人类T细胞受体谱的组织决定因素
Suhas Sureshchandra1, James Henderson2, Elizabeth Levendosky3
1Department of Physiology & Biophysics, Institute for Immunology, Center for Virus Research, Vaccine Research & Development Center, and Cancer Research Institute, University of California Irvine, Irvine, CA, USA.
bioRxiv : the preprint server for biology
|September 4, 2024
概括
大多数T细胞都存在于组织中,但研究通常使用血液. 这项研究分析了来自血液和桃体的数百万个T细胞,揭示了T细胞克隆及其基于位置的功能中的显著差异,强调了组织分析的必要性.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 基因组学就是基因组学.
背景情况:
- T 细胞 (T 淋巴细胞) 对于适应性免疫非常重要.
- 绝大多数 (98%) 的T细胞位于身体的各种组织中,而不是在周围血液中循环.
- 目前的T细胞分析主要依赖于外周血液样本,可能缺少关键的组织特异信息.
研究的目的:
- 通过比较来自血液和桃体的T细胞来研究T细胞受体 (TCR) 生物学.
- 了解组织和血液T细胞之间的克隆扩张,分布和表型差异.
- 改进对全身T细胞谱的估计,并评估解剖位置对T细胞特征的影响.
主要方法:
- 单细胞测序570万个T细胞,这些T细胞来自十位捐献者的自身血液和桃体.
- 分析T细胞受体 (TCR) 序列,以确定克隆扩张和共享.
- 在不同位置的抗原特异性CD8T细胞的表型和功能特征.
主要成果:
- 与血液相比,在桃体中确定了明显的克隆扩张和分布,在各位点之间具有较低的 (1-7%) 克隆共享.
- 在血液和桃体间的少数共享克隆中观察到不同的表型和功能.
- 证明了解剖位置是抗原特异性CD8 T细胞频率,表型和免疫主导性的主要决定因素.
结论:
- 组织内T细胞表现出独特的特征,与循环T细胞不同.
- 由于缺乏基于组织的分析,目前的曲目多样性估计可能被低估.
- 基于组织的T细胞分析对于准确的免疫谱的评估和治疗干预的监测至关重要.
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