Hepatitis C Virus NS3/4A Protease Inhibitors Incorporating Flexible P2 Quinoxalines Target Drug Resistant Viral Variants
作者:Ashley N. Matthew、Jacqueto Zephyr、Caitlin. J. Hill、Muhammad Jahangir、Alicia Newton、Christos J. Petropoulos、Wei Huang、Nese Kurt-Yilmaz、Celia A. Schiffer、Akbar Ali
DOI:10.1021/acs.jmedchem.7b00426
日期:2017.7.13
strategy is reported for improving the resistance profile of HCV NS3/4A protease inhibitors. Analogues of 5172-mcP1P3 were designed by incorporating diverse quinoxalines at the P2 position that predominantly interact with the invariant catalytic triad of the protease. Exploration of structure–activity relationships showed that inhibitors with small hydrophobic substituents at the 3-position of P2 quinoxaline
据报道,以底物包膜为指导的设计策略可改善HCV NS3 / 4A蛋白酶抑制剂的耐药性。5172-mcP1P3的类似物是通过在P2位置掺入各种喹喔啉而设计的,这些喹喔啉主要与蛋白酶的恒定催化三联体相互作用。对结构-活性关系的研究表明,在P2喹喔啉的3位上具有小的疏水取代基的抑制剂可保持更好的抗药性,这可能是由于与S2亚位点残基的相互作用减少了。相反,在该位置具有较大基团的抑制剂对Arg155,Ala156和Asp168处的突变高度敏感。令人兴奋的是,几种抑制剂在EC 50的作用下表现出非凡的效能对于主要的耐药HCV变异株,其值≤5nM。这些发现支持设计成与蛋白酶的进化受限区域相互作用的抑制剂,同时避免了与对底物识别不是必需的残基的相互作用,不太可能对药物耐药。