title: Steatosis and hepatic markers before and shortly after bariatric surgery.
abstract: BACKGROUND
  We present new findings on liver steatosis detected in a group of 20 morbidly obese patients who were reassessed shortly after bariatric surgery (BS) by assaying hepatic markers in their serum.
  
  
  METHODS
  We assayed aspartate aminotransferase (AST), alanine aminotransferase, lactate dehydrogenase, alkaline phosphatase, gamma-glutamyl transferase (gamma-GT), cholinesterase, cholesterol, total protein, and albumin, and measured the weight and the body mass index (BMI) of patients, before and one and three months after surgery.
  
  
  RESULTS
  There were significant reductions in BMI following surgery and also falls in transaminases and gamma-GT activities three months after BS. No changes occurred in other parameters between periods, except that cholesterol was above reference values before BS and fell to normal levels three months after BS.
  
  
  CONCLUSIONS
  We suggest that before undergoing surgery, the patients suffered from slight steatosis, while after BS the reduction in AST and gamma-GT indicated that this condition was corrected within three months. Moreover, these enzymes may be useful markers for excess fat in the liver.
authors.affiliation: Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas de Araraquara-UNESP-SP. Rua Expedicionários do Brasil n. 1621, Araraquara-SP 14801-902, Brazil.
authors.forename: M R A
authors.initials: MR
authors.lastname: de Abreu
authors.forename: A P P
authors.initials: AP
authors.lastname: Ramos
authors.forename: R C
authors.initials: RC
authors.lastname: Vendramini
authors.forename: I L
authors.initials: IL
authors.lastname: Brunetti
authors.forename: M T
authors.initials: MT
authors.lastname: Pepato
mesh_terms: D000410:Alanine Transaminase / Q000097:blood; D000469:Alkaline Phosphatase / Q000097:blood; D001219:Aspartate Aminotransferases / Q000097:blood; D050110:Bariatric Surgery; D001663:Bilirubin / Q000097:blood; D015415:Biomarkers / Q000097:blood; D002802:Cholinesterases / Q000097:blood; D005234:Fatty Liver / Q000097:blood*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007770:L-Lactate Dehydrogenase / Q000097:blood; D008297:Male; D015999:Multivariate Analysis; D009767:Obesity, Morbid / Q000150:complications / Q000473:pathology* / Q000601:surgery; D011184:Postoperative Period; D012189:Retrospective Studies; D016896:Treatment Outcome; D005723:gamma-Glutamyltransferase / Q000097:blood
chemical_list: D015415:Biomarkers; D007770:L-Lactate Dehydrogenase; D005723:gamma-Glutamyltransferase; D001219:Aspartate Aminotransferases; D000410:Alanine Transaminase; D002802:Cholinesterases; D000469:Alkaline Phosphatase; D001663:Bilirubin