Compound design guidelines for evading the efflux and permeation barriers of Escherichia coli with the oxazolidinone class of antibacterials: Test case for a general approach to improving whole cell Gram-negative activity
作者:Andrew Spaulding、Khuloud Takrouri、Pornachandran Mahalingam、Dillon C. Cleary、Harold D. Cooper、Paola Zucchi、Westley Tear、Bilyana Koleva、Penny J. Beuning、Elizabeth B. Hirsch、James B. Aggen
DOI:10.1016/j.bmcl.2017.10.018
日期:2017.12
Previously we reported the results from an effort to improve Gram-negative antibacterial activity in the oxazolidinone class of antibiotics via a systematic medicinal chemistry campaign focused entirely on C-ring modifications. In that series we set about testing if the efflux and permeation barriers intrinsic to the outer membrane of Escherichia coli could be rationally overcome by designing analogs
先前,我们报告了通过完全专注于C环修饰的系统性药物化学活动,努力提高恶唑烷酮类抗生素中革兰氏阴性抗菌活性的结果。在该系列文章中,我们着手测试是否可以通过设计类似物使其驻留在与革兰氏阴性活性相关的特定特性范围内来合理地克服大肠杆菌外膜固有的外排和渗透障碍:i)低分子量(<400), ii)高极性(clogD 7.4<1),和iii)pH 7.4时的两性离子特性。实际上,我们观察到只有存在于这些限制范围内的类似物才能克服这些障碍。本文中,我们报告了一项平行努力的结果,出于相同的目的,我们探索了支架中所有三个环的结构变化。针对大肠杆菌和金黄色葡萄球菌的诊断MIC板测试了化合物菌株以确定结合结构修饰在克服OM障碍和弥合物种之间的效力差距方面的影响。结果表明,将带电荷的部分分布在两个环上也有利于避免外膜屏障。重要的是,对由此和先前研究获得的结构-渗透关系(SPR)进行的分析表明,除分子量,极性和两性