时间依赖M的选择性 肺结核 LeuRS 抑制剂 甘菲博罗尔是由目标脆弱性驱动的
Mingqian Wang1, YongLe He1, Siobhan A Cohen1
1Center for Advanced Study of Drug Action, and Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, United States.
ACS chemical biology
|December 3, 2025
概括
甘菲博罗尔有效地向Mycobacterium结核病leucyl-tRNA-synthetase (mtLeuRS),显示出强大的抑制和长期的后抗生素作用,支持其用于结核病. 它还抑制大肠杆菌 LeuRS,但由于目标脆弱性差异,缺乏抗菌活性.
科学领域:
- 微生物学 微生物学
- 药物发现 药物发现 药物发现
- 生物化学 生物化学
背景情况:
- 甘菲博罗尔是一种针对结核病治疗的研究药物,向Mycobacterium结核病白-tRNA-合成酶 (mtLeuRS).
- 结核病仍然是一个重大的全球卫生挑战,需要新的治疗策略.
研究的目的:
- 调查甘菲博对M.结核病和大肠杆菌的作用机制和抗菌活性.
- 为了阐明mtLeuRS和大肠杆菌LeuRS (ecLeuRS) 对甘菲博的不同敏感性.
主要方法:
- 进行了酶抑制试验,以确定mtLeuRS和ecLeuRS的IC50值.
- 测量了M.结核病的抗生素后效应 (PAE).
- 在存在或缺少诺瓦林和突变ecLeuRS的情况下,对大肠杆菌进行了抗菌活性评估.
主要成果:
- 甘菲博洛是一种强效的,时间依赖的mtLeuRS抑制剂 (IC50 1 nM),对M.结核病有77小时的PAE.
- 甘菲博洛也强烈抑制ecLeuRS (IC50 2 nM),但没有显示对大肠杆菌的抗菌活性.
- 通过诺瓦林或影响甘菲博洛-AMP与ecLeuRS结合的突变恢复了对大肠杆菌的活性,这表明涉及编辑部位的机制.
结论:
- mtLeuRS是一种高度脆弱的药物标,这解释了甘菲博洛对M.结核病的有效性.
- 在大肠杆菌中缺乏抗菌活性是由于ecLeuRS是一个低易受伤害的目标,其中甘菲博-AMP复合物抑制了编辑部位而不影响氨基化.
- 了解目标脆弱性对于开发有效的抗菌剂至关重要.
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