饮食中的蛋白质调节肠道树突细胞以建立粘膜平衡
Thais G Moreira1, Laura M Cox1, Patrick Da Silva1
1Ann Romney Center for Neurologic Diseases, Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
Mucosal immunology
|June 26, 2024
概括
饮食中的蛋白质对于肠道免疫耐受性至关重要. 没有蛋白质的饮食会损害调节性T细胞的产生,改变肠道树突细胞 (DC) 功能和肠道微生物组合.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物组研究的研究.
- 营养科学 营养科学
背景情况:
- 饮食中的蛋白质由肠道树突细胞 (DCs) 处理,以激活T细胞并诱导免疫反应.
- 氨基酸 (AA) 饮食缺乏这种能力,因为AA不能与T细胞激活的主要基因相容性复合体结合.
研究的目的:
- 调查全蛋白缺失对肠道DC功能,免疫耐受性和微生物组合的影响.
- 阐明饮食蛋白质在维持粘膜免疫平衡中的作用.
主要方法:
- 给小鼠食的是全蛋白饮食或氨基酸 (AA) 饮食.
- 进行了肠道DCs的转录分析.
- 分析了微生物组的组成.
- 进行了微生物组转移实验.
主要成果:
- 接受AA饮食的小鼠表现出调控性T细胞生成受损和耐受性丧失.
- 在肠道DC中观察到显著的转录变化,包括下调成熟,激活和免疫检查点基因.
- 这种AA饮食改变了肠道微生物组合,增加了Akkermansia muciniphilia和Oscillibacter,同时减少了Lactococcus lactis和Bifidobacterium.
- 虽然微生物转移影响了DC基因表达,但整个蛋白质的缺失是独特DC转录变化的主要驱动因素.
结论:
- 饮食中的蛋白质对于维持肠道DC功能和促进粘膜耐受性至关重要.
- 饮食中缺少全蛋白质会导致显著的免疫失调和微生物组变化.
- 这些发现强调了饮食蛋白质在肠道免疫力中的关键作用.
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