A novel dual NLRP1 and NLRP3 inflammasome inhibitor for the treatment of inflammatory diseases

Callum A.H. Docherty, Anuruddika J. Fernando, Sarah Rosli, Maggie Lam, Roland E. Dolle, Manuel A. Navia, Ronald Farquhar, Danny La France, Michelle D. Tate, Christopher K. Murphy, Adriano G. Rossi, Ashley Mansell

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3 Citations (Scopus)

Abstract

Objectives: Inflammasomes induce maturation of the inflammatory cytokines IL-1β and IL-18, whose activity is associated with the pathophysiology of a wide range of infectious and inflammatory diseases. As validated therapeutic targets for the treatment of acute and chronic inflammatory diseases, there has been intense interest in developing small-molecule inhibitors to target inflammasome activity and reduce disease-associated inflammatory burden. Methods: We examined the therapeutic potential of a novel small-molecule inhibitor, and associated derivatives, termed ADS032 to target and reduce inflammasome-mediated inflammation in vivo. In vitro, we characterised ADS032 function, target engagement and specificity. Results: We describe ADS032 as the first dual NLRP1 and NLRP3 inhibitor. ADS032 is a rapid, reversible and stable inflammasome inhibitor that directly binds both NLRP1 and NLRP3, reducing secretion and maturation of IL-1β in human-derived macrophages and bronchial epithelial cells in response to the activation of NLPR1 and NLRP3. ADS032 also reduced NLRP3-induced ASC speck formation, indicative of targeting inflammasome formation. In vivo, ADS032 reduced IL-1β and TNF-α levels in the serum of mice challenged i.p. with LPS and reduced pulmonary inflammation in an acute model of lung silicosis. Critically, ADS032 protected mice from lethal influenza A virus challenge, displayed increased survival and reduced pulmonary inflammation. Conclusion: ADS032 is the first described dual inflammasome inhibitor and a potential therapeutic to treat both NLRP1- and NLRP3-associated inflammatory diseases and also constitutes a novel tool that allows examination of the role of NLRP1 in human disease.

Original languageEnglish
Article numbere1455
Number of pages18
JournalClinical & Translational Immunology
Volume12
Issue number6
DOIs
Publication statusPublished - 22 Jun 2023

Keywords

  • drug targets
  • inflammasome
  • inflammation
  • NLRP1
  • NLRP3
  • pulmonary inflammation

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