scholarly journals Chronic Restraint Stress Inhibits the Response to a Second Hit in Adult Male Rats: A Role for BDNF Signaling

2020 ◽  
Vol 21 (17) ◽  
pp. 6261 ◽  
Author(s):  
Paola Brivio ◽  
Giulia Sbrini ◽  
Giulia Corsini ◽  
Maria Serena Paladini ◽  
Giorgio Racagni ◽  
...  
Keyword(s):  
Adult Male ◽  
Restraint Stress ◽  
Stressful Events ◽  
Male Rats ◽  
Chronic Restraint Stress ◽  
Sprague Dawley ◽  
Second Hit ◽  
Bdnf Signaling ◽  
Intracellular Cascades ◽  
Challenging Situation

Depression is a recurrent disorder, with about 50% of patients experiencing relapse. Exposure to stressful events may have an adverse impact on the long-term course of the disorder and may alter the response to a subsequent stressor. Indeed, not all the systems impaired by stress may normalize during symptoms remission, facilitating the relapse to the pathology. Hence, we investigated the long-lasting effects of chronic restraint stress (CRS) and its influence on the modifications induced by the exposure to a second hit on brain-derived neurotrophic factor (BDNF) signaling in the prefrontal cortex (PFC). We exposed adult male Sprague Dawley rats to 4 weeks of CRS, we left them undisturbed for the subsequent 3 weeks, and then we exposed animals to one hour of acute restraint stress (ARS). We found that CRS influenced the release of corticosterone induced by ARS and inhibited the ability of ARS to activate mature BDNF, its receptor Tropomyosin receptor kinase B (TRKB), and their associated intracellular cascades: the TRKB-PI3K-AKT), the MEK-MAPK/ERK, and the Phospholipase C γ (PLCγ) pathways, positively modulated by ARS in non-stressed animals. These results suggest that CRS induces protracted and detrimental consequences that interfere with the ability of PFC to cope with a challenging situation.

Chronic restraint stress impairs endocannabinoid mediated suppression of GABAergic signaling in the hippocampus of adult male rats

2011 ◽  
Vol 85 (6) ◽  
pp. 374-379 ◽  
Author(s):  
Wen Hu ◽  
Mingyue Zhang ◽  
Boldizsár Czéh ◽  
Weiqi Zhang ◽  
Gabriele Flügge
Keyword(s):  
Adult Male ◽  
Restraint Stress ◽  
Male Rats ◽  
Chronic Restraint Stress

Effects of chronic restraint stress on social behaviors and the number of hypothalamic oxytocin neurons in male rats

Neuropeptides ◽  
2016 ◽  
Vol 60 ◽  
pp. 21-28 ◽  
Author(s):  
Jin Li ◽  
Han-Xia Li ◽  
Xiao-Jing Shou ◽  
Xin-Jie Xu ◽  
Tian-Jia Song ◽  
...  
Keyword(s):  
Restraint Stress ◽  
Social Behaviors ◽  
Male Rats ◽  
Chronic Restraint Stress

Repeated restraint stress upregulates rat sulfotransferase 1A1

2018 ◽  
Vol 30 (2) ◽  
pp. 265-273
Author(s):  
Rajiv Balyan ◽  
Ma Cai ◽  
Wenhong Zhao ◽  
Zhao Dai ◽  
Yujia Zhai ◽  
...  
Keyword(s):  
Restraint Stress ◽  
Biological Activities ◽  
Male Rats ◽  
Transcriptional Level ◽  
Sprague Dawley ◽  
Metabolizing Enzymes ◽  
Sprague Dawley Rats ◽  
Repeated Restraint Stress ◽  
Enhanced Expression ◽  
Hormone Homeostasis

Abstract BackgroundSulfotransferases (SULTs) are phase II drug-metabolizing enzymes. SULTs also regulate the biological activities of biological signaling molecules, such as various hormones, bile acids, and monoamine neurotransmitters; therefore, they play critical roles in the endocrine and nervous systems. People are subject to various kinds of physical, chemical, toxicological, physiological, and psychological stresses at one time or another. The study of the effects produced by stress may lead to finding novel remedies for many disease conditions. The effect of repeated restraint stress on rat SULT expression has not been studied. MethodsThis study involves the effect of repeated restraint stress on SULT1A1 expressions. Male Sprague-Dawley rats (n=4) were subjected to repeated restraint stress 2 h/day for 7 days. Protein and RNA expression of SULT1A1 were analyzed by western blot and quantitative real time reverse transcription polymerase chain reaction, respectively, in important tissues. ResultsWe observed that repeated restraint stress increased the expression of SULT1A1 in the liver, adrenal glands, cerebellum, hypothalamus, and cerebral cortex in male rats. Patterns of enhanced expression were observed at both mRNA and protein level, indicating that repeated restraint stress stimulates enzyme expression at the transcriptional level. ConclusionsChanges of SULT1A1 expression in important tissues caused by repeated restraint stress will have a significant effect on drug metabolism and xenobiotics detoxification. The significant changes in endocrine glands and brain sections may also cause disturbances in hormone homeostasis, therefore leading to disease conditions. This report provides clues for the understanding of the effect of stresses on health.

Effect of Melatonin on Glutamate: BDNF Signaling in the Cerebral Cortex of Polychlorinated Biphenyls (PCBs)—Exposed Adult Male Rats

2015 ◽  
Vol 40 (9) ◽  
pp. 1858-1869 ◽  
Author(s):  
S. Bavithra ◽  
E. Sugantha Priya ◽  
K. Selvakumar ◽  
G. Krishnamoorthy ◽  
J. Arunakaran
Keyword(s):  
Cerebral Cortex ◽  
Polychlorinated Biphenyls ◽  
Adult Male ◽  
Male Rats ◽  
Bdnf Signaling

scholarly journals Intraventricular T3 reverses chronic restraint stress-induced depressive-like behaviors: Inhibition of NF-κB/ NLRP3 inflammasome pathway in the hippocampus

2021 ◽  
Author(s):  
Tahmineh Mokhtari ◽  
AymanEl-Meghawry El-Kenawy ◽  
Li Hu
Keyword(s):  
Nlrp3 Inflammasome ◽  
Restraint Stress ◽  
Male Rats ◽  
Control Group ◽  
Therapeutic Effects ◽  
Chronic Restraint Stress ◽  
Model Group ◽  
Nissl Staining ◽  
Caspase 1 ◽  
Ca1 Region

Abstract In this study, the effects of triiodothyronine (T3) were evaluated on the NLR family pyrin domain containing 3 (NLRP3) inflammasome complex formation in the rat's hippocampus with restraint stress-induced depressive-like behaviors.Thirty-six Wistar male rats were randomly allocated to following groups: Control, Model, and Model + T3. In the Model or Model+T3 group, a single dose of PBS or T3 was administered into the lateral ventricle. Depressive-like behaviors were induced by chronic restraint stress. The forced swimming (FST), tail suspension (TST), and open field (OFT) tests were used to investigate the depression. The rats were sacrificed, and brain tissues were stored for molecular and pathological evaluations. Chronic stress increased the immobility of rats in the Model group according to FST, TST, and OFT (P < 0.05). T3 significantly improved depressive-like behaviors (P < 0.05). The gene expression and protein level of hippocampal nuclear factor kappa B (NF-κB), NLRP3, apoptosis-associated speck-like protein (ASC), and Caspase-1 significantly increased in the Model group compared to the control group (P < 0.05). The reduced hippocampal levels of NF-κB, NLRP3, ASC, and Caspase-1 were observed in the T3 group compared to the Model group (P < 0.05). The Nissl staining of the CA1 region showed an increased number of dark neurons (P < 0.05) and reduced pyramidal layer thickness (P < 0.05) in the Model group. These histopathological alterations were changed by T3 administration compared to the Model group (P < 0.05). The findings confirmed the therapeutic effects of intraventricularly T3 on depressive-like behaviors induced by restraint stress via surviving pyramidal neurons of the CA1 region and inhibition of NF-κB/NLRP3 inflammasome pathway.

Ultrastructure of Epidermal Cells in Prostaglandin-Treated and Wounded Rats

1975 ◽  
Vol 33 ◽  
pp. 354-355
Author(s):  
A. Lupulescu ◽  
J.E. Habowsky ◽  
J. Milkintas ◽  
D. Birmingham
Keyword(s):  
Fine Structure ◽  
Cell Differentiation ◽  
Cell Growth ◽  
Adult Male ◽  
Epidermal Cells ◽  
Biological Role ◽  
Male Rats ◽  
Sprague Dawley ◽  
Ether Anesthesia ◽  
Embryo Chick

Prostaglandins (PGE1, PGE2, and PGF2α) are hormones which exhibit a multifold effects on the fine structure of cells. Recently, there is increasing evidence that prostaglandins exert an important biological role on the structure of epidermal cells. Thus, it has been reported that PGB1, selectively affects the ultrastructure of epidermal mitochondria of embryo chick skin in culture; also accelerates the keratinization and cell differentiation. In order to study the effect of prostaglandins (PGE1, PGE2 and PGF2α) on the ultrastructure of epidermal cells, we induced wounds in rats. It is known that experimental wounds are good models for the study of cell growth and kinetics.Adult male rats (Sprague-Dawley strain) were wounded under ether anesthesia. (Two linear incisions of 2 cm long). They were divided in four groups; each of 10 rats.

Prenatal exposure to dexamethasone alters hippocampal drive on hypothalamic-pituitary-adrenal axis activity in adult male rats

2006 ◽  
Vol 290 (5) ◽  
pp. R1366-R1373 ◽  
Author(s):  
Jennifer A. Shoener ◽  
Romana Baig ◽  
Kathleen C. Page
Keyword(s):  
Hpa Axis ◽  
Adult Male ◽  
Restraint Stress ◽  
Exposed Group ◽  
Late Gestation ◽  
Male Rats ◽  
Mrna Levels ◽  
Hypothalamic Pituitary Adrenal ◽  
Hpa Axis Activity ◽  
Circulating Levels

Glucocorticoids are essential for normal hypothalamic-pituitary-adrenal (HPA) axis activity; however, recent studies warn that exposure to excess endogenous or synthetic glucocorticoid during a specific period of prenatal development adversely affects HPA axis stability. We administered dexamethasone (DEX) to pregnant rats during the last week of gestation and investigated subsequent HPA axis regulation in adult male offspring in unrestrained and restraint-stressed conditions. With the use of real-time PCR and RIA, we examined the expression of regulatory genes in the hippocampus, hypothalamus, and pituitary, including corticotropin-releasing hormone (CRH), arginine vasopressin (AVP), glucocorticoid receptors (GR), mineralcorticoid receptors (MR), and 11-β-hydroxysteroid dehydrogenase-1 (11β-HSD-1), as well as the main HPA axis hormones, adrenal corticotropic hormone (ACTH) and corticosterone (CORT). Our results demonstrate that the DEX-exposed group exhibited an overall change in the pattern of gene expression and hormone levels in the unrestrained animals. These changes included an upregulation of CRH in the hypothalamus, a downregulation of MR with a concomitant upregulation of 11β-HSD-1 in the hippocampus, and an increase in circulating levels of both ACTH and CORT relative to unrestrained control animals. Interestingly, both DEX-exposed and control rats exhibited an increase in pituitary GR mRNA levels following a 1-h recovery from restraint stress; however, the increased expression in DEX-exposed rats was significantly less and was associated with a slower return to baseline CORT compared with controls. In addition, circulating levels of ACTH and CORT as well as hypothalamic CRH and hippocampal 11β-HSD-1 expression levels were significantly higher in the DEX-exposed group compared with controls following restraint stress. Taken together, these data demonstrate that late-gestation DEX exposure in rats is associated with persistent changes in both the modulation of HPA axis activity and the HPA axis-mediated response to stress.

Sign in / Sign up

Export Citation Format

Share Document