干扰素调节因子4与剂量相关,通过调节小鼠的染色质可访问性来控制外围Treg细胞分化和稳态
Leonie Caroline Voß1, Constantin Schmidt1,2, Aenne Harberts1,2,3
1Department for Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
Frontiers in immunology
|July 29, 2025
概括
干扰素调节因子4 (IRF4) 对于调节性T (Treg) 细胞分化和恒温至关重要. 失去IRF4会损害Treg细胞的成熟和功能,影响免疫耐受性.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
背景情况:
- 调节FoxP3+的T (Treg) 细胞对于通过抑制过度免疫反应来维持周围免疫耐受性至关重要.
- 转录因子干扰素调节因子4 (IRF4) 在T细胞的分化和功能中发挥作用,包括Treg细胞.
- 通过IRF4调节Treg细胞分化和功能的精确机制仍然不完全理解.
研究的目的:
- 研究IRF4在外围Treg细胞分化和维持中的作用.
- 阐明基底的分子机制 IRF4介导调节的Treg细胞功能和稳态.
主要方法:
- 利用IRF4缺乏的小鼠和T细胞转移模型,允许在外围T细胞中条件失活Irf4.
- 分析了Irf4操纵后的Treg细胞分化,平衡和细胞因子生产.
- 采用ATAC测序来评估Treg细胞中的染色质可访问性,这些细胞具有改变的Irf4水平.
主要成果:
- 即使失去一个Irf4等位基因也会损害效应Treg (eTreg) 细胞分化和降低Treg细胞平衡,这表明基因剂量依赖调节.
- 周围的Irf4失活导致Treg细胞的细胞因子产生改变,包括炎症和抑制细胞因子增加.
- ATAC测序揭示了对Treg细胞功能至关重要的基因的染色质可访问性发生变化,包括FoxP3位点和超级增强剂.
结论:
- IRF4对于外围Treg细胞的基因剂量依赖的分化和恒温是必不可少的.
- IRF4通过调节关键调节区域的染色质可访问性来影响Treg细胞功能,包括FoxP3促进体和CNS2.
- 这些发现凸显了IRF4作为Treg细胞生物学和外周免疫耐受性的关键调节者.
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