scholarly journals Single exposure to social defeat or immobilization stress fails to induce lasting alterations in general anxiety and hippocampal neurogenesis in Wistar and wild-type Groningen rats

2020 ◽  
Author(s):  
Deepika Patel ◽  
Ioannis Koutlas ◽  
Sebastiaan H. de Waard ◽  
Bauke Buwalda
Keyword(s):  
Social Stress ◽  
Wistar Rats ◽  
Immobilization Stress ◽  
Strain Difference ◽  
Social Defeat ◽  
Hippocampal Neurogenesis ◽  
Coping With Stress ◽  
Social Stressors ◽  
General Anxiety ◽  
Anxiety Behavior

ABSTRACTSuppression of hippocampal neurogenesis is a readout for stress-induced alterations in neuroplasticity. In this study, we hypothesized that a single episode of severe social or non-social stress would differentially suppress neurogenesis in the dentate gyrus (DG) 10 days later in two rat strains. We anticipated that the suppression following social stress would be less severe in wildtype Groningen (WTG) rats, a rat strain considered relatively resilient to social stressors. Male Wistar and WTG were subjected to either social defeat or to immobilization stress. Behavioral response to social defeat and acute corticosterone response to both stressors was measured as well as anxiety behavior 10 days later on the elevated plus maze. Subsequently, brains were collected following cardiac aldehyde perfusion. The behavioral freezing response to defeat was much stronger in Wistar rats as compared to WTG rats. Acute corticosteroid response was similar in both strains although Wistar rats more rapidly resumed baseline values. There was no significant effect of both stressors on hippocampal DG cell proliferation and differentiation as well as on anxiety behavior. However, a striking strain difference appeared in anxiety behavior and both markers of neurogenesis. The WTG strain exhibiting much lower anxiety as well as reduced rate of hippocampal neurogenesis under all treatments. The results in this study suggest that both short-lasting acute stressors failed to induce lasting anxiety or decreased neurogenesis in the DG. Future studies could explore if and how rate of hippocampal neurogenesis is related with behavioral coping with stress.

scholarly journals Pubertal Androgens Reduce the Effects of Social Stress on Anxiety-related Behaviors in California Mice

2020 ◽  
Author(s):  
Emily C. Wright ◽  
Hannah I. Culkin ◽  
Shwetha Sekar ◽  
Amita Kapoor ◽  
Cody Corbett ◽  
...  
Keyword(s):  
Social Stress ◽  
Neural Circuits ◽  
Social Defeat ◽  
Developmental Period ◽  
Adult Males ◽  
Social Approach ◽  
Males And Females ◽  
Anxiety Behavior ◽  
California Mice ◽  
Social Vigilance

AbstractAdolescence is an important developmental period during which anxiety-related behaviors differentiate in males and females. In humans anxiety prevalence increases to a greater degree in women than men after puberty, but the mechanism is unknown. We used social defeat stress to model anxiety behaviors in California mouse, a species in which aggressive females allow for comparison of social anxiety behaviors across sex. Adult female California mice show reduced social approach and increased social vigilance after exposure to stress, while these changes are weaker in males. Here we show that in juveniles, social defeat reduces social approach and increases social vigilance in both males and females. Next, we show that prepubertal castration sensitizes adult males to social defeat. However, when pubertal castration was paired with either testosterone or dihydrostesterone replacement, effects of defeat on social approach and vigilance were blunted in adult males. We also showed that effects of defeat on social behavior in juveniles were oxytocin receptor dependent, as has been described for adult females. This work highlights the importance of pubertal testosterone to the development of sex differences in anxiety behavior, and provides evidence that androgen receptors play an important role in the development of neural circuits of anxiety.

scholarly journals Social defeat stimulates local glucocorticoid regeneration in lymphoid organs

2018 ◽  
Vol 7 (12) ◽  
pp. 1389-1396 ◽  
Author(s):  
Peter Ergang ◽  
Anna Mikulecká ◽  
Martin Vodicˇka ◽  
Karla Vagnerová ◽  
Ivan Mikšík ◽  
...  
Keyword(s):  
Hpa Axis ◽  
Social Stress ◽  
Plasma Concentrations ◽  
Social Defeat ◽  
Lymphoid Organs ◽  
Lymphoid Cells ◽  
Target Cells ◽  
Social Stressors ◽  
Glucocorticoid Metabolism ◽  
Secondary Lymphoid Organs

Stress is an important risk factors for human diseases. It activates the hypothalamic–pituitary–adrenal (HPA) axis and increases plasma glucocorticoids, which are powerful regulators of immune system. The response of the target cells to glucocorticoids depends not only on the plasma concentrations of cortisol and corticosterone but also on their local metabolism. This metabolism is catalyzed by 11β-hydroxysteroid dehydrogenases type 1 and 2, which interconvert glucocorticoid hormones cortisol and corticosterone and their 11-oxo metabolites cortisone and 11-dehydrocorticosterone. The goal of this study was to determine whether stress modulates glucocorticoid metabolism within lymphoid organs – the structures where immune cells undergo development and activation. Using the resident-intruder paradigm, we studied the effect of social stress on glucocorticoid metabolism in primary and secondary lymphoid organs of Fisher 344 (F344) and Lewis (LEW) rats, which exhibit marked differences in their HPA axis response to social stressors and inflammation. We show that repeated social defeat increased the regeneration of corticosterone from 11-dehydrocorticosterone in the thymus, spleen and mesenteric lymphatic nodes (MLN). Compared with the F344 strain, LEW rats showed higher corticosterone regeneration in splenocytes of unstressed rats and in thymic and MLN mobile cells after stress but corticosterone regeneration in the stroma of all lymphoid organs was similar in both strains. Inactivation of corticosterone to 11-dehydrocorticosterone was found only in the stroma of lymphoid organs but not in mobile lymphoid cells and was not upregulated by stress. Together, our findings demonstrate the tissue- and strain-dependent regeneration of glucocorticoids following social stress.

scholarly journals Ingestion of probiotic (Lactobacillus helveticus and Bifidobacterium longum) alters intestinal microbial structure and behavioral expression following social defeat stress

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Katherine A. Partrick ◽  
Anna M. Rosenhauer ◽  
Jérémie Auger ◽  
Amanda R. Arnold ◽  
Nicole M. Ronczkowski ◽  
...  
Keyword(s):  
Social Stress ◽  
Bifidobacterium Longum ◽  
Social Defeat ◽  
Lactobacillus Helveticus ◽  
Rrna Gene ◽  
Social Avoidance ◽  
Social Defeat Stress ◽  
Microbial Structure ◽  
Microbial Composition ◽  
Anti Inflammatory

AbstractSocial stress exacerbates anxious and depressive behaviors in humans. Similarly, anxiety- and depressive-like behaviors are triggered by social stress in a variety of non-human animals. Here, we tested whether oral administration of the putative anxiolytic probiotic strains Lactobacillus helveticus R0052 and Bifidobacterium longum R0175 reduces the striking increase in anxiety-like behavior and changes in gut microbiota observed following social defeat stress in Syrian hamsters. We administered the probiotic at two different doses for 21 days, and 16S rRNA gene amplicon sequencing revealed a shift in microbial structure following probiotic administration at both doses, independently of stress. Probiotic administration at either dose increased anti-inflammatory cytokines IL-4, IL-5, and IL-10 compared to placebo. Surprisingly, probiotic administration at the low dose, equivalent to the one used in humans, significantly increased social avoidance and decreased social interaction. This behavioral change was associated with a reduction in microbial richness in this group. Together, these results demonstrate that probiotic administration alters gut microbial composition and may promote an anti-inflammatory profile but that these changes may not promote reductions in behavioral responses to social stress.

scholarly journals Childhood Adversities and Salivary Cortisol Responses to the Trier Social Stress Test: A Systematic Review of Studies Using the Children Trauma Questionnaire (CTQ)

2020 ◽  
Vol 18 (1) ◽  
pp. 29
Author(s):  
Chuk Ling Julian Lai ◽  
Daryl Yu Heng Lee ◽  
Monique On Yee Leung
Keyword(s):  
Salivary Cortisol ◽  
Social Stress ◽  
Stress Test ◽  
Trier Social Stress Test ◽  
Future Research ◽  
Cortisol Response ◽  
Childhood Adversities ◽  
Social Stressors ◽  
Childhood Trauma Questionnaire ◽  
Cortisol Responses

Alteration in cortisol response to acute social stressors has been hypothesized to mediate childhood adversities (CA) and increased morbidity in adulthood. However, the evidence supporting an association between CA and cortisol response to social stressors is inconclusive. The present review addressed this issue by reviewing the literature on CA and cortisol response to acute social stressors, with a focus on studies with adolescents or adults, using the Childhood Trauma Questionnaire (CTQ) to assess CA, and examining salivary cortisol response to the Trier Social Stress Test (TSST). Systematic searches of relevant articles in PsycINFO, PubMed, Web of Science and ScienceDirect in February and March 2020 identified 12 articles including 1196 participants with mean ages ranging from 15.3 to 52.3 yrs. across studies. CTQ scores were significantly associated with cortisol response in 2 studies. In addition, the physical abuse and emotional neglect subscales were associated with cortisol response respectively in 2 separate studies. The lack of association between CA and cortisol response calls for more longitudinal studies, and the use of formal records of maltreatment or informant reports in future research to complement information collected by retrospective measures. In addition, increased attention to biological mechanisms other than that associated with the regulation of cortisol in explaining the connection between CA and psychiatry morbidity is warranted.

scholarly journals Adolescent male rats exposed to social defeat exhibit altered anxiety behavior and limbic monoamines as adults.

2009 ◽  
Vol 123 (3) ◽  
pp. 564-576 ◽  
Author(s):  
Michael J. Watt ◽  
Andrew R. Burke ◽  
Kenneth J. Renner ◽  
Gina L. Forster
Keyword(s):  
Social Defeat ◽  
Male Rats ◽  
Adolescent Male ◽  
Anxiety Behavior

Physiological and Biochemical Evaluation of the Effectiveness of a New Food Ingredient, a Source of Phytoecdysteroids and Flavonoids from Quinoa Grain

2021 ◽  
Vol 37 (5) ◽  
pp. 88-95
Author(s):  
N.A. Petrov ◽  
S.N. Zorin ◽  
N.A. Biryulina ◽  
V.K. Mazo
Keyword(s):  
Wistar Rats ◽  
Immobilization Stress ◽  
Field Tests ◽  
Physical Exertion ◽  
Biologically Active ◽  
Food Sources ◽  
Food Ingredient ◽  
In Vivo Evaluation ◽  
Russian Scientific

Abstract- One of the promising food sources of biologically active substances is quinoa grain, which is valued for its high content of protein, sulfur-containing amino acids, lysine, fiber, and minerals. In addition, quinoa grain can be a valuable food source of polyphenolic compounds and phytoecdysteroids. The method for production of a concentrate of flavonoids and 20-hydroxyecdysone from quinoa grains sorbed on coagulated egg protein has been developed. The in vivo evaluation of efficacy of the developed food ingredient was conducted using male Wistar rats under immobilization stress and after exhausting physical exertion. The consumption of the food ingredient prevented an increase in the level of the main stress markers, catecholamines, in animals subjected to immobilization stress. The opposite effect was observed in animals that received the food ingredient after exhausting physical exertion: their levels of catecholamines were significantly higher than in the rest comparison groups. Using the Elevated Plus Maze and Open Field tests, it was shown that the consumption of the developed concentrate neutralized the negative effect of immobilization stress and treadmill exercise on anxiety in Wistar rats. The results obtained require additional study under conditions of preventive introduction of the food ingredient into the diet of intact animals, as well as a toxicological safety assessment. Key words: quinoa, 20-hydroxyecdysone, flavonoids, stress, immobilization, exhaustive physical exercise, catecholamines, corticosterone This work was supported by the Russian Scientific Foundation, grant no. 19-16-00107.

scholarly journals Elimination of Vesicular Zinc Alters the Behavioural and Neuroanatomical Effects of Social Defeat Stress in Mice

2018 ◽  
Author(s):  
Brendan B. McAllister ◽  
David K. Wright ◽  
Ryan C. Wortman ◽  
Sandy R. Shultz ◽  
Richard H. Dyck
Keyword(s):  
Corpus Callosum ◽  
Chronic Stress ◽  
Social Defeat ◽  
Volumetric Analysis ◽  
Hippocampal Neurogenesis ◽  
Wild Type ◽  
Enhanced Sensitivity ◽  
Y Maze ◽  
Genetic Deletion ◽  
Stress Susceptibility

ABSTRACTChronic stress can have deleterious effects on mental health, increasing the risk of developing depression or anxiety. But not all individuals are equally affected by stress; some are susceptible while others are more resilient. Understanding the mechanisms that lead to these differing outcomes has been a focus of considerable research. One unexplored mechanism is vesicular zinc – zinc that is released by neurons as a neuromodulator. We examined how chronic stress, induced by repeated social defeat, affects mice that lack vesicular zinc due to genetic deletion of zinc transporter 3 (ZnT3). These mice, unlike wild type mice, did not become socially avoidant of a novel conspecific, suggesting resilience to stress. However, they showed enhanced sensitivity to the potentiating effect of stress on cued fear memory. Thus, the contribution of vesicular zinc to stress susceptibility is not straightforward. Stress also increased anxiety-like behaviour but produced no deficits in a spatial Y-maze test. We found no evidence that microglial activation or hippocampal neurogenesis accounted for the differences in behavioural outcome. Volumetric analysis revealed that ZnT3 KO mice have larger corpus callosum and parietal cortex volumes, and that corpus callosum volume was decreased by stress in ZnT3 KO, but not wild type, mice.

scholarly journals Unique effects of social defeat stress in adolescent male mice on the Netrin-1/DCC pathway, prefrontal cortex dopamine and cognition (Social stress in adolescent vs. adult male mice)

eNeuro ◽  
2021 ◽  
pp. ENEURO.0045-21.2021
Author(s):  
Philip Vassilev ◽  
Andrea Haree Pantoja-Urban ◽  
Michel Giroux ◽  
Dominique Nouel ◽  
Giovanni Hernandez ◽  
...  
Keyword(s):  
Prefrontal Cortex ◽  
Adult Male ◽  
Social Stress ◽  
Social Defeat ◽  
Adolescent Male ◽  
Male Mice ◽  
Social Defeat Stress

scholarly journals Cardioprotective Properties of Opioid Receptor Agonists in Rats With Stress-Induced Cardiac Injury

2019 ◽  
pp. 375-384
Author(s):  
E. PROKUDINA ◽  
L MASLOV ◽  
N. NARYZHNAYA ◽  
S. TSIBULNIKOV ◽  
Y. LISHMANOV ◽  
...  
Keyword(s):  
Opioid Receptor ◽  
Wistar Rats ◽  
Immobilization Stress ◽  
Cardiac Injury ◽  
Endogenous Opioids ◽  
Heart Injury ◽  
Mr 2266 ◽  
Opioid Receptor Agonists ◽  
Stimulation Of

The objectives of this study were to investigate the role of endogenous opioids in the mediation of stress-induced cardiomyopathy (SIC), and to evaluate which opioid receptors regulate heart resistance to immobilization stress. Wistar rats were subjected to 24 h immobilization stress. Stress-induced heart injury was assessed by 99mTc-pyrophosphate accumulation in the heart. The opioid receptor (OR) antagonists (naltrexone, NxMB – naltrexone methyl bromide, MR 2266, ICI 174.864) and agonists (DALDA, DAMGO, DSLET, U-50,488) were administered intraperitoneally prior to immobilization and 12 h after the start of stress. In addition, the selective µ OR agonists PL017 and DAMGO were administered intracerebroventricularly prior to stress. Finally pretreatment with guanethidine was used. Naltrexone did not alter the cardiac 99mTc-PP accumulation in stressed rats. NxMB aggravated stress-induced cardiomyopathy (P=0.005) (SIC). The selective µ OR agonist DALDA, which does not cross the blood-brain barrier, completely prevented (P=0.006) SIC. The µ OR agonist DAMGO exhibited weaker effect than DALDA. The selective δ ligand (DSLET) and κ OR ligand (U-50,488) did not alter stress-induced 99mTc-pyrophosphate accumulation in the heart. Intracerebroventricular administration of the µ OR agonists aggravated SIC. Pretreatment with guanethidine abolished this effect (P=0.01). Guanethidine alone exhibited cardioprotective properties. A stimulation of central µ OR promotes an appearance of SIC. In contrast, stimulation of peripheral µ OR contributes to an increase in cardiac tolerance to stress.

Sign in / Sign up

Export Citation Format

Share Document