title: Effect of carnosine treatment on oxidative stress in serum, apoB-containing lipoproteins fraction and erythrocytes of aged rats.
abstract: One of the mechanisms underlying the aging process is proposed to be oxidative damage by free radicals. Carnosine (β-alanyl-L-histidine) is a dipeptide with antioxidant properties. In this study, we investigated the effect of carnosine supplementation on oxidative stress in serum, apoB-containing lipoproteins (LDL + VLDL) and erythrocytes of young and aged rats. At the initiation of the study, young and aged rats were 5 and 22 months old, respectively. Carnosine (250 mg/kg, daily, i.p.) was administered for 1 month to young and aged rats. We found that serum malondialdehyde (MDA) and diene conjugate (DC) levels and endogenous DC and copper-induced MDA levels in the LDL+ VLDL fraction increased in aged rats, but there was no change in plasma antioxidant activity. Endogenous DC and H(2)O(2)-induced MDA levels were also higher, but glutathione (GSH) levels were lower in erythrocytes of aged rats. Administration of carnosine for 1 month to aged rats resulted in decreased levels of MDA and DC in serum, the LDL + VLDL fraction and erythrocytes and increased levels of GSH in erythrocytes. Our findings indicate that in vivo carnosine treatment may be useful for the decrease in aged-induced oxidative stress in serum, the LDL + VLDL fraction and erythrocytes.
authors.affiliation: Department of Biochemistry, Istanbul Medical Faculty, Istanbul University, Çapa, 34093, Istanbul, Turkey.
authors.forename: Ahmet F
authors.initials: AF
authors.lastname: Aydín
authors.forename: Zeynep
authors.initials: Z
authors.lastname: Küskü-Kiraz
authors.forename: Semra
authors.initials: S
authors.lastname: Doğru-Abbasoğlu
authors.forename: Müjdat
authors.initials: M
authors.lastname: Uysal
mesh_terms: D000375:Aging; D000818:Animals; D000975:Antioxidants / Q000378:metabolism / Q000494:pharmacology*; D001055:Apolipoproteins B / Q000097:blood; D002336:Carnosine / Q000494:pharmacology*; D004912:Erythrocytes / Q000187:drug effects* / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000633:toxicity; D008077:Lipoproteins, LDL / Q000097:blood; D008079:Lipoproteins, VLDL / Q000097:blood; D008297:Male; D008315:Malondialdehyde / Q000097:blood; D018384:Oxidative Stress / Q000187:drug effects*; D051381:Rats; D017208:Rats, Wistar
chemical_list: D000975:Antioxidants; D001055:Apolipoproteins B; D008077:Lipoproteins, LDL; D008079:Lipoproteins, VLDL; D008315:Malondialdehyde; D002336:Carnosine; D006861:Hydrogen Peroxide