Abstract:Gonadotropin releasing hormone (GnRH) stimulates both transcription and secretion of the alpha subunit of the gonadotropins in a Ca2+-dependent fashion. In this study, we examined the role of Ca2+ as the signal coupling agonist occupancy of GnRH receptors to hormone secretion using the gonadotropic cell line alphaT3-1. Treatment of alphaT3-1 cells for 60 min with GnRH (0.1-100 nM), veratridine (50 microM) or high K+ (56 mM) was completely ineffective in stimulating secretion. The lack of effect occurred in spi… Show more
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