曼诺基化甘氨酸通过重新编程承诺和谱系多样性来破坏正常的T细胞发育
Manuel M Vicente1,2,3, Inês Alves1, Ângela Fernandes1
1i3S - Institute for Research and Innovation in Health, University of Porto, Porto, Portugal.
Cellular & molecular immunology
|June 21, 2023
概括
改变的T细胞糖化,特别是高曼诺斯结构,破坏T细胞发育和调节性T细胞生成. 这导致对炎症和感染的易感性增加,凸显了N-甘氨酸在免疫健康中的关键作用.
科学领域:
- 免疫学 免疫学 免疫学
- 葡萄糖生物学 葡萄糖生物学
- 细胞生物学 细胞生物学
背景情况:
- 对于适应性免疫来说,T细胞发育至关重要,涉及T细胞受体 (TCR) 选择.
- 糖化,一个关键的翻译后修饰,影响蛋白质功能,包括TCRs.
- 除了TCR选择和疾病易感性之外,甘氨酸在T细胞发育中的确切作用仍然在很大程度上是未知的.
研究的目的:
- 为了研究T细胞发育过程中的特定阶段的糖体组成.
- 确定改变的N-糖化如何影响T细胞发育和免疫功能.
- 探索胸细胞糖化和易受炎症疾病之间的联系.
主要方法:
- 利用糖基工程小鼠 (Rag1CreMgat1fl/fl和Rag1CreMgat2fl/fl) 来操纵胸细胞中的N-糖基化简介.
- 分析了T细胞发育检查点,包括β选择,调控性T细胞生成和γδT细胞发育.
- 在小鼠中对结肠和炎和感染的评估易感性与改变的糖化.
主要成果:
- 在T细胞发育过程中发现了糖体组成的动态,阶段特定的变化.
- 限制N-葡萄糖酶化以高曼诺斯结构的胸细胞导致T细胞发育的重大缺陷.
- 发现单一的N-甘氨酸天线对于正常的T细胞发育至关重要,其缺失导致调节失调.
- 改变了糖化酶的小鼠表现出对炎症和感染的敏感性增加.
结论:
- 曼诺基化胸细胞导致T细胞发育失调.
- 改变的T细胞糖化直接与增加对炎症和感染的易感性有关.
- N-甘氨酸在维持T细胞平衡和预防疾病方面发挥着关键的,以前不被重视的作用.
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