基因组 lysine 甲基转移酶 MLL1 调节调节性T细胞的激活和功能专业化
Ting Wang1, Jie Guo2, Liping Li1
1CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Science (CAS), Beijing 100101, China; Department of Savaid Medical School, University of the Chinese Academy of Sciences, Beijing 100049, China.
氨基甲基转移酶MLL1对于调节性T细胞 (Treg) 功能至关重要. 缺乏MLL1会损害Treg的激活和专业化,导致小鼠自身免疫性疾病.
科学领域:
- 免疫学 免疫学 免疫学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
背景情况:
- 调节性T细胞 (Tregs) 对免疫自我耐受性至关重要.
- 基因组修饰在Treg激活和专业化中的作用尚不清楚.
研究的目的:
- 在Treg规范中调查氨基甲基转移酶MLL1的功能.
- 阐明MLL1对Treg激活,专业化和免疫平衡的影响.
主要方法:
- 在小鼠中,特异于T细胞的MLL1删除.
- 用RNA测序来分析MLL1缺乏Tregs中的基因表达.
- 基斯修饰分析 (H3K4三甲基化).
- T-bet命运映射用于研究Th1型Tregs.
主要成果:
- 特定于T细胞的MLL1缺失导致老年小鼠的淋巴细胞自发增殖和自身免疫性疾病.
- 对Treg特异性MLL1的切除导致Treg功能障碍和全身自身免疫性疾病.
- 缺少MLL1影响了Treg激活,专业化和组织定位至关重要的基因的诱导.
- 在失调基因的转录开始部位观察到H3K4三甲基化缺陷.
- 发现MLL1对于稳定的Th1型Tregs的发展是必要的.
结论:
- MLL1在维持Treg功能和免疫自我耐受性方面发挥着至关重要的作用.
- MLL1通过涉及H3K4三甲基化的表观遗传机制调节Treg激活和专业化.
- MLL1对于建立稳定的Th1型Tregs和预防自身免疫性疾病至关重要.
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