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Endocrine parameters, hormone receptors, and functions of the testicular interstitium and seminiferous epithelium in estradiol-immunized Ile-de-France rams
gonadotropin secretion Leydig cells Sertoli cells FSH receptors androgen receptors
2009/2/23
The testicular response of Ile-de-France rams actively immunized against estradiol (E2) was evaluated during both the ovine nonbreeding season (spring) and breeding season (autumn). Plasma concentrati...
Pituitary-testicular reserve in men with low serum testosterone and normal serum luteinizing hormone
Pituitary-testicular reserve men with low serum testosterone normal serum luteinizing hormone
2009/2/23
Men with low serum testosterone levels who do not have elevated serum LH levels are generally thought to have hypothalamic-pituitary dysfunction. To evaluate this concept, seven men with a combinati...
Serum levels of total testosterone and sex hormone binding globulin in hypothyroid patients and normal subjects treated with incremental doses of L-T4 or L-T3
testosterone SHBG thyroid hormone hypothyroidism
2009/2/23
Plasma testosterone (T) and sex hormone binding globulin (SHBG) were assayed in normal controls (N = 9) and hypothyroid patients (N = 17) receiving increasing doses of L-T4 (0.2 mg, 0.4 mg for 30 da...
Changes in testicular morphology in boars actively immunized against gonadotropin hormone-releasing hormone
testicular morphology boars actively gonadotropin hormone-releasing hormone
2009/2/23
Alterations in testicular morphology were studied in boars actively immunized against gonadotropin hormone releasing hormone (GnRH). Ten boars were divided equally into two experimental groups (five...
Physiologic attributes of the luteinizing hormone pulse signal in the human. Cross-validation studies in men
Physiologic attributes luteinizing hormone pulse signal human
2009/2/23
The performance of two new statistically based, independently formulated, endocrine peak detection methodologies (Cluster and Detect) were tested on the same large set of physiologic LH pulsations. ...
Inhibition of ornithine decarboxylase activity by follicle stimulating hormone in primary culture of rat Sertoli cells
ornithine decarboxylase follicle stimulating
2009/2/23
The effect of follicle stimulating hormone on the activity of ornithine decarboxylase (ODC) was determined in primary culture of rat Sertoli cells. Three different FSH preparations (NIH oFSH-S-15, S...
Pituitary-testicular function of prostatic cancer patients during treatment with a gonadotropin-releasing hormone agonist analog. II. Endocrinology and histology of the testis
Pituitary-testicular function prostatic cancer patients gonadotropin-releasing hormone
2009/2/23
Endogenous testosterone (T), LH and FSH receptors, and in vitro production of cyclic adenosine-3':5'-monophosphate (cAMP), T and some of its steroid precursors were measured in testicular tissue obt...
Pituitary-testicular function of prostatic cancer patients during treatment with a gonadotropin-releasing hormone agonist analog. I. Circulating hormone levels
Pituitary-testicular function prostatic cancer patients treatment gonadotropin-releasing hormone
2009/2/23
Eight patients with advanced prostatic carcinoma (ages 59 to 78 years) were treated with a potent gonadotropin-releasing hormone (GnRH) agonist analog (buserelin, Hoechst; 600 micrograms intranasall...
Effect of gonadotropin-releasing hormone on prolactin levels in males unrelated to stress or behavioral changes
gonadotropin-releasing hormone prolactin levels males
2009/2/23
Hormone levels, physiologic parameters, electroencephalographic (EEG) activity, and changes in subjective feelings recorded using a nonverbal instrumental device were assessed following the double-b...
Appraising the instantaneous secretory rates of luteinizing hormone and testosterone in response to selective mu opiate receptor blockade in late pubertal boys
instantaneous secretory rates luteinizing hormone testosterone selective mu opiate receptor blockade late pubertal boys
2009/2/23
The pulsatile properties of gonadotropin and testosterone release were examined before and after chronic mu opiate receptor blockade with naltrexone, 50 mg every other day, in four normal boys in la...
Effect of adrenal steroids on testosterone and luteinizing hormone secretion in the ram
adrenal steroids testosterone luteinizing hormone secretion ram
2009/2/23
The effects of adrenal steroids on testosterone and LH secretion and changes in serum cortisol levels in response to treatments were studied in the ram. Acute administration of synthetic ACTH (10 mi...
Follicle stimulating hormone, luteinizing hormone and testicular Leydig cell responses to estradiol immunization in Ile-de-France rams
Follicle stimulating hormone luteinizing hormone testicular Leydig cell estradiol immunization Ile-de-France rams
2009/2/23
Active immunization of Ile-de-France rams against estradiol (E2) resulted in the production of E2-neutralizing antibodies and an elevation in the plasma concentrations of FSH, LH, and testosterone...
Mechanism of action of gonadotropin-releasing hormone-stimulated Leydig cell steroidogenesis. II. Gonadotropin-releasing hormone stimulates phospholipid labeling
gonadotropin-releasing hormone Leydig cells steroidogenesis phospholipids
2009/2/20
To investigate mechanisms responsible for gonadotropin-releasing hormone (GnRH)-stimulated Leydig cell steroidogenesis, the effects of GnRH agonist [des-Gly10, (D-Ala6) GnRH] on phospholipid turnove...
Mechanism of action of gonadotropin-releasing hormone-stimulated Leydig cell steroidogenesis
gonadotropin-releasing hormone Leydig cells testosterone cAMP cAMP-dependent protein kinase nifedipine calcium
2009/2/20
The present study was designed to elucidate mechanisms responsible for gonadotropin-releasing hormone (GnRH)-stimulated testosterone formation. Purified Leydig cells from adult Sprague-Dawley rats...
Orchiectomy in young rats results in differential regulation of follicle-stimulating hormone and luteinizing hormone content
LH FSH synthesis regulation
2009/2/20
While it is generally accepted that GnRH stimulates release of pituitary gonadotropins, it is not clear what regulates synthesis. The orchiectomized immature rat, with sustained high plasma levels o...