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https://www.readbyqxmd.com/read/28534873/molecular-indicators-of-stress-induced-neuroinflammation-in-a-mouse-model-simulating-features-of-post-traumatic-stress-disorder
#1
S Muhie, A Gautam, N Chakraborty, A Hoke, J Meyerhoff, R Hammamieh, M Jett
A social-stress mouse model was used to simulate features of post-traumatic stress disorder (PTSD). The model involved exposure of an intruder (male C57BL/6) mouse to a resident aggressor (male SJL) mouse for 5 or 10 consecutive days. Transcriptome changes in brain regions (hippocampus, amygdala, medial prefrontal cortex and hemibrain), blood and spleen as well as epigenome changes in the hemibrain were assayed after 1- and 10-day intervals following the 5-day trauma or after 1- and 42-day intervals following the 10-day trauma...
May 23, 2017: Translational Psychiatry
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
#2
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/28527575/coup-tf-genes-human-diseases-and-the-development-of-the-central-nervous-system-in-murine-models
#3
Xiong Yang, Su Feng, Ke Tang
COUP-TFI and -TFII are members of the steroid/thyroid nuclear receptor superfamily. Recent clinical studies reveal that COUP-TFI gene mutations are associated with Bosch-Boonstra-Schaaf optic atrophy syndrome displaying symptoms of optic atrophy, intellectual disability, hypotonia, seizure, autism spectrum disorders, oromotor dysfunction, thin corpus callosum, or hearing defects, and COUP-TFII gene mutations lead to congenital heart defects and/or congenital diaphragmatic hernia with developmental delay and mental defects...
2017: Current Topics in Developmental Biology
https://www.readbyqxmd.com/read/28526575/percutaneous-electrical-nerve-field-stimulation-modulates-central-pain-pathways-and-attenuates-post-inflammatory-visceral-and-somatic-hyperalgesia-in-rats
#4
Reji Babygirija, Manu Sood, Pradeep Kannampalli, Jyoti N Sengupta, Adrian Miranda
A non-invasive, auricular percutaneous electrical nerve field stimulation (PENFS) has been suggested to modulate central pain pathways. We investigated the effects of BRIDGE® device on the responses of amygdala and lumbar spinal neurons and the development of post-colitis hyperalgesia. Male Sprague-Dawley rats received intracolonic trinitrobenzene sulfonic acid (TNBS) and PENFS on the same day. Control rats had sham devices. The visceromotor response (VMR) to colon distension and paw withdrawal threshold (PWT) was recorded after 7 days...
May 16, 2017: Neuroscience
https://www.readbyqxmd.com/read/28526294/central-amygdala-activation-of-extracellular-signal-regulated-kinase-1-and-age-dependent-changes-in-inflammatory-pain-sensitivity-in-mice
#5
Katelyn E Sadler, Nathan M Gartland, Jane E Cavanaugh, Benedict J Kolber
Aging populations are more sensitive to noxious stimuli as a result of altered somatosensory systems. In these experiments, we examined pain-like behaviors in young, middle-aged, and old mice during peripheral inflammation to determine if the same sensitivity exists in preclinical animal models. Immediately following injury, middle-aged and old mice exhibited more spontaneous pain-like behaviors than young mice, matching pain prevalence in clinical populations. Middle-aged and old mice also developed persistent mechanical hypersensitivity in the injured paw...
April 26, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28512686/amygdala-structure-and-core-dimensions-of-the-affective-personality
#6
Sascha Frühholz, Katja Schlegel, Didier Grandjean
While biological models of human personality propose that socio-affective traits and skills are rooted in the structure of the amygdala, empirical evidence remains sparse and inconsistent. Here, we used a comprehensive assessment of the affective personality and tested its association with global, local, and laterality measures of the amygdala structure. Results revealed three broad dimensions of the affective personality that were differentially related to bilateral amygdala structures. Dysfunctional and maladaptive affective traits were associated with a global size and local volume reduction of the amygdala, whereas adaptive emotional skills were linked to an increased size of the left amygdala...
May 16, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28502529/mechanisms-underlying-the-early-risk-to-develop-anxiety-and-depression-a-translational-approach
#7
REVIEW
Ned H Kalin
Anxious temperament (AT) is an early life disposition that markedly increases the risk to develop stress related psychopathology such as anxiety and depressive disorders. Since anxiety and depression are common, and frequently have their onset early in life, a better understanding of the factors related to their childhood onset will facilitate the development of new more effective neurally informed interventions. A nonhuman primate (NHP) developmental model of childhood AT has been established, which has provided an understanding of the neural systems and molecular mechanisms mediating the development of AT...
May 11, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28502217/hippocampal-low-frequency-stimulation-inhibits-afterdischarge-and-increases-gaba-a-receptor-expression-in-amygdala-kindled-pharmacoresistant-epileptic-rats
#8
Guofeng Wu, Likun Wang, Zhen Hong, Siying Ren, Feng Zhou
OBJECTIVE: The purpose of the present study was to observe the effects of hippocampal low-frequency stimulation (Hip-LFS) on amygdala afterdischarge and GABA (A) receptor expression in pharmacoresistant epileptic (PRE) rats. METHODS: A total of 110 healthy adult male Wistar rats were used to generate a model of epilepsy by chronic stimulation of the amygdala. Sixteen PRE rats were selected from 70 amygdala-kindled rats by testing their response to Phenytoin and Phenobarbital, and they were randomly assigned to a pharmacoresistant stimulation group (PRS group, 8 rats) or a pharmacoresistant control group (PRC group, 8 rats)...
May 14, 2017: Neurological Research
https://www.readbyqxmd.com/read/28499100/probing-for-neuroadaptations-to-unpredictable-stressors-in-addiction-translational-methods-and-emerging-evidence
#9
Jesse T Kaye, Daniel E Bradford, Katherine P Magruder, John J Curtin
Stressors clearly contribute to addiction etiology and relapse in humans, but our understanding of specific mechanisms remains limited. Rodent models of addiction offer the power, flexibility, and precision necessary to delineate the causal role and specific mechanisms through which stressors influence alcohol and other drug use. This review describes a program of research using startle potentiation to unpredictable stressors that is well positioned to translate between animal models and clinical research with humans on stress neuroadaptations in addiction...
May 2017: Journal of Studies on Alcohol and Drugs
https://www.readbyqxmd.com/read/28491025/change-of-rin1-and-stathmin-in-the-animal-model-of-traumatic-stresses
#10
Fang Han, Jingzhi Jiang, Jinlan Ding, Hong Liu, Bing Xiao, Yuxiu Shi
The molecular mechanism of fear memory is poorly understood. Therefore, the pathogenesis of post-traumatic stress disorder (PTSD), whose symptom presentation can enhance fear memory, remains largely unclear. Recent studies with knockout animals have reported that Rin1 and stathmin regulate fear memory. Rin1 inhibits acquisition and promotes memory extinction, whereas stathmin regulates innate and basal fear. The aim of our study was to examine changes in the expression of Rin1 and stathmin in different animal models of stress, particluarly traumatic stress...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28487648/regional-brain-volumes-moderate-but-do-not-mediate-the-effects-of-group-based-exercise-training-on-reductions-in-loneliness-in-older-adults
#11
Diane K Ehlers, Ana M Daugherty, Agnieszka Z Burzynska, Jason Fanning, Elizabeth A Awick, Laura Chaddock-Heyman, Arthur F Kramer, Edward McAuley
Introduction: Despite the prevalence of and negative health consequences associated with perceived loneliness in older adults, few studies have examined interactions among behavioral, psychosocial, and neural mechanisms. Research suggests that physical activity and improvements in perceived social support and stress are related to reductions in loneliness. Yet, the influence of brain structure on these changes is unknown. The present study examined whether change in regional brain volume mediated the effects of changes in social support and stress on change in perceived loneliness after an exercise intervention...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28485718/transcriptional-profile-of-hippocampal-dentate-granule-cells-in-four-rat-epilepsy-models
#12
Raymond Dingledine, Douglas A Coulter, Brita Fritsch, Jan A Gorter, Nadia Lelutiu, James McNamara, J Victor Nadler, Asla Pitkänen, Michael A Rogawski, Pate Skene, Robert S Sloviter, Yu Wang, Wytse J Wadman, Claude Wasterlain, Avtar Roopra
Global expression profiling of neurologic or psychiatric disorders has been confounded by variability among laboratories, animal models, tissues sampled, and experimental platforms, with the result being that few genes demonstrate consistent expression changes. We attempted to minimize these confounds by pooling dentate granule cell transcriptional profiles from 164 rats in seven laboratories, using three status epilepticus (SE) epilepsy models (pilocarpine, kainate, self-sustained SE), plus amygdala kindling...
May 9, 2017: Scientific Data
https://www.readbyqxmd.com/read/28485259/distinct-phasic-and-sustained-brain-responses-and-connectivity-of-amygdala-and-bed-nucleus-of-the-stria-terminalis-during-threat-anticipation-in-panic-disorder
#13
L Brinkmann, C Buff, K Feldker, S V Tupak, M P I Becker, M J Herrmann, T Straube
BACKGROUND: Panic disorder (PD) patients are constantly concerned about future panic attacks and exhibit general hypersensitivity to unpredictable threat. We aimed to reveal phasic and sustained brain responses and functional connectivity of the amygdala and the bed nucleus of the stria terminalis (BNST) during threat anticipation in PD. METHODS: Using functional magnetic resonance imaging (fMRI), we investigated 17 PD patients and 19 healthy controls (HC) during anticipation of temporally unpredictable aversive and neutral sounds...
May 9, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28480579/longitudinal-epigenetic-predictors-of-amygdala-hippocampus-volume-ratio
#14
Esther Walton, Charlotte A M Cecil, Matthew Suderman, Jingyu Liu, Jessica A Turner, Vince Calhoun, Stefan Ehrlich, Caroline L Relton, Edward D Barker
BACKGROUND: The ratio between amygdala:hippocampal (AH) volume has been associated with multiple psychiatric problems, including anxiety and aggression. Yet, little is known about its biological underpinnings. Here, we used a methylome-wide approach to test (a) whether DNA methylation in early life (birth, age 7) prospectively associates with total AH volume ratio in early adulthood, and (b) whether significant DNA methylation markers are influenced by prenatal risk factors. METHODS: Analyses were based on a subsample (n = 109 males) from the Avon Longitudinal Study of Parents and Children, which included measures of prenatal risk, DNA methylation (Infinium Illumina 450k), T1-weighted brain scans and psychopathology in early adulthood (age 18-21)...
May 8, 2017: Journal of Child Psychology and Psychiatry, and Allied Disciplines
https://www.readbyqxmd.com/read/28478685/resting-state-functional-connectivity-in-generalized-anxiety-disorder-and-social-anxiety-disorder-evidence-for-a-dimensional-approach
#15
Liron Rabany, Gretchen J Diefenbach, Laura B Bragdon, Brian P Pittman, Luis Zertuche, David F Tolin, John W Goethe, Michal Assaf
INTRODUCTION: Generalized anxiety disorder (GAD) and social anxiety disorder (SAD) are currently considered distinct diagnostic categories. Accumulating data suggest the study of anxiety disorders may benefit from the use of dimensional conceptualizations. One such dimension of shared dysfunction is emotion regulation (ER). The current study evaluated dimensional (ER) and categorical (diagnosis) neurocorrelates of fMRI resting-state functional connectivity (rsFC) in participants with GAD and SAD, and healthy controls (HC)...
May 6, 2017: Brain Connectivity
https://www.readbyqxmd.com/read/28473645/dopamine-receptors-differentially-control-binge-alcohol-drinking-mediated-synaptic-plasticity-of-the-core-nucleus-accumbens-direct-and-indirect-pathways
#16
Xincai Ji, Sucharita Saha, Jenya Kolpakova, Melissa Guildford, Andrew R Tapper, Gilles E Martin
Binge alcohol drinking, a behavior characterized by rapid repeated alcohol intakes, is most prevalent in young adults and a risk factor for excessive alcohol consumption and alcohol dependence. Although alteration of synaptic plasticity is thought to contribute to this behavior, there is currently little evidence that this is the case. We used drinking-in-the-dark (DID) as a model of binge alcohol drinking to assess its effects on spike-timing-dependent plasticity (STDP) in medium spiny neurons (MSNs) of the core nucleus accumbens (NAc) by combining patch clamp recordings with calcium imaging and optogenetics...
May 4, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28469557/modulation-of-the-hypothalamic-pituitary-adrenal-axis-by-early-life-stress-exposure
#17
REVIEW
Miranda van Bodegom, Judith R Homberg, Marloes J A G Henckens
Exposure to stress during critical periods in development can have severe long-term consequences, increasing overall risk on psychopathology. One of the key stress response systems mediating these long-term effects of stress is the hypothalamic-pituitary-adrenal (HPA) axis; a cascade of central and peripheral events resulting in the release of corticosteroids from the adrenal glands. Activation of the HPA-axis affects brain functioning to ensure a proper behavioral response to the stressor, but stress-induced (mal)adaptation of the HPA-axis' functional maturation may provide a mechanistic basis for the altered stress susceptibility later in life...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28466069/early-social-isolation-stress-and-perinatal-nmda-receptor-antagonist-treatment-induce-changes-in-the-structure-and-neurochemistry-of-inhibitory-neurons-of-the-adult-amygdala-and-prefrontal-cortex
#18
Esther Castillo-Gómez, Marta Pérez-Rando, María Bellés, Javier Gilabert-Juan, José Vicente Llorens, Héctor Carceller, Clara Bueno-Fernández, Clara García-Mompó, Beatriz Ripoll-Martínez, Yasmina Curto, Noelia Sebastiá-Ortega, María Dolores Moltó, Julio Sanjuan, Juan Nacher
The exposure to aversive experiences during early life influences brain development and leads to altered behavior. Moreover, the combination of these experiences with subtle alterations in neurodevelopment may contribute to the emergence of psychiatric disorders, such as schizophrenia. Recent hypotheses suggest that imbalances between excitatory and inhibitory (E/I) neurotransmission, especially in the prefrontal cortex and the amygdala, may underlie their etiopathology. In order to understand better the neurobiological bases of these alterations, we studied the impact of altered neurodevelopment and chronic early-life stress on these two brain regions...
March 2017: ENeuro
https://www.readbyqxmd.com/read/28464508/limbic-grey-matter-changes-in-early-parkinson-s-disease
#19
Xingfeng Li, Yue Xing, Stefan T Schwarz, Dorothee P Auer
The purpose of this study was to investigate local and network-related changes of limbic grey matter in early Parkinson's disease (PD) and their inter-relation with non-motor symptom severity. We applied voxel-based morphometric methods in 538 T1 MRI images retrieved from the Parkinson's Progression Markers Initiative website. Grey matter densities and cross-sectional estimates of age-related grey matter change were compared between subjects with early PD (n = 366) and age-matched healthy controls (n = 172) within a regression model, and associations of grey matter density with symptoms were investigated...
May 2, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28462087/identification-of-brain-regions-predicting-epileptogenesis-by-serial-18-f-ge-180-positron-emission-tomography-imaging-of-neuroinflammation-in-a-rat-model-of-temporal-lobe-epilepsy
#20
Vera Russmann, Matthias Brendel, Erik Mille, Angela Helm-Vicidomini, Roswitha Beck, Lisa Günther, Simon Lindner, Axel Rominger, Michael Keck, Josephine D Salvamoser, Nathalie L Albert, Peter Bartenstein, Heidrun Potschka
Excessive activation of inflammatory signaling pathways seems to be a hallmark of epileptogenesis. Positron emission tomography (PET) allows in vivo detection of brain inflammation with spatial information and opportunities for longitudinal follow-up scanning protocols. Here, we assessed whether molecular imaging of the 18 kDa translocator protein (TSPO) can serve as a biomarker for the development of epilepsy. Therefore, brain uptake of [(18)F]GE-180, a highly selective radioligand of TSPO, was investigated in a longitudinal PET study in a chronic rat model of temporal lobe epilepsy...
2017: NeuroImage: Clinical
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