Discovery and Development of 8-Substituted Cycloberberine Derivatives as Novel Antibacterial Agents against MRSA
作者:Tianyun Fan、Xinxin Hu、Sheng Tang、Xiaojia Liu、Yanxiang Wang、Hongbin Deng、Xuefu You、Jiandong Jiang、Yinghong Li、Danqing Song
DOI:10.1021/acsmedchemlett.8b00094
日期:2018.5.10
activity profile against Gram-positive bacteria, especially methicillin-resistant S. aureus (MRSA) with minimum inhibitory concentration (MIC) values of 1–8 μg/mL, suggesting a possible novel mechanism of action against bacteria. Taking 2 as the lead, 23 new 8-substituted cycloberberine (CBBR) derivatives including ether, amine, and amide were synthesized and evaluated for their antibacterial effect. The
首先鉴定出具有独特骨架的8-乙酰氧基环小ber碱(2),以显示出对革兰氏阳性细菌,特别是耐甲氧西林金黄色葡萄球菌(MRSA)的有效活性谱,其最低抑菌浓度(MIC)值为1-8μg/ mL ,表明可能存在针对细菌的新型作用机制。以2为首,合成了23种新的8-取代的环小ber碱(CBBR)衍生物,包括醚,胺和酰胺,并对其抗菌效果进行了评估。结构-活性关系表明,在8位上引入合适的取代基可以大大增强抗MRSA的能力。其中,化合物5d和9e证明具有与铅2同样有效的抗MRSA效能,并具有更稳定的药代动力学特征。初步的机理研究表明,化合物9e部分通过催化细菌DNA的裂解而对细菌起作用。因此,我们认为8取代的CBBR衍生物构成了治疗MRSA感染的有希望的一类抗菌剂。