干白素21驱动超代谢状态和CD4+T细胞相关的致病性在慢性肠道炎症
Adebowale O Bamidele1, Shravan K Mishra2, Guilherme Piovezani Ramos3
1Immunometabolism and Mucosal Immunity Laboratory, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota; Department of Immunology, Mayo Clinic, Rochester, Minnesota.
Gastroenterology
|January 24, 2024
概括
干白素-21 (IL21) 损害了调节性T细胞 (Treg) 代谢,促进炎症性肠病中的炎症. 针对Tregs中的这种IL21诱导的代谢功能障碍,可以治疗慢性肠道炎症.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞的新陈代谢
- 胃肠病学 胃肠病学
背景情况:
- 失能调节性T细胞 (Tregs) 参与免疫媒介疾病,如炎症性肠病 (IBD).
- 在IBD中驱动炎症Treg发育和功能的机制尚不清楚.
- 细胞代谢在Treg功能和肠道平衡中的作用需要进一步研究.
研究的目的:
- 为了研究细胞代谢在调节性T细胞 (Tregs) 中的作用,与肠道平衡相关.
- 了解代谢途径如何影响Treg功能在炎症的背景下.
- 探索Treg介导的炎症性疾病的潜在治疗点.
主要方法:
- 利用人类Tregs进行线粒体超结构研究,生化分析,质细胞测量,代谢学和实时代谢分析.
- 采用电子显微镜,共聚焦成像,近距离结合试验,免疫阻塞和海马XF分析仪.
- 分析了克罗恩病单细胞RNA测序数据,并在小鼠结肠炎模型中测试了转基因Tregs.
主要成果:
- 在Tregs中线粒体-内质网膜的位置对pyruvate代谢至关重要;VDAC1抑制破坏了这一点.
- 介质素-21 (IL21) 减少了这些异位,导致超代谢状态和放大了Treg炎症反应.
- 由IL21诱导的代谢重新连接和炎症被甲基酸盐和糖原合成激酶3β抑制剂 (LY2090314) 逆转.
- 在Tregs中的IL21诱导的代谢基因在人类克罗恩氏病肠道Tregs中得到丰富.
- 与野生类型的Tregs相比,Il21r-/- Tregs在小鼠结肠炎中表现出更好的救援能力.
结论:
- 介素-21 (IL21) 诱导Tregs中的代谢功能障碍,加剧其炎症反应.
- 准IL21诱导的Treg代谢为慢性肠道炎症提供了一个潜在的治疗策略.
- 调节Treg代谢为治疗CD4+T细胞驱动的炎症状况提供了一个有希望的途径.
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