天生的2型淋巴细胞触发了膜巨细胞中的炎症开关
Stijn Verwaerde1, Jean-François Hastir2, Sjoerd T T Schetters1
1Laboratory of Immunoregulation and Mucosal Immunology, VIB-UGent Center for Inflammation Research, Ghent 9052, Belgium; Department of Internal Medicine and Pediatrics, Ghent University, Ghent 9000, Belgium.
Immunity
|December 12, 2025
概括
组织寄居的膜巨细胞 (trAMs) 通常调节免疫力,但在过敏反应期间可以变得有炎症作用. 从PPARγ切换到IRF4可以重新编程Trams,从而导致肺病理.
科学领域:
- 免疫学 免疫学 免疫学
- 肺部病理学 肺部病理学
- 细胞生物学 细胞生物学
背景情况:
- 组织寄居的膜巨细胞 (trAMs) 对于肺部恒温和免疫调节至关重要.
- 它们通常被认为比招募的巨细胞更能抵抗炎症重编程.
- 它们在2型免疫和过敏性肺部疾病中的作用尚未完全理解.
研究的目的:
- 研究trAMs在2型免疫和过敏性肺炎中的作用.
- 阐明在过敏原暴露期间的trAM重编程背后的分子机制.
- 了解Trams如何导致过敏原诱导的肺病理.
主要方法:
- 使用了一种新的小鼠模型来选择性地耗尽和替换trAMs.
- 分析过敏原挑战后肺部的细胞和分子变化.
- 研究了转录因子IRF4和PPARγ在trAM功能中的作用.
主要成果:
- 对过敏原的暴露诱导了与生俱来的2型淋巴细胞 (ILC2s) 产生的互白素-13的产生,重编程了trAMs.
- 这种重编程涉及诱导转录因子IRF4,抑制PPARγ和改变trAM身份.
- 重编程的trAMs促进了化学激素的产生,细胞融合和炎症细胞的招募,导致肺病理.
结论:
- 与之前的假设相反,在2型免疫期间,trAMs可以采用亲炎性表型.
- 从PPARγ到IRF4的关键切换将trAM重新配置为驱动过敏肺炎的效应细胞.
- 这些发现揭示了在过敏性肺病的背景下巨细胞可塑性的新机制.
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