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Chronic restraint or variable stresses differently affect the behavior, corticosterone secretion and body weight in rats
(Elsevier B.V., 2007-01-30)
Organisms are constantly subjected to stressful stimuli that affect numerous physiological processes and activate the hypothalamo-pituitary-adrenal (HPA) axis, increasing the release of glucocorticoids. Exposure to chronic ...
Immediate and long-term effects of psychological stress during adolescence in cardiovascular function: comparison of homotypic vs heterotypic stress regimens
(2015)
Adolescence has been proposed as an ontogenic period of vulnerability to stress. Nevertheless, the impact of stressful events during adolescence in cardiovascular activity is poorly understood. Therefore, the purpose of ...
Is the Thoroughbred race-horse under chronic stress?
(1997-10-01)
Thoroughbred fillies were divided into three groups according to age: group 1, 7 fillies aged 1 to 2 years (G1) starting the training program; group 2, 9 fillies aged 2 to 3 years (G2) in a full training program; group 3, ...
Unpredictable chronic prenatal stress and manifestation of generalized anxiety and panic in rat's offspring
(2018-07-13)
Often the manifestation of anxiety cannot be explained by known environmental or hereditary factors. With this perspective, it has been reported that prenatal stress may lead to emotional disturbances in the offspring. ...
Influence of pre-existing hypertension on neuroendocrine and cardiovascular changes evoked by chronic stress in female rats
(2018-11-01)
This study investigated neuroendocrine, autonomic, and cardiovascular changes evoked by daily exposure to the same type of stressor (homotypic) or different aversive stressor stimuli (heterotypic) in 60-days-old female ...
The AT1 receptor antagonist losartan does not affect depressive-like state and memory impairment evoked by chronic stressors in rats
(2019-01-01)
The present study investigated the effect of the treatment with the angiotensin II type 1 receptor (AT1) antagonist losartan in the depressive-like state and memory impairment evoked by exposure to either homotypic (i.e., ...
Chronic social stress in rainbow trout: Does it promote physiological habituation?
(Academic Press Inc. Elsevier B.V., 2008-01-01)
The effect of chronic social stress on growth, energetic substrates and hormones was tested in rainbow trout, Oncorhynchus mykiss. After a 14-day isolation period, the fish were paired for 8 days. In order to expose fish ...
Behavioral and neuroendocrine effects of the exposure to chronic restraint or variable stress in early adolescent rats
(Pergamon-Elsevier B.V. Ltd, 2012-02-01)
Stress events during adolescence may contribute to the expression or exacerbation of physical and behavioral disorders. However, little attention has been given to the physiological and behavioral changes promoted by stress ...
Decreased endothelium-dependent vasoconstriction to noradrenaline in acute-stressed rats is potentiated by previous chronic stress: Nitric oxide involvement
(Elsevier B.V., 1998-01-01)
1. The objective was to determine whether nitric oxide participates in stress adaptive responses. Acute stress (AS) decreased endothelium-dependent vasoconstriction to noradrenaline (NA) in rat aorta [control rat (CR) ...
Propolis immunomodulatory activity on TLR-2 and TLR-4 expression by chronically stressed mice
(Taylor & Francis Ltd, 2012-01-01)
Our group has been investigating the immunomodulatory activity of propolis in stressed mice. In this work, we wish to report the action of propolis in chronically stressed mice, assessing the Toll-like receptor (TLR2 and ...