Design, synthesis and biological evaluations of quaternization harman analogues as potential antibacterial agents
作者:Jiangkun Dai、Wenjia Dan、Siyu Ren、Congguo Shang、Junru Wang
DOI:10.1016/j.ejmech.2018.10.012
日期:2018.12
ciprofloxacin (6.9723). The results indicated that the quaternization harman analogues might exert their bactericidal effect by damaging bacterial cell membrane and wall, and disrupting the function of type II topoisomerase. In addition, the in vivo antibacterial assay with a protective efficacy of 81.3% further demonstrated the potential of these derivatives as new bactericides and antibiotics.
合成了33种新的季铵化哈曼类似物,并评估了它们对4种革兰氏阳性和2种革兰氏阴性细菌的抗菌活性。总结了结构与活性之间的关系,化合物4f,4i,4l,4u,4w,4x和5c表现出优异的抗菌活性,低细胞毒性,良好的热稳定性和“类药物”特性。特别是,化合物4x表现出更好的杀菌效果(对耐甲氧西林的金黄色葡萄球菌有4倍的优越性))比标准药物磷霉素钠和氨苄西林钠(最低抑菌浓度= 50 nmol / mL)高。扫描电子显微镜显示细菌细胞表面的形态变化,对接评估提供了4倍的良好总分(6.4952),接近环丙沙星的分值(6.9723)。结果表明,季铵化哈曼类似物可能通过破坏细菌细胞膜和壁,破坏II型拓扑异构酶的功能发挥杀菌作用。此外,体内抗菌试验的保护功效为81.3%,进一步证明了这些衍生物作为新型杀菌剂和抗生素的潜力。