缺氧通过改变染色质可访问性和基因表达来调节Th17/Treg平衡
Mariana Cázares-Olivera1, Shiyang Song2,3,4, Sofia Ylinen1
1Faculty of Biochemistry and Molecular Medicine, Biocenter Oulu, University of Oulu, Finland.
The FEBS journal
|December 24, 2025
概括
缺氧会改变T辅助细胞中的染色质可访问性,促进从调节性T细胞 (Tregs) 转移到T辅助17 (Th17) 细胞. 这一发现揭示了影响炎症疾病发展的新机制.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 缺氧在炎症中至关重要,影响T辅助体17 (Th17) 和调节性T细胞 (Treg) 平衡,导致炎症性疾病.
- 转录因子缺氧诱导因子1-α (HIF-1α) 促进Th17分化,但缺氧对Th17和Treg细胞染色质可访问性的影响尚不清楚.
研究的目的:
- 研究缺氧如何改变Th17和Treg细胞中的染色质可访问性.
- 为了将这些变化与影响Th17/Treg平衡的转录基因变化相关联.
主要方法:
- 使用测序 (ATAC-seq) 检测转化酶可访问的染色质,以评估染色质的可访问性.
- RNA测序 (RNA-seq) 用于分析基因表达特征.
- ATAC-seq和RNA-seq数据的综合分析.
主要成果:
- 缺氧显著改变了Treg细胞中的基因表达,超过Th17细胞,并增加了Hif1a表达.
- 在Tregs中增加的信号传感器和转录3 (STAT3) mRNA和蛋白质的激活剂表明一种新的缺氧-STAT3调节机制.
- 鉴定了转录因子 (ETS1,IRF1,RUNX2,ATF3) 作为潜在的调节器的T辅助细胞在低氧的分化.
- 缺氧增加了关键位置的染色质可访问性,有利于Th17细胞分化并改变Th17/Treg平衡.
结论:
- 缺氧通过改变染色质可访问性和转录因子基因表达来调节Th17/Treg平衡.
- 这项研究提供了关于缺氧如何影响Treg分化和促进炎症状况的见解.
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