Title : Effect of phorbol ester on stimulus-secretion coupling mechanisms in gonadotropin releasing hormone-stimulated pituitary gonadotrophs.

Pub. Date : 1987 Nov 13

PMID : 2825684






4 Functional Relationships(s)
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1 Addition of the tumor promoter phorbol ester 12-O-tetradecanoylphorbol-13-acetate (TPA), at concentrations which activate pituitary protein C kinase, to cultured pituitary cells resulted in up-regulation of GnRH receptors (155% at 4 h). Tetradecanoylphorbol Acetate gonadotropin releasing hormone 1 Homo sapiens
2 Addition of the tumor promoter phorbol ester 12-O-tetradecanoylphorbol-13-acetate (TPA), at concentrations which activate pituitary protein C kinase, to cultured pituitary cells resulted in up-regulation of GnRH receptors (155% at 4 h). Tetradecanoylphorbol Acetate gonadotropin releasing hormone 1 Homo sapiens
3 The stimulatory effect of GnRH on [3H]inositol phosphates (Ins-P) production in myo-[2-3H]inositol prelabeled pituitary cells was not inhibited by prior treatment of the cells with TPA (10(-9)-10(-7) M). Tetradecanoylphorbol Acetate gonadotropin releasing hormone 1 Homo sapiens
4 Higher concentrations of TPA (10(-6)-10(-5) M) inhibited the effect of GnRH on [3H]Ins-P production. Tetradecanoylphorbol Acetate gonadotropin releasing hormone 1 Homo sapiens