Synthesis and Structure‐Activity Relationships of 3‐Arylisoquinolone Analogues as Highly Specific hCES2A Inhibitors
作者:Yitian Zhao、Yuan Xiong、Sanfeng Dong、Xiaoqing Guan、Yunqing Song、Yanqing Yang、Kun Zou、Zhao Li、Yong Zhang、Shengquan Fang、Bo Li、Weiliang Zhu、Kaixian Chen、Qi Jia、Guangbo Ge
DOI:10.1002/cmdc.202000581
日期:2021.1.19
with an IC50 value of 0.41 μΜ. Results of inhibition kinetics studies and molecular docking simulations demonstrate that both 3 h and 4 a can bind to multiple sites on hCES2A, functioning as mixed inhibitors. Structure−activity relationship analysis revealed that the lactam moiety on the B ring is crucial for specificity towards hCES2A, while a benzyloxy group is optimal for hCES2A inhibitory potency;
哺乳动物羧酸酯酶(CES)是参与各种内源性和外源性底物水解代谢的关键酶。人羧酸酯酶2A(hCES2A)主要分布在小肠和结肠中,在许多药物的水解中起重要作用。在这项研究中,3-芳基异喹诺酮3 h [3-(4-(苄氧基)-3-甲氧基苯基)-7,8-二甲氧基异喹啉-1(2 H )-one]和4 a [3-(4-(苄氧基) ‐3-甲氧基苯基)-4-溴-7,8-二甲氧基异喹啉-1(2 H )-one]被发现对 hCES2A 具有强效抑制作用 (IC 50 =0.68 μM, K i =0.36 μM) 和优异的特异性 (超过 hCES1 A 的 147.05 倍)。而且,图 4a显示出相对于3小时,对活HepG2细胞中的细胞内hCES2A的抑制提高了三倍,IC 50值为0.41μM。抑制动力学研究和分子对接模拟的结果表明,3 h和4 a都可以与 hCES2A 上的多个位点结合,起到混合抑制剂的作