A small-molecule inhibitor of the NLRP3 inflammasome for the treatment of inflammatory diseases

Nat Med. 2015 Mar;21(3):248-55. doi: 10.1038/nm.3806. Epub 2015 Feb 16.

Abstract

The NOD-like receptor (NLR) family, pyrin domain-containing protein 3 (NLRP3) inflammasome is a component of the inflammatory process, and its aberrant activation is pathogenic in inherited disorders such as cryopyrin-associated periodic syndrome (CAPS) and complex diseases such as multiple sclerosis, type 2 diabetes, Alzheimer's disease and atherosclerosis. We describe the development of MCC950, a potent, selective, small-molecule inhibitor of NLRP3. MCC950 blocked canonical and noncanonical NLRP3 activation at nanomolar concentrations. MCC950 specifically inhibited activation of NLRP3 but not the AIM2, NLRC4 or NLRP1 inflammasomes. MCC950 reduced interleukin-1β (IL-1β) production in vivo and attenuated the severity of experimental autoimmune encephalomyelitis (EAE), a disease model of multiple sclerosis. Furthermore, MCC950 treatment rescued neonatal lethality in a mouse model of CAPS and was active in ex vivo samples from individuals with Muckle-Wells syndrome. MCC950 is thus a potential therapeutic for NLRP3-associated syndromes, including autoinflammatory and autoimmune diseases, and a tool for further study of the NLRP3 inflammasome in human health and disease.

Publication types

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

MeSH terms

  • Animals
  • Carrier Proteins / antagonists & inhibitors*
  • Cryopyrin-Associated Periodic Syndromes / drug therapy*
  • Disease Models, Animal
  • Encephalomyelitis, Autoimmune, Experimental / drug therapy*
  • Heterocyclic Compounds, 4 or More Rings / pharmacology
  • Heterocyclic Compounds, 4 or More Rings / therapeutic use*
  • Humans
  • Inflammasomes / antagonists & inhibitors*
  • Inflammation
  • Interleukin-1beta / drug effects*
  • Mice
  • Multiple Sclerosis*
  • NLR Family, Pyrin Domain-Containing 3 Protein
  • Sulfones / pharmacology
  • Sulfones / therapeutic use*

Substances

  • Carrier Proteins
  • Heterocyclic Compounds, 4 or More Rings
  • IL1B protein, mouse
  • Inflammasomes
  • Interleukin-1beta
  • MCC-950
  • NLR Family, Pyrin Domain-Containing 3 Protein
  • NLRP3 protein, human
  • Nlrp3 protein, mouse
  • Sulfones