皮肤真菌生物介导的对抗性对金黄色葡萄球菌通过修饰脂肪酸通过修饰的脂肪酸
Caitlin H Kowalski1, Uyen Thy Nguyen2, Susannah Lawhorn3
1Institute of Ecology and Evolution, University of Oregon, Eugene, OR 97403, USA.
Current biology : CB
|April 15, 2025
概括
皮肤真菌Malassezia sympodialis通过产生一种可以杀死细菌的化合物来抑制病原体金黄色葡萄球菌. 这种相互作用也推动了细菌的适应,可能会影响抗生素耐药性.
科学领域:
- 微生物学 微生物学
- 主体与微生物的相互作用
- 菌-细菌的相互作用
背景情况:
- 人体皮肤的真菌生物群,由马拉塞西亚酵母主导,在宿主健康中发挥作用,但其对病原体抑制的贡献尚不清楚.
- 与其他身体部位不同,皮肤菌群表现出了显著的稳定性.
- 马拉塞西亚物种是人类表皮的关键居民.
研究的目的:
- 研究人类皮肤真菌生物群,特别是马拉塞西亚交虫在抑制细菌病原体黄金菌球菌殖民中的作用.
- 阐明马拉塞西亚对抗黄金菌的机制.
- 了解细菌适应策略,以应对菌群诱导的压力.
主要方法:
- 在体外实验中评估M. sympodialis对S. aureus的抗菌活性.
- 鉴定由M. sympodialis生产的杀菌化合物.
- 试验S. aureus的进化,以确定适应性突变,以应对马氏菌的对抗性.
- 细菌调节通路的分析,包括严格反应调节器Rel和西格玛因子SigB.
主要成果:
- 马拉塞西亚 (Mlassezia sympodialis) 的殖民化显著减少了随后在人类皮肤上的金黄色葡萄球菌的殖民化.
- M. sympodialis产生一种基棕酸异构体,具有强大的杀菌活性,可对抗S. aureus.
- 在S. aureus中严格响应调节器Rel的突变赋予了对M. sympodialis的生存和皮肤上的竞争优势.
- 自然Rel变体和实验室进化的突变赋予了多药耐受性,依赖于西格玛因子SigB.
结论:
- 皮肤菌群,通过马拉塞西亚,可以通过产生抗微生物化合物来调解病原体殖民抵抗.
- 细菌适应真菌生物群的对抗性涉及严格的反应途径,导致新的生存机制.
- 微生物群驱动的进化可以影响病原体的抗生素敏感性,突出显示宿主微生物动态和抗菌素耐药性之间的联系.
关键词:
10-基棕酸是10-基棕酸中的一种.马拉塞西亚 (Malesezia) 是一个有趣的植物.黄金葡萄球菌黄金葡萄球菌抗生素耐受性 耐受性殖民化 抵抗 抵制这就是我的mycobiota.皮肤的微生物组严格的响应反应.更多相关视频
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