The effect of graded exercise on the secretion of cortisol, testosterone, prolactin, growth hormone, thyroid stimulating hormone (TSH), luteinizing hormone and follicle stimulating hormone (FSH) is reported. While cortisol, prolactin, growth hormone and testosterone rise during the period of exercise, a rise in luteinizing hormone becomes evident only after rest. Levels of FSH and TSH remained ...

The within-subject and between-subject biological variation of the serum concentrations of follitropin, lutropin, sex-hormone-binding globulin, and testosterone; the ratio between the serum concentrations of testosterone and sex-hormone-binding globulin; and the concentration of testosterone in saliva have been studied in a group of 20 men during 12 months. The between-subject coefficients of v...

This study aimed to evaluate what is new in the controversial use of testosterone, as an indication pathologies such hypogonadism or its by athletes and bodybuilders search performance. Much said about subject many myths were created without any scientific foundation, one objectives monograph show that when there a precise clinical indication, testosterone necessary extremely beneficial patient...

Despite the strong interest in hormone-mediated maternal effects two key questions concerning their mechanisms are as yet unanswered: First, whether the deposition of hormones in the egg yolk is coupled with the levels of these hormones in the maternal circulation, and second, whether epigenetic changes as induced by embryonic exposure to maternal yolk hormones impinge on yolk hormone depositio...

Androgen receptor (AR) signaling is important for prostate cancer (PCa) cell proliferation. Here, we showed that proliferation of hormone-sensitive prostate cancer cells such as LNCaP was significantly enhanced by testosterone stimulation whereas hormone-insensitive prostate cancer cells such as PC3 and VCaP did not respond to testosterone stimulation. Blocking of AR using bicalutamide abolishe...

Objective Spinal cord injury (SCI) causes infertility in male patients through erectile dysfunction, ejaculatory dysfunction, semen and hormone abnormalities. Oxidative stress (OS) is involved in poor semen quality and subsequent infertility in males with SCI. The aim of this study is to examine the effects of SCI on the level of testosterone hormone. MaterialsAndMethods In this experimental st...

In men chronic heavy drinking interferes with reproductive hormones which are responsible for sexual maturation, sperm development and fertility. Alcohol is directly toxic to the testes; causing reduced testosterone levels.The present study was designed with an aim to elucidate the effect of oxidative stress on plasma testosterone level and hypothalamic pituitary gonadal (HPG) axis function in ...

many xenobiotic and natural compounds such as testosterone have been used and sometime misused to improve the growth of cattle and other livestock animals. in order to control the testosterone hormone residues in meat and to ensure the safety of iranian consumers, a monitoring system must be put in place to address the concerns. the present study was undertaken to detect and quantify the levels...

Emerging evidence links insulin resistance, a key feature in type 2 diabetes with decreased leydig cell secretion of testosterone. Low gonadal steroids, which include testosterone, dihydrotestosterone and estradiol have also been implicated with metabolic abnormalities such as hyperglycemia, hypertension and cardiovascular risk. The aim of this study was to investigate hypogonadism and its risk...

background: trifluralin is a herbicide and used in agriculture widely. it enters plants through developing roots and stops plant cells from division and elongation (meristemic inhibitor). extensive application of trifluralin to control annual grasses and broadleaf weeds in agriculture, horticulture and horn garden, leads to environmental pollution and its entrance into the food chain could have...