title: Frequency of increased aminotransferases levels and associated metabolic abnormalities in obese and overweight children of an elementary school in Mexico City.
abstract: BACKGROUND
  Elevated ALT is an indirect marker of NAFLD in patients with non-alcohol abuse and without other known causes of chronic hepatitis. Obesity, type 2 diabetes and some dyslipidemias are associated to this condition. The purpose of this study was to determine the frequency of increased aminotransferases and associated metabolic anomalies among overweight and obese children.
  
  
  METHODS
  Children from an elementary school with obesity or overweight were included. Medical history and anthropometrics measurements were recorded and serum liver function tests, lipid profile, glucose and insulin levels, and HOMA index were determined. NAFLD diagnosis was considered in those children with ALT>40 U/L and AST/ALT ratio<1 after exclusion of other causes of chronic hepatitis.
  
  
  RESULTS
  Increase ALT levels (>40 U/L) were found in 34/ 80 (42%) obese and overweight children; mean age was 9.5+/-1.1 years and mean BMI of 25.8+/-3. The metabolic abnormalities in the study group were similar, there were no differences in insulin concentration, insulin resistance determined by HOMA-IR Index, serum lipid profile and serum glucose between children with or without increased ALT.
  
  
  CONCLUSIONS
  The frequency (42%) of elevated ALT levels in children with excess body weight in this study was greater to those reported in other pediatric populations. There were no differences among the metabolic alterations with or without increased ALT; these findings support that the principal pathogenic factor involved in the development of the hepatic injury may be located in the liver.
authors.affiliation: Departamento de Gastroenterología, Hospital de Pediatría, Centro Médico Nacional Siglo XXI, Delegación Cuauhtémoc, México. judithflores1@hotmail.com
authors.forename: Judith
authors.initials: J
authors.lastname: Flores-Calderón
authors.forename: Rita A
authors.initials: RA
authors.lastname: Gómez-Díaz
authors.forename: Gabriela
authors.initials: G
authors.lastname: Rodríguez-Gómez
authors.forename: Segundo
authors.initials: S
authors.lastname: Morán-Villota
mesh_terms: D000410:Alanine Transaminase / Q000097:blood*; D001786:Blood Glucose / Q000378:metabolism; D015992:Body Mass Index; D002648:Child; D002784:Cholesterol / Q000097:blood; D005260:Female; D006801:Humans; D007328:Insulin / Q000097:blood; D008297:Male; D008800:Mexico; D009765:Obesity / Q000097:blood / Q000201:enzymology*; D050177:Overweight / Q000502:physiology*; D012574:Schools; D014280:Triglycerides / Q000097:blood; D014504:Urban Health
chemical_list: D001786:Blood Glucose; D007328:Insulin; D014280:Triglycerides; D002784:Cholesterol; D000410:Alanine Transaminase