title: Exogenous melatonin treatment reduces hepatocyte damage in rats with experimental acute pancreatitis.
abstract: OBJECTIVE
  The hormone melatonin affects cellular immunity in particular and the immune system in general both directly and indirectly. We report our evaluation of the effects of decreasing and increasing serum melatonin levels on hepatocyte damage in rats with experimental acute pancreatitis.
  
  
  METHODS
  Wistar Albino rats with experimentally induced acute pancreatitis were divided into three groups of ten rats each: (1) control (induced acute pancreatitis only); (2) rats with induced acute pancreatitis plus surgical pinealectomy (no melatonin injections); (3) rats with induced acute pancreatitis plus injections of exogenous melatonin. The effects of melatonin levels were evaluated using biochemical and histopathological parameters.
  
  
  RESULTS
  Rats undergoing the pinealectomy had increased amylase and lactate dehydrogenase (LDH) levels, while those receiving injections of exogenous melatonin had decreased amylase, aspartate transaminase, LDH, and bilirubin levels but increased levels of alanine transferase levels.
  
  
  CONCLUSIONS
  Melatonin may have a therapeutic or protective effect on acute pancreatitis and obstructive jaundice.
authors.affiliation: Department of General Surgery, Abant Izzet Baysal University Medical School, 14280, Bolu, Turkey. cavitcol@yahoo.com
authors.forename: Cavit
authors.initials: C
authors.lastname: Cöl
authors.forename: Kahraman
authors.initials: K
authors.lastname: Dinler
authors.forename: Oğuz
authors.initials: O
authors.lastname: Hasdemir
authors.forename: Oktay
authors.initials: O
authors.lastname: Büyükaşik
authors.forename: Güler
authors.initials: G
authors.lastname: Buğdayci
authors.forename: Hakan
authors.initials: H
authors.lastname: Terzi
mesh_terms: D000410:Alanine Transaminase / Q000378:metabolism; D000818:Animals; D000975:Antioxidants / Q000008:administration & dosage / Q000627:therapeutic use*; D001219:Aspartate Aminotransferases / Q000378:metabolism; D001663:Bilirubin / Q000097:blood; D004195:Disease Models, Animal; D022781:Hepatocytes / Q000187:drug effects* / Q000473:pathology; D007274:Injections, Intraperitoneal; D041781:Jaundice, Obstructive / Q000378:metabolism / Q000473:pathology / Q000517:prevention & control*; D008099:Liver / Q000187:drug effects / Q000378:metabolism / Q000473:pathology*; D008297:Male; D008550:Melatonin / Q000008:administration & dosage / Q000627:therapeutic use*; D019283:Pancreatitis, Acute Necrotizing / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology; D051381:Rats; D016896:Treatment Outcome
chemical_list: D000975:Antioxidants; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase; D008550:Melatonin; D001663:Bilirubin