Abstract
CD8+ T cell immunity to SARS-CoV-2 has been implicated in COVID-19 severity and virus control. Here, we identified nonsynonymous mutations in MHC-I-restricted CD8+ T cell epitopes after deep sequencing of 747 SARS-CoV-2 virus isolates. Mutant peptides exhibited diminished or abrogated MHC-I binding in a cell-free in vitro assay. Reduced MHC-I binding of mutant peptides was associated with decreased proliferation, IFN-γ production and cytotoxic activity of CD8+ T cells isolated from HLA-matched COVID-19 patients. Single cell RNA sequencing of ex vivo expanded, tetramer-sorted CD8+ T cells from COVID-19 patients further revealed qualitative differences in the transcriptional response to mutant peptides. Our findings highlight the capacity of SARS-CoV-2 to subvert CD8+ T cell surveillance through point mutations in MHC-I-restricted viral epitopes.
Original language | English |
---|---|
Article number | abg6461 |
Journal | Science immunology |
Volume | 6 |
Issue number | 57 |
DOIs | |
Publication status | Published - 25 Mar 2021 |
Keywords
- CD8-Positive T-Lymphocytes/immunology
- COVID-19/genetics
- Cell Proliferation
- Epitopes, T-Lymphocyte/genetics
- HLA-A Antigens/immunology
- High-Throughput Nucleotide Sequencing
- Humans
- Immunity, Cellular
- Interferon-gamma/immunology
- Mutation
- Peptides/genetics
- SARS-CoV-2/genetics