STAT2 signaling restricts viral dissemination but drives severe pneumonia in SARS-CoV-2 infected hamsters

Nat Commun. 2020 Nov 17;11(1):5838. doi: 10.1038/s41467-020-19684-y.

Abstract

Emergence of SARS-CoV-2 causing COVID-19 has resulted in hundreds of thousands of deaths. In search for key targets of effective therapeutics, robust animal models mimicking COVID-19 in humans are urgently needed. Here, we show that Syrian hamsters, in contrast to mice, are highly permissive to SARS-CoV-2 and develop bronchopneumonia and strong inflammatory responses in the lungs with neutrophil infiltration and edema, further confirmed as consolidations visualized by micro-CT alike in clinical practice. Moreover, we identify an exuberant innate immune response as key player in pathogenesis, in which STAT2 signaling plays a dual role, driving severe lung injury on the one hand, yet restricting systemic virus dissemination on the other. Our results reveal the importance of STAT2-dependent interferon responses in the pathogenesis and virus control during SARS-CoV-2 infection and may help rationalizing new strategies for the treatment of COVID-19 patients.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Betacoronavirus / pathogenicity
  • Betacoronavirus / physiology*
  • COVID-19
  • Coronavirus Infections / immunology
  • Coronavirus Infections / metabolism
  • Coronavirus Infections / pathology*
  • Coronavirus Infections / virology*
  • Cricetinae
  • Disease Models, Animal*
  • Immunity, Innate
  • Interferon Type I / genetics
  • Interferon Type I / metabolism
  • Lung / pathology
  • Lung / virology
  • Mice
  • Pandemics
  • Pneumonia, Viral / immunology
  • Pneumonia, Viral / metabolism
  • Pneumonia, Viral / pathology*
  • Pneumonia, Viral / virology*
  • SARS-CoV-2
  • STAT2 Transcription Factor / genetics
  • STAT2 Transcription Factor / metabolism*
  • Signal Transduction*
  • Virus Replication

Substances

  • Interferon Type I
  • STAT2 Transcription Factor