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Human NLRP1 is a sensor of pathogenic coronavirus 3CL proteases in lung epithelial cells

  • COVID Human Genetic Effort
  • Université Fédérale Toulouse Midi-Pyrénées
  • Invivogen Europe
  • Université de Montpellier
  • University of Cambridge
  • Agency for Science, Technology and Research, Singapore
  • Université Paris Cité
  • Rockefeller University
  • Nanyang Technological University
  • CHU de Toulouse
  • Université Paul Sabatier Toulouse III
  • Hôpital Purpan
  • Howard Hughes Medical Institute
  • Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore
  • Koc University

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Inflammation observed in SARS-CoV-2-infected patients suggests that inflammasomes, proinflammatory intracellular complexes, regulate various steps of infection. Lung epithelial cells express inflammasome-forming sensors and constitute the primary entry door of SARS-CoV-2. Here, we describe that the NLRP1 inflammasome detects SARS-CoV-2 infection in human lung epithelial cells. Specifically, human NLRP1 is cleaved at the Q333 site by multiple coronavirus 3CL proteases, which triggers inflammasome assembly and cell death and limits the production of infectious viral particles. Analysis of NLRP1-associated pathways unveils that 3CL proteases also inactivate the pyroptosis executioner Gasdermin D (GSDMD). Subsequently, caspase-3 and GSDME promote alternative cell pyroptosis. Finally, analysis of pyroptosis markers in plasma from COVID-19 patients with characterized severe pneumonia due to autoantibodies against, or inborn errors of, type I interferons (IFNs) highlights GSDME/caspase-3 as potential markers of disease severity. Overall, our findings identify NLRP1 as a sensor of SARS-CoV-2 infection in lung epithelia.
Original languageEnglish
Pages (from-to)2385-2400.e9
JournalMolecular cell
Volume82
Issue number13
DOIs
Publication statusPublished - 7 Jul 2022
Externally publishedYes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 3 - Good Health and Well-being
    SDG 3 Good Health and Well-being

Keywords

  • 3CL proteases
  • Gasdermins
  • NLRP1 inflammasome
  • SARS-CoV-2
  • epithelial cells
  • pyroptosis

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