T细胞受体序列影响T细胞记忆形成的可能性
Kaitlyn A Lagattuta1, Ayano C Kohlgruber2, Nouran S Abdelfattah3
1Center for Data Sciences, Brigham and Women's Hospital, Boston, MA, USA; Division of Genetics, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA; Department of Biomedical Informatics, Harvard Medical School, Boston, MA, USA; Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, MA, USA; Division of Rheumatology, Inflammation, and Immunity, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
T细胞受体 (TCR) 序列决定了T细胞的命运和记忆. 特定的TCR特征促进调节性T细胞分化,增强T细胞激活,导致免疫记忆.
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:
- T细胞受体 (TCR) 在个体的免疫系统中表现出序列多样性.
- 特定的TCR残留物影响粘膜关联不变T细胞 (MAIT) 和自然杀手T细胞 (NKT) 的分化.
研究的目的:
- 阐明TCR氨基酸序列对T细胞转录命运的影响.
- 识别控制T细胞分化和记忆形成的序列特征.
主要方法:
- 从961,531个单细胞中对联的αβTCR序列和转录组的分析.
- 利用TCR转导实验来验证发现.
- 开发了一个TCR评分函数",TCR-mem",以量化促进记忆的特征.
主要成果:
- 疏水性补充性决定区域 (CDR) 3残留物与CD4和CD8系中的调节性T细胞命运有关.
- 确定了特定的TCR序列特征,这些特征驱动了从天真T细胞到记忆T细胞的过渡.
- 证明,高的TCR-mem得分可以增强T细胞激活,无论抗原的特异性如何.
结论:
- TCR序列组成是T细胞命运和功能的关键决定因素.
- 特定的TCR序列特征促进T细胞激活和免疫记忆的建立.
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