Results 161 to 170 of about 20,213 (210)

Identification and biosynthesis of steroid hormones in the gonads ofCiona intestinalis

Experientia, 1971
Da 185 g di tessuto testicolare diCiona intestinalis sono stati estratti ed identificati i seguenti ormoni steroidi: deidroepiandrosterone, cortisone e cortisolo. Nel tessuto ovarico e presente il cortisone. Incubando il tessuto testicolare con pregnenolone-7-H3 e progester-one-4-C14 sono stati isolati i seguenti metaboliti: deidroepiandrosterone ...
G, Delrio, M, d'Istria, M, Milone, G, Chieffi   +3 more
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Gonadal Steroids and Hormone Antagonists

1987
Continued investigation into the role of plasma lipoproteins in the development of atherosclerosis has led to increased interest in their interrelationships with gonadal hormones.
D. Crook, I. F. Godsland, J. C. Montgomery, V. Wynn   +3 more
openaire   +1 more source

Effects of gonadal hormones on adrenal steroid metabolism in vitro

Steroids, 1972
Abstract The effects of gonadal hormones on adrenal steroidogenesis were studied in vitro . Cholesterol side-chain cleavage activity was stimulated by orchiectomy and the effect was reversed by testosterone replacement. Neither ovariectomy nor estradiol administration affected the reaction.
H D, Colby, J I, Kitay
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Hypothalamic Imprinting by Gonadal Steroid Hormones

2002
The results of more than four decades of research on different mammalian species have established that the brain, like the rest of the reproductive system, is esentially basically female. For the male to develop structural and functional characteristics typical of his species, his brain must be exposed to testicular hormones during a critical period ...
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Thyroid Hormones, Gonadal and Adrenocortical Steroids and the Function of the Islets of Langerhans

Endocrine Reviews, 1984
Thyroid hormones, gonadal and adrenocortical steroids, are glucoregulatory hormones. Thyroid hormones increase the provision of glucose to meet the enhanced energy demands which they impose. Glucose tolerance is decreased, associated with increased hepatic glucose production, although the glucose-raising effects of thyroid hormones are partially offset
S, Lenzen, C J, Bailey
openaire   +2 more sources

Counteraction of Gonadal Steroid Inhibition of Luteinizing Hormone Release by Naloxone

Neuroendocrinology, 2008
The effect of naloxone on the negative feedback action of gonadal steroids on luteinizing hormone (LH) release was studied in castrated male and female rats. The reduction by estradiol benzoate or testosterone propionate of elevated serum LH levels in rats ovariectomized for 4 weeks was reversed by a single injection of naloxone. Injection of estradiol
D A, Van Vugt, P W, Sylvester, C F, Aylsworth, J, Meites   +3 more
openaire   +2 more sources

Influence of gonadal steroids on rat pituitary growth hormone secretion

Research in Experimental Medicine, 1990
Growth hormone (GH) secretion increases at the time of puberty, and both androgens and estrogens increase the GH response to provocative agents. Little is known, however, with regard to the mechanism or site of action of gonadal steroid-stimulated GH secretion.
K C, Copeland, M M, DeSouza, P C, Gibson
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Growth hormone, gonad development, and steroid levels in female carp

Comparative Biochemistry and Physiology Part C: Pharmacology, Toxicology and Endocrinology, 1996
The pituitary and plasma growth hormone (GH) levels of female carp (Cyprinus carpio L.) were measured in fish of various sizes and degrees of maturity, and were matched against the levels of 17 beta-estradiol (E2), testosterone (T), 17 alpha-hydroxyprogesterone (17-P), and progesterone (P) in the ovary and plasma.
G, Degani, R, Boker, K, Jackson
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Gonadal Steroid Hormone Receptors and Social Behaviors

1989
In this chapter, we shall discuss one aspect of the cellular mechanism of action of steroid hormones on social behaviors, the role of steroid hormone receptors. Unfortunately, the study of cellular mechanisms of hormones is not compatible with many social behaviors.
J. D. Blaustein, D. H. Olster
openaire   +1 more source

Interactions of gonadal steroids, gonadotropins and gonadotropin-releasing hormones in sexual maturation

Journal of Steroid Biochemistry, 1979
Abstract Plasma and pituitary concentrations of luteinizing hormone (LH) and follicle-stimulating hormone (FSH) were measured in individual male rats pretreated with testosterone and its 5α-reduced metabolites for various lengths of time at various stages of sexual maturation. The degree of androgen induced inhibition of the gonadotropins depended on
D, Gupta, M, Eichner
openaire   +2 more sources