苏辛酸通过分子开关促进FOXP3降解来驱动肠道炎症
Hai Wang1, Danqing Hu2, Yang Cheng1
1Department of Pathology, Center for Human Immunobiology and Robert H. Lurie Comprehensive Cancer Center, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
Nature immunology
|June 2, 2025
概括
增加的酸盐通过损害调节性T (Treg) 细胞促进炎症性肠病 (IBD). 苏酸减少FOXP3的表达,导致肠道炎症和IBD患者的免疫抑制降低.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢过程中的代谢.
- 胃肠病学 胃肠病学
背景情况:
- 在炎症性肠道疾病 (IBD) 中观察到高酸盐水平.
- 苏酸在IBD病原体中的确切作用尚未完全理解.
- 调节性T (Treg) 细胞对免疫平衡至关重要,在IBD中通常是功能失调的.
研究的目的:
- 为了调查酸盐在IBD病变发生过程中的作用.
- 阐明糖酸盐影响Treg细胞功能的分子机制.
- 根据酸盐代谢,确定IBD的潜在治疗点.
主要方法:
- 用大肠炎的小鼠模型来研究酸盐的影响.
- 在Treg细胞中分析了FOXP3,互白素-17和2-氧格酸脱酶复合体 (OGDHc) 的表达水平.
- 在Treg细胞中进行了OGDHc成分DLst的遗传删除.
- 研究了FOXP3化和蛋白质降解途径.
- 评估了Treg细胞功能和免疫抑制能力.
- 对IBD患者的Treg细胞进行了分析.
主要成果:
- 在小鼠中,酸盐通过降低FOXP3和增加Treg细胞中的互白素-17促进了大肠炎.
- 苏酸减少了OGDHc的表达,导致FOXP3苏化和随后的蛋白质降解的减少.
- 在Treg细胞中Dlst的遗传删除导致FOXP3的减少,Treg功能受损和严重的肠道炎症.
- 恢复FOXP3表达恢复了DLST缺乏Treg细胞的功能.
- IBD患者在Treg细胞中表现出降低的FOXP3和OGDHc水平,与酸盐水平和炎症严重程度负相关.
结论:
- 苏酸盐通过破坏Treg细胞的稳定性和功能,起到IBD的致病因子作用.
- 苏酸通过OGDHc依赖途径调节FOXP3的稳定性,在炎症过程中产生分子开关.
- 向糖酸盐-OGDHc-FOXP3轴可能为IBD提供一种新的治疗策略.
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