title: Leptin levels in patients with thalassemia major.
abstract: OBJECTIVE
  Patients with thalassemia major often present endocrine abnormalities due to dysfunction in their hypothalamic-pituitary axis. Leptin, an adipocyte derived hormone, primarily acts in hypothalamus and its deficiency in the ob/ob mouse results in persistent immaturity of its hypothalamic-pituitary function. The aim of the study was to evaluate leptin levels in thalassemic patients.
  
  
  METHODS
  The study involved 33 adult patients (11 males), mean age (SD) 19.3 years (4.4) and a group of 12 prepubertal boys, mean age (SD): 7 years (1.7) with homozygous beta-thalassemia.
  
  
  RESULTS
  Mean (SD) leptin concentration was 3.2 (3.3) ng/mL in thalassemic males and 8.6 (3.3) ng/mL in thalassemic females; values significantly lower than matched normal subjects. In the group of prepubertal thalassemic children, leptin levels were also lower compared with matched healthy children, although the difference was not statistically significant.
  
  
  CONCLUSIONS
  In conclusion, low leptin levels were observed in thalassemic patients, which may be due to a toxic effect of iron to adipocytes.
authors.affiliation: Department of Growth and Development, P. & A. Kyriakou Children's Hospital, Athens, Greece.
authors.forename: F
authors.initials: F
authors.lastname: Karachaliou
authors.forename: E
authors.initials: E
authors.lastname: Vlachopapadopoulou
authors.forename: M
authors.initials: M
authors.lastname: Theochari
authors.forename: E
authors.initials: E
authors.lastname: Konstandellou
authors.forename: S
authors.initials: S
authors.lastname: Michalados
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D020738:Leptin / Q000097:blood*; D008297:Male; D017086:beta-Thalassemia / Q000097:blood*
chemical_list: D020738:Leptin