RORγt+APCs需要一个不同的cis-regulatory元素来指导对饮食抗原的耐受性
Jie Zhao1,2,3,4, Jiacheng Hao1,2,3,4, Jincheng Chen1,2,3,4
1Institute for Immunology, Tsinghua University, Beijing, China.
Nature communications
|February 21, 2026
概括
一个新发现的调节元件,OCR369,控制抗原呈现细胞 (APC) 中的RORγt表达,这对口服耐受性至关重要. 它的删除会损害Treg的发育,导致肠道炎症和增加过敏敏感性.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 胃肠病学 胃肠病学
背景情况:
- 口服耐受性对肠道免疫至关重要,防止对饮食和微生物抗原的炎症.
- 已知RORγt表达抗原呈现细胞 (APC) 通过诱导调节性T细胞 (Tregs) 来促进口服耐受性.
研究的目的:
- 确定控制RORγt表达的调控机制,特别是在RORγt+ APC中.
- 阐明这些调节元件在维持肠道平衡和口服耐受性方面的作用.
主要方法:
- 在Rorc基因位点内识别了一个cis调节元件 (OCR369).
- 分析OCR369与RUNX3的相互作用及其在染色素循环形成中的作用.
- 研究OCR369丧失对RORγt+ APCs,ILC3s,Tregs和小鼠肠道炎症的影响.
主要成果:
- 在小鼠中,OCR369的删除显著降低了RORγt+ APCs和ILC3s.
- 这种减少导致了饮食和微生物抗原特异性RORγt+ Tregs的减少.
- 删除OCR369导致了自发的小肠炎症,并增加了对过敏的敏感性.
结论:
- OCR369是RORγt表达在RORγt+APC中的关键调节者,与其他RORγt+细胞类型不同.
- 由OCR369调节的RORγt+ APCs对于口腔耐受性和肠道健康至关重要.
- 这种途径的失调会损害免疫耐受性,并促进炎症状况.
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