在小肠中,CAR指导T细胞适应胆汁酸
Mei Lan Chen1,2, Xiangsheng Huang3, Hongtao Wang3
1Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL, USA.
Nature
|April 8, 2021
概括
核受体CAR通过调节MDR1表达来保护小肠免疫细胞免受胆酸毒性. 这一发现为治疗克罗恩病和相关小肠炎症提供了新的策略.
科学领域:
- 免疫学
- 胃肠病学
- 分子生物学
背景情况:
- 在消化过程中必不可少的胆汁酸会引起小肠中毒和炎症.
- 虽然肝细胞控制胆汁酸平衡,但免疫细胞在小肠中的耐受机制尚不清楚.
- 小肠中的CD4+ T效应细胞调节MDR1以防止胆酸毒性并抑制炎症.
研究的目的:
- 确定小肠内T细胞MDR1表达的调节者.
- 研究核异生物受体CAR (构成性安德罗斯坦受体) 在T细胞对胆酸反应中的作用.
- 探索CAR作为小肠炎症的治疗目标的潜力.
主要方法:
- 研究了CAR在透小肠膜的T细胞中的作用.
- 在CAR激活时分析T细胞的转录变化.
- 用T细胞重建的Rag1-/-或Rag2-/-小鼠来评估CAR的体内功能.
- 研究了药理性CAR激活对胆汁酸诱导的胆汁炎的影响.
主要成果:
- 在小肠膜内重新编程T效应细胞,诱导排毒输送物和IL-10.
- 在T细胞中缺少CAR会加剧胆酸诱导的胆管炎.
- 药理性CAR激活抑制了小肠中的胆酸驱动的炎症.
- 在T细胞中局部作用,排毒胆汁酸并减少炎症.
结论:
- 核受体CAR是小肠T细胞中MDR1表达的关键调节者,可以防止胆酸毒性.
- 在T细胞中的CAR激活促进了解毒,并解决了炎症,为小肠克罗恩病提供了新的治疗策略.
- 这项研究强调了小肠内的淋巴细胞专业化,并确定了CAR作为潜在的治疗点.
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