Protective effects of melatonin against carbon tetrachloride hepatotoxicity in rats

L. B. Zavodnik, Ilya B. Zavodnik, E. A. Lapshina, E. B. Belonovskaya, D. I. Martinchik, R. I. Kravchuk, M. Bryszewska, R. J. Reiter

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Melatonin is an indolamine, mainly secreted by the pineal gland into the blood of mammalian species. The potential for protective effects of melatonin on carbon tetrachloride (CCl4)-induced acute liver injury in rats was investigated in this work. CCl4 exerts its toxic effects by generation of free radicals; it was intragastrically administered to male Wistar rats (4 g kg-1 body weight) at 20 h before the animals were decapitated. Melatonin (15 mg kg-1 body weight) was administered intraperitoneally three times: 30 min before and at 2 and 4 h after CCl 4 injection. Rats injected with CCl4 alone showed significant lipid and hydropic dystrophy of the liver, massive necrosis of hepatocytes, marked increases in free and conjugated bilirubin levels, elevation of hepatic enzymes (alanine aminotransferase and aspartate aminotransferase) in plasma, as well as NO accumulation in liver and in blood. Melatonin administered at a pharmacological dose diminished the toxic effects of CCl 4. Thus it decreased both the structural and functional injury of hepatocytes and clearly exerted hepatoprotective effects. Melatonin administration also reduced CCl4-induced NO generation. These findings suggest that the effect of melatonin on CCl4-induced acute liver injury depends on the antioxidant action of melatonin.

Original languageEnglish (US)
Pages (from-to)353-359
Number of pages7
JournalCell Biochemistry and Function
Volume23
Issue number5
DOIs
StatePublished - Sep 1 2005

Keywords

  • Carbon tetrachloride
  • Lipid and hydropic dystrophy
  • Liver
  • Melatonin
  • Nitric oxide

ASJC Scopus subject areas

  • Biochemistry
  • Clinical Biochemistry
  • Cell Biology

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