规范的BAF复杂活动塑造了授权CD8T细胞效应器和记忆命运的增强器景观
Bryan McDonald1, Brent Y Chick2, Nasiha S Ahmed3
1NOMIS Center for Immunobiology and Microbial Pathogenesis, Salk Institute for Biological Studies, La Jolla, CA 92037, USA; Biomedical Sciences Graduate Program, University of California at San Diego, La Jolla, CA 92093, USA.
通过ARID1A,正规的BAF (cBAF) 综合体在CD8+ T细胞中重塑染色质,使得效应细胞和记忆细胞的分化. 它的缺失会损害增强器的可访问性,导致分化失败和减少抗病毒反应.
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:
- CD8+ T 细胞对于病原体防御至关重要,分化成效应和记忆子集.
- 染色体重塑在T细胞分化过程中调节基因表达.
- kanonical BAF (cBAF) 综合体在 CD8+ T 细胞分化中的作用尚不清楚.
研究的目的:
- 为了研究cBAF染色体重塑复合体在抗病毒CD8+T细胞中的功能.
- 确定cBAF子单元ARID1A在CD8+T细胞激活和分化中的作用.
主要方法:
- 在病毒感染期间研究了cBAF复合体在CD8+T细胞中的活性.
- 评估了Arid1a缺乏对染色质可访问性,转录因子结合和T细胞分化的影响.
- 利用分析染色体重塑,基因表达和细胞群的技术.
主要成果:
- 在CD8+T细胞激活后,ARID1A很早被招募,在增强剂上建立了开放的染色蛋白区域.
- 阿里德1a缺乏导致增强器开放受损,转录因子结合减少,以及不调节的增殖和基因表达.
- 在Arid1a缺少的CD8+T细胞中,终端效应因子分化被取消.
- 虽然循环记忆细胞的形成没有受到影响,但组织内存 (Trm) 细胞的形成明显受损.
结论:
- 通过ARID1A,cBAF复合体对于在激活的CD8+T细胞中建立增强剂景观至关重要.
- 通过cBAF介导的染色体重塑调节转录因子活性,对效应因子和记忆CD8+T细胞分化至关重要.
- 这项研究强调cBAF是T细胞介导免疫的关键调节者.
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