title: Protective effect of alpha-tocopherol on oxidative stress in experimental pulmonary fibrosis in rats.
abstract: The study was undertaken to investigate the influence of alpha-tocopherol (vitamin E) on malondialdehyde (MDA) and glutathione (GSH) levels and catalase (CAT) activity in lung of rats with bleomycin-induced pulmonary fibrosis (PF). Fourteen Wistar-albino rats were randomly divided into two groups of seven animals each. The first group was treated intra-tracheally with bleomycin hydrochloride (BM group); the second group was also instilled with BM but received injections of alpha-tocopherol twice a week (BM + E group). The third group was treated in the same manner with saline solution only, acting as controls (C). There were decreases in GSH level and CAT activity while an increase in MDA level in BM group was found compared to the control group (p < 0.05). Vitamin E had a regulator effect on these parameters. After administration of alpha-tocopherol, the increase in GSH level and CAT activity and the decrease in MDA level were seen in BM + E group compared to BM group (p < 0.05). Distinct histopathological changes were found in the BM group compared to the untreated rats. Less severe fibrotic lesions were also observed in the BM + E group. The results show that vitamin E is effective on the prevention of BM-induced PF, as indicated by differences in the lung levels of oxidants and antioxidants.
authors.affiliation: Department of Biochemistry, Faculty of Veterinary Medicine, Yüzüncü Yil University, Van, Turkey. ydeger65@hotmail.com
authors.forename: Yeter
authors.initials: Y
authors.lastname: Deger
authors.forename: Fatmagul
authors.initials: F
authors.lastname: Yur
authors.forename: Ali
authors.initials: A
authors.lastname: Ertekin
authors.forename: Nihat
authors.initials: N
authors.lastname: Mert
authors.forename: Semiha
authors.initials: S
authors.lastname: Dede
authors.forename: Handan
authors.initials: H
authors.lastname: Mert
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000494:pharmacology; D001761:Bleomycin / Q000008:administration & dosage / Q000633:toxicity*; D002374:Catalase / Q000378:metabolism; D005978:Glutathione / Q000378:metabolism; D008168:Lung / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects*; D011658:Pulmonary Fibrosis / Q000139:chemically induced / Q000378:metabolism / Q000517:prevention & control*; D011897:Random Allocation; D051381:Rats; D017208:Rats, Wistar; D024502:alpha-Tocopherol / Q000494:pharmacology*
chemical_list: D000975:Antioxidants; D001761:Bleomycin; D008315:Malondialdehyde; D002374:Catalase; D005978:Glutathione; D024502:alpha-Tocopherol