Transcriptomics

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Identification and characterization of a SARS-CoV-2 specific CD8 T cell response with immunodominant features


ABSTRACT: The COVID-19 pandemic caused by SARS-CoV-2 is a continuous challenge worldwide, and there is an urgent need to map the landscape of immunogenic and immunodominant epitopes recognized by CD8 T cells. Here, we analyze samples from 31 COVID-19 patients for CD8 T cell recognition of 500 peptide-HLA class I complexes, restricted by 10 common HLA alleles. We identify 18 CD8 T cell recognized SARS-CoV-2 epitopes, including an epitope with immunodominant features derived from ORF1ab and restricted by HLA-A*01:01. In-depth characterization of SARS-CoV-2-specific CD8 T cell responses of patients with acute critical and severe disease reveals high expression of NKG2A, lack of cytokine production and a gene expression profile inhibiting T cell re-activation and migration while sustaining survival. SARS-CoV-2-specific CD8 T cell responses are detectable up to 5 months post recovery from critical and severe disease, and these responses convert from dysfunctional effector to functional memory CD8 T cells during convalescence.

ORGANISM(S): Homo sapiens

PROVIDER: GSE169503 | GEO | 2021/03/25

REPOSITORIES: GEO

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