title: Effects of melatonin and acetylsalicylic acid against hepatic oxidative stress after bile duct ligation in rat.
abstract: The aim of this study was to assess the effect of melatonin and acetylsalicylic acid (ASA) on hepatic damage induced by bile duct ligation (BDL).
  
  
  METHODS
  Male Sprague-Dawley rats were subjected to either sham operation or common BDL before treatment with ASA, melatonin or vehicle. Hepatic superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px) enzyme activities and reduced glutathione (GSH), malondialdehyde (MDA) and nitric oxide (NO) levels were evaluated.
  
  
  RESULTS
  Our results have indicated that BDL caused a significant increase in lipid peroxidation whereas a statistically insignificant decrease in GSH level and some of the antioxidant enzyme activities. Both MEL and ASA administrations, either separately or together, decreased MDA whereas co-administration of MEL with ASA increased GSH levels in BDL rats.
  
  
  CONCLUSIONS
  CAT activity and MEL level decreased in the liver tissues of rats with BDL after administration of either melatonin alone or with ASA. However, melatonin and ASA administration increases liver tissue GSH levels in BDL ligated rats
authors.affiliation: Department of Physiology, Inonu University, Medical School, 44280 Malatya, Turkey. hemre@inonu.edu.tr
authors.forename: M H
authors.initials: MH
authors.lastname: Emre
authors.forename: A
authors.initials: A
authors.lastname: Polat
authors.forename: M
authors.initials: M
authors.lastname: Eşrefoğlu
authors.forename: A B
authors.initials: AB
authors.lastname: Karabulut
authors.forename: M
authors.initials: M
authors.lastname: Gül
mesh_terms: D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology; D000975:Antioxidants / Q000494:pharmacology; D001241:Aspirin / Q000494:pharmacology*; D002374:Catalase / Q000378:metabolism; D001651:Cholestasis, Extrahepatic / Q000188:drug therapy* / Q000378:metabolism* / Q000473:pathology; D004359:Drug Therapy, Combination; D005978:Glutathione / Q000378:metabolism; D005979:Glutathione Peroxidase / Q000378:metabolism; D008026:Ligation; D008099:Liver / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology; D008297:Male; D008550:Melatonin / Q000494:pharmacology*; D009569:Nitric Oxide / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects*; D051381:Rats; D017207:Rats, Sprague-Dawley; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D000975:Antioxidants; D009569:Nitric Oxide; D002374:Catalase; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D005978:Glutathione; D008550:Melatonin; D001241:Aspirin