Title : Insulin enhances luteinizing hormone-stimulated steroidogenesis by porcine theca cells.

Pub. Date : 1989 Apr

PMID : 2473786






5 Functional Relationships(s)
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1 Theca cells were obtained from prepubertal gilts and cultured under serum-free conditions for 48 h. Theca cell androstenedione production under basal and luteinizing hormone (LH)-stimulated conditions was significantly increased by adding insulin (1 microgram/ml) to the culture medium. Androstenedione insulin Homo sapiens
2 Treatment of basal and LH-stimulated cultures with increasing concentrations of insulin (0.001-10 micrograms/ml) caused dose- and time-dependent increments in androstenedione production, but the effect was independent of the dose of LH employed. Androstenedione insulin Homo sapiens
3 The ability of insulin to enhance thecal cell androstenedione production was mimicked by somatomedin C, but not by relaxin. Androstenedione insulin Homo sapiens
4 Insulin treatment also caused dose-dependent increments in forskolin- and prostaglandin E2-stimulated accumulation of extracellular cAMP and androstenedione. Androstenedione insulin Homo sapiens
5 Insulin also increased both the basal and LH-stimulated production of progesterone and its precursor pregnenolone, in addition to the increases in androstenedione. Androstenedione insulin Homo sapiens