在大肠炎期间,Xbp1控制肠道ILC2s的修复功能
Yanyan Cui1, Zixiao Zhao2, Jing Shen1
1Department of Gastroenterology, Qilu Hospital of Shandong University, Advanced Medical Research Institute, Shandong University, Jinan, China.
The Journal of experimental medicine
|October 30, 2025
概括
2组先天性淋巴细胞 (ILC2s) 对于性结肠炎 (UC) 组织修复至关重要. 它们的功能依赖于未折叠的蛋白质反应 (UPR),而受损的UPR会损害修复,这表明针对叶酸代谢的新疗法.
科学领域:
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
- 细胞生物学 细胞生物学
背景情况:
- 性结肠炎 (UC) 涉及炎症诱导的组织损伤和受损的修复.
- 2组先天性淋巴细胞 (ILC2s) 对于组织修复至关重要,但在UC中功能障碍.
- 细胞内膜网膜应激和蛋白质加工中断影响ILC2功能.
研究的目的:
- 为了研究未折叠蛋白质响应 (UPR) 在肠道ILC2功能在结肠炎期间的作用.
- 阐明UPR调节ILC2介导的组织修复的机制.
- 基于ILC2功能来探索UC的潜在治疗点.
主要方法:
- 在UC和实验性结肠炎模型中分析ILC2s.
- 在UPR中评估IRE1α-Xbp1通路.
- 研究细胞因子 (IL-25,IFN-γ) 对ILC2s的影响.
- 测量依赖叶酸的单碳 (1C) 代谢.
- 使用1C代谢产物进行治疗干预.
主要成果:
- 肠道ILC2s的前修复功能取决于IRE1α-Xbp1 UPR通路.
- 大肠炎通过改变IL-25和IFN-γ水平来破坏这种途径,从而损害ILC2的修复能力.
- 拼接Xbp1促进二叶酸减少酶的表达,驱动1C代谢.
- 氨酸5'-单酸,一种1C代谢物,在小鼠模型中改善了结肠炎.
结论:
- 肠道ILC2s中的UPR感知肠道环境,以调节组织修复.
- 损坏的UPR和随后的代谢功能障碍有助于UC的进展.
- 叶酸介导的1C代谢代表了UC的有前途的治疗标.
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