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chronic mild stress

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https://www.readbyqxmd.com/read/29166674/unpredictable-chronic-mild-stress-differentially-impairs-social-and-contextual-discrimination-learning-in-two-inbred-mouse-strains
#1
Michiel van Boxelaere, Jason Clements, Patrick Callaerts, Rudi D'Hooge, Zsuzsanna Callaerts-Vegh
Alterations in the social and cognitive domain are considered important indicators for increased disability in many stress-related disorders. Similar impairments have been observed in rodents chronically exposed to stress, mimicking potential endophenotypes of stress-related psychopathologies such as major depression disorder (MDD), anxiety, conduct disorder, and posttraumatic stress disorder (PTSD). Data from numerous studies suggest that deficient plasticity mechanisms in hippocampus (HC) and prefrontal cortex (PFC) might underlie these social and cognitive deficits...
2017: PloS One
https://www.readbyqxmd.com/read/29163969/ercp-in-infants-children-and-adolescents-is-feasible-and-safe-results-from-a-tertiary-care-center
#2
Jasmin Felux, Ekkehard Sturm, Andreas Busch, Emanuel Zerabruck, Florian Graepler, Dietmar Stüker, Andreas Manger, Hans-Joachim Kirschner, Gunnar Blumenstock, Nisar P Malek, Martin Goetz
Background: Indications for endoscopic retrograde cholangiopancreatography (ERCP) in children differ from adults. Paucity of data and concerns about potential lower effectiveness and more side effects limit its use even in high volume centers. We retrospectively analyzed indications, success rates, limitations, and side effects of ERCPs in children <18 years. Methods: From January 2012 to March 2015, 54 ERCPs were performed in 31 children (median age 11 (0-17) years; median weight 22 (3...
November 2017: United European Gastroenterology Journal
https://www.readbyqxmd.com/read/29151193/disturbances-of-diurnal-phase-markers-behavior-and-clock-genes-in-a-rat-model-of-depression-modulatory-effects-of-agomelatine-treatment
#3
K Højgaard, S L Christiansen, E V Bouzinova, O Wiborg
Major depressive disorder (MDD) is a growing problem worldwide. Though, the etiology remains unresolved, circadian rhythm disturbances are frequently observed in MDD and thus is speculated to play a key role herein. The present study focuses on circadian rhythm disturbances in the chronic mild stress (CMS) animal model of depression and examined whether the atypical antidepressant, agomelatine, which is mediating its action via melatonergic and serotonergic receptors, is capable of resynchronizing the perturbed rhythm...
November 19, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/29141007/escitalopram-and-nht-normalized-stress-induced-anhedonia-and-molecular-neuroadaptations-in-a-mouse-model-of-depression
#4
Or Burstein, Motty Franko, Eyal Gale, Assaf Handelsman, Segev Barak, Shai Motsan, Alon Shamir, Roni Toledano, Omri Simhon, Yafit Hirshler, Gang Chen, Ravid Doron
Anhedonia is defined as a diminished ability to obtain pleasure from otherwise positive stimuli. Anxiety and mood disorders have been previously associated with dysregulation of the reward system, with anhedonia as a core element of major depressive disorder (MDD). The aim of the present study was to investigate whether stress-induced anhedonia could be prevented by treatments with escitalopram or novel herbal treatment (NHT) in an animal model of depression. Unpredictable chronic mild stress (UCMS) was administered for 4 weeks on ICR outbred mice...
2017: PloS One
https://www.readbyqxmd.com/read/29138567/resveratrol-ameliorates-chronic-unpredictable-mild-stress-induced-depression-like-behavior-involvement-of-the-hpa-axis-inflammatory-markers-bdnf-and-wnt-%C3%AE-catenin-pathway-in-rats
#5
Xin-Hua Yang, Su-Qi Song, Yun Xu
Classic antidepressant drugs are modestly effective across the population and most are associated with intolerable side effects. Recently, numerous lines of evidence suggest that resveratrol (RES), a natural polyphenol, possesses beneficial therapeutic activity for depression. The aim of the present study was to explore whether RES exhibits an antidepressant-like effect in a depression model and to explore the possible mechanism. A depression model was established via chronic unpredictable mild stress (CUMS), after which the model rats in the RES and fluoxetine groups received a daily injection of RES or fluoxetine, respectively...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/29129610/the-effect-of-rat-strain-and-stress-exposure-on-performance-in-touchscreen-tasks
#6
Lena-Sophie Martis, Simone Krog, Thao Phuong Tran, Elena Bouzinova, Sofie L Christiansen, Arne Møller, Megan C Holmes, Ove Wiborg
Patients suffering from depression-associated cognitive impairments often recover incompletely after remission from the core symptoms of depression (lack of energy, depressed mood and anhedonia). This study aimed to set the basis for clinically relevant testing of cognitive impairments in a preclinical model of depression. Hence, we used the chronic mild stress (CMS) model of depression, which provokes the core symptom of anhedonia in a fraction of the stress exposed animals, while others remain resilient, and assessed the entire CMS groups' cognitive performance on the touchscreen operant platform...
November 10, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/29127070/an-early-experience-of-mild-adversity-involving-temporary-denial-of-maternal-contact-affects-the-serotonergic-system-of-adult-male-rats-and-leads-to-a-depressive-like-phenotype-and-inability-to-adapt-to-a-chronic-social-stress
#7
Anastasia Diamantopoulou, Theodora Kalpachidou, Georgios Aspiotis, Ioannis Gampierakis, Fotini Stylianopoulou, Antonios Stamatakis
Adverse early life experiences can affect adaptability to chronic stressors and lead to depressive-like behaviors in animal models. We employed an early experience model in which rat pups during postnatal days 10-13 are exposed to a T-maze in which they learn the location of their mother motivated by the rewarding stimulus of maternal contact; one group of rats receives the expected reward, by being allowed contact with the mother upon finding her, while the other group is temporarily denied this contact (Denied Expected Reward, DER), thus experiencing mild adversity...
November 7, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/29126094/evolutionarily-adapted-hormesis-inducing-stressors-can-be-a-practical-solution-to-mitigate-harmful-effects-of-chronic-exposure-to-low-dose-chemical-mixtures
#8
REVIEW
Se-A Kim, Yu-Mi Lee, Je-Yong Choi, David R Jacobs, Duk-Hee Lee
Although the toxicity of synthetic chemicals at high doses is well known, chronic exposure to low-dose chemical mixtures has only recently been linked to many age-related diseases. However, it is nearly impossible to avoid the exposure to these low-dose chemical mixtures as humans are exposed to a myriad of synthetic chemicals as a part of their daily lives. Therefore, coping with possible harms due to low dose chemical mixtures is challenging. Interestingly, within the range of environmental exposure, disease risk does not increase linearly with increasing dose of chemicals, but often tends to plateau or even decrease with increasing dose...
November 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29115597/quantitative-proteomic-study-of-the-plasma-reveals-acute-phase-response-and-lxr-rxr-and-fxr-rxr-activation-in-the-chronic-unpredictable-mild-stress-mouse-model-of-depression
#9
Chuangchuang Yang, Chanjuan Zhou, Jie Li, Zhi Chen, Haiyang Shi, Wensong Yang, Yinhua Qin, Lin Lü, Libo Zhao, Liang Fang, Haiyang Wang, Zicheng Hu, Peng Xie
Major depressive disorder is a severe neuropsychiatric disease that negatively impacts the quality of life of a large portion of the population. However, the molecular mechanisms underlying depression are still unclear. The pathogenesis of depression involves several brain regions. However, most previous studies have focused only on one specific brain region. Plasma and brain tissues exchange numerous components through the blood‑brain barrier. Therefore, in the present study, plasma samples from control (CON) mice and mice subjected to chronic unpredictable mild stress (CUMS) were used to investigate the molecular pathogenesis of depression, and the association between the peripheral circulation and the central nervous system...
October 20, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29108796/multifunctional-neuroprotective-effect-of-withanone-a-compound-from-withania-somnifera-roots-in-alleviating-cognitive-dysfunction
#10
Anjali Pandey, Sarang Bani, Prabhu Dutt, Naresh Kumar Satti, Krishan Avtar Suri, Ghulam Nabi Qazi
Alzheimer's disease (AD) is a chronic disorder that slowly worsens and impairs the person's memory, learning, reasoning, judgment, communication and familiar tasks with loss of orientation. AD is characterized clinically by cognitive deficit and pathologically by the deposition of β amyloid plaques, neurofibrillary tangles, associated with degeneration of the cholinergic forebrain. Withanone (WS-2), a compound isolated from root extract of Withania somnifera at doses administered orally/day to wistar rats for duration of 21 days showed significant improvement in the cognitive skill by inhibiting amyloid β-42 and attenuated the elevated levels of pro-inflammatory cytokines like TNF alpha, IL-1 beta, IL-6, MCP-1, Nitric oxide, lipid peroxidation and both β- and γ- secretase enzymatic activity...
November 3, 2017: Cytokine
https://www.readbyqxmd.com/read/29105627/macrophage-related-cytokine-expressions-in-depression-mouse-model-induced-by-chronic-unpredictable-mild-stress
#11
Shoulian Zhu, Lejing Li, Ying Li, Wenyuan Cao
Depression is characterized by mental retardation, interest blank, hypoactivity, anxiety, appetite loss, sexual dysfunction, sleep disorders and other symptoms. The incidence of depressed patients has demonstrated an upward trend in recent years. Antidepressant drugs are commonly used in modern medicine, but they have the side effect of drug resistance. This study aims to explore the effect of acupuncture stimulation on expressions of macrophage-related cytokines in mice with depression induced by chronic unpredictable mild stress (CUMS), and to explore the underlying immunological mechanism...
September 2017: Pakistan Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29105467/-effect-of-electroacupuncture-at-zusanli-st-36-on-vimentin-a-kind-of-cytoskeleton-protein-related-to-smooth-muscle-contraction-in-rats-with-diarrhea-predominant-irritable-bowel-syndrome
#12
Da-Ye Yang, Hua Wang, Jia Li, Song Wu, Jian-Min Liu, Dan Wang, Li-Hua Wang
OBJECTIVE: To investigate the effect of electroacupuncture (EA) at "Zusanli" (ST 36) on cytoskeleton protein-Vimentin (related to smooth muscle contraction) in rats with diarrhea-predominant irritable bowel syndrome (IBS-D). METHODS: Sixty female Sprague-Dawley (SD) rats were randomly divided into normal, model, EA and pinaverium bromide (PB) groups (n=15/group). The IBS-D model was established by the method of high lactose feeding and chronic unpredictable mild stress...
October 25, 2017: Zhen Ci Yan Jiu, Acupuncture Research
https://www.readbyqxmd.com/read/29093569/implications-of-mitochondrial-network-organization-in-mitochondrial-stress-signalling-in-narp-cybrid-and-rho0-cells
#13
Jarosław Walczak, Małgorzata Partyka, Jerzy Duszyński, Joanna Szczepanowska
Mitochondrial dysfunctions lead to the generation of signalling mediators that influence the fate of that organelle. Mitochondrial dynamics and their positioning within the cell are important elements of mitochondria-nucleus communication. The aim of this project was to examine whether mitochondrial shape, distribution and fusion/fission proteins are involved in the mitochondrial stress response in a cellular model subjected to specifically designed chronic mitochondrial stress: WT human osteosarcoma cells as controls, NARP cybrid cells as mild chronic stress and Rho0 as severe chronic stress...
November 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29084098/psychological-predictors-of-postconcussive-symptoms-following-traumatic-injury
#14
Karen A Sullivan, Shannon L Edmed, Jaimi H Greenslade, Melanie White, Kevin Chu, Bill Lukin, Rael T Lange, Janine K Lurie
OBJECTIVE: To determine the contribution of demographics, injury type, pain, and psychological factors on postconcussive symptoms. SETTING AND PARTICIPANTS: Recently injured (n = 54) and noninjured (n = 184) adults were recruited from a hospital emergency department or the community. Thirty-eight individuals met the diagnostic criteria for a mild traumatic brain injury and 16 individuals received treatment for a minor traumatic non-brain injury. MAIN MEASURES: Standardized tests were administered to assess 4 postconcussion symptom types and theorized predictors including a "physiogenic" variable (injury type) and "psychogenic" variables (symptoms of anxiety, depression, and stress) within 1 month of the injury...
October 27, 2017: Journal of Head Trauma Rehabilitation
https://www.readbyqxmd.com/read/29076919/bdnf-mediated-projection-specific-regulation-of-depressive-like-and-nociceptive-behaviors-in-mesolimbic-reward-circuitry
#15
Di Liu, Qian-Qian Tang, Cui Yin, Yu Song, Yan Liu, Jun-Xia Yang, He Liu, Yue- Man Zhang, Si-Yin Wu, Ying Song, Barbara Juarez, Hai-Lei Ding, Ming-Hu Han, Hongxing Zhang, Jun-Li Cao
Increasing evidence suggests that mesolimbic reward system plays critical roles in the regulation of depression and nociception; however, its circuitry and cellular mechanisms remain unclear. In this study, we investigated the output-specific regulatory roles of dopaminergic (DA) neurons within the ventral tegmental area (VTA) in depressive-like and nociceptive behaviors in mice subjected to chronic unpredictable mild stress (CMS), using the projection-specific electrophysiological recording, pharmacological manipulation, behavioral test, and molecular biology technologies...
October 13, 2017: Pain
https://www.readbyqxmd.com/read/29073563/effect-of-chronic-stress-on-capsaicin-induced-dental-nociception-in-a-model-of-pulpitis-in-rats
#16
Maryam Raoof, Ehsan Ashrafganjoui, Razieh Kooshki, Mehdi Abbasnejad, Jahangir Haghani, Sara Amanpour, Mohammad-Reza Zarei
OBJECTIVE: Chronic stress can alter nociceptive sensitivity. However, the effect of stress exposure on dental nociception has been less addressed. Therefore, the present study investigated the effects of chronic exposures to some social and psychological stresses on pulpal nociceptive responses. DESIGN: The stress groups were constructed as follows: forced swimming (n=6), restraint (n=6), and mild (n=10) and severe (n=15) crowding stresses. Rats were subjected to stress for 1h per day for a week...
October 18, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/29071896/-effect-of-manual-acupuncture-intervention-on-levels-of-5-htt-5-ht1ar-ne%C3%AE-2r-of-brain-tissues-in-rats-with-post-stroke-depression
#17
Wei Xiao, Xian-Bao Zhang, Zhen Wang, Yan Wang, Xiao-Li Guo, Ling He, Fa-Jun Liang, Hui-Xing Hu
OBJECTIVE: To observe the effect of manual acupuncture intervention on serotonin transporter (5-HTT), 5-HT 1 A receptor (5-HT1AR), norepinephrine (NE) alpha receptor 2 (NEα2R) protein of brain tissues in rats with post-stroke depression (PSD). METHODS: Forty SD rats were randomly divided into normal group, model group, medication group and acupuncture group, with 10 rats in each. The PSD model was established by the combination of middle cerebral artery occlusion and chronic non- predictable mild stress...
December 25, 2016: Zhen Ci Yan Jiu, Acupuncture Research
https://www.readbyqxmd.com/read/29070884/telmisartan-activates-ppar%C3%AE-to-improve-symptoms-of-unpredictable-chronic-mild-stress-induced-depression-in-mice
#18
Yingxiao Li, Kai-Chun Cheng, Keng-Fan Liu, Wen-Huang Peng, Juei-Tang Cheng, Ho-Shan Niu
Major depression is a common mental disorder that has been established to be associated with a decrease in serotonin and/or serotonin transporters in the brain. Peroxisome proliferator-activated receptor δ (PPARδ) has been introduced as a potential target for depression treatment. Telmisartan was recently shown to activate PPARδ expression; therefore, the effectiveness of telmisartan in treating depression was investigated. In unpredictable chronic mild stress (UCMS) model, treatment with telmisartan for five weeks notably decrease in the time spent in the central and the reduced frequency of grooming and rearing in open filed test (OFT) and the decreased sucrose consumption in sucrose preference test (SPT) compared with the paradigms...
October 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29064798/anhedonia-at-experimental-models-of-chronic-stress-and-its-correction
#19
Ruslan V Lutsenko, Antonina H Sydorenko, Viktor M Bobyriov
INTRODUCTION: Different types of chronic stress lead to neurotic and depressive disorders. Key symptoms of these disorders are anhedonia and correction of which will indicate the efficacy of proposed therapy. The aim of the paper is to investigate the influence of amide 2-hydroxy-N-naftalen-1-il-2-(2-oxo-1,2-dihidro-indole-3-iliden) and ethyl ether 4-[2-hydroxy-2-(2-oxo-1,2-dihidro-indole-3-iliden)-acetamin]-butyric acid on anhedonia after the experimental neurosis and chronic moderate stress in rats...
2017: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29058041/dihydromyricetin-exerts-a-rapid-antidepressant-like-effect-in-association-with-enhancement-of-bdnf-expression-and-inhibition-of-neuroinflammation
#20
Zhaoxiang Ren, Pengju Yan, Liushuai Zhu, Huicui Yang, Yafei Zhao, Brian P Kirby, John L Waddington, Xuechu Zhen
RATIONALE: Major depressive disorder (MDD) is a highly prevalent illness that affects large populations across the world, and increasing evidence suggests that neuroinflammation and levels of brain-derived neurotrophic factor (BDNF) are closely related to depression. Dihydromyricetin (DHM) is a kind of flavonoid natural product that has been reported to display multiple pharmacological effects, including anti-inflammatory and anti-oxidative properties, and these may contribute to ameliorate MDD...
October 20, 2017: Psychopharmacology
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