The impact of viral mutations on recognition by SARS-CoV-2 specific T-cells

The impact of viral mutations on recognition by SARS-CoV-2 specific T-cells

We identify amino acid variants within dominant SARS-CoV-2 T cell epitopes by interrogating global sequence data. Several variants within nucleocapsid and ORF3a epitopes have arisen independently in multiple lineages and result in loss of recognition by epitope-specific T cells assessed by IFN-γ and...

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Hlavní autoři: de Silva, TI, Liu, G, Lindsey, BB, Dong, D, Moore, SC, Hsu, NS, Shah, D, Wellington, D, Mentzer, AJ, Angyal, A, Brown, R, Parker, MD, Ying, Z, Yao, X, Turtle, L, Dunachie, S, Maini, MK, Ogg, G, Knight, JC, Peng, Y, Rowland-Jones, SL, Dong, T
Médium: Journal article
Jazyk:English
Vydáno: Cell Press 2021
Popis
Shrnutí:We identify amino acid variants within dominant SARS-CoV-2 T cell epitopes by interrogating global sequence data. Several variants within nucleocapsid and ORF3a epitopes have arisen independently in multiple lineages and result in loss of recognition by epitope-specific T cells assessed by IFN-γ and cytotoxic killing assays. Complete loss of T cell responsiveness was seen due to Q213K in the A∗01:01-restricted CD8+ ORF3a epitope FTSDYYQLY207-215; due to P13L, P13S, and P13T in the B∗27:05-restricted CD8+ nucleocapsid epitope QRNAPRITF9-17; and due to T362I and P365S in the A∗03:01/A∗11:01-restricted CD8+ nucleocapsid epitope KTFPPTEPK361-369. CD8+ T cell lines unable to recognize variant epitopes have diverse T cell receptor repertoires. These data demonstrate the potential for T cell evasion and highlight the need for ongoing surveillance for variants capable of escaping T cell as well as humoral immunity.

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