Synthesis and biological evaluation of chepraecoxin A derivatives as α-glucosidase inhibitors
作者:Xiao-Tong Yang、Chang-An Geng、Tian-Ze Li、Zhen-Tao Deng、Ji-Jun Chen
DOI:10.1016/j.bmcl.2020.127020
日期:2020.4
acarbose (IC50 130.3 μM). Especially, compounds 17, 19 and 21 could inhibit α-glucosidase with IC50 values of 16.9 ± 3.4, 16.1 ± 1.2, and 17.1 ± 0.6 μM, 17-fold higher than CA. The most active compound 19 was proven to be a non-competitive inhibitor with a Ki value of 19.4 μM based on enzyme kinetics study. The primary SARs of CA derivatives were summarized for exploring antidiabetic candidates.
在我们先前的研究中获得的对-月桂烷二萜类化学毒素A(CA)显示出对α-葡萄糖苷酶的潜在抑制活性(IC50 274.5±12.5μM)。为了弄清结构-活性关系(SAR),通过修饰酯,烯丙基,双键和羧基合成了二十二种蛇蝎毒素A的衍生物,并测定了它们的α-葡萄糖苷酶抑制活性。其中,八种化合物(14-17、19-22)显着提高了活性,IC50值在16.1至71.4μM之间,甚至高于阳性对照阿卡波糖(IC50 130.3μM)。特别地,化合物17、19和21可以抑制α-葡萄糖苷酶,IC50值为16.9±3.4、16.1±1.2和17.1±0.6μM,比CA高17倍。活性最高的化合物19被证明是Ki值为19的非竞争性抑制剂。4μM基于酶动力学研究。总结了CA衍生物的主要SAR,以探索抗糖尿病候选药物。