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A virus-encoded microRNA contributes to evade innate immune response during SARS-CoV-2 infection
Meetali Singh; Maxime Chazal; Piergiuseppe Quarato; Loan Bourdon; Christope Malabat; Thomas Vallet; Marco Vignuzzi; Sylvie van der Werf; Sylvie Behillil; Flora Donati; Nathalie Sauvonnet; Giulia Nigro; Maryline Bourgine; Nolwenn Jouvenet; Germano Cecere.
Afiliação
  • Meetali Singh; Institut Pasteur
  • Maxime Chazal; Institut Pasteur
  • Piergiuseppe Quarato; Institut Pasteur
  • Loan Bourdon; Institut Pasteur
  • Christope Malabat; Institut Pasteur
  • Thomas Vallet; Institut Pasteur
  • Marco Vignuzzi; Institut Pasteur
  • Sylvie van der Werf; Institut Pasteur
  • Sylvie Behillil; Institut Pasteur
  • Flora Donati; Institut Pasteur
  • Nathalie Sauvonnet; Institut Pasteur
  • Giulia Nigro; Institut Pasteur
  • Maryline Bourgine; Institut Pasteur
  • Nolwenn Jouvenet; Institut Pasteur
  • Germano Cecere; Institut Pasteur
Preprint em Inglês | bioRxiv | ID: ppbiorxiv-459577
ABSTRACT
SARS-CoV-2 infection results in impaired interferon response in severe COVID-19 patients. However, how SARS-CoV-2 interferes with host immune response is incompletely understood. Here, we sequenced small RNAs from SARS-CoV-2-infected human cells and identified a micro-RNA (miRNA) encoded in a recently evolved region of the viral genome. We show that the virus-encoded miRNA produces two miRNA isoforms in infected cells by the enzyme Dicer and they are loaded into Argonaute proteins. Moreover, the predominant miRNA isoform targets the 3UTR of interferon-stimulated genes and represses their expression in a miRNA-like fashion. Finally, the two viral miRNA isoforms were detected in nasopharyngeal swabs from COVID-19 patients. We propose that SARS-CoV-2 employs a virus-encoded miRNA to hijack the host miRNA machinery and evade the interferon-mediated immune response.
Licença
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Texto completo: Disponível Coleções: Preprints Base de dados: bioRxiv Idioma: Inglês Ano de publicação: 2021 Tipo de documento: Preprint
Texto completo: Disponível Coleções: Preprints Base de dados: bioRxiv Idioma: Inglês Ano de publicação: 2021 Tipo de documento: Preprint
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