰胺生物甾体进入radamide支架导致了最初的Grp94选择性抑制剂BnIm的开发。现在已经对BnIm的芳基侧链进行了结构-活性关系研究,从而得到了改进的类似物,对Grp94表现出了更好的效价和选择性。与BnIm相比,这些类似物在转移模型中还表现出优异的抗迁移活性,并且在青光眼模型中还表现出增强的突变型肌球蛋白降解。