Results 231 to 240 of about 42,461 (288)

Gonadal Steroid Hormones and Hypothalamic Opioid Circuitry

Hormones and Behavior, 1994
Endogenous opioid peptides derived from several gene families are localized within hypothalamic regions known to be involved in the regulation of reproduction. For example, the proenkephalin gene products, met- and leu-enkephalin, and the proopiomelanocortin (POMC) gene product, beta-endorphin, are found in the rat medial preoptic area (MPOA). Moreover,
R P, Hammer, L, Zhou, S, Cheung
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Regulation of Growth Hormone Action by Gonadal Steroids

Endocrinology and Metabolism Clinics of North America, 2007
Sex steroids modulate growth hormone (GH) secretion and action. Estrogen attenuates GH action in a dose- and route-dependent manner by inhibiting GH-regulated endocrine function of the liver. Testosterone amplifies the metabolic action of GH while exhibiting similar but independent effects of its own. The strong modulatory effect of gonadal steroids on
Udo J, Meinhardt, Ken K Y, Ho
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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
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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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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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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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Episodic Growth Hormone Secretory Pattern in Male Rats: Relationship to Gonadal Steroid Hormones

Journal of Veterinary Medicine Series A, 1989
SummaryIn the present study sequential blood samples were obtained from freely‐behaving male rats bearing chronic intracardial venous cannulae. Blood samples were obtained at 20 min intervals for 6 h from intact rats, castrated rats, castrated rats treated with either testosterone propionate (TP) or estradiol benzoate (EB) and intact rats treated with ...
H H, Ahmed, M, Fayez, J, Meites
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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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