title: Actions of gonadotropin-releasing hormone antagonists on steroidogenesis in human granulosa lutein cells.
abstract: OBJECTIVE
  GnRH antagonists have recently been introduced for the prevention of premature LH surges during controlled ovarian hyperstimulation (COH). We have here investigated whether the GnRH antagonists cetrorelix and ganirelix exert effects on ovarian steroidogenesis. Since there is some controversy about the action of GnRH agonists in the human ovary we also tested the effect of triptorelin on steroid production in cultured human granulosa lutein cells.
  
  
  METHODS
  Cells were obtained from patients treated with different protocols of COH. In addition to gonadotropins they received triptorelin, cetrorelix, ganirelix or no GnRH analogue.
  
  
  RESULTS
  Such in vivo treatment did not result in significant effects of triptorelin or the two GnRH antagonists on spontaneous or human chorionic gonadotropin (hCG)-stimulated steroidogenesis. To exclude the possibility that the in vivo treatment might not affect in vitro steroid production because of low or absent peptide activity, we performed in vitro treatments with triptorelin, cetrorelix and ganirelix for up to 96 h. However, these treatment paradigms did not influence basal or hCG-stimulated steroid production.
  
  
  CONCLUSIONS
  We conclude that GnRH antagonists do not exert any significant effects on ovarian steroidogenesis in vitro and therefore their introduction into protocols of COH is unlikely to impair ovarian function.
authors.affiliation: Department of Obstetrics and Gynecology, Medical University Lubeck, 23538 Lübeck, Germany.
authors.forename: J M
authors.initials: JM
authors.lastname: Weiss
authors.forename: K
authors.initials: K
authors.lastname: Oltmanns
authors.forename: E M
authors.initials: EM
authors.lastname: Gürke
authors.forename: S
authors.initials: S
authors.lastname: Polack
authors.forename: F
authors.initials: F
authors.lastname: Eick
authors.forename: R
authors.initials: R
authors.lastname: Felberbaum
authors.forename: K
authors.initials: K
authors.lastname: Diedrich
authors.forename: O
authors.initials: O
authors.lastname: Ortmann
mesh_terms: D002478:Cells, Cultured; D005260:Female; D007987:Gonadotropin-Releasing Hormone / Q000031:analogs & derivatives / Q000037:antagonists & inhibitors* / Q000494:pharmacology; D006107:Granulosa Cells / Q000378:metabolism*; D006727:Hormone Antagonists / Q000494:pharmacology*; D006801:Humans; D014975:Lutein / Q000378:metabolism*; D012333:RNA, Messenger / Q000096:biosynthesis; D011966:Receptors, LHRH / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013256:Steroids / Q000096:biosynthesis*; D017329:Triptorelin Pamoate / Q000494:pharmacology
chemical_list: D006727:Hormone Antagonists; D012333:RNA, Messenger; D011966:Receptors, LHRH; D013256:Steroids; D017329:Triptorelin Pamoate; D007987:Gonadotropin-Releasing Hormone; C061018:ganirelix; C062876:cetrorelix; D014975:Lutein