Blockade of receptor for advanced glycation end product (RAGE) attenuates ischemia and reperfusion injury to the liver in mice

Hepatology. 2004 Feb;39(2):422-32. doi: 10.1002/hep.20045.

Abstract

Hepatic ischemia/reperfusion (I/R) injury associated with liver transplantation and hepatic resection is characterized by hepatocellular damage and a deleterious inflammatory response. In this study, we examined whether receptor for advanced glycation end product (RAGE) activation is linked to mechanisms accentuating inflammation on I/R in a murine model of total hepatic ischemia. Animals treated with soluble RAGE (sRAGE), the extracellular ligand-binding domain of RAGE, displayed increased survival after total hepatic I/R compared with vehicle treatment. TUNEL assay and histologic analysis revealed that blockade of RAGE was highly protective against hepatocellular death and necrosis on I/R; in parallel, proliferating cell nuclear antigen was enhanced in livers of mice treated with sRAGE. Rapid activation of p38, p44/42, stress-activated protein kinase and c-Jun N-terminal kinase mitogen-activated protein kinases, signal transducer and activator of transcription-3, and nuclear translocation of activator protein-1 was evident at early times on I/R. In the remnants of sRAGE-treated livers, however, activation of each of these signaling and transcription factor pathways was strikingly decreased. sRAGE-treated remnants displayed enhanced activation of nuclear factor kappaB, in parallel with increased transcripts for the proregenerative cytokine, tumor necrosis factor-alpha. In conclusion, these data suggest that RAGE modulates hepatic I/R injury, at least in part by activation of key signaling pathways linked to proinflammatory and cell death-promoting responses. We propose that blockade of this pathway may represent a novel strategy to attenuate injury in hepatic I/R and to facilitate regeneration.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cell Death
  • Hepatitis / immunology
  • Hepatitis / metabolism*
  • Hepatitis / mortality
  • Homeostasis
  • Inflammation Mediators / metabolism
  • Ligands
  • Male
  • Mice
  • Mice, Inbred C57BL
  • NF-kappa B / metabolism
  • Peptide Fragments / pharmacology
  • Receptor for Advanced Glycation End Products
  • Receptors, Immunologic / antagonists & inhibitors*
  • Receptors, Immunologic / metabolism*
  • Reperfusion Injury / immunology
  • Reperfusion Injury / metabolism*
  • Reperfusion Injury / mortality
  • Signal Transduction / immunology
  • Survival Rate
  • Transcription Factor AP-1 / metabolism

Substances

  • Inflammation Mediators
  • Ligands
  • NF-kappa B
  • Peptide Fragments
  • Receptor for Advanced Glycation End Products
  • Receptors, Immunologic
  • Transcription Factor AP-1