Maternally-derived hormones in oocytes, such as glucocorticoids (GCs), play a crucial role in embryo development in oviparous taxa. In fishes, maternal stressor exposure increases circulating and egg cortisol levels, the primary GC in fishes, as well as induces oxidative stress. Elevated egg cortisol levels modify offspring traits but whether maternal oxidative stress correlates with circulatin...

Cortisol controls the body's metabolism and response to inflammation and stress. Cortisol is released in pulses from the adrenal glands in response to pulses of adrenocorticotropic hormone (ACTH) released from the anterior pituitary; in return, cortisol has a negative feedback effect on ACTH release. Modeling cortisol secretion and the interactions between ACTH and cortisol allows for quantifyi...

in teleosts the insulin-like growth factor-i, a member of igf system, play an important role in the control of growth and reproduction including metabolism, cell division, oogenesis, final oocyte maturation and secretory activity. this system is controlled by several hormones and metabolic status. serum igf-i, thyroxine (t4) and cortisol levels were studied in two female brood stocks (caught fr...

The assessment of cortisol levels in human hair has recently been suggested to provide a retrospective index of cumulative cortisol exposure over periods of up to 6 months. The current study examined the utility of hair cortisol analysis to retrospectively detect hypercortisolism during active drinking phases in alcoholics in acute withdrawal (n=23), the normalisation of cortisol output in abst...

OBJECTIVE Morning cortisol levels are frequently used as screening tests for adrenal insufficiency in both adults and children. Reports differ on the specificity of this measurement. The present study was undertaken to determine whether sex or pubertal status affected morning cortisol values. METHODS We measured morning cortisol levels and performed low-dose adrenocorticotropic hormone stimul...

Stress is a non specific response of the body ,when exposed to any demanding situation. A slight increase in cortisol levels,cortisol being the major stress hormone implicated in stress, has positive effects like increased energy, increased memory and decreased pain sensitivity.However, prolonged increase in cortisol levels can disrupt blood sugar metabolism, trigger emotional problems and elic...

Stress levels of individuals are documented using glucocorticoid concentrations (including cortisol) in blood, saliva, urine or faeces, which provide information about stress hormones during a short period of time (minutes to days). In mammals, use of hair cortisol analysis allows for the assessment of prolonged stress over weeks and months and provides information on chronic stress levels with...

Chronic stress, combined with inadequate nutrition, insufficient relaxation and lack of sleep, can lead to excess blood cortisol levels. Cortisol is a hormone secreted by the adrenal glands that mediates the body’s response to stress. Although cortisol is an essential stress-protection hormone, research has confirmed the close relationship between high cortisol levels and stress-induced obesity...

The present study was designed to examine the hypothesis that hypothalamic-pituitary-adrenal axis activity as measured by 24-h cortisol production rate (CPR) and plasma levels of free cortisol is linked to increased body fat in adults, and that increased cortisol levels with aging results from increased CPR. Fifty-four healthy men and women volunteers with a wide range of body mass indexes and ...

the purpose of this research was to compare the effect of an exhaustive exercise session on the concentration of serum testosterone and cortisol and cortisol/testosterone ratio in the morning and the evening in female volleyball players. for this purpose, 12 female volleyball players (mean age 23.26 years, mean weight 58.8 kg, mean height 166.49 cm and at least four years of activity) participa...