FDA-approved disulfiram inhibits pyroptosis by blocking gasdermin D pore formation

Nat Immunol. 2020 Jul;21(7):736-745. doi: 10.1038/s41590-020-0669-6. Epub 2020 May 4.

Abstract

Cytosolic sensing of pathogens and damage by myeloid and barrier epithelial cells assembles large complexes called inflammasomes, which activate inflammatory caspases to process cytokines (IL-1β) and gasdermin D (GSDMD). Cleaved GSDMD forms membrane pores, leading to cytokine release and inflammatory cell death (pyroptosis). Inhibiting GSDMD is an attractive strategy to curb inflammation. Here we identify disulfiram, a drug for treating alcohol addiction, as an inhibitor of pore formation by GSDMD but not other members of the GSDM family. Disulfiram blocks pyroptosis and cytokine release in cells and lipopolysaccharide-induced septic death in mice. At nanomolar concentration, disulfiram covalently modifies human/mouse Cys191/Cys192 in GSDMD to block pore formation. Disulfiram still allows IL-1β and GSDMD processing, but abrogates pore formation, thereby preventing IL-1β release and pyroptosis. The role of disulfiram in inhibiting GSDMD provides new therapeutic indications for repurposing this safe drug to counteract inflammation, which contributes to many human diseases.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Caspase 1 / genetics
  • Caspase 1 / metabolism
  • Caspase Inhibitors / pharmacology
  • Caspases / metabolism
  • Caspases, Initiator / genetics
  • Caspases, Initiator / metabolism
  • Cell Line, Tumor
  • Disulfiram / pharmacology*
  • Disulfiram / therapeutic use
  • Drug Evaluation, Preclinical
  • Drug Repositioning
  • Female
  • HEK293 Cells
  • High-Throughput Screening Assays
  • Humans
  • Interleukin-1beta / immunology
  • Interleukin-1beta / metabolism
  • Intracellular Signaling Peptides and Proteins / antagonists & inhibitors*
  • Intracellular Signaling Peptides and Proteins / genetics
  • Intracellular Signaling Peptides and Proteins / metabolism
  • Lipopolysaccharides / administration & dosage
  • Lipopolysaccharides / immunology
  • Liposomes
  • Mice
  • Mutagenesis, Site-Directed
  • Phosphate-Binding Proteins / antagonists & inhibitors*
  • Phosphate-Binding Proteins / genetics
  • Phosphate-Binding Proteins / metabolism
  • Pyroptosis / drug effects*
  • Pyroptosis / immunology
  • Recombinant Proteins / genetics
  • Recombinant Proteins / metabolism
  • Sepsis / drug therapy*
  • Sepsis / immunology
  • Sf9 Cells
  • Spodoptera

Substances

  • Caspase Inhibitors
  • GSDMD protein, human
  • Gsdmd protein, mouse
  • Interleukin-1beta
  • Intracellular Signaling Peptides and Proteins
  • Lipopolysaccharides
  • Liposomes
  • Phosphate-Binding Proteins
  • Recombinant Proteins
  • Casp4 protein, mouse
  • Caspases
  • Caspases, Initiator
  • caspase 11, human
  • Caspase 1
  • Disulfiram