Corticosteroid response to stress depends upon increased tryptophan availability

1983 ◽  
Vol 79 (1) ◽  
pp. 79-81 ◽  
Author(s):  
Michael H. Joseph ◽  
Guy A. Kennett
Keyword(s):  
Response To Stress ◽  
Corticosteroid Response

Corticosteroid response to stress in experimental toxic hepatitis

1971 ◽  
Vol 71 (4) ◽  
pp. 367-369
Author(s):  
B. L. Lempert ◽  
M. B. Sheikman ◽  
T. S. Petrova ◽  
M. G. Zaslavskaya
Keyword(s):  
Toxic Hepatitis ◽  
Response To Stress ◽  
Experimental Toxic Hepatitis ◽  
Corticosteroid Response

Interaction of genotype and environment as determinants of corticosteroid response to stress

1970 ◽  
Vol 3 (2) ◽  
pp. 131-140 ◽  
Author(s):  
David M. Treiman ◽  
D. W. Fulker ◽  
Seymour Levine
Keyword(s):  
Response To Stress ◽  
Corticosteroid Response

scholarly journals Adrenal function evaluation in critically ill dogs with low doses of synthetic ACTH

2020 ◽  
Vol 57 (2) ◽  
pp. e167299
Author(s):  
Márcia Marques Jericó ◽  
Fernando Mathias Bento ◽  
Ricardo Duarte Silva ◽  
Felipe Braz de Siqueira Cardozo ◽  
Fabiano De Granville Ponce ◽  
...  
Keyword(s):  
Critically Ill ◽  
Adrenal Function ◽  
Stimulation Test ◽  
Function Evaluation ◽  
Low Doses ◽  
Adrenal Axis ◽  
Basal Cortisol ◽  
Response To Stress ◽  
Corticosteroid Response ◽  
Pituitary Adrenal Axis

The hypothalamus-pituitary-adrenal axis function may be impaired in patients with critical illnesses, especially cases of sepsis, named critical illness-related corticosteroid insufficiency (CIRCI). This study examined the function of the hypothalamic-pituitary-adrenal axis in normal dogs (n = 10) and dogs with critical diseases (n = 16), through determinations of endogenous ACTH (adrenocorticotropic hormone), basal cortisol and cortisol after stimulation in low doses of synthetic ACTH (1.0μg/kg/IV). The stimulation test with ACTH dose tested was verified as effective for evaluation of adrenal function in healthy and sick dogs. Ill dogs differed from healthy dogs by presenting higher basal cortisol values. Eight sick dogs presented a decrease in endogenous ACTH, basal cortisol, or Δ-cortisol. No significant differences were found between the control groups and critically ill dogs for the values of endogenous ACTH, cortisol after stimulation or Δ-cortisol. We concluded that the stimulation test with low-dose ACTH was effective for evaluation of adrenal function, as well as the fact that a considerable portion of critically ill dogs studied here, especially with sepsis, had evidence of inadequate corticosteroid response to stress. 

Plasma Corticosteroid Response to Stress in Four Species of Wild Mice1

Endocrinology ◽  
1969 ◽  
Vol 84 (3) ◽  
pp. 676-680 ◽  
Author(s):  
DAVID M. TREIMAN ◽  
SEYMOUR LEVINE
Keyword(s):  
Response To Stress ◽  
Corticosteroid Response

Aerodynamic and Acoustic Voice Measures Before and After an Acute Public Speaking Stressor

2020 ◽  
Vol 63 (10) ◽  
pp. 3311-3325
Author(s):  
Brittany L. Perrine ◽  
Ronald C. Scherer
Keyword(s):  
Fundamental Frequency ◽  
Salivary Cortisol ◽  
Public Speaking ◽  
Stress System ◽  
Before And After ◽  
Subglottal Pressure ◽  
Response To Stress ◽  
System Activation ◽  
Speaking Fundamental Frequency ◽  
Pituitary Adrenal Axis

Purpose The goal of this study was to determine if differences in stress system activation lead to changes in speaking fundamental frequency, average oral airflow, and estimated subglottal pressure before and after an acute, psychosocial stressor. Method Eighteen vocally healthy adult females experienced the Trier Social Stress Test (TSST) to activate the hypothalamic–pituitary–adrenal axis. The TSST includes public speaking and performing mental arithmetic in front of an audience. At seven time points, three before the stressor and four after the stressor, the participants produced /pa/ repetitions, read the Rainbow Passage, and provided a saliva sample. Measures included (a) salivary cortisol level, (b) oral airflow, (c) estimated subglottal pressure, and (d) speaking fundamental frequency from the second sentence of the Rainbow Passage. Results Ten of the 18 participants experienced a hypothalamic–pituitary–adrenal axis response to stress as indicated by a 2.5-nmol/L increase in salivary cortisol from before the TSST to after the TSST. Those who experienced a response to stress had a significantly higher speaking fundamental frequency before and immediately after the stressor than later after the stressor. No other variable varied significantly due to the stressor. Conclusions This study suggests that the idiosyncratic and inconsistent voice changes reported in the literature may be explained by differences in stress system activation. In addition, laryngeal aerodynamic measures appear resilient to changes due to acute stress. Further work is needed to examine the influence of other stress systems and if these findings hold for dysphonic individuals.

HYPERTROPHIC ADRENALS AND THEIR RESPONSE TO STRESS AFTER LESIONS IN THE MEDIAN EMINENCE OF TOTALLY HYPOPHYSECTOMIZED PIGEONS

1961 ◽  
Vol 37 (4) ◽  
pp. 565-576 ◽  
Author(s):  
Richard A. Miller
Keyword(s):  
Dose Response ◽  
Median Eminence ◽  
Response Curve ◽  
Liver Parenchyma ◽  
Dose Response Curve ◽  
Pars Distalis ◽  
Adrenal Enlargement ◽  
Response To Stress ◽  
Lethal Doses ◽  
Chromaffin Tissue

ABSTRACT Four per cent formaldehyde, insulin, or epinephrine in oil was injected for 5 days into pigeons subjected to varying degrees of hypophysectomy alone or together with large lesions in the median eminence and hypothalamus. Adrenals atrophied after the removal of the pars distalis alone or together with the neurohypophysis in untreated pigeons but showed markedly hypertrophic interrenal tissue (cortex in mammals) after treatment with formaldehyde or insulin. The slope of the dose-response curve was similar in operated and unoperated pigeons. The accumulation of bile in the liver parenchyma, which may occur after removal of the pars distalis, is an endogenous stress which was associated regularly with adrenal hypertrophy. After very large lesions of the median eminence and ventral hypothalamus in addition to total hypophysectomy, adrenals hypertrophied rather than atrophied, and the response to formaldehyde paralleled that in intact and »hypohysectomized« pigeons. Interrenal tissue was stimulated regularly; chromaffin tissue was partially degranulated, sometimes showed hyperplasia with colchicine, but only occasionally appeared hypertrophied. Epinephrine in nearly lethal doses caused only minimal adrenal enlargement. After adrenal denervation followed by hypophysectomy, the adrenals were still stimulated by formaldehyde. It appears that the interrenal tissue of the pigeon responds to a humoral stimulus not of hypophyseal origin in the absence of the hypophyseal-hypothalamic system.

PITUITARY AND BLOOD CORTICOTROPHIN CHANGES IN ADRENALECTOMIZED RATS MAINTAINED ON PHYSIOLOGICAL DOSES OF CORTICOSTEROIDS

1962 ◽  
Vol 39 (1) ◽  
pp. 79-86 ◽  
Author(s):  
J. R. Hodges ◽  
Joan Vernikos-Danellis
Keyword(s):  
Ascorbic Acid ◽  
Pituitary Gland ◽  
Replacement Therapy ◽  
Daily Treatment ◽  
Mild Stress ◽  
Acid Control ◽  
Small Doses ◽  
Response To Stress ◽  
Adrenalectomized Rats

ABSTRACT Pituitary and blood corticotrophin (ACTH) concentrations were estimated in adrenalectomized rats maintained on cortisol or crude adrenocortical extract (ACE) with and without ascorbic acid. Blood ACTH levels were also determined in similarly treated animals after subjection to mild stress. Thirty days after adrenalectomy there were marked rises in pituitary and blood corticotrophin concentration which were prevented by daily treatment with small doses of cortisol or ACE. In contrast to intact animals, adrenalectomized rats exhibited markedly increased adrenocorticotrophic responses to mild stress. This pituitary hyperexcitability was not diminished by replacement therapy with corticoids alone but was considerably reduced by ascorbic acid given in conjunction with ACE. It is suggested that corticoids control the rate at which ACTH is synthesised in the pituitary gland and that other factors, including ascorbic acid, control the excitability of the pituitary gland in its adrenocorticotrophic response to stress.

Sign in / Sign up

Export Citation Format

Share Document