Results 211 to 220 of about 126,611 (274)
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Elephant pituitary gonadotropins
General and Comparative Endocrinology, 1990We describe for the first time the purification and some properties of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) isolated from anterior pituitary tissue of the African elephant (Loxodonta africana). Methodology previously applied to equine and donkey pituitaries was used to obtain purified preparations of elephant LH and FSH in ...
J R, McFarlane +3 more
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Postgraduate Medicine, 1969
The methodology of gonadotropin assays has moved steadily during its 35 year evolution toward specificity and greater sensitivity. The three phases of this development are represented by the bioassay of total human pituitary gonadotropins in urine, specific bioassays for follicle-stimulating and luteinizing hormones in urine, and the radioimmunoassay ...
A, Albert, R C, Northcutt
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The methodology of gonadotropin assays has moved steadily during its 35 year evolution toward specificity and greater sensitivity. The three phases of this development are represented by the bioassay of total human pituitary gonadotropins in urine, specific bioassays for follicle-stimulating and luteinizing hormones in urine, and the radioimmunoassay ...
A, Albert, R C, Northcutt
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Pituitary Gonadotropin Responsiveness with Danazol
Fertility and Sterility, 1978Danazol (17alpha-pregn-4-en-20-yno-[2,3-d]isoxazol-17-ol) was administered daily for 4 days to castrated female rats. As previously demonstrated, danazol lowered serum levels of luteinizing hormone (LH) in an apparent dose-dependent fashion. Animals which received danazol in a dose sufficient to lower serum LH responded to administered LH-releasing ...
J M, Shane +4 more
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Molecular Biology of the Pituitary Gonadotropins
Endocrine Reviews, 1990Introduction THE pituitary gonadotropins, LH and FSH, play a central role in the mammalian reproductive process. Synthesized in the gonadotropes of the pituitary, the gonadotropins bind to receptors in the gonads leading to effects on steroidogenesis and gametogenesis (Fig. 1).
S D, Gharib +3 more
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Bioassay of Pituitary Gonadotropins
Nature, 1965DURING the course of purification of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from horse pituitary glands1 the following method was used to determine the degree of separation of FSH and LH at two purification steps. A pH-5 soluble gonadotropic fraction and a purified FSH preparation from the third zone-electrophoresis were ...
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TPOTENCY OF PITUITARY GONADOTROPINS
Endocrinology, 1940THERE ARE 5 different extracts of the anterior lobe of the pituitary in common use which are purported to contain the gonadotropic principle of that gland: prephysin (Chappel), gynantrin (G. D. Searle &Co.), gonadotropic factor (Ayerst, McKenna, and Harrison), ambinon (Roche), prepituitary-G (Italian Drugs Importing Co., Inc.) D'Amour and D'Amour1 have
Stanley F. Goldman, Bernard L. Cinberg
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EXTRACTION AND PURIFICATION OF HUMAN PITUITARY GONADOTROPIN*
The Journal of Clinical Endocrinology & Metabolism, 1958The development of methods for the extraction of gonadotropin from the urine of men and postmenopausal women by the kaolin-acetone procedure is detailed. Further purification of the crude gonadotropic material was accomplished by alcohol-salt fractionation, which results in a yield of 4 mg. of solids per liter of original urine.
A, ALBERT, S, KELLY, L, SILVER, J, KOBI
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Regulation of gonadotropin secretion in the anterior pituitary
Philosophical Transactions of the Royal Society of London. B, Biological Sciences, 1981Abstract Studies on the regulation of gonadotropin secretion in dissociated pituitary cell cultures are described. Initial studies employing a ferritin-labelled analogue of gonadotropin hormone releasing hormone (GnRH) to localize its receptor sites on the gonadotropin cell surface showed that while these receptor sites initially have
C R, Hopkins, S, Semoff, H, Gregory
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Estimation of Pituitary Gonadotropins in Human Plasma
The Journal of Clinical Endocrinology & Metabolism, 1965A rapid and simple method for estimation of gonadotropic activity in human plasma is described. The chemical procedure involves precipitation of plasma proteins with 5 ml of absolute ethanol per ml of plasma. The precipitate is then extracted twice with 2 ml of 10% ammonium acetate in 70% ethanol per ml of plasma used. Gonadotropic activity is measured
P J, KELLER, E, ROSEMBERG
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Pituitary Gonadotropin Inhibitory Activity of Danazol
Fertility and Sterility, 1974A steroid danazol (17-alpha-Pregn-4-en-20-yno(23-d)-isoxazol-17-ol) possesses a marked separation of pituitary gonadotropin inhibitory activity from overt sex hormonal activities. The effect of danazol on fertility in the rat was determined. Danazol produced a dose-related decrease in the weights of ventral prostate seminal vesicles and testes of ...
G O, Potts, A L, Beyler, H P, Schane
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