Demirel LC, Weiss JM, Polack S, Unlü C, Diedrich K, Ortmann O. Effect of the gonadotropin-releasing hormone antagonist ganirelix on cyclic adenosine monophosphate accumulation of human granulosa-lutein cells.
Fertil Steril 2000;
74:1001-7. [PMID:
11056249 DOI:
10.1016/s0015-0282(00)01552-1]
[Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE
To evaluate whether the GnRH antagonist ganirelix exerts an effect on cyclic adenosine monophosphate (cAMP) production of human granulosa-lutein (GL) cells in vitro.
DESIGN
In vitro cell culture study.
SETTING
Research laboratory of a university hospital.
PATIENT(S)
Mural GL and cumulus cells were obtained from 15 patients on whom controlled ovarian hyperstimulation was being performed for intracytoplasmic sperm injection treatment.
INTERVENTION(S)
Mural GL and cumulus cells were cultured for 48 hours with and without 1 nM ganirelix or triptorelin. For the last 6 hours, the cells were either exposed to 1-5 IU hCG or left unstimulated.
MAIN OUTCOME MEASURE(S)
At the end of the culturing period, the intracellular and extracellular cAMP accumulations were measured by an (125)I-scintillation proximity assay.
RESULT(S)
hCG induced dose-dependent increases in total cAMP accumulation. Stimulation with 1 IU/mL hCG resulted in 9-fold and 13-fold increases, and 5 IU/mL hCG resulted in 19-fold and 14-fold increases in total cAMP release from cumulus and mural GL cells, respectively. On the other hand, treatments with 1 nM GnRH antagonist ganirelix and 1 nM GnRH agonist triptorelin did not exert any significant changes on the basal and hCG-stimulated cAMP accumulation of mural GL cells and cumulus cells as compared with controls.
CONCLUSION(S)
Ganirelix does not influence basal and hCG-stimulated cAMP accumulation of human GL cells in vitro. cAMP is apparently not involved in the mechanism of action of GnRH analogs in human ovary.
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