Counteraction of adriamycin-induced oxidative damage in rat heart by selenium dietary supplementation.
Many reports indicate that dietary selenium, potentially increasing the activity of glutathione peroxidase, could offer protection against free-radical-induced damage. The effects of diets moderately enriched in selenium, as sodium selenite or as a lyophilized selenium-rich food, were studied in rats. Adriamycin, an anticancer drug causing a free-radical-mediated cardiotoxicity, was administered intraperitoneally to some rats. The onset of an oxidative damage was indicated by the increase in the plasma level of reactive oxygen metabolites coupled to a decrease in the total antioxidant activity but without modification of glutathione peroxidase activity, which were observed in all rats, independent of the dietary treatment. On the contrary, in the heart, selenium supplementation caused an increase in the total antioxidant activity, glutathione concentration, and glutathione peroxidase and catalase activities leading to a decreased generation of reactive oxygen metabolites. These results clearly indicate that a moderate Se dietary supplementation counteracts adriamycin-induced cardiotoxicity by preservation of endogenous antioxidants.
Department of Biochemistry G. Moruzzi, Nutrition Research Center, University of Bologna, via Irnerio, 48, 40126 Bologna, Italy.
Francesca
F
Danesi
Marco
M
Malaguti
Mattia
M
Di Nunzio
Magda
M
Maranesi
Pier L
PL
Biagi
Alessandra
A
Bordoni
D000818:Animals; D019587:Dietary Supplements; D004317:Doxorubicin / Q000008:administration & dosage / Q000009:adverse effects*; D006331:Heart Diseases / Q000139:chemically induced* / Q000517:prevention & control*; D008297:Male; D018384:Oxidative Stress; D051381:Rats; D017208:Rats, Wistar; D012643:Selenium / Q000008:administration & dosage*
D004317:Doxorubicin; D012643:Selenium