IL-33 drives influenza-induced asthma exacerbations by halting innate and adaptive antiviral immunity

Research output: Contribution to journalArticle

Abstract

Background: Influenza virus triggers severe asthma exacerbations for which no adequate treatment is available. It is known that IL-33 levels correlate with exacerbation severity, but its role in the immunopathogenesis of exacerbations has remained elusive. Objective: We hypothesized that IL-33 is necessary to drive asthma exacerbations. We intervened with the IL-33 cascade and sought to dissect its role, also in synergy with thymic stromal lymphopoietin (TSLP), in airway inflammation, antiviral activity, and lung function. We aimed to unveil the major source of IL-33 in the airways and IL-33–dependent mechanisms that underlie severe asthma exacerbations. Methods: Patients with mild asthma were experimentally infected with rhinovirus. Mice were chronically exposed to house dust mite extract and then infected with influenza to resemble key features of exacerbations in human subjects. Interventions included the anti–IL-33 receptor ST2, anti–TSLP, or both. Results: We identified bronchial ciliated cells and type II alveolar cells as a major local source of IL-33 during virus-driven exacerbation in human subjects and mice, respectively. By blocking ST2, we demonstrated that IL-33 and not TSLP was necessary to drive exacerbations. IL-33 enhanced airway hyperresponsiveness and airway inflammation by suppressing innate and adaptive antiviral responses and by instructing epithelial cells and dendritic cells of house dust mite–sensitized mice to dampen IFN-β expression and prevent the TH1-promoting dendritic cell phenotype. IL-33 also boosted luminal NETosis and halted cytolytic antiviral activities but did not affect the TH2 response. Conclusion: Interventions targeting the IL-33/ST2 axis could prove an effective acute short-term therapy for virus-induced asthma exacerbations.

Details

Authors
  • Lara Ravanetti
  • Annemiek Dijkhuis
  • Tamara Dekker
  • Yanaika S. Sabogal Pineros
  • Abilash Ravi
  • Barbara S. Dierdorp
  • Jonas S. Erjefält
  • Michiko Mori
  • Stelios Pavlidis
  • Ian M. Adcock
  • Navin L. Rao
  • René Lutter
Organisations
External organisations
  • Academic Medical Center
  • Janssen Research & Development LLC
  • University of Amsterdam
  • Imperial College London
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Respiratory Medicine and Allergy

Keywords

  • airway hyperresponsiveness, airways epithelial cells, Asthma, dendritic cells, exacerbation, IL-33, immune response, influenza, NETosis
Original languageEnglish
Pages (from-to)1355-1370.e16
JournalJournal of Allergy and Clinical Immunology
Volume143
Issue number4
Early online date2018 Oct 12
Publication statusPublished - 2019
Publication categoryResearch
Peer-reviewedYes