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Increased plasma and pituitary prolactin concentrations in adult male rats with selective elevation of FSH levels may be explained by reduced testosterone and increased estradiol production
Increased plasma pituitary prolactin concentrations adult male rats
2009/2/23
The roles of testosterone and estradiol in regulating prolactin concentrations were studied in acutely castrated adult male rats receiving subcutaneous Silastic implants of the sex steroids. Testost...
Concentrations of free testosterone, total testosterone, and androgen binding protein in the peripheral serum of male rats during sexual maturation
free testosterone total testosterone androgen binding protein peripheral serum male rats
2009/2/23
To investigate the relationship between free testosterone and sexual maturation in the male rat, animals were decapitated every 5 days from 25 through 75 days of life. Serum was assayed for androgen...
Evidence that estrogen regulation of testosterone secretion in adult rams is mediated by both indirect（gonadotropin dependent）and direct（gonadotropin independent）means
estrogen regulation testosterone secretion adult rams
2009/2/23
Involvement of endogenous estrogen in the regulation of gonadotropin and testosterone secretion was investigated in adult rams. Groups of four rams were either passively immunized against estradio...
Androgen receptor levels and androgen contents in the prostate lobes of intact and testosterone-treated Noble rats
Androgen receptor levels androgen contents prostate lobes testosterone-treated Noble rats
2009/2/23
Plasma testosterone (T) levels were correlated with androgen receptors, tissue content of T, and 5 alpha-dihydrotestosterone (DHT) in the three anatomically-discrete prostate lobes of intact and cas...
Testosterone levels after bromocriptine treatment in patients undergoing long-term hemodialysis
impotence bromocriptine hyperprolactinemia
2009/2/20
Seventeen out of 34 male patients undergoing long-term hemodialysis had increased basal plasma prolactin levels (mean = 1344 +/- 1158.76 mU/L). Seven of these 17 patients having the greatest degre...
Changes in serum levels of LH, FSH, prolactin, testosterone, and cortisol associated with season and mating in male pygmy goats
serum levels LH FSH prolactin testosterone cortisol season male pygmy goats
2009/2/20
Four male pygmy goats were used in a study designed to determine the effects of season on serum hormone (luteinizing hormone, follicle stimulating hormone, prolactin, testosterone, and cortisol) l...
Effects of electroejaculation and ketamine-HCI on serum cortisol, progesterone, and testosterone in the male cat
stress adrenal anesthesia
2009/2/20
The influence of manual restraint, ketamine-hydrochloride anesthesia and electroejaculation under anesthesia on circulating levels of cortisol, progesterone and testosterone was examined in male d...
Heterogeneity of sperm density profiles following 20-week therapy with high-dose LHRH analog plus testosterone
LHRH analog sperm density heterogeneous response
2009/2/20
Eight normal male volunteers received an LHRH analog, 100 to 500 micrograms daily, for 20 weeks. Testosterone enanthate, 100 mg, was given by injection every second week. Sperm density fell to 5.5 X...
Inhibition of 5 alpha-reductase activity and alteration of nuclear testosterone.
5a-reductase fibroblast androgen receptor enzyme inhibitor nuclear uptake
2009/2/20
17 beta-N, N-diethylcarbamoyl-4-methyl-4-aza-5 alpha-androstan-3-one (4-MA) inhibits 5 alpha-reductase activity in cultured human genital skin fibroblasts. Enzyme kinetic studies analyzed by Eadie...
Effects of an LHRH agonist analog upon sexual function in male dogs. Suppression, reversibility, and effect of testosterone replacement
LHRH agonists D-Na!(2)6-LHRH spermatogenesis
2009/2/20
Male beagle dogs were injected once daily with 10 micrograms/kg of [6-D-(2-naphthyl)alanine]-LHRH (D-Nal(2)6-LHRH), a potent LHRH agonist, for periods up to 42 days, with recovery periods up to 172 ...
Effect of gossypol on testicular testosterone production in vitro
gossypol testicular testosterone production
2009/2/19
Testicular minces were utilized to study the effect of gossypol on testosterone production. Testosterone production was assessed in both control nd gossypol treated groups after 0 to 4 hours incubat...
Combined treatment with an LHRH agonist and testosterone in man. Reversible oligozoospermia without impotence
LHRH (GnRH) testosterone spermatogenesis
2009/2/19
We have previously shown that LHRH agonist [D-Trp6,Pro9-NEt]LHRH (LHRHA) results in reversible oligozoospermia when given to normal subjects for up to ten weeks. A fall in plasma testosterone was ac...
Individual differences in LH and FSH responses to orchidectomy and testosterone replacement therapy in rams
Individual differences LH FSH rams
2009/2/19
Profiles of LH and FSH levels and pituitary LH responses to exogenous luteinizing hormone releasing hormone (LHRH) have been characterized in rams, castrated rams (wethers), and wethers implanted wi...
Suppression of the proliferative response of the seminal vesicles to testosterone by inhibitors of prostaglandin synthesis. Testosterone, indomethacin, and proliferation in seminal vesicles
seminal vesicles testosterone prostaglandin synthesis
2009/2/19
Effects of indomethacin (1.25 mg/kg) and aspirin (20 mg/kg) on testosterone-induced (0.25 mg/rat), and of indomethacin on dihydrotestosterone-induced (0.25 mg/rat) mitotic activity of the seminal ...
Teased testicular tissue with defined cell populations from experimental rats, as well as testicular tissue from normal rats, was incubated in an environment that insured the morphologic integrity o...