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Effect of immobilization stress on testosterone and inhibin in male rats
immobilization stress testosterone inhibin male rats
2009/2/23
Adult male Wistar rats were subjected to acute and chronic immobilization stress. Changes in plasma levels of LH, FSH and testosterone and in the content of testicular inhibin and testosterone wer...
The changing profiles of L-ornithine decarboxylase and S-adenosyl-L-methionine decarboxylase activities in testicular cell types during sexual maturation of male rats
L-ornithine decarboxylase S-adenosyl-L-methionine testicular cell types
2009/2/23
To understand the involvement of polyamines in testicular maturation and spermatogenesis, the activity of two enzymes involved in the polyamine synthetic pathway, L-ornithine decarboxylase (ODC) a...
Effects of cocaine hydrochloride on reproductive function and sexual behavior of male rats and on the behavior of their offspring
cocaine hydrochloride reproductive function sexual behavior male rats offspring
2009/2/23
Cocaine hydrochloride (30, 15, or 0 mg/kg) was administered daily subcutaneously to male rats for a minimum of 72 days. Animals receiving the 15-mg/kg and 0-mg/kg doses were pair-fed with animals re...
Pituitary-gonadal function in adult male rats subjected to chronic water restriction
water restriction protein-calorie deficit circadian rhythms FSH LH testosterone acute stress
2009/2/23
The effect of water restriction on the pituitary-gonadal axis has been studied in adult male rats. Water restriction did not modify FSH, LH and testosterone levels. However, both LH and testosterone...
Altered testosterone feedback in pubertal male rats raised on reduced caloric intake
diet feedback FSH gonadotropins LH male nutrition
2009/2/23
A study was conducted to explore the hypothesis that reduced caloric intake increases the negative feedback efficacy of testosterone on gonadotropin secretion. Daily subcutaneous injections of testost...
Lack of correlation between fertility and sperm numbers in male rats treated with histrelin, a potent LHRH agonist
correlation fertility sperm numbers male rats histrelin potent LHRH agonist
2009/2/23
Adult male rats were treated daily for up to 8 weeks with histrelin, [(ImBzl)-D-His6, Pro9-NEt]LHRH, to study the antifertility effects of this LHRH agonist. Although serum testosterone concentratio...
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...
Prolonged suppression of plasma LH levels in male rats after a single injection of an LH-RH agonist in poly（DL-lactide-co-glycolide）microcapsules
LH-RH agonist biodegradable microcapsules LH PRL rats
2009/2/20
The authors have examined the effects of a subcutaneous injection of the LH-RH agonist D-Trp6-LH-RH formulated in biodegradable poly(DL-lactide-co-glycolide) microcapsules on plasma levels of D-Tr...
Growth and reproductive adaptation in male rats with chronic protein deficiency
protein deficiency undernutrition testicular
2009/2/20
In previous studies, male rats fed a low-protein diet beginning at weaning were found to have impaired sexual development through age 11 weeks when compared to food-restricted, weight-matched contro...
Inability of continuous long-term administration of D-Nal（2）6-LHRH to abolish fertility in male rats
D-Nal(2)6-LHRH fertility male rats
2009/2/19
A highly potent agonist of LHRH, [6-D-(2-naphthyl)-alanine]-LHRH, was administered chronically for 12 weeks to adult male rats by repetitive implantation of pellets, and its effects upon mating, fer...
Estrogens and cytosolic estrogen receptors in aged male rats
Estrogens cytosolic estrogen receptors aged male rats
2009/2/19
To determine whether estrogens may play a role in the decline in Leydig cell function in aged rats, plasma levels of testosterone, estradiol, and estrone; intratesticular concentrations of testoster...
The Effect of Acute and Chronic Ethanol Administration on Prolactin Secretion in Male Rats
ethanol prolactin glutamate decarboxylase
2009/2/19
The effect of acute and chronic administration of ethanol on prolactin secretion in male rats was investigated under basal conditions and after the administration of sulpiride. The effect of ethan...
Temporal Dissociation of Feedback and Direct Testicular Effects of Estradiol Benzoate in Male Rats
estradiol negative feedback direct testicular effects testicular incubations
2009/2/19
Studies were conducted to characterize the responses of the hypothalamic-pituitary-testicular axis to systemic injection of estradiol benzoate (EB) in the rat. Feedback effects of estrogens on the...
Effects of Prolactin on Prostate Androgen Receptors in Male Rats
prolactin prostate androgen receptors immature male rats
2009/2/19
Five groups of immature (30-day-old) intact male rats were injected daily for ten days with different doses of ovine prolactin (5, 10, 25, 50, or 500 µg per rat per day). At the end of the t...