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Effects of induced hypoprolactinemia on testicular function during gonadal maturation in the rat
testes androgens bromocriptine prolactin
2009/2/20
We have evaluated the effects of hypoprolactinemia during gonadal maturation in the male rat. Intact 30-day-old rats were injected daily for 10 days with three different doses of bromocriptine (0.75...
Analysis of human sperm function following exposure to the ionophore A23187. Comparison of normospermic and oligozoospermic men
A23187 sperm motility fertilization ohgozoospermia
2009/2/20
Time exposure photomicrography and interspecific in vitro fertilization techniques have been used to compare the responses to the divalent cation ionophore A23187 of spermatozoa from normal fertile an...
Physiopathologic aspects of Leydig cell function in varicocele patients
varicocele Leydig cell plasma gonadotropins
2009/2/20
Leydig cell function was studied in 108 varicocele (V) patients with a mean age of 30.9 years, and a control group (C) of 46 men with a mean age of 30 years. Plasma gonadotropin levels were determin...
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 ...
The effect of exogenous follicle stimulating hormone treatment on anterior pituitary and testicular function in the prepubertal bull
follicle stimulating hormone luteinizing hormone testosterone prepubertal bull
2009/2/20
The effect of exogenous follicle stimulating hormone (FSH) on testicular function was studied in twenty 4-month-old Holstein bulls during two seasons (ten in late winter and ten in summer). Five mg ...
Pituitary and testicular function in spontaneously hypertensive rats
Pituitary testicular function spontaneously hypertensive rats
2009/2/19
Levels of plasma gonadotropins, prolactin (PRL), and testosterone, and the testicular concentration, total content, and affinity of hCG binding sites were measured in male spontaneously hypertensi...
Effects of the Antiestrogen CI-628 on Leydig Cell Function
testis Leydig cell estrogen receptor estradiol antiestrogens
2009/2/19
The objective of this study was to use antiestrogens as probes into the relationship between 17 -estradiol, the estrogen receptor, and Leydig cell steroidogenesis. Leydig cells purified by Metriza...
Some Aspects of Pituitary Function in the Male Diabetic
pituitary function diabetes gonadotropin releasing hormone (GnRH) thyrotropin releasing hormone (TRH) growth hormone
2009/2/19
In order to elucidate the hypothalamic-pituitary function in diabetes, the pituitary responsiveness of LH, FSH, prolactin (PRL), and growth hormone (GH) to a thyrotropin releasing hormone (TRH, 200 ...
Diabetes mellitus in man is frequently associated with sexual dysfunction. It is now generally agreed that retrograde ejaculation and impotence in diabetic men are caused in the majority of cases by...
Effect of N-acetylsphingosine (C2) and the ceramidase inhibitor (1S,2R)-D-erythro-2-（N-myristoylamino）-1-phenyl-1-propanol on the regulation of Sertoli cell function
N-acetylsphingosine (C2) (1S,2R)-D-erythro-2-（N-myristoylamino）-1-phenyl-1-propanol Sertoli cell function
2009/2/18
In the present study, a possible role of ceramide in the regulation of Sertoli cell function was investigated. Intracellular ceramide levels were increased by adding N-acetylsphingosine (C2) or by i...
Extender components and surfactants affect boar sperm function and membrane behavior during cryopreservation
Extender components surfactants boar sperm function membrane behavior cryopreservation
2009/2/18
To determine how the individual components of extenders affected boar sperm function and membrane structure and to test a new surfactant's cryoprotective ability, boar sperm were cryopreserved in ...
Regulation of sperm function by protein tyrosine phosphorylation in diverse wild felid species
Cat cAMP capacitation
2009/2/18
Protein tyrosine phosphorylation is associated with sperm capacitation and the acrosome reaction in several mammalian species. Changes in phosphorylation of a 95-kDa protein in human, mouse, and d...
Effect of repeated testicular biopsy on testis function and semen quality in dogs
Sperm output sperm motility spermatogenesis
2009/2/17
The study was designed to quantitatively evaluate the effect of repeated testicular biopsy of avascular areas by the open method on spermatogenesis, semen quality, and sperm output in dogs. After a ...
Is Leydig cell steroidogenic function affected by the germ cell content of the seminiferous tubules?
Leydig cell steroidogenesis
2009/2/17
The effect of testicular germ cell content on Leydig cell steroidogenic function in vivo in adult rats was examined. Three experimental paradigms were used to effect germ cell changes. First, a vita...
Sperm function and choice of preparation media：comparison of Percoll and Accudenz discontinuous density gradients
Sperm maturity and creatine kinase motile sperm yield sperm activation chiortetracycline
2009/2/16
We compared the sperm populations prepared by Accudenz (35-65%) and Percoll (40-80%) density gradients in 21 normospermic specimens (concentration, 53.6 +/- 3.8 x 10(6) sperm/ml; motility, 44.5 +/...