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老化的调节性T细胞无法控制自身免疫性眼腺致病性CD4T细胞

Kaitlin K Scholand^1,2, Laura Schaefer³, Gowthaman Govindarajan¹

¹Department of Ophthalmology, Ocular Surface Center, Cullen Eye Institute, Baylor College of Medicine, Houston, TX, USA.

|March 7, 2025

概括

调节性T细胞 (Tregs) 可以控制CD25淘汰小鼠的炎症,这是Sjögren病的模型. 年轻的Tregs有效抑制了眼腺炎症,而老年Tregs在体内显示抑制能力降低.

科学领域:

免疫学免疫学免疫学
这是一种自身免疫力.
眼科医生眼科眼科

背景情况:

CD25淘汰赛 (CD25KO) 的小鼠在眼腺 (LGs) 中表现出严重的炎症和淋巴细胞透,作为Sjögren病的模型.
在这个模型中,调节性T细胞 (Tregs) 在控制CD4+T细胞的致病性方面的作用仍然不清楚.

研究的目的:

调查Tregs是否可以控制CD25KO CD4+ T细胞的体内致病性.
为了比较年轻人与老年Tregs在改善自身免疫性炎症方面的抑制能力.

主要方法:

来自B6和CD25KO小鼠的眼腺的RNA批量测序,以识别差异表达的基因.
眼洗分析量化炎症和免疫相关蛋白质.
与年轻或老年B6 Tregs携带的CD25KO CD4+ T细胞共同采用转移实验到RAG1淘汰小鼠中.

主要成果:

CD25KO小鼠在LG中表现出显著的基因表达变化,具有高的促炎细胞因子 (TNF,IFN-γ,CCL5) 和降低的生长因子 (IL-12p40,VEGF-A).
仅仅 CD25KO CD4+ T 细胞的转移就会加剧 LG 炎症.
与年轻B6Tregs同时转移显著降低了LG炎症,而老年B6Tregs显示抑制能力下降,导致LGs更加炎症.

结论:

CD25KO小鼠发展出类似于Sjögren病的自身免疫,其特征是LG炎症和淋巴细胞透.
年轻的Tregs在体内有效地抑制了这种自身免疫力,突出了它们的治疗潜力.
衰老会损害Treg抑制功能,这表明与年龄相关的自身免疫性疾病恶化的机制.

关键词:

衰老的衰老衰老的衰老这是一种自身免疫力.眼腺是什么眼腺是什么关于MHC II的介绍监管性T细胞监管性T细胞斯约格伦病是斯约格伦病的一种疾病.

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