title: [Effects of nasal continuous positive airway pressure on serum leptin concentration and the metabolic parameters in obstructive sleep apnea hypopnea syndrome].
abstract: OBJECTIVE
  To evaluate the effects of nasal continuous positive airway pressure (nCPAP) on serum leptin concentration and the metabolic parameters in patients with obstructive sleep apnea/hypopnea syndrome (OSAHS).
  
  
  METHODS
  Serum leptin levels and true insulin (TI) levels were measured before and after one night nCPAP therapy in 18 patients. Eight patients received regular nCPAP treatment and had no change of body weight (BMI change < or = 1.5 kg/m2 from baseline) were recruited to the reassessment study 7.5 months after therapy.
  
  
  RESULTS
  After one night use of nCPAP, there was a significant decrease in serum leptin [(8.47 +/- 0.62) microg/L vs (7.32 +/- 0.64) microg/L, P = 0.022] without change in other parameters. After 7.5 months of nCPAP treatment, serum leptin levels continued to decrease significantly without changes in BMI [(8.35 +/- 0.83) microg/L vs (6.05 +/- 0.78) microg/L; P = 0.036), and fast blood glucose (FBG) and true insulin (TI) also decreased significantly (P = 0.036) in OSAHS patients. However, triglyceral (TG) and cholesterol (Chol) maintained the pretreatment level (P > 0.05).
  
  
  CONCLUSIONS
  OSAHS may have significant effects on the serum leptin levels and the correction of sleep disordered breathing by nCPAP can reduce the serum leptin levels. Decrease of leptin was independent of BMI change. The glucose metabolic disturbance and insulin resistance in OSAHS were improved after 7.5 months of nCPAP treatment.
authors.affiliation: Department of Respiratory, PUMC Hospital, CAMS and PUMC, Beijing 100730, China. huangrong0212@163.com
authors.forename: Rong
authors.initials: R
authors.lastname: Huang
authors.forename: Xi-zhen
authors.initials: XZ
authors.lastname: Huang
authors.forename: Hui-ge
authors.initials: HG
authors.lastname: Wang
authors.forename: Ming
authors.initials: M
authors.lastname: Li
authors.forename: Yi
authors.initials: Y
authors.lastname: Xiao
mesh_terms: D000328:Adult; D045422:Continuous Positive Airway Pressure; D005260:Female; D006801:Humans; D020738:Leptin / Q000097:blood*; D008297:Male; D020181:Sleep Apnea, Obstructive / Q000097:blood* / Q000628:therapy
chemical_list: D020738:Leptin