Alcohol-induced liver injury is modulated by Nlrp3 and Nlrc4 inflammasomes in mice

Mediators Inflamm. 2013:2013:751374. doi: 10.1155/2013/751374. Epub 2013 Dec 16.

Abstract

Alcoholic liver disease (ALD) is characterized by increased hepatic lipid accumulation (steatosis) and inflammation with increased expression of proinflammatory cytokines. Two of these cytokines, interleukin-1 β (IL-1 β ) and IL-18, require activation of caspase-1 via members of the NOD-like receptor (NLR) family. These NLRs form an inflammasome that is activated by pathogens and signals released through local tissue injury or death. NLR family pyrin domain containing 3 (Nlrp3) and NLR family CARD domain containing protein 4 (Nlrc4) have been studied minimally for their role in the development of ALD. Using mice with gene targeted deletions for Nlrp3 (Nlrp3(-/-)) and Nlrc4 (Nlrc4(-/-)), we analyzed the response to chronic alcohol consumption. We found that Nlrp3(-/-) mice have more severe liver injury with higher plasma alanine aminotransferase (ALT) levels, increased activation of IL-18, and reduced activation of IL-1B. In contrast, the Nlrc4(-/-) mice had similar alcohol-induced liver injury compared to C57BL/6J (B6) mice but had greatly reduced activation of IL-1 β . This suggests that Nlrp3 and Nlrc4 inflammasomes activate IL-1 β and IL-18 via caspase-1 in a differential manner. We conclude that the Nlrp3 inflammasome is protective during alcohol-induced liver injury.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Animals
  • Apoptosis Regulatory Proteins / physiology*
  • Calcium-Binding Proteins / physiology*
  • Carrier Proteins / physiology*
  • Chemokine CCL2 / physiology
  • Choline Deficiency / complications
  • Inflammasomes / physiology*
  • Interleukin-18 / physiology
  • Interleukin-1beta / physiology
  • Liver Diseases, Alcoholic / etiology*
  • Methionine / deficiency
  • Mice
  • Mice, Inbred C57BL
  • NLR Family, Pyrin Domain-Containing 3 Protein
  • STAT3 Transcription Factor / physiology
  • Tumor Necrosis Factor-alpha / physiology

Substances

  • Apoptosis Regulatory Proteins
  • Calcium-Binding Proteins
  • Carrier Proteins
  • Ccl2 protein, mouse
  • Chemokine CCL2
  • Inflammasomes
  • Interleukin-18
  • Interleukin-1beta
  • Ipaf protein, mouse
  • NLR Family, Pyrin Domain-Containing 3 Protein
  • Nlrp3 protein, mouse
  • STAT3 Transcription Factor
  • Stat3 protein, mouse
  • Tumor Necrosis Factor-alpha
  • Methionine