Abstract
The purpose of this study was to evaluate the increases in plasma levels of E1, E1S and E2 during constant infusion of dehydroepiandrosterone (D) in premenarchal girls (PG) and in normal menstruating women (AW). Unlabelled D was infused for 48 h in 10 premenarchal girls and in 10 normal menstruating women. Plasma levels of D, estrone (E1), estrone sulfate (E1S) and estradiol (E2) were measured before and during 48 h infusion. Metabolic clearance rates of D (MCRD), production rates of D (PRD), and increases in plasma concentration of E1 E1S and E2, relative to the corresponding increase in plasma concentration of D, were determined. The baseline plasma levels of D were found significantly lower in premenarchal girls than in normal menstruating women. MCRD was found significantly higher in premenarchal girls than in normal menstruating women (2565 ± 467 L/day versus 1317 ± 242 L/day, p < 0.01). Administration of D increased the plasma levels of E1 and E1S in the group of normal menstruating women but not in the premenarchal girls. Considering all subjects studied, the increases in plasma levels of E1 and E1S during the infusion of D were significantly correlated with body weight (p< 0.01 and p< 0.001, respectively). From these results, we conclude that in premenarchal girls there is: a) a reduced peripheral contribution of D to E1 and E1S, and/or b) a higher MCRE1 and MCRE1S than in normal menstruating women.
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Bulletti, C., Jasonni, V.M., Naldi, S. et al. Reduced conversion of dehydroepiandrosterone into estrogens in premenarchal girls. J Endocrinol Invest 9, 375–381 (1986). https://doi.org/10.1007/BF03346946
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DOI: https://doi.org/10.1007/BF03346946