在肠道平衡中,先天性淋巴细胞产生的可溶性LTα3的非冗余功能
Andrey A Kruglov1, Sergei I Grivennikov, Dmitry V Kuprash
1German Rheumatism Research Center (DRFZ), a Leibniz Institute, Berlin 10117, Germany.
概括
固有的淋巴细胞 (ILC) 使用不同的淋巴毒素形式来调节免疫球蛋白A (IgA) 生产和肠道微生物群. 溶性淋巴毒素控制T细胞归向,而膜结合的淋巴毒素影响树突细胞,影响适应性免疫力.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 细胞生物学 细胞生物学
背景情况:
- 粘膜免疫球蛋白A (IgA) 对于宿主防御和维持肠道微生物群平衡至关重要.
- 控制粘膜表面IgA诱导的精确机制尚不完全理解.
研究的目的:
- 阐明可溶性和膜结合性淋巴毒素由RORγt(+) 内生淋巴细胞 (ILCs) 生产的在调节肠道IgA生产中的不同作用.
- 研究这些淋巴毒素形式如何影响T细胞依赖和T细胞独立的IgA诱导通路.
主要方法:
- 利用遗传除模型从RORγt(+) 细胞中去除淋巴毒素α (LTα).
- 分析了IgA生产的变化,T细胞归宿,树突细胞功能和肠道微生物群组成.
主要成果:
- 来自RORγt的可溶性淋巴毒素α (sLTα3) (((+) ILCs通过调节T细胞肠道定位来促进T细胞依赖IgA的诱导.
- 来自RORγt的膜结合性淋巴毒素β (LTα1β2) ILCs通过树突细胞调节驱动T细胞独立的IgA诱导.
- 在RORγt(+) 细胞中完全消去LTα,废除了肠道IgA的产生,并改变了肠道微生物群.
结论:
- RORγt(+) ILCs使用不同的淋巴毒素异型 (溶解与膜结合) 来协调肠道中单独的适应性免疫反应.
- 这些独特的通路对于调节IgA的产生和维持开始性肠道微生物群的组成至关重要.
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