Demonstration of In Vitro Resurrection of Aged Acetylcholinesterase after Exposure to Organophosphorus Chemical Nerve Agents
作者:Qinggeng Zhuang、Andrew J. Franjesevic、Thomas S. Corrigan、William H. Coldren、Rachel Dicken、Sydney Sillart、Ashley DeYong、Nathan Yoshino、Justin Smith、Stephanie Fabry、Keegan Fitzpatrick、Travis G. Blanton、Jojo Joseph、Ryan J. Yoder、Craig A. McElroy、Özlem Doğan Ekici、Christopher S. Callam、Christopher M. Hadad
DOI:10.1021/acs.jmedchem.7b01620
日期:2018.8.23
reactivators of OP-inhibited AChE are no longer effective. Realkylation of aged AChE may provide a route to reversing aging. We designed and synthesized a library of quinone methide precursors (QMPs) as proposed realkylators of aged AChE. Our lead compound (C8) from an in vitro screen successfully resurrected 32.7 and 20.4% of the activity of methylphosphonate-aged and isopropyl phosphate-aged electric-eel AChE
在有机磷(OP)神经毒剂抑制乙酰胆碱酯酶(AChE)之后,磷酸化丝氨酸的脱烷基反应会发生,称为老化。老化后,OP抑制的AChE的已知激活剂将不再有效。老化的AChE的重烷基化可能提供逆转老化的途径。我们设计和合成了醌甲基化物前体(QMP)库,作为老化的AChE的拟烷基化剂。4天后,我们通过体外筛选得到的先导化合物(C8)分别成功恢复了甲基膦酸酯老化和磷酸异丙酯老化电鳗AChE活性的32.7和20.4%。C8显示复活(从老化状态恢复到原始状态)和重新激活(从抑制状态恢复到原始状态)的属性。C8可以使甲基膦酸酯老化的AChE的复活显着依赖于pH,仅在1天后在4 mM和pH 9时恢复了21%的活性。C8对磷酸异丙酯老化的人AChE也有效。