Journal of Clinical Endocrinology & Metabolism, Vol 46, 834-837, Copyright © 1978 by Endocrine Society

ARTICLES

Role of hCG in regulation of the fetal zone of the human fetal adrenal gland

M Seron-Ferre, CC Lawrence and RB Jaffe

It has been suggested that hCG is a trophic hormone for the fetal zone of the human fetal adrenal gland. To test this hypothesis, the isolated fetal zones of adrenals from eight fetuses (12-17-week gestation age) were superfused in the presence or absence of hCG. Dehydroepiandrosterone sulfate (DHAS) was measured in the superfusion effluent. A significant increase in DHAS production was observed in the presence of hCG. DHAS secretion decreased during the first 60 min in the control and experimental superfusions from 83 +/- 10.0 (mean +/- SE) to 71 +/- 8.0, and from 90 +/- 9.0 to 70 +/- 6.0 ng/100 mg/ml, respectively. In the presence of hCG (250 ng/ml), DHAS secretion increased significantly (P less than 0.01) over the controls to 116 +/- 12.0 at 120 min, and remained above the controls thereafter. These results support the hypothesis that hCG is one of the regulators of DHAS production by the human fetal adrenal gland early in gestation. As we found that ACTh stimulated DHAS secretion in a previous study and as there is indirect evidence for a role of ACTH in DHAS regulation late in pregnancy, these observations suggest dual regulation by hCG and ACTH early in pregnancy, and a possible transition to ACTH regulation of the fetal zone of the human fetal adrenal after midgestation.

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