Infections caused by multidrug-resistant (MDR) bacteria, particularly Gram-negative bacteria, are an escalating global health threat. Often clinicians are forced to administer the last-resort antibiotic colistin; however, colistin resistance is becoming increasingly prevalent, giving rise to the potential for a situation in which there are no treatment options for MDR Gram-negative infections. The development of adjuvants that circumvent bacterial resistance mechanisms is a promising orthogonal approach to the development of new antibiotics. We recently disclosed that the known IKK-β inhibitor IMD-0354 potently suppresses colistin resistance in several Gram-negative strains. In this study, we explore the structure-activity relationship (SAR) between the IMD-0354 scaffold and colistin resistance suppression, and identify several compounds with more potent activity than the parent against highly colistin-resistant strains of Acinetobacter baumannii and Klebsiella pneumoniae.

中文翻译：

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IMD-0354 的结构功能研究鉴定出高活性粘菌素佐剂。

由多重耐药（MDR）细菌，特别是革兰氏阴性菌引起的感染是一个不断升级的全球健康威胁。临床医生常常被迫使用最后手段抗生素粘菌素。然而，粘菌素耐药性正变得越来越普遍，导致可能出现多重耐药革兰氏阴性菌感染没有治疗选择的情况。开发规避细菌耐药机制的佐剂是开发新抗生素的一种有前途的正交方法。我们最近披露，已知的 IKK-β 抑制剂 IMD-0354 可有效抑制几种革兰氏阴性菌株的粘菌素耐药性。在这项研究中，我们探索了 IMD-0354 支架与粘菌素耐药性抑制之间的构效关系 (SAR)，并鉴定了几种比母体对鲍曼不动杆菌和肺炎克雷伯菌高度粘菌素耐药菌株具有更有效活性的化合物。