title: Serum leptin level can be a negative marker of hepatocyte damage in nonalcoholic fatty liver.
abstract: BACKGROUND
  The aim of this study was to determine whether leptin and insulin resistance (IR) showed differences between steatotic patients with and without elevated serum transaminases.
  
  
  METHODS
  The study included 32 patients with fatty liver and high serum transaminase level (group I), 31 patients with fatty liver and normal serum transaminase level (group II), and 8 nonobese and nonsteatotic controls. The presence of steatosis was demonstrated by ultrasonography. Due to the effect of body mass index (BMI) on leptin levels, groups I and II were divided to form four subgroups for analysis (group IA, BMI <or=30; group IB, BMI >30; group IIA, BMI <or=30; and group IIB, BMI >30.
  
  
  RESULTS
  The serum leptin levels in group IIB were significantly higher than the levels in group IB ( P = 0.017). Serum leptin was also higher in group IIA than in group IA, but this difference was not statistically significant ( P = 0.097). Logistic regression analysis revealed a significant negative correlation between serum leptin level and the presence of a high transaminase level (odds ratio, 0.97; 95% confidence interval, 0.95-0.99). The levels of IR in the four patient groups were comparable, but the controls had significantly lower IR levels than group IIA.
  
  
  CONCLUSIONS
  Elevated serum leptin seems to be a feature of steatotic patients with normal transaminase levels, and the level of serum leptin seems to decrease as the hepatocyte injury develops. IR is a common feature of fatty liver disease, irrespective of the presence of hepatocellular necrosis.
authors.affiliation: Department of Gastroenterology, Başkent University Faculty of Medicine, Adana Teaching and Medical Research Center, Dadaloethlu Mahallesi, 39 Sokak, No: 6, 01250 Adana, Turkey.
authors.forename: Ender
authors.initials: E
authors.lastname: Serin
authors.forename: Birol
authors.initials: B
authors.lastname: Ozer
authors.forename: Yüksel
authors.initials: Y
authors.lastname: Gümürdülü
authors.forename: Fazilet
authors.initials: F
authors.lastname: Kayaselçuk
authors.forename: Kemal
authors.initials: K
authors.lastname: Kul
authors.forename: Sedat
authors.initials: S
authors.lastname: Boyacioğlu
mesh_terms: D000328:Adult; D015415:Biomarkers; D015992:Body Mass Index; D018450:Disease Progression; D005234:Fatty Liver / Q000097:blood* / Q000473:pathology; D005235:Fatty Liver, Alcoholic; D005260:Female; D022781:Hepatocytes / Q000473:pathology*; D006801:Humans; D007333:Insulin Resistance / Q000502:physiology; D020738:Leptin / Q000097:blood*; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000097:blood
chemical_list: D015415:Biomarkers; D020738:Leptin