Discovery of Potent and Selective Leads against <i>Toxoplasma gondii</i> Dihydrofolate Reductase via Structure-Based Design
作者:Matthew E. Welsch、Jian Zhou、Yueqiang Gao、Yunqing Yan、Gene Porter、Gautam Agnihotri、Yingjie Li、Henry Lu、Zhongguo Chen、Stephen B. Thomas
DOI:10.1021/acsmedchemlett.6b00328
日期:2016.12.8
the design of inhibitors with both improved potency and selectivity. The approach described herein yielded TRC-19, a promising lead with an IC50 of 9 nM and 89-fold selectivity in favor of Toxoplasma gondii DHFR, as well as crystallographic data to substantiate in silico methodology. Overall, 50% of synthesized in silico designs met hit threshold criteria of IC50 < 10 μM and >2-fold selectivity favoring
弓形虫病的当前治疗通过抑制二氢叶酸还原酶(DHFR)靶向寄生虫的叶酸代谢。最广泛使用的DHFR拮抗剂嘧啶胺是60年前引入的,与毒性相关,在很大程度上可归因于对寄生虫和人DHFR的相似亲和力。弓形虫和人类DHFR之间的生化差异的计算分析使设计的抑制剂具有更高的效能和选择性。本文描述的方法产生了TRC-19,这是一种有前途的潜在客户,其IC 50为9 nM,选择性为弓形虫DHFR的89倍,并提供了晶体学数据以证实计算机模拟方法的正确性。总体而言,合成的50%在计算机设计中,符合IC 50 <10μM且达到2倍选择性的命中阈值标准有利于弓形虫,进一步证明了我们基于结构的药物设计方法的效率。