Targeting organophosphorus compounds poisoning by novel quinuclidine-3 oximes: development of butyrylcholinesterase-based bioscavengers
作者:Antonio Zandona、Maja Katalinić、Goran Šinko、Andreja Radman Kastelic、Ines Primožič、Zrinka Kovarik
DOI:10.1007/s00204-020-02811-5
日期:2020.9
active site serine of BChE directs the favorable positioning of the quinuclidinium ring and the bromophenyl moiety of Q8, which makes phosphonylated-serine easily accessible for the nucleophilic displacement by the oxime group of Q8. This result presents a novel scaffold for the development of new BChE-based bioscavengers. Furthermore, a cytotoxic effect was not observed for Q8, which also makes it promising
合成了具有烷基或苄基取代基的14种单肟基喹啉鎓类化合物的文库,并在体外表征为有机磷化合物(OP)中毒治疗的潜在解毒剂。我们评估了其对OP抑制的人乙酰胆碱酯酶(AChE)和丁酰胆碱酯酶(BChE)的可逆抑制和激活的潜力,并通过分子对接研究评估了它们之间的相互作用。如果喹喔啉鎓化合物包含与喹喔啉鎓部分相连的苄基,则VCh,环沙林,沙林和对氧磷抑制的AChE和BChE的重新活化均很明显。在所有14种化合物中,肟Q8 [4-溴苄基-3-(羟基亚氨基)奎宁环己溴铵]被选为具有最高确定的总重新活化率,约为20,000 M -1对于环沙蛋白抑制的BChE, min -1。此外,这种肟与BChE的结合表现出了作为环沙林的生物清除剂的能力,在2小时内降解了环沙林的浓度是酶的100倍以上。分子建模表明,与BChE的活性位点丝氨酸缀合的环己基部分的位置指示了喹啉环和Q8的溴苯基部分的有利位置,这使得磷酰化的丝氨