Substitution at the indole 3 position yields highly potent indolecombretastatins against human tumor cells
作者:Raquel Álvarez、Consuelo Gajate、Pilar Puebla、Faustino Mollinedo、Manuel Medarde、Rafael Peláez
DOI:10.1016/j.ejmech.2018.08.078
日期:2018.10
(TPI) and cytotoxicity against human cancer cell lines but cyano, methoxycarbonyl, formyl, and hydroxyiminomethyl substitutions at the indole 3-position restores potent TPI and cytotoxicity against sensitive human cancer cell lines. These highly potent substituted derivatives displayed low nanomolar cytotoxicity against several human cancer cell lines due to tubulin inhibition, as shown by cell cycle analysis
对康维他汀A-4的抗性是通过3-羟基-4-甲氧基苯基(B环)的酚羟基和醚基的代谢修饰介导的。用N取代康普他汀A-4的B环-甲基-5-吲哚基降低了微管蛋白聚合抑制(TPI)和对人癌细胞系的细胞毒性,但吲哚3位上的氰基,甲氧基羰基,甲酰基和羟基亚氨基甲基取代恢复了对敏感的人癌细胞系的强效TPI和细胞毒性。如细胞周期分析,共聚焦显微镜和微管蛋白聚合抑制活性研究所示,由于微管蛋白的抑制作用,这些高效取代衍生物对几种人类癌细胞系均表现出较低的纳摩尔细胞毒性,并通过caspase-3激活促进了细胞杀伤作用。分子模型研究表明在秋水仙碱位点的结合。取代的combrestastatins显示出比同分异构combretastatins高的效力,并且羟基亚氨基甲基(21)和氰基(23)组,TPI值在亚微摩尔范围内,而细胞毒性则在纳摩尔和亚纳摩尔范围内。剂量反应和时程研究表明,药物浓度低至1 nM(23)或10 nM(21)导致15