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A virus-specific monocyte inflammatory phenotype is induced by SARS-CoV2 at the immune-epithelial interface
Preprint
em En
| PREPRINT-BIORXIV
| ID: ppbiorxiv-462202
ABSTRACT
Infection by SARS-CoV2 provokes a potentially fatal pneumonia with multiorgan failure, and high systemic inflammation. To gain mechanistic insight and ferret out the root of this immune dysregulation, we modeled by in vitro co-culture the interactions between infected epithelial cells and immunocytes. A strong response was induced in monocytes and B cells, with a SARS-CoV2-specific inflammatory gene cluster distinct from that seen in influenza-A or Ebola virus-infected co-cultures, and which reproduced deviations reported in blood or lung myeloid cells from COVID-19 patients. A substantial fraction of the effect could be reproduced after individual transfection of several SARS-CoV2 proteins (Spike and some non-structural proteins), mediated by soluble factors, but not via transcriptional induction. This response was greatly muted in monocytes from healthy children, perhaps a clue to the age-dependency of COVID-19. These results suggest that the inflammatory malfunction in COVID-19 is rooted in the earliest perturbations that SARS-CoV2 induces in epithelia.
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Texto completo:
1
Coleções:
09-preprints
Base de dados:
PREPRINT-BIORXIV
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Preprint