Allelic variation in class I HLA determines CD8(+) T cell repertoire shape and cross-reactive memory responses to SARS-CoV-2.

Allelic variation in class I HLA determines CD8(+) T cell repertoire shape and cross-reactive memory responses to SARS-CoV-2.
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DOI:
10.1126/sciimmunol.abk3070
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发表时间:
2022-01-21
期刊:
影响因子:
24.8
通讯作者:
--
中科院分区:
医学1区
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通过HLA I类分子将抗原有效呈递给CD 8 + T细胞是消除病毒和产生长期免疫记忆所必需的。在这项研究中,我们应用了单细胞,多组学技术,以产生一个统一的体外表征的CD 8 + T细胞对SARS-CoV-2跨越4个主要的HLA I类等位基因的反应。我们发现HLA基因型决定了表位特异性、TCR α/β序列多样性和对已有SARS-CoV-2反应性记忆T细胞库的利用等关键特征。单细胞转录组学揭示了SARS-CoV-2反应性T细胞的功能多样性T细胞表型,与疾病阶段和表位特异性相关。我们的研究结果表明,HLA变异显着影响CD 8 + T细胞库的形状和利用SARS-CoV-2感染后的免疫回忆。我们对CD 8 + T细胞对SARS-CoV-2的反应进行了统一的表征,揭示了由HLA基因型形成的预先存在的反应性。
Effective presentation of antigens by HLA class I molecules to CD8+ T cells is required for viral elimination and generation of long-term immunological memory. In this study, we applied a single-cell, multi-omic technology to generate a unified ex vivo characterization of the CD8+ T cell response to SARS-CoV-2 across 4 major HLA class I alleles. We found that HLA genotype conditions key features of epitope specificity, TCR α/β sequence diversity, and the utilization of pre-existing SARS-CoV-2 reactive memory T cell pools. Single-cell transcriptomics revealed functionally diverse T cell phenotypes of SARS-CoV-2-reactive T cells, associated with both disease stage and epitope specificity. Our results show that HLA variations significantly influence the CD8+ T cell repertoire shape and utilization of immune recall upon SARS-CoV-2 infection. We perform a unified characterization of CD8+ T cell responses to SARS-CoV-2, revealing pre-existing reactivity shaped by HLA genotype.
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