title: Serum leptin and weight loss in severely obese patients undergoing biliopancreatic diversion.
abstract: OBJECTIVE
  To evaluate the influence of body fat and food intake on serum leptin concentration.
  
  
  METHODS
  Longitudinal study of a group of obese patients prior to and at, long term follow-up, after biliopancreatic diversion (BPD), when body weight was steadily reduced and food consumption was similar to or greater than preoperatively.
  
  
  RESULTS
  In obese patients, very high serum leptin concentrations were found. Following the operation, with the body weight stable and normalized, a sharp fall of serum leptin concentration had occurred, with values returned to normal range.
  
  
  CONCLUSIONS
  The changes in serum leptin concentration observed in the long term after weight loss are substantially accounted for by the loss of body fat and appear unrelated to the reduction of oral food intake.
authors.affiliation: Istituto di Clinica Chirurgica, Università di Genova, Ospedale San Martino, Italy.
authors.forename: G F
authors.initials: GF
authors.lastname: Adami
authors.forename: R
authors.initials: R
authors.lastname: Cordera
authors.forename: A
authors.initials: A
authors.lastname: Campostano
authors.forename: A
authors.initials: A
authors.lastname: Bressani
authors.forename: F
authors.initials: F
authors.lastname: Cella
authors.forename: N
authors.initials: N
authors.lastname: Scopinaro
mesh_terms: D000293:Adolescent; D000328:Adult; D015904:Biliopancreatic Diversion; D015992:Body Mass Index; D016001:Confidence Intervals; D006801:Humans; D020738:Leptin; D008297:Male; D008875:Middle Aged; D009767:Obesity, Morbid / Q000097:blood* / Q000378:metabolism / Q000601:surgery; D011506:Proteins / Q000032:analysis*; D015431:Weight Loss
chemical_list: D020738:Leptin; D011506:Proteins