PMID: 6970754Apr 1, 1981Paper

The developmental changes in plasma adrenal androgens during infancy and adrenarche are associated with changing activities of adrenal microsomal 17-hydroxylase and 17,20-desmolase

The Journal of Clinical Investigation
R J SchiebingerD L Loriaux

Abstract

The plasma concentrations of dehydroepiandrosterone, androstenedione, and dehydroepiandrosterone sulfate decrease during the first year of life, remain low during childhood, and then increase during adrenarche. To determine whether alterations in adrenal enzyme activity might explain the changing secretory pattern of the adrenal androgens, we measured human adrenal microsomal 3 beta-hydroxysteroid dehydrogenase-isomerase, 17,20-desmolase, 17-hydroxylase, and 21-hydroxylase activities. 12 adrenals from individuals aged 3 mo to 60 yr were studied. The patients were divided into three groups based upon the age of the patient when the adrenal glands were obtained: group 1, infants aged 3--8 mo (n = 3); group 2, preadrenarchal or early adrenarchal children aged 2--9 yr (n = 4); and group 3, adults aged 20--60 yr (n = 5). The mean activity of the 17,20-desmolase, 17-hydroxylase, and 21-hydroxylase fell by 50% and that of 3 beta-hydroxysteroid dehydrogenase-isomerase activity rose 80% from group 1 to 2. A fourfold increase in 17,20-desmolase (P less than 0.002) and 17-hydroxylase (P less than 0.001) activity and a doubling in 21-hydroxylase activity (P less than 0.005) occurred between groups 2 and 3. We conclude that the decline in p...Continue Reading

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