TRIM28是三维染色体状态的重要调节者,是CD8+T细胞激活的基础
Kun Wei1, Ruifeng Li1,2, Xiaohong Zhao1
1Institute for Immunology, Tsinghua University, Beijing, 100084, China.
Nature communications
|January 17, 2025
概括
该研究显示,TRIM28蛋白通过调节3D基因组组织和基因转录,对CD8+T细胞激活至关重要. 它的缺失会损害T细胞的反应和自身隐性IL-2的产生.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 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:
- T细胞激活涉及显著的表观遗传修饰.
- 高阶染色体组织在CD8+T细胞激活中的确切作用仍然不完全理解.
研究的目的:
- 为了研究CD8+T细胞激活期间的三维基因组组织.
- 阐明TRIM28在调节活性CD8+T细胞中的染色质结构和基因转录中的作用.
主要方法:
- 在小鼠的CD8+T细胞激活过程中对3D基因组变化的分析.
- 研究Trim28删除对T细胞激活,IL-2产生和基因转录的影响.
- 染色体免疫沉 (ChIP) 来评估TRIM28,CTCF,RNA Pol II和凝聚素结合.
主要成果:
- CD8+ T细胞激活与3D基因组组织和基因转录的广泛变化有关.
- CD8+ T 细胞中的 Trim28 除会破坏自身分泌IL-2 的产生,并损害 T 细胞的激活 in vitro 和 in vivo.
- TRIM28与调节区域结合,在循环处与CTCF重叠,对于RNA Pol II和凝聚素结合至关重要,维持活跃的染色质结构.
结论:
- TRIM28在建立和维护活性CD8+T细胞中基因转录所需的染色质拓学方面发挥着关键作用.
- 对于有效的CD8+T细胞免疫反应来说,TRIM28依赖的染色质组织至关重要.
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