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chronic mild stress

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https://www.readbyqxmd.com/read/28549965/microrna-101-in-the-ventrolateral-orbital-cortex-vlo-modulates-depressive-like-behaviors-in-rats-and-targets-dual-specificity-phosphatase-1-dusp1
#1
Yan Zhao, Shuang Wang, Zheng Chu, Yonghui Dang, Juanxia Zhu, Xingli Su
Long-term exposure to stress plays a key role in the pathogenesis of major depression. Recently, the ventrolateral orbital cortex (VLO) has received considerable attention for its role in the antidepressant response. However, the mechanisms underlying stress response in the VLO remain largely elusive. MiR-101 has been implicated in regulating multiple neurological processes. The present study used the chronic unpredictable mild stress (CUMS) rat model to investigate the expression of miR-101 in the VLOs of rat brains and the possible relevance of miR-101 to depression...
May 23, 2017: Brain Research
https://www.readbyqxmd.com/read/28539867/prevalence-of-periodontal-disease-its-association-with-systemic-diseases-and-prevention
#2
REVIEW
Muhammad Ashraf Nazir
Periodontal diseases are prevalent both in developed and developing countries and affect about 20-50% of global population. High prevalence of periodontal disease in adolescents, adults, and older individuals makes it a public health concern. Several risk factors such as smoking, poor oral hygiene, diabetes, medication, age, hereditary, and stress are related to periodontal diseases. Robust evidence shows the association of periodontal diseases with systemic diseases such as cardiovascular disease, diabetes, and adverse pregnancy outcomes...
April 2017: International Journal of Health Sciences
https://www.readbyqxmd.com/read/28536916/advanced-parental-age-impaired-fear-conditioning-and-hippocampal-ltd-in-adult-female-rat-offspring
#3
Lilu Luo, Tingting Sun, Xin Guan, Yiling Ni, Liqiang Yang, Quan Zhao, Xiangyang Kong, Yanmei Chen, Jichuan Zhang
Advanced maternal or paternal age is associated with increased risks of cognitive and emotional disorders. Chronic stress is also a common experience in human life that causes psychiatric diseases. However, the synergistic effects of these two factors on offspring are rarely studied. In the present study, the offspring of both young (3-4 months) and old (12-14 months) rat parents were given CUMS for 21 days at the age of 4 weeks. The effects of advanced parental age and chronic unpredictable mild stress (CUMS) on emotional and cognitive behaviors and the related cellular mechanisms were investigated by using behavioral and electrophysiological techniques...
May 23, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28527954/sex-differences-in-the-effect-of-chronic-mild-stress-on-mouse-prefrontal-cortical-bdnf-levels-a-role-of-major-ovarian-hormones
#4
Bhanu Chandra Karisetty, Pranav Chintamani Joshi, Arvind Kumar, Sumana Chakravarty
Depression induced by stress is affected by sex, age and hormonal status of the animal and also by duration and type of the stressors. Moreover, higher prevalence of depression and comorbidities in women than men implies the need to include the sex variable in studies on animal models of depression. The present study was therefore initiated to evaluate the effect of sex and ovarian hormones on depression-like phenotypes in mice exposed to a 21-day Chronic Variable Mild Stress (CVMS) paradigm. Adult male, intact female and, ovariectomized (OVX) female mice exposed to CVMS displayed despair behavior, a depression-like phenotype, in all the groups...
May 17, 2017: Neuroscience
https://www.readbyqxmd.com/read/28527694/voluntary-wheel-running-ameliorates-depression-like-behaviors-and-brain-blood-oxygen-level-dependent-signals-in-chronic-unpredictable-mild-stress-mice
#5
Peng Huang, Zhaoyang Dong, Weiliang Huang, Chuying Zhou, Weichao Zhong, Peiqian Hu, Ge Wen, Xuegang Sun, Heyu Hua, Huihui Cao, Lei Gao, Zhiping Lv
BACKGROUND: Physical exercise has been long recognized for its therapeutic effects on depressive disorders, but the underlying mechanisms remain largely unknown. In the study, we investigated whether the physical exercise by voluntary wheel running (VWR) alters depression-like behaviors and its impact on brain blood oxygen level-dependent (BOLD) signals in mice. METHODS: Adult male C57BL/6 mice were assigned to one of the following groups; (1) no exercise control (noEx), housed in a standard cage; (2) exercise (Ex), 2hours/day in a running wheel apparatus; (3) chronic unpredictable mild stress (CUMS), which was imitating adult stress; and (4) CUMS+Ex...
May 17, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28526869/blocking-of-carnitine-palmitoyl-transferase-1-potently-reduces-stress-induced-depression-in-rat-highlighting-a-pivotal-role-of-lipid-metabolism
#6
Anne Skøttrup Mørkholt, Ove Wiborg, Jette G K Nieland, Søren Nielsen, John Dirk Nieland
Major depressive disorder is a complex and common mental disease, for which the pathology has not been elucidated. The purpose of this study is to provide knowledge about the importance of mitochondrial dysfunction, dysregulated lipid metabolism and inflammation. Mitochondrial carnitine palmitoyl transferase 1a (CPT1a) is a key molecule involved in lipid metabolism and mutations in CPT1a causing reduced function is hypothesized to have a protective role in the development of depression. Moreover, CPT1a is found to be upregulated in suicide patients with history of depression...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28523481/mild-depression-in-low-back-pain-the-interaction-of-thought-suppression-and-stress-plays-a-role-especially-in-female-patients
#7
Konietzny Kerstin, Chehadi Omar, Streitlein-Böhme Irmgard, Rusche Herbert, Willburger Roland, Hasenbring Monika Ilona
PURPOSE: Mild depression has been shown as a precursor and as a consequence of low back pain, even in early phases of acute or subacute pain. Chronic daily life stress as well as dysfunctional pain-related cognitions such as thought suppression (TS) seem to play a role in the pain-depression cycle; however, the mechanisms of these associations are less understood. Experimentally induced TS, conceived as the attempt to directly suppress sensations such as pain, has been shown to paradoxically cause a delayed and non-volitional return of the suppressed thoughts and sensations and to increase affective distress...
May 18, 2017: International Journal of Behavioral Medicine
https://www.readbyqxmd.com/read/28523193/mechanisms-underlying-the-antidepressant-response-of-acupuncture-via-pka-creb-signaling-pathway
#8
Huili Jiang, Xuhui Zhang, Yu Wang, Huimin Zhang, Jing Li, Xinjing Yang, Bingcong Zhao, Chuntao Zhang, Miao Yu, Mingmin Xu, Qiuyun Yu, Xingchen Liang, Xiang Li, Peng Shi, Tuya Bao
Protein kinase A (PKA)/cAMP response element-binding (CREB) protein signaling pathway, contributing to impaired neurogenesis parallel to depressive-like behaviors, has been identified as the crucial factor involved in the antidepressant response of acupuncture. However, the molecular mechanisms associated with antidepressant response of acupuncture, neurogenesis, and depressive-like behaviors ameliorating remain unexplored. The objective was to identify the mechanisms underlying the antidepressant response of acupuncture through PKA signaling pathway in depression rats by employing the PKA signaling pathway inhibitor H89 in in vivo experiments...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28515793/does-the-diurnal-cycle-of-cortisol-explain-the-relationship-between-physical-performance-and-cognitive-function-in-older-adults
#9
B Dijckmans, J Tortosa-Martínez, N Caus, G González-Caballero, B Martínez-Pelegrin, C Manchado-Lopez, J M Cortell-Tormo, I Chulvi-Medrano, A Clow
BACKGROUND: Regular physical activity is a promising strategy to treat and prevent cognitive decline. The mechanisms that mediate these benefits are not fully clear but physical activity is thought to attenuate the harmful effects of chronic psychological stress and hypercortisolism on cognition. However, the circadian pattern of cortisol secretion is complex and it is not known which aspects are most closely associated with increased cognitive function and better physical performance...
2017: European Review of Aging and Physical Activity
https://www.readbyqxmd.com/read/28511279/blast-associated-traumatic-brain-injury-in-the-military-as-a-potential-trigger-for-dementia-and-chronic-traumatic-encephalopathy
#10
James Hasoon
Traumatic brain injuries (TBIs) resulting from blast exposures have significantly affected US military personnel throughout the world, particularly in Iraq and Afghanistan. From 2000-2016, more than 350,000 military service members were diagnosed with a TBI. Since the majority of blast-related TBIs are classified as mild with no definitive findings on physical examination or diagnostic studies, it is difficult to accurately diagnose individuals inflicted with such injuries. There are likely far more mild TBIs that remain undiagnosed in the military...
January 2017: U.S. Army Medical Department Journal
https://www.readbyqxmd.com/read/28510784/effects-of-acute-and-chronic-hypoxia-on-acid-base-regulation-hematology-ion-and-osmoregulation-of-juvenile-american-paddlefish
#11
Daniel L Aboagye, Peter J Allen
Despite the increasing prevalence of hypoxia in natural habitats occupied by the American paddlefish, basal bony fish, and ram ventilator, information about its response to hypoxia is scarce. To understand the physiological and biochemical responses of juvenile paddlefish (~150 g) to acute (<24 h) and chronic hypoxia (≥24 h), blood oxygen transport, blood acid-base balance, and metabolic stress were evaluated under four different partial pressures of oxygen [pO2; normoxia (148 mmHg), mild hypoxia (89 mmHg), moderate hypoxia (59 mmHg), and extreme hypoxia (36 mmHg)], all at 21 °C...
May 16, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28509906/therapeutic-efficacy-of-atypical-antipsychotic-drugs-by-targeting-multiple-stress-related-metabolic-pathways
#12
H L Cai, P Jiang, Q Y Tan, R L Dang, M M Tang, Y Xue, Y Deng, B K Zhang, P F Fang, P Xu, D X Xiang, H D Li, J K Yao
Schizophrenia (SZ) is considered to be a multifactorial brain disorder with defects involving many biochemical pathways. Patients with SZ show variable responses to current pharmacological treatments of SZ because of the heterogeneity of this disorder. Stress has a significant role in the pathophysiological pathways and therapeutic responses of SZ. Atypical antipsychotic drugs (AAPDs) can modulate the stress response of the hypothalamic-pituitary-adrenal (HPA) axis and exert therapeutic effects on stress by targeting the prefrontal cortex (PFC) and hippocampus...
May 16, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28507504/effects-of-%C3%AE-2a-adrenoceptors-on-norepinephrine-secretion-from-the-locus-coeruleus-during-chronic-stress-induced-depression
#13
Bin Wang, Ying Wang, Qiong Wu, Hong-Ping Huang, Shao Li
Chronic stressors can often lead to the development of psychological disorders, such as depression and anxiety. The locus coeruleus (LC) is a stress sensitive brain region located in the pons, with noradrenergic neurons that project to the hypothalamus, especially the paraventricular nucleus (PVN) of the hypothalamus. The purpose of this paper is to better understand how alpha 2A-adrenoceptors (α2A-ARs) and LC-hypothalamus noradrenergic system participate in the pathophysiological mechanism of depression. In vivo norepinephrine (NE) release in the PVN triggered by electrical stimulation in the LC was detected with carbon fiber electrodes in depression model of rats induced by chronic unpredictable mild stress (CUMS)...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28505018/the-variation-of-the-5-hydroxytryptamine-system-between-chronic-unpredictable-mild-stress-rats-and-chronic-fatigue-syndrome-rats-induced-by-forced-treadmill-running
#14
Yin Cao, Qinglin Li
The aim of this study was to observe the variation in the 5-hydroxytryptamine (5-HT) system between a chronic unpredictable mild stress (CUMS) model and a chronic fatigue syndrome (CFS) model. The total distance, the crossing pieces, and rearing times in the open-field test of the CUMS group and the CFS group were all less than those of the control group to different degrees. The concentrations of tryptophan, 5-HT, and 5-HIAA of the CUMS group were obviously lower than those of the control group. In the CFS model, the concentrations of tryptophan, 5-HT, and 5-HIAA were obviously higher than those of the control group...
May 12, 2017: Neuroreport
https://www.readbyqxmd.com/read/28501772/hyperoside-protects-against-chronic-mild-stress-induced-learning-and-memory-deficits
#15
Yeli Gong, Youhua Yang, Xiaoqing Chen, Min Yang, Dan Huang, Rong Yang, Lianying Zhou, Changlei Li, Qiuju Xiong, Zhe Xiong
Hyperoside (quercetin-3-O-b-d-galactosidepyranose) is a plant-derived flavonoid mainly found in fruits, fruit juices (most notably flavanols, flavanones, and anthocyanins) and Chinese traditional medicines. It has been applied to relieve pain and improve cardiovascular functions in clinic. However, the effects of hyperoside on cognitive impairment induced by chronic stress and the underlying molecular mechanisms remain unclear. In the current study, we used chronic mild stress (CMS) rats to investigate the effects of hyperoside on learning and memory and further explore the possible mechanisms...
May 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28501680/dilated-virchow-robin-spaces-in-the-hippocampus-impact-behaviors-and-effects-of-anti-depressant-treatment-in-model-of-depressed-rats
#16
Yuefeng Li, Jinchuan Yan, Xiaolan Zhu, Yan Zhu, Shun Yao, Yuhao Xu, Shenghong Ju
The occurrences of dilated Virchow-Robin spaces (dVRSs) and inflammatory factors were closely related with development of depression and antidepressants. The present study indicated accumulation of inflammatory factors in dVRSs played a practical role in behaviors and the treatment-resistant in rats with depression. Eighty-one male Wistar rats were exposed to chronic unpredictable mild stress (CUMS) until the model was successfully established. According to the detection of dVRSs on 7 T structural magnetic resonance imaging (MRI), rats were divided into two groups (45 CUMS(non-dVRSs) rats and 36 CUMS(dVRSs) rats)...
April 21, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28498421/molecular-analysis-of-the-mouse-brain-exposed-to-chronic-mild-stress-the-influence-of-hepatocyte-nuclear-factor-4%C3%AE-on-physiological-homeostasis
#17
Kaoru Ikubo, Kyosuke Yamanishi, Nobutaka Doe, Takuya Hashimoto, Miho Sumida, Yuko Watanabe, Yosif El-Darawish, Wen Li, Haruki Okamura, Hiromichi Yamanishi, Hisato Matsunaga
Major depressive disorder (MDD) is a prevalent disorder that causes considerable disability in social functioning and is a risk factor for physical diseases. Recent clinical reports have demonstrated a marked association between MDD and physiological dyshomeostasis induced by metabolic disorders, including diabetes, hormone abnormalities and autoimmune diseases. The authors of the present study have previously analyzed comparative gene expression profiles in the prefrontal cortex (PFC) of a chronic mild stress (CMS) animal model of MDD...
May 11, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28492545/chronically-stressed-or-stress-preconditioned-neurons-fail-to-maintain-stress-granule-assembly
#18
Tatyana A Shelkovnikova, Pasquale Dimasi, Michail S Kukharsky, Haiyan An, Annamaria Quintiero, Claire Schirmer, Luc Buée, Marie-Christine Galas, Vladimir L Buchman
Dysregulation of stress granules (SGs) and their resident proteins contributes to pathogenesis of a number of (neuro)degenerative diseases. Phosphorylation of eIF2α is an event integrating different types of cellular stress and it is required for SG assembly. Phosphorylated eIF2α (p-eIF2α) is upregulated in the nervous system in some neurodegenerative conditions. We found that increasing p-eIF2α level by proteasomal inhibition in cultured cells, including mouse and human neurons, before a SG-inducing stress ('stress preconditioning'), limits their ability to maintain SG assembly...
May 11, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28484990/behavioral-and-biochemical-impact-of-chronic-unpredictable-mild-stress-on-the-acquisition-of-nicotine-conditioned-place-preference-in-rats
#19
G Biala, K Pekala, A Boguszewska-Czubara, A Michalak, M Kruk-Slomka, K Grot, B Budzynska
Addiction is a chronic psychiatric disease which represents a global problem, and stress can increase drug addiction and relapse. Taking into account frequent concomitance of nicotine dependence and stress, the purpose of the present study was to assess behavioral and biochemical effects of chronic unpredictable mild stress (CUMS) exposure on nicotine reward in rats measured in the conditioned place preference (CPP) paradigm. Rats were submitted to the CUMS for 3 weeks and conditioned with nicotine (0.175 mg/kg) for 2 or 3 days...
May 8, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28484705/corrigendum-to-young-adult-male-rats-vulnerability-to-chronic-mild-stress-is-reflected-by-anxious-like-instead-of-depressive-like-behaviors
#20
José Jaime Herrera-Pérez, Venus Benítez-Coronel, Graciela Jiménez-Rubio, Olivia Tania Hernández-Hernández, Lucía Martínez-Mota
[This corrects the article DOI: 10.1155/2016/5317242.].
2017: Neuroscience Journal
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