Effect of melatonin on myocardial oxidative stress induced by experimental obstructive jaundice

Objective: melatonin has been demonstrated to have active antioxidant properties in different tissues during experimental cholestasis. The aim of this research was to study myocardial oxidative stress on obstructive jaundice, and to analyze the effect of melatonin on myocardial oxidative lesions. Material and methods: we achieved cholestasis by ligature and sectioning of the main bile duct. Melatonin was administered intraperitoneally (500 µg/kg/day). We measured malondialdehyde (MDA), reduced glutathione (GSH), catalase (CAT), superoxide dismutase (SOD) and glutathione peroxydase (GPx) antioxidant enzyme levels in the heart tissue. Results: obstructive cholestasis increased MDA and decreased GSH as well as all antioxidant enzymes. Melatonin administration significantly decreased MDA values, and increased GSH and antioxidant enzymes on the icteric animal myocardium. Conclusions: melatonin treatment prevents oxidative stress in the cardiac tissue as induced by experimental cholestasis.

Detalhes bibliográficos

Principais autores:	Cruz,A., Tasset,I., Ramírez,L. M., Arjona,A., Segura,J., Túnez,I., Montilla,P., Muntané,J., Padillo,F. J.
Formato:	Digital revista
Idioma:	English
Publicado em:	Sociedad Española de Patología Digestiva 2009
Acesso em linha:	http://scielo.isciii.es/scielo.php?script=sci_arttext&pid=S1130-01082009000700002
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