Title : Effect of phorbol esters on the release of growth hormone and prolactin from rat pituitary cells cultured in monolayer.

Pub. Date : 1984 Oct

PMID : 6149663






9 Functional Relationships(s)
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Compound Name
Protein Name
Organism
1 12-O-tetradecanoyl phorbol-13-acetate (TPA), the most potent phorbol ester, stimulated GH accumulation in the cultured medium in a dose-dependent manner. Tetradecanoylphorbol Acetate gonadotropin releasing hormone receptor Rattus norvegicus
2 12-O-tetradecanoyl phorbol-13-acetate (TPA), the most potent phorbol ester, stimulated GH accumulation in the cultured medium in a dose-dependent manner. Tetradecanoylphorbol Acetate gonadotropin releasing hormone receptor Rattus norvegicus
3 A time course study indicated that TPA mainly stimulates release of GH. Tetradecanoylphorbol Acetate gonadotropin releasing hormone receptor Rattus norvegicus
4 The maximal stimulation of GH release by TPA (100 ng/ml) was 3-4-fold over control. Tetradecanoylphorbol Acetate gonadotropin releasing hormone receptor Rattus norvegicus
5 TPA-stimulated GH release was not affected by the presence of indomethacin, an inhibitor of prostaglandin (PG) synthesis, indicating that PG is not involved in the process of TPA-stimulated GH release. Tetradecanoylphorbol Acetate gonadotropin releasing hormone receptor Rattus norvegicus
6 Co++, a competitive antagonist of Ca++, at 2.0 mM completely suppressed the GH release induced by TPA, and this inhibition was partially reversed by the addition of 2.0 mM Ca++. Tetradecanoylphorbol Acetate gonadotropin releasing hormone receptor Rattus norvegicus
7 Verapamil, a Ca++ channel blocker, reduced TPA-stimulated GH release, and trifluoperazine, an inhibitor of Ca-calmodulin formation, had a similar effect. Tetradecanoylphorbol Acetate gonadotropin releasing hormone receptor Rattus norvegicus
8 Somatostatin (SRIF) also inhibited the GH release by TPA. Tetradecanoylphorbol Acetate gonadotropin releasing hormone receptor Rattus norvegicus
9 These observations are compatible with the idea that Ca++ may be involved in the process of TPA-stimulated GH release. Tetradecanoylphorbol Acetate gonadotropin releasing hormone receptor Rattus norvegicus