Identification of Novel Coumestan Derivatives as Polyketide Synthase 13 Inhibitors against <i>Mycobacterium tuberculosis</i>. Part II
作者:Wei Zhang、Shichun Lun、Ling-Ling Liu、Shiqi Xiao、Guanfu Duan、Hendra Gunosewoyo、Fan Yang、Jie Tang、William R. Bishai、Li-Fang Yu
DOI:10.1021/acs.jmedchem.9b00010
日期:2019.4.11
identification of novel coumestan derivatives as Mycobacterium tuberculosis ( Mtb) Pks13-thioesterase (TE) domain inhibitors, with mutations observed (D1644G and N1640K) in the generated coumestan-resistant Mtb colonies. Herein, we report a further structure-activity relationships exploration exploiting the available Pks13-TE X-ray co-crystal structure that resulted in the discovery of extremely potent coumestan
我们的小组最近报道了鉴定出新的库米斯坦衍生物作为结核分枝杆菌(Mtb)Pks13-硫酯酶(TE)域抑制剂,并在产生的库米斯坦抗性Mtb菌落中观察到了突变(D1644G和N1640K)。本文中,我们报告了进一步的构效关系探索,利用了可用的Pks13-TE X射线共晶体结构,导致发现了非常有效的Coumestan类似物48和50。这些分子对两种药物均具有出色的抗结核活性-易感(MIC = 0.0039μg/ mL)和耐药Mtb菌株(MIC = 0.0078μg/ mL)。此外,出色的体外活性可转化为体内小鼠血清抑制滴定测定法,分别以100 mg / kg的剂量给予coumestan 48,其活性分别比以10或100 mg / kg的异烟肼或TAM16高8倍。Coumestans的初步ADME-Tox数据很有希望,并与合成的实用性相结合,可进一步评估Coumestan衍生物的体内功效。