埃奎塞丁向膜完整性和转录网络,以对抗多药耐药的菌 (Enterococcus faecalis)
Xiao-Le Han1, Jiang Chen2, Tao Zhou1
1Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, School of Chemistry and Materials Science, South-Central Minzu University, Wuhan, 430074, PR China.
Microbial pathogenesis
|November 29, 2025
概括
埃奎塞是一种天然化合物,具有强大的抗菌活性,可以对抗多药耐药的菌 (MDR E. faecalis). 它破坏细菌膜并抑制生物膜的形成,为耐药性感染提供了一个有希望的新疗法.
科学领域:
- 微生物学 微生物学
- 自然产品 化学 化学
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 抗多种药物耐药的Enterococcus faecalis (MDR E. faecalis) 对公众健康构成重大威胁.
- 迫切需要新的治疗药物来对抗MDR细菌感染.
- 自然产品是发现新抗微生物化合物的有希望的来源.
研究的目的:
- 评估天然产品Equisetin对MDR E. faecalis. 的疗效.
- 为了阐明equisetin的作用机制.
- 为了评估Equisetin的安全概况.
主要方法:
- 使用MIC测定来评估抗菌活性.
- 通过膜完整性测试,泄漏研究,膜潜力脱极化,反应性氧物种 (ROS) 测量和ATP耗尽测试来研究作用机制.
- 评估了生物膜形成抑制和血液溶解活性.
- 进行了转录基因分析,以了解分子标.
主要成果:
- 埃奎西显示出对MDR E. faecalis的强烈抗菌活性,最小抑制度 (MIC) 为5.84μg/mL.
- 埃奎塞丁破坏了细菌膜的完整性,诱导了蛋白质和DNA泄漏,使膜潜力脱极化,提高了ROS水平,并耗尽了细胞内ATP.
- 埃奎塞丁抑制了生物膜的形成,并表现出极小的溶血活性,这表明它具有有利的安全性. 没有诱导阻力.
- 转录组分析揭示了一种多目标机制,具有DNA修复/压力基因的上调和代谢/蛋白质合成基因的下调.
结论:
- 乙素是一种强大的天然药物,有效对抗MDR E. faecalis.
- 乙素通过多种机制发挥其抗菌作用,包括膜破坏和干扰必要的细胞过程.
- 埃奎塞丁代表了治疗MDR E. faecalis.引起的感染的有前途的治疗候选者.
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