testosterone/hypoxia

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Effects of hypoxia on testosterone release in rat Leydig cells.

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The aim of this study was to explore the effect and action mechanisms of intermittent hypoxia on the production of testosterone both in vivo and in vitro. Male rats were housed in a hypoxic chamber (12% O(2) + 88% N(2), 1.5 l/ml) 8 h/day for 4 days. Normoxic rats were used as control. In an in vivo

Testosterone-stimulated growth of the rat prostate may be driven by tissue hypoxia and hypoxia-inducible factor-1alpha.

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Testosterone-stimulated growth of the ventral prostate (VP) in castrated rats is preceded by angiogenesis, but the mechanisms coordinating vascular and tissue growth are unknown. Adult rats were castrated and some treated with testosterone. Tissue hypoxia was studied morphologically using the

Apocynin and raisanberine alleviate intermittent hypoxia induced abnormal StAR and 3β-HSD and low testosterone by suppressing endoplasmic reticulum stress and activated p66Shc in rat testes.

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We hypothesized that hypoxia induced testicular damage is mediated by an activated NADPH oxidase (NOX), therefore, APO (apocynin) an inhibitor of NOX and raisanberine (RS), a calcium influx inhibitor were tested if they could attenuate hypoxic toxicity to the testis. Male Sprague-Dawley rats were

Effect of testosterone and hypoxia on the expansion of umbilical cord blood CD34+ cells in vitro.

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Successfully expanding hematopoietic stem cells (HSCs) is advantageous for clinical HSC transplantation. The present study investigated the influence of testosterone on the proliferation, antigen phenotype and expression of hematopoiesis-related genes in umbilical cord blood-derived cluster of

Nocturnal Hypoxemia is Associated With Low Testosterone Levels in Overweight Males and Older Men With Normal Weight.

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OBJECTIVE The relationship among obstructive sleep apnea (OSA), body mass index (BMI), and testosterone levels has long been suggested. Obese men have shown a negative correlation between testosterone level and sleep apnea severity. Yet, little is known about the association between testosterone

Reprint of "Early testosterone modulated sex differences in behavioral outcome following neonatal hypoxia ischemia in rats".

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Hypoxia ischemia (HI; reduced blood oxygenation and/or flow to the brain) represents one of the most common injuries for both term and preterm/very low birth weight (VLBW) infants. These children experience elevated incidence of cognitive and/or sensory processing disabilities, including language

Simulation of long-haul flights in humans: prolonged mild hypoxia does not alter the circadian time structure of plasma testosterone and gonadotrophins.

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Mild hypobaric hypoxia caused by pressurisation may contribute to alter rhythmicity after long-haul flights, independently of the number of time zones crossed. In this controlled crossover study, we assessed the effects of two levels of hypoxia, equivalent to 8000 ft and 12,000 ft above sea level,

Enhancement of the breathing frequency response to hypoxia by neonatal caffeine treatment in adult male rats: the role of testosterone.

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Caffeine is a common treatment for apnea of prematurity. Although relatively safe, little is known about the potential long-term effects of this treatment on respiratory control development. We previously showed that adult male (but not female) rats previously subjected to neonatal caffeine

Comparisons of serum testosterone and corticosterone between exercise training during normoxia and hypobaric hypoxia in rats.

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The purpose of this study was to compare the effects of continuous and intermittent exercise training on serum testosterone [T] and corticosterone concentrations [Cort] during normoxia and hypobaric hypoxia. Male rats swam with loads of 3% (normoxia) or 2.25% (462 mmHg) body mass for 60 min in the

Decreased postnatal testosterone and corticosterone concentrations in rats following acute intermittent prenatal hypoxia without alterations in adult male sex behavior.

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The prenatal and postnatal testosterone surges in the male rat are associated with neurobehavioral sexual differentiation of the brain. Both surges can be attenuated by maternal stress or other environmental factors that activate the maternal and/or fetal hypothalamic/pituitary/adrenal (HPA) axis

Hypoxia reduces testosterone synthesis in mouse Leydig cells by inhibiting NRF1-activated StAR expression.

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Male fertility disorders play a key role in half of all infertility cases. Reduction in testosterone induced by hypoxia might cause diseases in reproductive system and other organs. Hypoxic exposure caused a significant decrease of NRF1. Software analysis reported that the promoter region of

Serum testosterone depression associated with hypoxia in respiratory failure.

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1. We have measured serum testosterone and arterial blood gas values in men with chronic obstructive airways disease. 2. Depression of serum testosterone concentrations was found. 3. The degree of testosterone depression was related to the severity of arterial hypoxia.

Endoplasmic reticulum stress mediating downregulated StAR and 3-beta-HSD and low plasma testosterone caused by hypoxia is attenuated by CPU86017-RS and nifedipine.

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BACKGROUND Hypoxia exposure initiates low serum testosterone levels that could be attributed to downregulated androgen biosynthesizing genes such as StAR (steroidogenic acute regulatory protein) and 3-beta-HSD (3-beta-hydroxysteroid dehydrogenase) in the testis. It was hypothesized that these

Chronic intermittent hypoxia stimulates testosterone production in rat Leydig cells.

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The hypoxia-stimulated response of the endocrine system depends on the kind and duration of hypoxia. Hypoxia has been reported to stimulate testosterone (T) production in rats, but the mechanisms remain to be investigated.

MATERIALS AND METHODS

Male

Global birth hypoxia increases the neonatal testosterone surge in the rat.

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OBJECTIVE Global birth hypoxia in rats has been shown to produce long-term changes in central nervous system functions, known to be influenced by neonatal testosterone secretion. Birth hypoxia alters levels of several circulating hormones, but it is unknown if it affects neonatal

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