Discovery of potent 4-aminoquinoline hydrazone inhibitors of NRH:quinoneoxidoreductase-2 (NQO2)
作者:Buthaina Hussein、Balqis Ikhmais、Manikandan Kadirvel、Rachael N. Magwaza、Gavin Halbert、Richard A. Bryce、Ian J. Stratford、Sally Freeman
DOI:10.1016/j.ejmech.2019.111649
日期:2019.11
the production of ROS during quinone metabolism. Thus, there is a need to develop inhibitors of NQO2 that are active in vitro and in vivo. As part of a strategy to achieve this we have used the 4-aminoquinoline backbone as a starting point and synthesized 21 novel analogues. The syntheses utilised p-anisidine with Meldrum's acid and trimethyl orthoacetate or trimethyl orthobenzoate to give the 4-hydrazin-quinoline
(NRH):醌氧化还原酶2(NQO2)可能通过在醌代谢过程中产生ROS与癌症的发生和发展相关的各种过程有关。因此,需要开发在体外和体内均具有活性的NQO2抑制剂。作为实现这一目标的策略的一部分,我们以4-氨基喹啉骨架为起点,合成了21种新颖的类似物。合成使用对茴香胺与Meldrum的酸和原乙酸三甲酯或原苯甲酸三甲酯得到4-肼基-喹啉骨架,然后将其用醛或酰氯衍生化,分别得到或酰肼类似物。free是无细胞系统中最有效的NQO2抑制剂,有些具有较低的纳摩尔IC50值。结构活性分析强调了在4-氨基喹啉环的2-位上的小取代基对于减少空间位阻和改善支架在NQO2活性位点上的结合的重要性。使用卵巢癌SKOV-3和TOV-112细胞(分别表达高和低水平的NQO2)评估了体外的细胞毒性和NQO2抑制活性。通常,比酰肼类似物毒性更大,此外,毒性与细胞NQO2活性无关。使用CB1954的毒性作为替代终点,测量细