在流感感染期间,IKK2/NFkB信号传递控制了肺部 CD8+ T 细胞记忆
Curtis J Pritzl1,2, Dezzarae Luera1,2, Karin M Knudson1
1Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, Columbia, MO, USA.
Nature communications
|July 19, 2023
概括
在记忆形成后增强核因子kappa B (NFkB) 信号传递,提高了肺 CD8+ 组织居民记忆 (TRM) 细胞的生存率. 在免疫反应收缩期间操纵NFkB信号会损害TRM分化,突出其在TRM维护中的关键作用.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 传染性疾病 传染性疾病
背景情况:
- CD8+ T细胞组织居住记忆 (TRM) 细胞对粘膜免疫至关重要,但在肺部维持寿命短.
- 核因子卡帕B (NFkB) 信号传递对T细胞记忆至关重要,但其在TRM调制中的确切作用尚不清楚.
研究的目的:
- 研究NFkB信号如何以及何时影响免疫反应期间肺 CD8+ TRM细胞的维持和分化.
- 确定调节NFkB信号对TRM细胞存活,印记和转录特征的影响.
主要方法:
- 在流感感染模型的不同阶段,利用了T细胞中NFkB信号 (构成性活性IKK2或TNF) 的可诱导激活.
- 评估NFkB调制对亲生存分子 (Bcl-2,CD122),TRM印记分子 (CD69,CD103,Runx3,Eomes) 和TGFβ信号传递的影响.
- 评估了组织居民和循环记忆CD8+T细胞子集的生成和维护.
主要成果:
- 增强NFkB信号后记忆建立增加了Bcl-2和CD122水平,改善了肺CD8+TRM维护.
- 在收缩阶段激活NFkB通过干扰TGFβ信号传递和降低关键印记分子的调节,损害了CD8+ TRM分化.
- 在收缩阶段抑制NFkB信号传递改善了肺CD8+TRM生成和转录形状.
结论:
- NFkB信号传递是肺CD8+ TRM细胞生成和维护的关键,时间敏感的调节器.
- 在免疫反应期间在特定时间调节NFkB信号水平可能是增强CD8+ TRM细胞种群以改善粘膜免疫力的策略.
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