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Nature of alpha subunit secretion in men：circadian rhythms, pulsatile release and secretory profiles
alpha subunit secretion men circadian rhythms pulsatile release secretory profiles
2009/2/23
Alpha subunit complements LH as a marker of the activity of the hypothalamic GnRH pulse generator. To characterize episodes of alpha subunit release and to determine if a circadian pattern of alpha ...
The pattern of LH release in the adult ram influences the testicular steroidogenic response to individual LH pulses and is regulated by testosterone negative feedback
LH release adult ram influences testicular steroidogenic individual LH pulses
2009/2/23
Two experiments were conducted with adult intact rams (approximately 58 kg in body weight) in the nonbreeding season to investigate interrelationships between LH and testosterone secretion. In Exp...
Influence of photoperiod, ambient temperature and melatonin on testosterone synthesis and release during reproductive maturation in male deer mice
photoperiod ambient temperature melatonin testosterone synthesis reproductive maturation male deer mice
2009/2/23
Four experiments were designed to investigate the influence of photoperiod and other environmental factors on androgen production and reproductive maturation in deer mice. Male prairie deer mice (Pe...
Uptake and release of ascorbic acid by rat Leydig cells in vitro
ascorbic acid rat Leydig cells
2009/2/23
The mechanism by which ascorbic acid is transported into rat Leydig cells in vitro was investigated. Transport of [14C]ascorbic acid was temperature-dependent and inhibited in the absence of sodium ...
Spectrum of the pulsatile characteristics of LH release in normal men
pulsatile characteristics LH release normal men
2009/2/23
To assess the spectrum of LH pulse characteristics in normal men, blood samples from 36 individuals were drawn at 20-minute intervals for 8 hours. The subsequent immunoactive LH concentrations were ...
Differential release of polyamines by cultured rat Sertoli cells
Differential release polyamines cultured rat Sertoli cells
2009/2/23
Cellular and media concentrations of polyamines in Sertoli cell cultures were determined by fluorescent spectroscopy of dansylated compounds after separation by high-performance liquid chromatograph...
Release, extraction, and stability of hyaluronidase associated with human spermatozoa
spermatozoa hyaluronidase human cryopreservation
2009/2/20
In contrast to the rabbit: 1) no hyaluronidase could be detected in fresh or frozen human seminal plasma, all color formation on assay being due to a dialyzable, heat stable factor; 2) almost no hya...
Influence of Testicular Steroids on Thyrotropin Releasing Hormone-induced Prolactin Release in Mature Rams
testicular steroids prolactin prolactin secretion
2009/2/18
Prolactin (PRL) concentrations were measured in serum of intact rams, castrate rams, and steroid-treated castrate rams to determine whether testicular steroids influence PRL secretion in this sp...
Evidence for a role of intracellular-calcium release in nitric oxide-stimulated relaxation of the rabbit corpus cavernosum
Calcium erection thapsigargin ryanodine
2009/2/17
Erection is mediated by relaxation of the smooth muscle elements within the sinusoids of the corpus cavernosum. Although cavernosal relaxation can be mediated by a variety of mechanisms including pu...
Release of angiotensin-converting enzyme（ACE）from human spermatozoa during capacitation and acrosome reaction
ACE content ejaculate kininase II
2009/2/13
The present study examines the release of angiotensin-converting enzyme (ACE) from human spermatozoa during capacitation conditions and in correlation to acrosome reaction and cell death. The ACE ...
Pharmacokinetics and pharmacodynamics of a parenteral testosterone microsphere formulation in the male rat. Demonstration of dose dependence and controlled release
Testosterone microsphere formulation androgen delivery methods testosterone effects on LH, FSH, and accessory sex organs rat
2009/2/11
This study examined the pharmacokinetics (the time course and pattern of testosterone release) and pharmacodynamics (effects on accessory sex organ weights, and serum LH and FSH levels) of a biode...
Sialyglycoconjugates release during in vitro capacitation of human spermatozoa
human sperm capacitation glycoconjugates
2009/2/6
Modifications of the human sperm surface during incubation in capacitating conditions were studied by radiolabeling terminal sialic acid residues of cell surface glycoconjugates using the sodium met...
Testosterone release from a subcutaneous, biodegradable microcapsule formulation（Viatrel）in hypogonadal men
Hypogonadism poly-lactide-co-glycolide pharmacokinetics
2008/12/30
Men with hypogonadism require testosterone replacement for optimal health. In the United States, testosterone is currently administered by daily transdermal patches, topical gels or intramuscular in...
Role of Metastin in the Release of Gonadotropin-Releasing Hormone From the Hypothalamus of the Male Rat
Puberty sexual maturation kisspeptin
2008/12/24
Recent genetic analysis has suggested that the expression of the orphan receptor GPR54 is essential for the onset of puberty in both rodents and humans. Indirect evidence has suggested that this ...
Testosterone release from a subcutaneous, biodegradable microcapsule formulation (Viatrel) in hypogonadal men
Testosterone release subcutaneous biodegradable microcapsule formulation (Viatrel) hypogonadal men
2008/12/1
Men with hypogonadism require testosterone replacement for optimal health. In the United States, testosterone is currently administered by daily transdermal patches, topical gels or intramuscular in...