Identification of benzochromene derivatives as a highly specific NorA efflux pump inhibitor to mitigate the drug resistant strains of S. aureus
作者:Asaithampi Ganesan、Lowrence Rene Christena、Himesh Makala Venkata Subbarao、Ulaganathan Venkatasubramanian、Raman Thiagarajan、Venkatabalasubramanian Sivaramakrishnan、Kabilan Kasilingam、Nagarajan Saisubramanian、Subramaniapillai Selva Ganesan
DOI:10.1039/c6ra01981a
日期:——
Increased expression of efflux transport proteins confers the Multi Drug Resistant (MDR) phenotype to drug resistant bacteria, which can be mitigated by efflux pump inhibitors (EPI). EPI's have the dual advantage of restoring efficacy of antibiotics and retarding the evolution of drug resistant mutants. In this study, 17 heterocyclic derivatives synthesized by a polyethylenimine (PEI) catalyzed one-pot
外排转运蛋白表达的增加赋予耐药细菌多药耐药性(MDR)表型,可通过外排泵抑制剂(EPI)缓解。EPI具有恢复抗生素功效和延缓耐药突变体进化的双重优势。在这项研究中,评估了由聚乙烯亚胺(PEI)催化的一锅法合成的17种杂环衍生物的EPI潜力。基于计算机模拟研究和体外研究发现,基于5个苯并二烯(BC)的化合物(在17个杂环衍生物中)显着增强了环丙沙星(CPX)的作用,并且针对NorA过表达的突变体SA-1199B表现出32的最佳调节因子。使用斑马鱼模型进行的毒性分析表明,在所有评估的苯并色烯化合物中,BC9表现出低毒性。BC9在2μgml -1(4.03μM)的最低有效浓度(MEC)甚至在亚抑制浓度下均能抑制NorA外排泵,并且可有效逆转ATCC菌株和MRSA临床分离株的CPX MIC分别减少128倍和4倍。我们的结果表明,苯并色烯衍生物BC9是高度特异性的NorA抑制剂,可用于减轻金黄色葡萄球菌的MDR菌株