在口服耐受性中的食抗原的识别和表征
Jamie E Blum1,2,3, Ryan Kong1, E A Schulman2
1Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA.
Science immunology
|March 6, 2026
概括
饮食中的种子储存蛋白,如玉米α-zein,激活肠道调节T (Treg) 细胞. 这些自然存在的Treg细胞抑制免疫反应,有助于口服耐受性.
科学领域:
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
- 食品科学 食品科学 食品科学
背景情况:
- 肠道调节T (Treg) 细胞诱导对食物抗原的免疫耐受性.
- 触发这种耐受性的特定食物蛋白质在很大程度上是未知的.
- 种子储存蛋白代表了一个潜在的,但尚未被探索的口服耐受性抗原类.
研究的目的:
- 通过肠道Treg细胞识别引起免疫耐受性的食物抗原.
- 描述Treg细胞识别种子储存蛋白的发育,功能和免疫抑制特性.
主要方法:
- 主体组织相容性复合体 (MHC) 四聚体染色用于识别抗原特异性T细胞.
- 活体实验和体内实验,以评估Treg细胞的增殖和免疫抑制.
- 在断奶期间和对饮食暴露的反应中分析小鼠的Treg细胞种群.
主要成果:
- 来自种子储存蛋白质,特别是玉米α-zein的epitopes被小鼠肠道Treg细胞识别出来.
- 因特异性T细胞主要是Treg细胞,在断奶期间发育,包括高达2%的外围Treg细胞.
- 应对Zain的Treg细胞抑制了天真T细胞的增殖,并在饮食暴露后抑制了全身免疫反应.
结论:
- 食种子储存蛋白是一种新型抗原类,通过Treg细胞激活诱导口服耐受性.
- 识别这些蛋白质的肠内Treg细胞在抑制全身免疫反应方面发挥着至关重要的作用.
- 这项研究阐明了自然存在的Treg细胞的特征和功能,这些细胞参与了对种子储存蛋白的口服耐受性.
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