小分子MarR调节器通过诱导缩酶NfsA的激活来增强有氧大肠杆菌中metronidazole抗生素的活性
Thibault Caradec1, Coline Plé1, Giuseppe Sicoli2
1Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur Lille, U1019 - UMR 9017 - CIIL - Center for Infection and Immunity of Lille, Lille, France.
The Journal of biological chemistry
|June 2, 2024
概括
新型小分子通过准细菌转录调节器来提高抗生素的有效性. 这种方法增强了对大肠杆菌等耐药细菌的甲基醇 (MTZ) 的活性,为打击难以杀死的病原体提供了新的策略.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 抗生素耐药的肠道细菌对全球健康构成重大挑战.
- 开发新的策略来增强现有的抗生素对抗耐药细菌至关重要.
研究的目的:
- 为了证明概念证明,针对转录调节器的小分子可以增强甲化 (MTZ) 对大肠杆菌的抗生素活性.
- 为了确定这种增强的基础上的特定分子机制.
主要方法:
- 化学图书馆选,以确定MTZ增强分子.
- 转录组分析,功能遗传学和生物化学试验 (热转移,电泳运动转移试验).
- 电子偏磁共振 (EPR) 的测量.
主要成果:
- 确定了小分子,虽然具有低固有的活性,但显著提高了MTZ对大肠杆菌的疗效.
- 证明这些分子准了MarR转录抑制剂,对marRAB操作子和MarA规则子进行上调.
- 表明NfsA的上调对MTZ增强至关重要,NfsA催化MTZ减少到导致DNA损伤的基离子.
结论:
- 这项研究提供了使用转录调节器在肠杆菌中促进前药物的第一个例子.
- 针对MarR的小分子可以在有氧条件下通过上调NfsA.通过化学诱导metronidazole活动.
- 这一战略为开发针对抗生素耐药细菌的有效治疗提供了一个有希望的新途径.
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