Hussa RO, Story MT, Pattillo RA, Kemp RG. Effect of cyclic 3':5'-AMP derivatives prostaglandins and related agents on human chorionic gonadotropin secretion in human malignant trophoblast in culture.
IN VITRO 1977;
13:443-9. [PMID:
195896 DOI:
10.1007/bf02615105]
[Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The secretion of human chorionic gonadotropin (hCG) is stimulated by addition of N6, O2'-dibutyryl cyclic 3':5'-AMP (dbcAMP) or theophylline to normal term placenta and human malignant trophoblast cells in vitro. To understand better the specificity of this process, malignant trophoblast cultures were incubated with 3':5'-cyclic AMP (cAMP) derivatives, prostaglandins and other agents for 1 to 3 days, and the secretion of radioimmunoassayable hCG was measured. Whereas dbcAMP was the most potent agent in stimulating secretion of hCG, the N6--and O2'-monobutyryl derivatives of cAMP and phosphodiesterase inhibitors (theophylline, papaverine, 3-isobutyl-1-methylxanthine) also increased the secretion of the hormone. A slight increase in hCG secretion was observed following addition of adenine. By contrast, butyrate, cAMP, cyclic 3':5'-GMP (cGMP), dbcGMP, 5'-AMP, adenosine, L-epinephrine and prostaglandins E1, E2, F1a and F2a were ineffective. Particulate fractions from sonicates of malignant trophoblast cultures contained adenylate cyclase activity which was stimulated more than 10-fold by NaF, but not by either catecholamines or prostaglandins. The relatively specific stimulation of hCG secretion suggested that a regulatory process involving cAMP may have physiological significance in the trophoblast.
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