title: Does plasma leptin concentration predict the nutritional status of hemodialyzed patients with chronic renal failure?
abstract: BACKGROUND
  Patients with chronic renal failure are characterized by hyperleptinemia, and leptin is presumed to be an anorectogenic hormone. The aim of this prospective study was to analyze changes in body composition and parameters of nutritional status in relation to changes in plasma leptin concentration in uremic patients during the first year of hemodialysis therapy.
  
  
  METHODS
  21 patients (10 F, 11 M, mean age 51+/- 3 years, BMI 24.3+/-1.1 kg/m2) were enrolled in this study. Nutritional status was evaluated by anthropometric parameters, estimation of body composition (DEXA method), and biochemical markers (plasma concentrations of albumin, cholesterol, triglycerides, transferrin) and plasma leptin concentration. Tests were performed twice: immediately after initiation of hemodialysis therapy and again 12 months later.
  
  
  RESULTS
  After 12 months of hemodialysis therapy, the changes in body mass (-2.6+/-0.8 kg; p=0.23), total fat mass (TFM) (-0.3+/-0.8 kg; p=0.68) and total lean mass (TLM) (+0.5+/-0.8 kg; p=0.26) were insignificant. Plasma leptin concentration and estimated biochemical nutritional parameters did not change markedly. A significant positive correlation was noticed between TFM and plasma leptin concentration (R=0.521; p=0.02) at the beginning of hemodialysis therapy and between changes in TFM and plasma leptin concentration (R=0.466; p=0.04) after one year.
  
  
  CONCLUSIONS
  Plasma leptin concentration does not predict forthcoming changes in body composition and changes of nutritional status in uremic patients after the first year of hemodialysis.
authors.affiliation: Department of Nephrology, Endocrinology and Metabolic Diseases, Silesian University School of Medical, Katowice, Poland.
authors.forename: Jerzy
authors.initials: J
authors.lastname: Chudek
authors.forename: Marcin
authors.initials: M
authors.lastname: Adamczak
authors.forename: Magdalena
authors.initials: M
authors.lastname: Kania
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Hołowiecka
authors.forename: Wioletta
authors.initials: W
authors.lastname: Rozmus
authors.forename: Franciszek
authors.initials: F
authors.lastname: Kokot
authors.forename: Andrezej
authors.initials: A
authors.lastname: Wiecek
mesh_terms: D001823:Body Composition; D015992:Body Mass Index; D002097:C-Reactive Protein / Q000378:metabolism; D005260:Female; D006801:Humans; D007676:Kidney Failure, Chronic / Q000097:blood* / Q000628:therapy; D020738:Leptin / Q000097:blood*; D008297:Male; D008875:Middle Aged; D009752:Nutritional Status; D011237:Predictive Value of Tests; D006435:Renal Dialysis; D013223:Statistics as Topic; D014511:Uremia / Q000097:blood / Q000628:therapy
chemical_list: D020738:Leptin; D002097:C-Reactive Protein