饮食驱动的Akkermansia muciniphila的差异反应调节了病原体的敏感性
Mathis Wolter1,2, Erica T Grant1,2, Marie Boudaud1
1Department of Infection and Immunity, Luxembourg Institute of Health, Esch-sur-Alzette, Luxembourg.
bioRxiv : the preprint server for biology
|January 3, 2024
概括
食纤维影响肠道细菌和病原体防御. 降解粘素的细菌Akkermansia muciniphila可以在纤维不足时增加对Citrobacter rodentium感染的易感性,但在纤维充足时提供保护.
科学领域:
- 微生物学 微生物学
- 胃肠病学 胃肠病学
- 免疫学 免疫学 免疫学
背景情况:
- 缺乏食纤维可以侵蚀结肠粘液层,增加对诸如Citrobacter rodentium等肠道病原体的易感性.
- 粘菌细菌在调节宿主对这些病原体的敏感性方面的特定作用仍然在很大程度上是未知的.
研究的目的:
- 为了确定特定的细菌和它们的功能,有助于在缺乏纤维的肠道微生物群中对病原体的敏感性.
- 阐明粘菌细菌影响宿主-病原体相互作用的上下文依赖机制.
主要方法:
- 在 gnotobiotic 小鼠中利用了 14 个成员的人类合成微生物群.
- 采用粘菌细菌的菌株脱落,以评估它们对病原体易感性的影响.
- 分析了宿主免疫反应和病原体负载.
主要成果:
- Akkermansia muciniphila被确定为一个关键的细菌,在纤维剥夺期间增加宿主对Citrobacter rodentium的脆弱性.
- A. muciniphila 展示了取决于环境的效应,减少了纤维充足的饮食中的病原体负载.
- 增加的病原体易感性与增强的粘液透性和改变的细菌活动有关,而不是改变宿主免疫力.
结论:
- 粘菌细菌的功能反应,如A. muciniphila,对于确定肠道病原体易感性至关重要.
- 这些发现突出了特定肠道微生物在对病原体的宿主防御中的复杂,取决于环境的作用.
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