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T细胞受体序列影响T细胞记忆形成的可能性
Kaitlyn A Lagattuta1,2,3,4,5, Aparna Nathan1,2,3,4,5, Laurie Rumker1,2,3,4,5
1Center for Data Sciences, Brigham and Women's Hospital, Boston, MA, USA.
bioRxiv : the preprint server for biology
|July 28, 2023
概括
T细胞受体 (TCR) 氨基酸序列显著影响T细胞分化和命运. CDR2α和CDR3中的特定TCR序列促进T细胞选择,成熟和免疫记忆的形成.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 基因组学就是基因组学.
背景情况:
- 对于适应性免疫来说,T细胞分化至关重要.
- T细胞受体 (TCR) 序列的可变性决定了T细胞的命运.
- 已知特定的TCR序列会影响自然杀手T (NKT) 和粘膜相关的不变T (MAIT) 细胞分化.
研究的目的:
- 为了全面定义T细胞受体 (TCR) 氨基酸序列对所有T细胞命运的影响.
- 为了研究TCR序列和T细胞转录组之间的关系.
- 确定影响T细胞发育和功能的特定TCR序列特征.
主要方法:
- 对配对的α-β TCR 序列和单细胞转录组的分析.
- 使用了一个由819772个单细胞组成的数据集.
- 生物信息分析以将TCR序列特征与细胞转录状态和发育结果相关联.
主要成果:
- 在TCR CDR3序列中的疏水性残留物在CD4+和CD8+T细胞中促进调节性T细胞转录状态.
- 特定的TCR序列特征,特别是在CDR2α中,增强了胸腺中的阳性选择.
- 这些TCR序列特征还促进了从天真T细胞到外围的记忆T细胞的过渡,即使T细胞也能识别相同的抗原.
结论:
- TCR氨基酸序列是T细胞命运和功能的关键决定因素,超出已知的MAIT和NKT细胞通路.
- 特定的TCR序列基因,特别是在CDR2α和CDR3中,在胸膜选择和外围记忆形成中起着重要的作用.
- 了解这些TCR序列-T细胞命运关系对于破译免疫记忆形成和优化对病原体的免疫反应至关重要.
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