Development of Dihydrodibenzooxepine Peroxisome Proliferator-Activated Receptor (PPAR) Gamma Ligands of a Novel Binding Mode as Anticancer Agents: Effective Mimicry of Chiral Structures by Olefinic <i>E</i>/<i>Z</i>-Isomers
作者:Keisuke Yamamoto、Tomohiro Tamura、Kazuki Henmi、Takeshi Kuboyama、Arata Yanagisawa、Masahiro Matsubara、Yuichi Takahashi、Michihiko Suzuki、Jun-ichi Saito、Kimihisa Ueno、Satoshi Shuto
DOI:10.1021/acs.jmedchem.8b01200
日期:2018.11.21
conformational restriction by the methyl group at the chiral center. On the basis of this analysis, scaffold hopping of dibenzoazepine into dibenzo[b,e]oxepine by replacing the chiral structures with the corresponding olefinic E/Z isomers was performed. Consequently, dibenzo[b,e]oxepine scaffold 9 was developed showing extremely potent PPARγ reporter activity (EC50 = 2.4 nM, efficacy = 9.5%) as well as diff
通过高通量筛选活动鉴定了具有二苯并a杂骨架的新型PPARγ配体1(EC 50 = 197 nM)。为了避免的麻烦的合成手性中心1,使用宏模型其构象分析进行,着眼于三环的构象翻转和构象限制由甲基在手性中心。基于该分析,通过用相应的烯烃E / Z异构体代替手性结构,将二苯并a庚因脚手架跳制成二苯并[ b,e ]氧杂环丁烷。因此,二苯并[ b,e] oxepine支架9的开发显示出极强的PPARγ报告基因活性(EC 50 = 2.4 nM,功效= 9.5%),以及对胃癌细胞系MKN-45的分化诱导活性,该活性比任何其他知名技术更强体外PPARγ激动剂(30 nM时为94%)。X射线晶体结构分析9与PPARγ的复合物表明,它与PPARγ配体的结合域具有独特的结合模式,与迄今为止确定的任何其他PPARγ激动剂不同。