一个协调的细胞网络调节对食物的耐受性
Anna Rudnitsky1, Hanna Oh1, Maya Margolin1
1Department of Systems Immunology, Weizmann Institute of Science, Rehovot, Israel.
Nature
|May 27, 2025
概括
新的研究表明,RORγt+细胞,而不是传统的树突细胞,诱导食物特异性调节T细胞 (pTreg). 这种途径保持了肠道耐受性,在感染期间允许临时的效应,而不会破坏长期的食品安全.
科学领域:
- 免疫学
- 胃肠病学
- 微生物学
背景情况:
- 宿主对饮食抗原和开始性微生物的耐受性对于营养吸收和肠道健康至关重要.
- 周围调节性T细胞是这种免疫耐受性的关键媒介.
- 传统的1型树突细胞 (cDC1s) 之前被认为可以启动饮食中的pTreg诱导.
研究的目的:
- 鉴定导致特定食品的pTreg细胞的特定抗原呈现细胞.
- 阐明pTreg细胞和cDC1s在平衡和感染期间调节饮食中的CD8αβT细胞反应中的作用.
- 了解控制口服耐受性的免疫电路及其在宿主挑战期间的调节.
主要方法:
- 研究了RORγt+抗原呈现细胞 (APC) 在诱导食物特异性pTreg细胞中的作用.
- 分析了pTreg细胞和cDC1s在调节CD8αβT细胞扩张中的相互作用.
- 检查了感染和食物中毒对这种调节回路的影响.
主要成果:
- 食品特异性pTreg细胞仅由RORγt+ APCs诱导,而不是cDC1s.
- 在恒常状态期间的pTreg细胞-cDC1相互作用抑制了特定于食物的CD8αβT细胞的扩张.
- 感染破坏了这种调节,使得具有效应器功能的CD8αβT细胞短暂扩张.
- 在病原体清除后,饮食中的CD8αβ T细胞不会扩展到食物抗原,从而保持耐受性.
结论:
- 一个涉及RORγt+APC和T细胞的独特循环介导了对饮食抗原的耐受性.
- 在感染期间,这种循环允许短暂的保护效应,而不会影响长期的口服耐受性.
- 了解这种途径对于维持肠道平衡和安全食用至关重要.
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