在没有细菌的小鼠中,SFB鞭毛蛋白调节细胞粘附,内细胞和免疫调节
Huahai Chen1,2,3,4,5, Liu Wu6,7, Xiongyu Cao6,7
1Guangxi Academy of Marine Sciences, Guangxi Academy of Sciences, Nanning, Guangxi, China.
Frontiers in immunology
|September 5, 2025
概括
细分细菌 (SFB) 鞭增强了细菌的粘附和内化,促进了Th17免疫反应. 这项研究显示,
科学领域:
- 微生物学和免疫学
- 主体与微生物的相互作用
- 分子生物学
背景情况:
- 分段细菌 (SFB) 是宿主免疫系统发展的关键参与者.
- 了解SFB殖民机制对于免疫调节至关重要.
- 在这些过程中SFB鞭毛素的作用在很大程度上仍未被描述.
研究的目的:
- 研究SFB鞭毛蛋白在细菌粘附和内化中的作用.
- 确定SFB鞭毛蛋白对宿主免疫调节的影响,特别是Th17反应.
- 阐明SFB鞭毛蛋白与宿主细胞之间的分子相互作用.
主要方法:
- 工程 *乳球菌* 和 *大肠杆菌* 来表达SFB鞭毛蛋白基因.
- 使用肠上皮细胞进行"体外"共培养测定.
- 通过RNA测序和细胞因子分析进行无细菌小鼠殖民试验并分析宿主免疫反应.
- 使用分子对接来预测鞭毛蛋白与宿主蛋白的相互作用.
主要成果:
- SFB鞭毛素显著增强了细菌对肠道上皮细胞的附着性.
- 长时间的便持久性和细胞内化 (Lamp2 同位化).
- SFB 鞭毛素触发了 Th17 细胞分化通路,并增加了 Th17 相关的细胞因子 (IFN-γ,IL-23p19,IL-17A,IL-5,IL-6).
- 分子对接表明SFB鞭毛体和内细胞调节体 (内素A2,αM整体) 之间的高亲和相互作用.
结论:
- 通过增强的粘附和活跃的内部化,SFB鞭毛蛋白调解细菌-上皮相互作用.
- 在驱动Th17介导的免疫反应方面,SFB鞭毛素是关键因素.
- 这些发现提供了SFB殖民策略及其对宿主免疫力的洞察力.
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