相关实验视频
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Isolation and Th17 Differentiation of Naïve CD4 T Lymphocytes
Published on: September 26, 2013
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胆酸代谢物控制TH17和Treg细胞的分化
Saiyu Hang1, Donggi Paik1, Lina Yao2
1Department of Immunology, Blavatnik Institute, Harvard Medical School, Boston, MA, USA.
Nature
|November 29, 2019
概括
胆汁酸代谢物调节适应性免疫. 在小鼠中发现,特定的石化酸衍生物抑制了T助手17 (TH17) 细胞分化,并促进了调节性T (Treg) 细胞分化.
科学领域:
- 免疫学
- 微生物学
- 代谢学
背景情况:
- 胆汁酸在哺乳动物的肠道中大量存在,并由细菌转化为生物活性分子.
- 虽然已知它们会影响新陈代谢,癌症和天生的免疫力,但它们对适应性免疫细胞如T辅助细胞17 (TH17) 和调节性T (Treg) 细胞的影响尚不清楚.
研究的目的:
- 研究胆汁酸代谢物对适应性免疫细胞,特别是TH17和Treg细胞的影响.
- 确定调节T细胞分化和功能的特定胆酸衍生物.
主要方法:
- 查胆汁酸代谢物的库.
- 评估已识别的代谢物对TH17和Treg细胞在体外和体内分化的影响.
- 研究分子作用机制,包括转录因子结合和反应性氧物种的产生.
主要成果:
- 鉴定出两种Lithocholic acid (LCA) 衍生物,即3- oxoLCA和isoalloLCA,是T细胞调节剂.
- 通过与RORγt结合,3- OxoLCA抑制了TH17细胞的分化.
- 通过线粒体ROS的产生促进了Treg细胞的分化,并且需要CNS3增强剂来发挥作用.
结论:
- 胆酸代谢物直接调节TH17和Treg细胞之间的平衡,影响宿主免疫反应.
- 特定的胆汁酸衍生物提供了通过向T细胞调节控制适应性免疫的潜在机制.
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