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Dorsal striatum

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https://www.readbyqxmd.com/read/29150865/enhanced-mu-opioid-receptor-dependent-opioidergic-modulation-of-striatal-cholinergic-transmission-in-dyt1-dystonia
#1
Giulia Ponterio, Annalisa Tassone, Giuseppe Sciamanna, Valentina Vanni, Maria Meringolo, Massimo Santoro, Nicola Biagio Mercuri, Paola Bonsi, Antonio Pisani
BACKGROUND: Mu opioid receptor activation modulates acetylcholine release in the dorsal striatum, an area deeply involved in motor function, habit formation, and reinforcement learning as well as in the pathophysiology of different movement disorders, such as dystonia. Although the role of opioids in drug reward and addiction is well established, their involvement in motor dysfunction remains largely unexplored. METHODS: We used a multidisciplinary approach to investigate the responses to mu activation in 2 mouse models of DYT1 dystonia (Tor1a(+/Δgag) mice, Tor1a(+/-) torsinA null mice, and their respective wild-types)...
November 18, 2017: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/29147678/a-haplotype-associated-with-enhanced-mineralocorticoid-receptor-expression-facilitates-the-stress-induced-shift-from-cognitive-to-habit-learning
#2
Lisa Wirz, Martin Reuter, Jan Wacker, Andrea Felten, Lars Schwabe
Stress induces a shift from hippocampus-dependent "cognitive" toward dorsal striatum-dependent "habit" memory. However, not all individuals are susceptible to this shift under stress. Based on pharmacological studies indicating a critical role of the mineralocorticoid receptor (MR) in the stress-induced bias toward dorsal striatal learning, we hypothesized that MR gene variants contribute to these individual differences. In two experiments, healthy participants were genotyped, exposed to a stressor or control manipulation and performed a learning task that can be solved using hippocampal or dorsal striatal systems, while electroencephalography (EEG; Experiment I) or functional magnetic resonance imaging (fMRI; Experiment II) measurements were taken...
November 2017: ENeuro
https://www.readbyqxmd.com/read/29146502/protracted-motivational-dopamine-related-deficits-following-adolescence-sugar-overconsumption
#3
Fabien Naneix, Florence Darlot, Véronique De Smedt-Peyrusse, Jean-Rémi Pape, Etienne Coutureau, Martine Cador
Adolescence represents a critical period characterized by major neurobiological changes. Chronic stimulation of the reward system during adolescence might constitute an important factor of vulnerability to pathological development. Increasing evidences suggest that adolescent overconsumption of sweet palatable foods impact reward-based processes. However, the neurobiological bases of these deficits remain poorly understood. Previous studies have demonstrated motivational deficits for palatable foods after sweet diet exposure during adolescence that might involve the dopamine (DA) system, a central actor in incentive processes...
November 13, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29136290/the-role-of-ca-2-dependent-k-channels-at-the-rat-corticostriatal-synapses-revealed-by-paired-pulse-stimulation
#4
Angel A Robles G, Ana V Vega, Carolina Gonzalez-Sandoval, Jaime Barral
Potassium channels play an important role in modulating synaptic activity both at presynaptic and postsynaptic levels. We have shown before that presynaptically located KV and KIR channels modulate the strength of corticostriatal synapses in rat brain, but the role of other types of potassium channels at these synapses remains largely unknown. Here we show that calcium-dependent potassium channels BK-type but not SK-type channels are located presynaptically in corticostriatal synapses. We stimulated cortical neurons in rat brain slices and recorded postsynaptic excitatory potentials (EPSP) in medium spiny neurons (MSN) in dorsal neostriatum...
November 14, 2017: Synapse
https://www.readbyqxmd.com/read/29134961/the-impact-of-combinations-of-alcohol-nicotine-and-cannabis-on-dynamic-brain-connectivity
#5
Victor M Vergara, Barbara J Weiland, Kent Hutchison, Vince D Calhoun
Alcohol, nicotine and cannabis are among the most commonly used drugs. A prolonged and combined use of these substances can alter normal brain wiring in different ways depending on the consumed cocktail mixture. Brain connectivity alterations and their change with time can be assessed using functional magnetic resonance imaging (fMRI) because of its spatial and temporal content. Here, we estimated dynamic functional network connectivity (dFNC) as derived from fMRI data to investigate the effects of single or combined use of alcohol, nicotine and cannabis...
November 14, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29118361/behavioral-changes-after-nicotine-challenge-are-associated-with-%C3%AE-7-nicotinic-acetylcholine-receptor-stimulated-glutamate-release-in-the-rat-dorsal-striatum
#6
In Soo Ryu, Jieun Kim, Su Yeon Seo, Ju Hwan Yang, Jeong Hwan Oh, Dong Kun Lee, Hyun-Wook Cho, Seong Shoon Yoon, Joung-Wook Seo, Suchan Chang, Hee Young Kim, Insop Shim, Eun Sang Choe
Neurochemical alterations associated with behavioral responses induced by re-exposure to nicotine have not been sufficiently characterized in the dorsal striatum. Herein, we report on changes in glutamate concentrations in the rat dorsal striatum associated with behavioral alterations after nicotine challenge. Nicotine challenge (0.4 mg/kg/day, subcutaneous) significantly increased extracellular glutamate concentrations up to the level observed with repeated nicotine administration. This increase occurred in parallel with an increase in behavioral changes in locomotor and rearing activities...
November 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29100991/cue-induced-reinstatement-of-alcohol-seeking-behavior-is-associated-with-increased-camkii-t286-phosphorylation-in-the-reward-pathway-of-mice
#7
Michael C Salling, Christopher J Hodge, Kelly E Psilos, Vallari R Eastman, Sara P Faccidomo, Clyde W Hodge
Cue-induced reinstatement of alcohol-seeking is a hallmark behavioral pathology of addiction. Evidence suggests that reinstatement (e.g., relapse), may be regulated by cell signaling systems that underlie neuroplasticity. A variety of plasticity events require activation of calcium calmodulin-dependent protein kinase II (CaMKII) in components of the reward pathway, such as the nucleus accumbens and amygdala. We sought to determine if cue-induced reinstatement of alcohol-seeking behavior is associated with changes in the activation state (e...
October 31, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/29100904/nicotine-induced-creb-and-deltafosb-activity-is-modified-by-caffeine-in-the-brain-reward-system-of-the-rat
#8
Przemysław Kowiański, Grażyna Lietzau, Aleksandra Steliga, Ewelina Czuba, Beata Ludkiewicz, Monika Waśkow, Jan H Spodnik, Janusz Moryś
Coffee and nicotine consumption are frequently combined, indicating possible intensifying effect of caffeine on smoking behavior, although neurobiological background of this phenomenon remains unknown. We aimed at determining the effect of caffeine and nicotine, applied separately or simultaneously, on activation of six structures of the brain reward system: nucleus accumbens (NAc), ventral tegmental area (VTA), amygdala (Amg), hippocampus (Hip), medial prefrontal cortex (mPfr) and dorsal striatum (CdP) in the adult male Wistar rats...
November 1, 2017: Journal of Chemical Neuroanatomy
https://www.readbyqxmd.com/read/29094787/functional-dysconnectivity-of-the-limbic-loop-of-frontostriatal-circuits-in-first-episode-treatment-naive-schizophrenia
#9
Pan Lin, Xiaosheng Wang, Bei Zhang, Brian Kirkpatrick, Dost Öngür, James J Levitt, Jorge Jovicich, Shuqiao Yao, Xiang Wang
Frontostriatal circuits dysfunction has been implicated in the etiology and psychopathology of patients with schizophrenia (SZ). However, few studies have investigated SZ-related functional connectivity (FC) alterations in discrete frontostriatal circuits and their relationship with pathopsychology in first-episode schizophrenia (FESZ). The goal of this study was to identify dysfunctions in discrete frontostriatal circuits that are associated with key features of FESZ. To this end, a case-control, cross-sectional study was conducted, wherein resting-state (RS) functional magnetic resonance (fMRI) data were collected from 37 treatment-naïve FESZ patients and 29 healthy control (HC) subjects...
November 2, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29090517/increased-glia-density-in-the-caudate-nucleus-in-williams-syndrome-implications-for-frontostriatal-dysfunction-in-autism
#10
Kari L Hanson, Caroline H Lew, Branka Hrvoj-Mihic, Kimberly M Groeniger, Eric Halgren, Ursula Bellugi, Katerina Semendeferi
Williams syndrome (WS) is a rare neurodevelopmental disorder with a well-described, known genetic etiology. In contrast to Autism Spectrum Disorders (ASD), WS has a unique phenotype characterized by global reductions in IQ and visuospatial ability, with relatively preserved language function, enhanced reactivity to social stimuli and music, and an unusual eagerness to interact socially with strangers. A duplication of the deleted region in WS has been implicated in a subset of ASD cases, defining a spectrum of genetic and behavioral variation at this locus defined by these opposite extremes in social behavior...
November 1, 2017: Developmental Neurobiology
https://www.readbyqxmd.com/read/29075568/divergent-anomaly-in-mesocorticolimbic-dopaminergic-circuits-might-be-associated-with-different-depressive-behaviors-an-animal-study
#11
Mei Bai, Xiongzhao Zhu, Li Zhang, Yi Zhang, Liang Xue, Yuting Wang, Mingtian Zhong, Xiuwu Zhang
BACKGROUND: The mesocorticolimbic dopamine system, which originates from the ventral tegmental area (VTA) and projects primarily to the prefrontal cortex (PFC), olfactory tubercle (OT), nucleus accumbens (NAc), dorsal striatum (ST), and the amygdala (AMy), plays a pivotal role in determining individual motivation and sensitivity to rewards, namely, anhedonia. Not all depressive individuals exhibited anhedonia, thus, it is natural to speculate that the heterogenous manifestations of depression might be related to the mesocorticolimbic dopamine system...
October 2017: Brain and Behavior
https://www.readbyqxmd.com/read/29064617/social-comparison-in-the-brain-a-coordinate-based-meta-analysis-of-functional-brain-imaging-studies-on-the-downward-and-upward-comparisons
#12
Yi Luo, Simon B Eickhoff, Sébastien Hétu, Chunliang Feng
Social comparison is ubiquitous across human societies with dramatic influence on people's well-being and decision making. Downward comparison (comparing to worse-off others) and upward comparison (comparing to better-off others) constitute two types of social comparisons that produce different neuropsychological consequences. Based on studies exploring neural signatures associated with downward and upward comparisons, the current study utilized a coordinate-based meta-analysis to provide a refinement of understanding about the underlying neural architecture of social comparison...
October 24, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29064475/brain-substrates-of-unhealthy-versus-healthy-food-choices-influence-of-homeostatic-status-and-body-mass-index
#13
I H Harding, Z B Andrews, F Mata, S Orlandea, I Martínez-Zalacaín, C Soriano-Mas, E Stice, A Verdejo-Garcia
BACKGROUND/OBJECTIVES: Unhealthy dietary choices are a major contributor to harmful weight gain and obesity. This study interrogated the brain substrates of unhealthy versus healthy food choices in vivo, and evaluated the influence of hunger state and body mass index (BMI) on brain activation and connectivity. SUBJECTS/METHODS: Thirty adults (BMI: 18-38 kg m(-2)) performed a food-choice task involving preference-based selection between beverage pairs consisting of high-calorie (unhealthy) or low-calorie (healthy) options, concurrent with functional magnetic resonance imaging (fMRI)...
September 25, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29059451/nicotine-increases-activation-to-anticipatory-valence-cues-in-anterior-insula-and-striatum
#14
Lauren V Moran, Luke E Stoeckel, Kristina Wang, Carolyn E Caine, Rosemond Villafuerte, Vanessa Calderon, Justin T Baker, Dost Ongur, Amy C Janes, Diego A Pizzagalli, A Eden Evins
INTRODUCTION: Smoking is associated with significant morbidity and mortality. Understanding the neurobiology of the rewarding effects of nicotine promises to aid treatment development for nicotine dependence. Through its actions on mesolimbic dopaminergic systems, nicotine engenders enhanced responses to drug-related cues signaling rewards, a mechanism hypothesized to underlie the development and maintenance of nicotine addiction. METHODS: We evaluated the effects of acute nicotine on neural responses to anticipatory cues signaling (non-drug) monetary reward or loss among 11 non-smokers who had no prior history of tobacco smoking...
September 25, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/29049406/distinct-prediction-errors-in-mesostriatal-circuits-of-the-human-brain-mediate-learning-about-the-values-of-both-states-and-actions-evidence-from-high-resolution-fmri
#15
Jaron T Colas, Wolfgang M Pauli, Tobias Larsen, J Michael Tyszka, John P O'Doherty
Prediction-error signals consistent with formal models of "reinforcement learning" (RL) have repeatedly been found within dopaminergic nuclei of the midbrain and dopaminoceptive areas of the striatum. However, the precise form of the RL algorithms implemented in the human brain is not yet well determined. Here, we created a novel paradigm optimized to dissociate the subtypes of reward-prediction errors that function as the key computational signatures of two distinct classes of RL models-namely, "actor/critic" models and action-value-learning models (e...
October 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/29033800/stimulation-of-cortico-subthalamic-projections-amplifies-resting-motor-circuit-activity-and-leads-to-increased-locomotion-in-dopamine-depleted-mice
#16
Teresa H Sanders
Deep brain stimulation (DBS) of the subthalamic nucleus (STN) improves motor function in patients with Parkinson's disease (PD). STN-DBS enables similar improved motor function, including increased movement speed (reduced bradykinesia), in the 6-OHDA dopamine-depletion mouse model of PD. Previous analyses of electrophysiological recordings from STN and motor cortex (M1) have explored signaling changes that correspond to PD and amelioration of PD symptoms. The most common results show an increase in beta frequency power during 'off' states and a reduction in beta during 'on' states...
2017: Frontiers in Integrative Neuroscience
https://www.readbyqxmd.com/read/29033782/neural-correlates-of-direct-access-trading-in-a-real-stock-market-an-fmri-investigation
#17
GianMario Raggetti, Maria G Ceravolo, Lucrezia Fattobene, Cinzia Di Dio
Background: While financial decision making has been barely explored, no study has previously investigated the neural correlates of individual decisions made by professional traders involved in real stock market negotiations, using their own financial resources. Aim: We sought to detect how different brain areas are modulated by factors like age, expertise, psychological profile (speculative risk seeking or aversion) and, eventually, size and type (Buy/Sell) of stock negotiations, made through Direct Access Trading (DAT) platforms...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29031851/constitutive-ret-signaling-leads-to-long-lasting-expression-of-amphetamine-induced-place-conditioning-via-elevation-of-mesolimbic-dopamine
#18
Jaakko Kopra, Marian Villarta-Aguilera, Mari Savolainen, Samo Weingerl, Timo T Myöhänen, Saara Rannanpää, Michael F Salvatore, Jaan-Olle Andressoo, T Petteri Piepponen
Addictive drugs enhance dopamine release in the striatum, which can lead to compulsive drug-seeking after repeated exposure. Glial cell line-derived neurotrophic factor (GDNF) is an important regulator of midbrain dopamine neurons, and may play a mechanistic role in addiction-related behaviors. To elucidate the components of GDNF-signaling that contribute to addiction-related behaviors of place preference and its extinction, we utilized two genetically modified GDNF mouse models in an amphetamine-induced conditioned place preference (CPP) paradigm and evaluated how the behavioral findings correlate with dopamine signaling in the dorsal and ventral striatum...
October 13, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29030431/distinctive-modulation-of-dopamine-release-in-the-nucleus-accumbens-shell-mediated-by-dopamine-and-acetylcholine-receptors
#19
Jung Hoon Shin, Martin F Adrover, Veronica A Alvarez
Nucleus accumbens (NAc) shell shows unique dopamine (DA) signals in vivo and plays a unique role in DA dependent behaviors, such as reward-motivated learning and the response to drugs of abuse. A di-synaptic mechanism for DA release was reported and shown to require synchronized firing of cholinergic interneurons (CINs) and activation of nicotinic acetylcholine (ACh) receptors (nAChRs) in DA neuron (DAN) axons. The properties of this di-synaptic mechanism of DA transmission is not well understood in the NAc shell...
October 13, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29027111/excessive-d1-dopamine-receptor-activation-in-the-dorsal-striatum-promotes-autistic-like-behaviors
#20
Yunjin Lee, Hannah Kim, Ji-Eun Kim, Jin-Young Park, Juli Choi, Jung-Eun Lee, Eun-Hwa Lee, Pyung-Lim Han
The dopamine system has been characterized in motor function, goal-directed behaviors, and rewards. Recent studies recognize various dopamine system genes as being associated with autism spectrum disorder (ASD). However, how dopamine system dysfunction induces ASD pathophysiology remains unknown. In the present study, we demonstrated that mice with increased dopamine functions in the dorsal striatum via the suppression of dopamine transporter expression in substantia nigra neurons or the optogenetic stimulation of the nigro-striatal circuitry exhibited sociability deficits and repetitive behaviors relevant to ASD pathology in animal models, while these behavioral changes were blocked by a D1 receptor antagonist...
October 12, 2017: Molecular Neurobiology
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