SARS-CoV-2 nsp12 attenuates type I interferon production by inhibiting IRF3 nuclear translocation.
Cell Mol Immunol
; 18(4): 945-953, 2021 04.
Article
em En
| MEDLINE
| ID: mdl-33637958
ABSTRACT
SARS-CoV-2 is the pathogenic agent of COVID-19, which has evolved into a global pandemic. Compared with some other respiratory RNA viruses, SARS-CoV-2 is a poor inducer of type I interferon (IFN). Here, we report that SARS-CoV-2 nsp12, the viral RNA-dependent RNA polymerase (RdRp), suppresses host antiviral responses. SARS-CoV-2 nsp12 attenuated Sendai virus (SeV)- or poly(IC)-induced IFN-ß promoter activation in a dose-dependent manner. It also inhibited IFN promoter activation triggered by RIG-I, MDA5, MAVS, and IRF3 overexpression. Nsp12 did not impair IRF3 phosphorylation but suppressed the nuclear translocation of IRF3. Mutational analyses suggested that this suppression was not dependent on the polymerase activity of nsp12. Given these findings, our study reveals that SARS-CoV-2 RdRp can antagonize host antiviral innate immunity and thus provides insights into viral pathogenesis.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
Base de dados:
MEDLINE
Assunto principal:
Interferon Tipo I
/
Fator Regulador 3 de Interferon
/
RNA-Polimerase RNA-Dependente de Coronavírus
/
SARS-CoV-2
/
COVID-19
Limite:
Humans
Idioma:
En
Revista:
Cell Mol Immunol
Assunto da revista:
ALERGIA E IMUNOLOGIA
Ano de publicação:
2021
Tipo de documento:
Article