Oxidative stress in experimental liver microvesicular steatosis: Role of mitochondria and peroxisomes

Sathish Kumar Natarajan, Chundamannil E. Eapen, Anna B. Pullimood, Kunissery A. Balasubramanian

Research output: Contribution to journalArticle

50 Scopus citations

Abstract

Background: Hepatic microvesicular steatosis is a clinical manifestation seen in a number of liver diseases. Although the role of mitochondrial β-oxidation in the development of the disease has been well studied, information on lipid peroxidative damage in liver subcellular organelles is scarce. The present study looked at oxidative stress in hepatic peroxisomes and microsomes in microvesicular steatosis, using an animal model of the disease. Methods: Rats were given i.p. injections of sodium valproate (700 mg/kg bodyweight) to induce microvesicular steatosis, which was confirmed by histology. Results: Oxidative stress was evident in liver in steatosis, accompanied by structural and functional alterations in hepatic mitochondria. Alterations in lipid composition, with decreased phosphatidyl choline and ethanolamine and increased lysophosphatidyl choline and ethanolamine, were seen. An increase in triglyceride content was also seen. In addition, increased lipid peroxidation was also evident in peroxisomes and microsomes from steatotic rats. Pretreatment with clofibrate results in partial reversal of changes produced by valproate. Conclusions: These results suggest that in addition to impaired mitochondrial β-oxidation, oxidative stress is also seen in the hepatic peroxisomes and microsomes during microvesicular steatosis.

Original languageEnglish (US)
Pages (from-to)1240-1249
Number of pages10
JournalJournal of Gastroenterology and Hepatology (Australia)
Volume21
Issue number8
DOIs
StatePublished - Aug 2006

Keywords

  • Microvesicular steatosis
  • Mitochondria
  • Oxidative stress
  • Peroxisome proliferators activator receptor alpha (PPARα)
  • Valproate

ASJC Scopus subject areas

  • Hepatology
  • Gastroenterology

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