LuxR dependent quorum sensing inhibition by N,N′-disubstituted imidazolium salts
摘要:
Thirty N,N'-disubstituted imidazolium salts have been synthesized and evaluated as LuxR antagonists. Substitution on one of the imidazolium nitrogen atoms includes benzhydryl, fluorenyl or cyclopentyl substituent, and alkyl chains of various lengths on the second one. Most of these compounds displayed antagonist activity, with IC(50) reaching the micromolar range for the most active ones. The disubstituted imidazolium scaffold is thus shown to be a new pertinent pharmacophore in the field of AHL dependent QS inhibition. (C) 2011 Elsevier Ltd. All rights reserved.
合成了两个系列的氯化二苯甲基咪唑和三唑衍生物,并针对强致病菌的代表性菌株(金黄色葡萄球菌 CIP 4.83、伊氏埃希氏菌 CIP 5855、铜绿假单胞菌 CIP 82118、大肠杆菌CIP 和真菌 IP 53126)进行了体外测试白色念珠菌 IP 48.72、克柔念珠菌 IP 208.52、红色毛癣菌 IP 1657.86)。这些化合物中的大多数没有任何抗菌活性,但其中一些抑制红色毛癣菌的 MIC 值在 0.125 至 32 µg/mL 范围内,类似于或优于联苯苄唑和克霉唑,用作标准对照。在这些化合物中用三唑部分取代咪唑环导致抗真菌活性较低的衍生物。