Identification of Non-Nucleoside Inhibitors of the Respiratory Syncytial Virus Polymerase Complex
作者:Alberto Jiménez-Somarribas、Shuli Mao、Jeong-Joong Yoon、Marco Weisshaar、Robert M. Cox、Jose R. Marengo、Deborah G. Mitchell、Zachary P. Morehouse、Dan Yan、Ivan Solis、Dennis C. Liotta、Michael G. Natchus、Richard K. Plemper
DOI:10.1021/acs.jmedchem.6b01568
日期:2017.3.23
Respiratory syncytial virus (RSV) represents a threat to infants, the elderly, and the immunocompromised. RSV entry blockers are in clinical trials, but escape mutations challenge their potential. In search of RSV inhibitors, we have integrated a signature resistance mutation into a recombinant RSV virus and applied the strain to high-throughput screening. Counterscreening of candidates returned 14
呼吸道合胞病毒(RSV)对婴儿,老年人和免疫力低下者构成威胁。RSV进入阻滞剂正在临床试验中,但是逃逸突变挑战了其潜力。为了寻找RSV抑制剂,我们已经将特征抗性突变整合到重组RSV病毒中,并将该菌株应用于高通量筛选。对候选物的反筛选返回了从纳摩尔到低微摩尔范围内有活性的14支经确认的命中。在微型基因组测定中,所有受阻的RSV聚合酶活性均被阻止。根据活性选择化合物1a(GRP-74915)进行开发(EC 50= 0.21μM,选择性指数(SI)40)和支架。重新合成证实了该化合物的效力,它抑制了感染细胞中病毒RNA的合成。但是,代谢测试显示在小鼠肝细胞组分存在下半衰期很短。代谢物跟踪和化学精制结合3D定量的结构-活性关系模型,产生了类似物(即8n:EC 50 = 0.06μM,SI 500),为开发候选药物建立了平台。