来自微生物的酸盐诱导了结肠调节性T细胞的分化
Yukihiro Furusawa1, Yuuki Obata2, Shinji Fukuda3
11] RIKEN Center for Integrative Medical Sciences (IMS-RCAI), Kanagawa 230-0045, Japan [2] The Institute of Medical Science, The University of Tokyo, Tokyo 108-8639, Japan [3].
Nature
|November 15, 2013
概括
像Clostridia这样的肠道微生物促进免疫耐受性. 微生物酸盐是一种发酵产物,诱导结肠调节T (Treg) 细胞,这对于抑制肠道炎症和维持免疫平衡至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 胃肠病学 胃肠病学
背景情况:
- 肠道共生微生物显著影响宿主的粘膜免疫系统.
- 调节性T (Treg) 细胞由Clostridia等微生物诱导,对于控制肠道炎症和过敏反应至关重要.
- 开始性微生物诱导结肠Treg细胞的精确分子机制在很大程度上是未知的.
研究的目的:
- 研究肠道微生物诱导结肠Treg细胞的分子机制.
- 为了确定参与结肠Treg细胞分化中的特定微生物代谢物.
- 探索已识别的代谢物在治疗肠道炎症中的治疗潜力.
主要方法:
- 对肠道光线内容进行基于NMR的比较代谢组分析.
- 在体外和体内实验评估Treg细胞分化.
- 在小鼠 (Rag1(-/-)) 中使用CD4(+) CD45RB(hi) T细胞诱导结肠炎模型.
- 在Foxp3位点对组织蛋白修饰 (乙化) 的分析.
主要成果:
- 短链脂肪酸 (SCFA) 的光度与结肠Treg细胞数量正相关.
- 丁酸盐,一个关键的SCFA,被确定为结肠Treg细胞分化的强有力的诱导因子,在体外和体内.
- 丁酸盐治疗在小鼠模型中改善了结肠炎的发展.
- 丁酸盐在Foxp3局部调节区域中增强了组素H3的乙化,这表明Treg细胞诱导的机制.
结论:
- 微生物衍生的丁酸盐是诱导结肠Treg细胞分化的一个关键因素.
- 丁酸盐在通过Treg细胞诱导维持肠道免疫稳定性方面发挥着重要作用.
- 这些发现为宿主微生物相互作用和炎症性肠道疾病的潜在治疗策略提供了新的见解.
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