油酸的可用性会影响胸细胞预编程和随后的外围T细胞分化reg
Liangyu Lin1, Mingyuan Hu1, Qing Li1
1CAS Key Laboratory of Tissue Microenvironment and Tumor, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China.
Nature immunology
|December 7, 2023
概括
胸膜上皮质产生的油酸 (OA) 对于T细胞发育至关重要. 缺乏OA通过改变胸细胞的表观遗传修饰来增强调控性T (Treg) 细胞分化.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 对于免疫反应来说,T细胞子集的分化至关重要.
- 在胸膜发育过程中决定T细胞子集偏好的特征尚未完全理解.
- 调节性T (Treg) 细胞在免疫平衡和预防自身免疫性方面发挥着至关重要的作用.
研究的目的:
- 为了研究油酸 (OA) 生产在胸膜T细胞分化中的作用.
- 阐明OA可用性影响T细胞命运的分子机制.
- 确定OA缺乏对免疫反应和自身免疫性疾病的影响.
主要方法:
- 产生的小鼠缺乏醇调节元素结合蛋白分裂激活蛋白1 (Scd1),这是OA生产的酶,在胸膜上皮细胞中.
- 分析了Scd1-缺乏小鼠的胸腺和外围T细胞分化.
- 利用表观遗传分析 (H3K79me2水平) 和分子分析来研究基因调节.
- 研究了T细胞受体激活时的-NFAT1-Foxp3信号通路.
主要成果:
- 胸膜上皮质中的Scd1缺乏导致原始CD4+T细胞在Treg细胞中增强分化.
- 缺少OA导致小胞细胞中Atp2a2位点的H3K79二甲基化增加.
- 这种表观遗传修饰在成熟的T细胞中持续存在,促进了Atp2a2的表达.
- ATP2A2增强了-NFAT1-Foxp3轴的活动,在激活时促进Treg细胞分化.
- 缺少scd1的小鼠表现出实验性自身免疫脑膜炎的减弱发展.
结论:
- 油酸的可用性对于预先编程胸细胞向Treg细胞分化至关重要.
- 由OA水平影响的Atp2a2位点上的表观遗传修饰是Treg细胞发育的关键媒介.
- 胸膜微环境的代谢状态,特别是OA的产生,塑造了外围免疫细胞的功能.
- 向OA代谢可以为自身免疫性疾病提供治疗策略.
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