同抑制受体TIGIT促进T细胞中的组织保护功能
Camilla Panetti1, Rahel Daetwyler1, Anja Moncsek1
1Department of Quantitative Biomedicine, University of Zurich, Zurich, Switzerland.
Nature immunology
|October 15, 2025
概括
同抑制受体TIGIT限制了免疫病理,并促进病毒感染后的组织修复. TIGIT诱导调节性T细胞中的安菲雷古林的产生,促进再生.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 病毒学 病毒学
背景情况:
- 同抑制受体TIGIT (具有Ig和ITIM域的T细胞免疫受体) 在免疫调节中发挥作用.
- 虽然TIGIT抑制了抗瘤免疫力并限制了自身免疫病理,但它在病毒感染中的确切功能,特别是关于组织修复的功能,仍然不清楚.
- 以前的研究表明,TIGIT在病毒感染期间限制组织损伤,而不会影响病毒清除.
研究的目的:
- 阐明TIGIT影响免疫反应和病毒感染后组织修复的机制.
- 确定涉及TIGIT介导组织保护的特定T细胞子集和分子通路.
主要方法:
- 在病毒感染后的TIGIT阳性 (TIGIT+) T细胞中分析基因表达特征.
- 调查TIGIT在推动组织生长因子,特别是安菲瑞古林 (Areg) 产生中的作用.
- 使用淘汰模式来评估TIGIT和特定T细胞子集 (调控T细胞,CD8+T细胞) 在调节组织修复中的必要性.
主要成果:
- TIGIT+ T细胞表现出免疫调节和组织修复基因特征.
- 紧张直接诱导安菲瑞古林 (Areg) 表达,一个关键的组织生长因子,在没有紧张的情况下显著减少.
- 调节性T (Treg) 细胞,而不是CD8+ T细胞,被确定为调节TIGIT组织保护作用的关键子集.
- 在T细胞抗原受体刺激后,Treg细胞中TIGIT的参与激活了转录因子Blimp-1,从而提高了Areg的产生和随后的组织修复.
结论:
- 同抑制受体TIGIT除了免疫抑制之外具有非经典的功能.
- 在病毒感染后,TIGIT通过诱导调节性T细胞中的安菲瑞古林 (Areg) 生产,积极促进组织再生.
- 这一途径突显出一种新的免疫媒介组织修复机制,涉及TIGIT和Areg.
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