生殖酵母促进沙门氏菌的毒性
Kanchan Jaswal1, Olivia A Todd1, Roberto C Flores Audelo1
1Department of Microbiology and Immunology, University of Illinois Chicago, Chicago, IL, USA.
Nature
|September 3, 2025
概括
常见的肠道真菌Candida albicans通过释放氨酸加剧细菌入侵并减轻炎症而使沙门氏菌感染恶化. 这项研究揭示了影响肠道病原体传播的关键跨王国相互作用.
科学领域:
- 微生物学
- 免疫学
- 胃肠病学
背景情况:
- 肠道病原体与宿主和微生物群相互作用以进行殖民.
- 肠道病原体和开始性细菌之间的相互作用已得到充分研究.
- 开始性真菌在肠道感染中的作用在很大程度上是未知的.
研究的目的:
- 调查Candida albicans (C. albicans) 对沙门氏菌 (Salmonella enterica) 血清 Typhimurium (沙门氏菌) 感染的影响
- 阐明C. albicans和沙门氏菌之间相互作用的机制.
主要方法:
- 有或没有C. albicans的沙门氏菌感染的小鼠模型.
- 对沙门氏菌结合和效应蛋白传递到C. albicans的分析.
- 代谢分析以确定参与相互作用的关键分子.
- 对炎症反应和细菌传播的评估.
主要成果:
- 在小鼠中增加了沙门氏菌的殖民化和系统传播.
- 沙门氏菌使用1型菌及其3型分泌系统与C. albicans相互作用.
- 沙门氏菌效应物SopB诱导C. albicans释放氨酸,增强沙门氏菌的入侵并抑制炎症.
- 在感染沙门氏菌的小鼠中,补充氨酸模仿了C. albicans的作用.
结论:
- C. albicans 殖民是传播沙门氏菌感染的易感因素.
- 氨酸是C. albicans,沙门氏菌和宿主之间交互的中心代谢物.
- 了解这些相互作用可以为肠道感染提供治疗策略.
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