Carbon monoxide blocks oxidative stress-induced hepatocyte apoptosis via inhibition of the p54 JNK isoform

Laura Conde de la Rosa*, Titia E. Vrenken, Rebekka A. Hannivoort, Manon Buist-Homan, Rick Havinga, Dirk-Jan Slebos, Henk F. Kauffman, Klaas Nico Faber, Peter L. A. Jansen, Han Moshage

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

40 Citations (Scopus)

Abstract

Most chronic liver diseases are accompanied by oxidative stress, which may induce apoptosis in hepatocytes and liver injury. Oxidative stress induces heme oxygenase-1 (HO-1) expression. This stress-responsive cytoprotective protein is responsible for heme degradation into carbon monoxide (CO), free iron, and biliverdin. CO is an important intracellular messenger; however, the exact mechanisms responsible for its cytoprotective effect are not yet elucidated. Thus, we investigated whether HO-1 and CO protect primary hepatocytes against oxidative-stress-induced apoptosis. In vivo, bile duct ligation was used as model of chronic liver disease. In vitro, primary hepatocytes were exposed to the superoxide anion donor menadione in a normal and in a CO- containing atmosphere. Apoptosis was determined by measuring caspase-9, -6, -3 activity and poly(ADP-ribose) polymerase cleavage, and necrosis was determined by Sytox green staining. The results showed that (1) HO-I is induced in chronic cholestatic liver disease, (2) superoxide anions time- and dose-dependently induce HO-1 activity, (3) HO-1 overexpression inhibits superoxide-anions-induced apoptosis, and (4) CO blocks superoxide-anions-induced JNK phosphorylation and caspase-9, -6, -3 activation and abolishes apoptosis but does not increase necrosis. We conclude that HO-I and CO protect primary hepatocytes against superoxide-anions-induced apoptosis partially via inhibition of JNK activity. CO could represent an important candidate for the treatment of liver diseases. (C) 2007 Elsevier Inc. All rights reserved.

Original languageEnglish
Pages (from-to)1323-1333
Number of pages11
JournalFree Radical Biology and Medicine
Volume44
Issue number7
DOIs
Publication statusPublished - 1-Apr-2008
Event56th Annual Meeting of the American-Association-for-the-Study-of-Liver-Diseases - , Canada
Duration: 11-Nov-200515-Nov-2005

Keywords

  • NASH
  • oxidative stress
  • caspase
  • apoptosis
  • necrosis
  • heme oxygenase-1
  • carbon monoxide
  • MAPK
  • INK
  • NITRIC-OXIDE SYNTHASE
  • REPERFUSION LUNG INJURY
  • PROTEIN-KINASE PATHWAY
  • ACID-INDUCED APOPTOSIS
  • HEME OXYGENASE-1
  • RAT HEPATOCYTES
  • LIVER-INJURY
  • SIGNAL-TRANSDUCTION
  • MAP KINASES
  • CELL-DEATH

Cite this