title: Effects of dietary selenium of organic form against lead toxicity on the antioxidant system in Cyprinus carpio.
abstract: In this study was evaluated potential protective effect of organic selenium (Se) on heavy metal stress induced by lead (Pb) in Cyprinus carpio. For this reason, C. carpio was exposed to sublethal concentration of Pb (1.5 mg/L Pb(NO3)2) for 14 days. The fish were fed a basal (control; measured 0.55 mg/kg Se) diet or a basal diet supplemented with 2.50 mg/kg (measured 2.92 mg/kg Se) organic Se (Sel-Plex(®)) during the experiment period. The variations in glutathione peroxidase (GSH-Px), glutathione S-transferase (GST) activities, and levels of reduced glutathione (GSH) with malondialdehyde (MDA) in liver and brain tissues of C. carpio were investigated in experimental groups. GSH levels in liver and brain tissues were significantly decreased by exposure to Pb. GST activity was significantly increased (p < 0.05) in liver tissue, but decreased in brain of treated fish by exposure to Pb. Also, GSH-Px activity was significantly increased in liver tissue, but decreased in brain of Pb-treated fish. Levels of MDA were increased in liver and brain of Pb-treated fish. The organic Se treatment for Pb-intoxicated animals improved activities of GSH-Px, GST and levels of MDA within normal limits. Supplemented Se could be able to improve Pb-induced oxidative stress by decreasing lipid peroxidation and regulating antioxidant defense system in tissues.
authors: Department of Basic Sciences, Faculty of Fisheries, Mersin University, 33169, Mersin, Turkey, ferbal1111@hotmail.com.
authors: Ferbal
authors: F
authors: Özkan-Yilmaz
authors: Arzu
authors: A
authors: Özlüer-Hunt
authors: Suna Gül
authors: SG
authors: Gündüz
authors: Mehmet
authors: M
authors: Berköz
authors: Serap
authors: S
authors: Yalin
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000008:administration & dosage* / Q000378:metabolism*; D001921:Brain / Q000187:drug effects / Q000378:metabolism; D002347:Carps / Q000378:metabolism*; D019587:Dietary Supplements; D005979:Glutathione Peroxidase / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D007854:Lead / Q000633:toxicity*; D015227:Lipid Peroxidation / Q000187:drug effects; D008099:Liver / Q000187:drug effects / Q000378:metabolism; D008315:Malondialdehyde / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects; D012643:Selenium / Q000008:administration & dosage*
chemical_list: D000975:Antioxidants; D007854:Lead; D008315:Malondialdehyde; D005979:Glutathione Peroxidase; D005982:Glutathione Transferase; D012643:Selenium
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