Estrone Sulfate: Production Rate and Metabolism in Man
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چکیده
منابع مشابه
Estrone sulfate: production rate and metabolism in man.
Since estrone sulfate (E(1)S) is present at high concentration in plasma, we have examined the parameters of the plasma estrone, estradiol, E(1)S system. The metabolic clearance rate of E(1)S was 157 liter/day (range 70-292) in men and women. Estimated plasma production rates of E(1)S were (mugrams per day): men, 77; women, early follicular phase, 95; women, early luteal phase, 182. The convers...
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The aim of the present research was to study the uptake of DHEAS, and to establish the intracrine capacity of human platelets to produce sex steroid hormones. The DHEAS transport was evaluated through the uptake of [(3)H]-DHEAS in the presence or absence of different substrates through the organic anion transporting polypeptide (OATP) family. The activity of sulfatase enzyme was evaluated, and ...
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The metabolic activities and tissue binding of estrone (E1) and estrone sulfate (E1S) on futile cycling were examined. Desulfation of E1S in the 9000g supernatant fraction (S9) of periportal (PP) and perivenous (PV) rat hepatocytes were of similar V (2.9 +/- 1.0 and 2.4 +/- 0.9 nmol/min/mg of S9 protein), K (30.4 +/- 8.3 and 34.8 +/- 6.6 microM), and desulfation intrinsic clearances (V/K of 77 ...
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The activity of the two membrane-bound sulfatases, estrone and dehydroepiandrosterone sulfatases, are reported in human breast carcinoma tissues. In 21 tested tumors (12 from post-menopausal women and 9 from nonmenopausal women), the two sulfatases were consistently present. The apparent Km values for estrone and dehydroepiandrosterone sulfatases were, respectively, 6.8 and 14.9 microM. In term...
متن کاملThe metabolism of S35-sodium estrone sulfate in the adult female rat.
In general it is considered that conjugated estrogens are less active in vivo than the free form (1). This fact is attributed generally to the slow rate of hydrolysis of the conjugated form in the body or to an increased rate of excretion; however, it was shown recently (2) that pregnant and non-pregnant rats given S35-sodium estrone sulfate by subcutaneous injection rapidly excrete S35 as inor...
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ژورنال
عنوان ژورنال: Journal of Clinical Investigation
سال: 1972
ISSN: 0021-9738
DOI: 10.1172/jci106862