title: The naloxone test in Klinefelter syndrome.
abstract: AIM TO THE STUDY: The investigation of the influence of anti-opioid drug on hypophyseal and gonadal hormones secretion in case of Klinefelter syndrome.
  
  
  METHODS
  The naloxone test (0,4 mg iv) was performed in 14 patients with Klinefelter syndrome aged from 19 to 32 and in 12 age matched control subjects with azoospermia and normal spermatogenesis in testicular histology. The plasma levels of FSH, LH, prolactin, testosterone and estradiol were established before and after 30, 60, 60 and 120 minutes respectively, following the drug administration.
  
  
  RESULTS
  Basal FSH, prolactin and estradiol levels were significantly higher whereas basal testosterone was significantly lower in patients with Klinefelter syndrome than in the control group. After the naloxone administration the mean plasma prolactin level decreased significantly (p=0.01) in Klinefelter subjects. The respective diminution in control group was not significant. The levels of FSH and LH as well as testosterone and estradiol did not change during the naloxone test in both Klinefelter and control subjects.
  
  
  CONCLUSIONS
  The naloxone administration in Klinefelter syndrome caused the decrease in plasma prolactin levels but did not affect the plasma level of another hypophyseal and gonadal hormones. The opioid controlled gonadotropin secretion is altered in case of Klinefelter syndrome.
authors.affiliation: 1st Department of Obstetrics and Gynecology, Medical University of Warsaw, Poland. mwielgos@amwaw.edu.pl
authors.forename: Miroslaw
authors.initials: M
authors.lastname: Wielgos
authors.forename: Leszek
authors.initials: L
authors.lastname: Bablok
authors.forename: Stanislaw
authors.initials: S
authors.lastname: Fracki
authors.forename: Maciej
authors.initials: M
authors.lastname: Czaplicki
authors.forename: Longin
authors.initials: L
authors.lastname: Marianowski
mesh_terms: D000328:Adult; D004958:Estradiol / Q000097:blood; D005640:Follicle Stimulating Hormone / Q000097:blood; D006801:Humans; D007030:Hypothalamo-Hypophyseal System / Q000187:drug effects*; D007713:Klinefelter Syndrome / Q000097:blood* / Q000503:physiopathology*; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D009270:Naloxone / Q000008:administration & dosage*; D009292:Narcotic Antagonists / Q000008:administration & dosage*; D011388:Prolactin / Q000097:blood; D013739:Testosterone / Q000097:blood
chemical_list: D009292:Narcotic Antagonists; D009270:Naloxone; D013739:Testosterone; D004958:Estradiol; D011388:Prolactin; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone