title: Leptin production in pre- and postmenopausal women.
abstract: OBJECTIVE
  To investigate the differences in leptin production between pre- and postmenopausal women.
  
  
  METHODS
  Subjects were 75 pre- and 75 postmenopausal women. Age, height, weight, and body mass index (BMI, wt/ht(2)) were recorded. Serum leptin levels were measured by RIA. Total body fat mass and percentage of body fat mass were measured by whole-body scanning with dual-energy X-ray absorptiometry. Serum leptin levels, the ratio of serum leptin levels to total body fat mass (leptin-fat mass ratio), baseline characteristics, and anthropometric variables were compared between the two groups. In all subjects (n=150), relationship of serum leptin levels with menopausal status (pre- and postmenopause) was investigated by univariate and multiple regression analysis.
  
  
  RESULTS
  Serum leptin levels in premenopausal women 8.4+/-4.8 ng/ml, which did not differ from that in postmenopausal women (9.2+/-7.1 ng/ml). Total body fat mass, percentage of body fat mass, and BMI did not differ between the two groups. Leptin-fat mass ratio in premenopausal women was 0.43+/-0.17 ng/ml/kg, which did not differ from that in postmenopausal women (0.44+/-0.24 ng/ml/kg). On both univariate and multiple regression analysis, serum leptin levels were not correlated with menopausal status.
  
  
  CONCLUSIONS
  Menopausal status does not have a significant impact on leptin production.
authors.affiliation: Department of Obstetrics and Gynecology, Faculty of Medicine, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima 890-8520, Japan. tomy@m3.kufm.kagoshima-u.ac.jp
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Douchi
authors.forename: Ichiro
authors.initials: I
authors.lastname: Iwamoto
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Yoshimitsu
authors.forename: Shoichiro
authors.initials: S
authors.lastname: Kosha
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Nagata
mesh_terms: D000328:Adult; D000368:Aged; D001823:Body Composition; D015992:Body Mass Index; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D020738:Leptin / Q000097:blood*; D008875:Middle Aged; D017698:Postmenopause / Q000378:metabolism*; D017697:Premenopause / Q000378:metabolism*; D012044:Regression Analysis; D015203:Reproducibility of Results
chemical_list: D020738:Leptin