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Nucleus accumbens dopamine

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https://www.readbyqxmd.com/read/29339486/cell-type-specific-role-for-nucleus-accumbens-neuroligin-2-in-depression-and-stress-susceptibility
#1
Mitra Heshmati, Hossein Aleyasin, Caroline Menard, Daniel J Christoffel, Meghan E Flanigan, Madeline L Pfau, Georgia E Hodes, Ashley E Lepack, Lucy K Bicks, Aki Takahashi, Ramesh Chandra, Gustavo Turecki, Mary Kay Lobo, Ian Maze, Sam A Golden, Scott J Russo
Behavioral coping strategies are critical for active resilience to stress and depression; here we describe a role for neuroligin-2 (NLGN-2) in the nucleus accumbens (NAc). Neuroligins (NLGN) are a family of neuronal postsynaptic cell adhesion proteins that are constituents of the excitatory and inhibitory synapse. Importantly, NLGN-3 and NLGN-4 mutations are strongly implicated as candidates underlying the development of neuropsychiatric disorders with social disturbances such as autism, but the role of NLGN-2 in neuropsychiatric disease states is unclear...
January 16, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29333488/dopamine-development-in-the-mouse-orbital-prefrontal-cortex-is-protracted-and-sensitive-to-amphetamine-in-adolescence
#2
Daniel Hoops, Lauren M Reynolds, Jose-Maria Restrepo-Lozano, Cecilia Flores
The prefrontal cortex (PFC) is divided into subregions, including the medial and orbital prefrontal cortices. Dopamine connectivity in the medial PFC (mPFC) continues to be established throughout adolescence as the result of the continuous growth of axons that innervated the nucleus accumbens (NAcc) prior to adolescence. During this period, dopamine axons remain vulnerable to environmental influences, such as drugs used recreationally by humans. The developmental trajectory of the orbital prefrontal dopamine innervation remains almost completely unstudied...
January 2018: ENeuro
https://www.readbyqxmd.com/read/29326171/abdominal-vagal-afferents-modulate-the-brain-transcriptome-and-behaviors-relevant-to-schizophrenia
#3
Melanie Klarer, Jean-Philippe Krieger, Juliet Richetto, Ulrike Weber-Stadlbauer, Lydia Günther, Christine Winter, Myrtha Arnold, Wolfgang Langhans, Urs Meyer
Reduced activity of vagal efferents has long been implicated in schizophrenia and appears to be responsible for diminished parasympathetic activity and associated peripheral symptoms such as low heart rate variability and cardiovascular complications in affected individuals. In contrast, only little attention has been paid to the possibility that impaired afferent vagal signaling may be relevant for the disorder's pathophysiology as well. The present study explored this hypothesis using a model of subdiaphragmatic vagal deafferentation (SDA) in male rats...
January 11, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29321525/exploring-the-consequences-of-social-defeat-stress-and-intermittent-ethanol-drinking-on-dopamine-dynamics-in-the-rat-nucleus-accumbens
#4
Alex L Deal, Joanne K Konstantopoulos, Jeff L Weiner, Evgeny A Budygin
The current study aimed to explore how presynaptic dopamine (DA) function is altered following brief stress episodes and chronic ethanol self-administration and whether these neuroadaptations modify the acute effects of ethanol on DA dynamics. We used fast-scan cyclic voltammetry to evaluate changes in DA release and uptake parameters in rat nucleus accumbens brain slices by analyzing DA transients evoked through single pulse electrical stimulation. Adult male rats were divided into four groups: ethanol-naïve or ethanol drinking (six week intermittent two-bottle choice) and stressed (mild social defeat) or nonstressed...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29317777/a-kinase-anchoring-protein-150-akap150-promotes-cocaine-reinstatement-by-increasing-ampa-receptor-transmission-in-the-accumbens-shell
#5
Leonardo A Guercio, Mackenzie E Hofmann, Sarah E Swinford-Jackson, Julia S Sigman, Mathieu E Wimmer, Mark L Dell'Acqua, Heath D Schmidt, R Christopher Pierce
Previous work indicated that activation of D1-like dopamine receptors (D1DRs) in the nucleus accumbens shell promoted cocaine seeking through a process involving the activation of PKA and GluA1-containing AMPA receptors (AMPARs). A-kinase anchoring proteins (AKAPs) localize PKA to AMPARs leading to enhanced phosphorylation of GluA1. AKAP150, the most well-characterized isoform, plays an important role in several forms of neuronal plasticity. However, its involvement in drug addiction has been minimally explored...
December 12, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29317484/chemogenetic-excitation-of-accumbens-projecting-infralimbic-cortical-neurons-blocks-toluene-induced-conditioned-place-preference
#6
Wesley N Wayman, John J Woodward
Abuse rates for inhalants among adolescents continue to be high, yet preclinical models for studying mechanisms underlying inhalant abuse remain limited. Our lab has previously shown that, in male rats, an acute binge-like exposure to toluene vapor that mimics human solvent abuse modifies the intrinsic excitability of medial prefrontal cortex (mPFC) pyramidal neurons projecting to the nucleus accumbens (NAc). These changes showed region (infralimbic; IL vs. prelimbic; PRL), layer (shallow; 2/3 vs. deep; 5/6), target (core vs...
January 9, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29313985/cart-peptide-in-the-nucleus-accumbens-shell-inhibits-cocaine-induced-locomotor-sensitization-to-transient-overexpression-of-%C3%AE-ca2-calmodulin-dependent-protein-kinase-ii
#7
Lixia Xiong, Qing Meng, Xi Sun, Xiangtong Lu, Qiang Fu, Qinghua Peng, Jianhua Yang, Ki-Wan Oh, Zhen Zhen Hu
Cocaine- and amphetamine-regulated transcript (CART) peptide is a widely distributed neurotransmitter that attenuates cocaine-induced locomotor activity when injected into the nucleus accumbens (NAc). Our previous work first confirmed that the inhibitory mechanism of the CART peptide on cocaine-induced locomotor activity is related to a reduction in cocaine-enhanced phosphorylated Ca2+ /calmodulin-dependent protein kinaseIIα (pCaMKIIα) and the enhancement of cocaine-induced D3R function. The present study investigated whether CART peptide inhibited cocaine-induced locomotor activity via inhibition of interactions between pCaMKIIα and the D3 dopamine receptor (D3R)...
January 4, 2018: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29313212/hyperbaric-oxygen-attenuates-withdrawal-symptoms-by-regulating-monoaminergic-neurotransmitters-and-no-signaling-pathway-at-nucleus-accumbens-in-morphine-dependent-rats
#8
Chunxia Chen, Qiuping Fan, Zhihuan Nong, Wan Chen, Yaoxuan Li, Luying Huang, Daorong Feng, Xiaorong Pan, Shengyong Lan
In this study, we examined whether hyperbaric oxygen (HBO2) plays a detoxification role in withdrawal symptoms in a morphine-dependent rat model. The model was established through injections of morphine at increasing doses for 7 days. Withdrawal symptoms were induced by naloxone injection on the 8th day. The detoxification effect of HBO2 was evaluated using the withdrawal symptom scores, biochemical indices and neurotransmitters. Compared with the model group, HBO2 therapy significantly attenuated the withdrawal symptom scores, body weight loss and the level of norepinephrine level, whereas it increased the dopamine level and tyrosine hydroxylase expression in the nucleus accumbens...
January 8, 2018: Neurochemical Research
https://www.readbyqxmd.com/read/29289614/sexual-odor-preference-and-dopamine-release-in-the-nucleus-accumbens-by-estrous-olfactory-cues-in-sexually-na%C3%A3-ve-and-experienced-male-rats
#9
Masaya Fujiwara, Atsuhiko Chiba
Sexual behavior is a natural reward that activates mesolimbic dopaminergic system. Microdialysis studies have shown that extracellular level of dopamine (DA) in the nucleus accumbens (NAcc) significantly increases during copulation in male rats. The NAcc DA level is also known to be increased during the presentation of a sexually receptive female before mating. This rise in DA was probably associated with sexual motivation elicited by incentive stimuli from the receptive female. These microdialysis studies, however, did not thoroughly investigated if olfactory stimuli from estrous females could significantly increase the extracellular DA in the NAcc of male rats...
December 28, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/29276735/circuit-and-synaptic-mechanisms-of-repeated-stress-perspectives-from-differing-contexts-duration-and-development
#10
REVIEW
Kevin G Bath, Scott J Russo, Kristen E Pleil, Eric S Wohleb, Ronald S Duman, Jason J Radley
The current review is meant to synthesize research presented as part of a symposium at the 2016 Neurobiology of Stress workshop in Irvine California. The focus of the symposium was "Stress and the Synapse: New Concepts and Methods" and featured the work of several junior investigators. The presentations focused on the impact of various forms of stress (altered maternal care, binge alcohol drinking, chronic social defeat, and chronic unpredictable stress) on synaptic function, neurodevelopment, and behavioral outcomes...
December 2017: Neurobiology of Stress
https://www.readbyqxmd.com/read/29274878/immunochemical-analysis-of-the-expression-of-sv2c-in-mouse-macaque-and-human-brain
#11
Amy R Dunn, Carlie A Hoffman, Kristen A Stout, Minagi Ozawa, Rohan K Dhamsania, Gary W Miller
The synaptic vesicle glycoprotein 2C (SV2C) is an undercharacterized protein with enriched expression in phylogenetically old brain regions. Its precise role within the brain is unclear, though various lines of evidence suggest that SV2C is involved in the function of synaptic vesicles through the regulation of vesicular trafficking, calcium-induced exocytosis, or synaptotagmin function. SV2C has been linked to multiple neurological disorders, including Parkinson's disease and psychiatric conditions. SV2C is expressed in various cell types-primarily dopaminergic, GABAergic, and cholinergic cells...
December 21, 2017: Brain Research
https://www.readbyqxmd.com/read/29246771/antagonism-of-the-d1-and-d2-like-dopamine-receptors-in-the-nucleus-accumbens-attenuates-forced-swim-stress-and-morphine-priming-induced-reinstatement-of-extinguished-rats
#12
Zahra Farzinpour, Zahra Mousavi, Saeideh Karimi-Haghighi, Abbas Haghparast
Dopaminergic pathways from the ventral tegmental area (VTA) to the nucleus accumbens (NAc) play a critical role in reward-related phenomena as well as in the reinstatement of drug-seeking behavior. Stress is a major trigger for inducing reinstatement, however, the interaction between stress and the dopaminergic system is not well known. The present study was undertaken to investigate the effect of D1- and D2-like dopamine receptors within the NAc in forced swim stress (FSS)- and priming-induced reinstatement of morphine-seeking behaviors...
December 12, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/29246683/optogenetic-activation-of-granule-cells-in-the-dorsal-dentate-gyrus-enhances-dopaminergic-neurotransmission-in-the-nucleus-accumbens
#13
Laurent Tritschler, Mazen A Kheirbek, Yannick Le Dantec, Indira Mendez-David, Jean-Philippe Guilloux, Charlène Faye, Julie Doan, Thu-Ha Pham, René Hen, Denis J David, Alain M Gardier
The dentate gyrus (DG) has distinct roles along its dorso-ventral axis. In the mouse, we recently demonstrated that dorsal DG (dDG) stimulation enhances exploratory behavior (Kheirbek et al., 2013). Dopamine (DA) release in the Nucleus Accumbens (NAcc), which belongs to the reward system, could be a key target of dDG mediating this motivation-related behavior. Here, an optogenetic stimulation of either ventral (vDG) or dDG granule cells was coupled with NAcc DA release monitoring using in vivo microdialysis...
December 12, 2017: Neuroscience Research
https://www.readbyqxmd.com/read/29242988/anabolic-androgenic-steroids-aas-increase-sensitivity-to-uncertainty-by-inhibition-of-dopamine-d1-and-d2-receptors
#14
Kathryn G Wallin-Miller, Frida Kreutz, Grace Li, Ruth I Wood
BACKGROUND: Anabolic-androgenic steroid abuse is implicated in maladaptive behaviors such as impaired cognition in humans. In a rat model, our lab has shown that testosterone decreases preference for a large/uncertain reward in probability discounting. Other studies have shown that androgens decrease dopamine D1 and D2 receptors in the nucleus accumbens shell, a region important for decision-making behavior in probability discounting. Thus, we attempted to restore selection of the large/uncertain reward in testosterone-treated rats by administering the D2 receptor agonist quinpirole or the D1 receptor agonist SKF81297 and testing probability discounting...
December 14, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/29241537/nucleus-accumbens-dopamine-signaling-regulates-sexual-preference-for-females-in-male-mice
#15
Yamit Beny-Shefer, Noga Zilkha, Yael Lavi-Avnon, Nadav Bezalel, Ilana Rogachev, Alexander Brandis, Molly Dayan, Tali Kimchi
Sexual preference for the opposite sex is a fundamental behavior underlying reproductive success, but the neural mechanisms remain unclear. Here, we examined the role of dopamine signaling in the nucleus accumbens core (NAcc) in governing chemosensory-mediated preference for females in TrpC2-/- and wild-type male mice. TrpC2-/- males, deficient in VNO-mediated signaling, do not display mating or olfactory preference toward females. We found that, during social interaction with females, TrpC2-/- males do not show increased NAcc dopamine levels, observed in wild-type males...
December 12, 2017: Cell Reports
https://www.readbyqxmd.com/read/29239776/differential-release-of-dopamine-in-the-nucleus-accumbens-evoked-by-low-versus-high-frequency-medial-prefrontal-cortex-stimulation
#16
Daniel F Hill, Kate L Parent, Christopher W Atcherley, Stephen L Cowen, Michael L Heien
The medial prefrontal cortex (mPFC) coordinates goal-directed behaviors, which may be mediated through mPFC regulation of dopamine release in the nucleus accumbens (NAc). Furthermore, frequency-specific oscillatory activity between the frontal cortex and downstream structures may facilitate inter-region communication. Although high-frequency (e.g., 60 Hz) mPFC stimulation is known to increase basal dopamine levels in the NAc, little is known about how phasic dopamine release is affected by mPFC stimulation...
November 15, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/29229557/%C3%AE-1b-adrenergic-receptor-localization-and-relationship-to-the-d1-dopamine-receptor-in-the-rat-nucleus-accumbens
#17
Darlene A Mitrano, Kelsey Jackson, Samantha Finley, Allison Seeley
The α1-adrenergic receptors (α1ARs) have been implicated in numerous actions of the brain, including attention and wakefulness. Additionally, they have been identified as contributing to disorders of the brain, such as drug addiction, and recent work has shown a role of these receptors in relapse to psychostimulants. While some functionality is known, the actual subcellular localization of the subtypes of the α1ARs remains to be elucidated. Further, their anatomical relationship to receptors for other neurotransmitters, such as dopamine (DA), remains unclear...
December 8, 2017: Neuroscience
https://www.readbyqxmd.com/read/29226617/activation-of-glucagon-like-peptide-1-receptors-in-the-nucleus-accumbens-attenuates-cocaine-seeking-in-rats
#18
Nicole S Hernandez, Bernadette O'Donovan, Pavel I Ortinski, Heath D Schmidt
Recent evidence indicates that activation of glucagon-like peptide-1 (GLP-1) receptors reduces cocaine-mediated behaviors and cocaine-evoked dopamine release in the nucleus accumbens (NAc). However, no studies have examined the role of NAc GLP-1 receptors in the reinstatement of cocaine-seeking behavior, an animal model of relapse. Here, we show that systemic infusion of a behaviorally relevant dose of the GLP-1 receptor agonist exendin-4 penetrated the brain and localized with neurons and astrocytes in the NAc...
December 11, 2017: Addiction Biology
https://www.readbyqxmd.com/read/29225042/endogenous-dopamine-and-endocannabinoid-signaling-mediate-cocaine-induced-reversal-of-ampar-synaptic-potentiation-in-the-nucleus-accumbens-shell
#19
Anna E Ingebretson, Matthew C Hearing, Ethan D Huffington, Mark J Thomas
Repeated exposure to drugs of abuse alters the structure and function of neural circuits mediating reward, generating maladaptive plasticity in circuits critical for motivated behavior. Within meso-corticolimbic dopamine circuitry, repeated exposure to cocaine induces progressive alterations in AMPAR-mediated glutamatergic synaptic transmission. During a 10-14 day period of abstinence from cocaine, AMPAR signaling is potentiated at synapses on nucleus accumbens (NAc) medium spiny neurons (MSNs), promoting a state of heightened synaptic excitability...
December 7, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29222936/role-of-central-oxytocin-and-dopamine-systems-in-nociception-and-their-possible-interactions-suggested-hypotheses
#20
Mohammed Gamal-Eltrabily, Alfredo Manzano-García
Central oxytocin and dopamine have an important role in the process of nociception at the spinal level as well as supraspinal structures, e.g. anterior cingulate cortex, insular cortex, amygdala, nucleus accumbens, and hypothalamus. Many studies have pointed out the importance of both systems in the pain descending modulatory system and in pain-related symptoms in some chronic disorders, e.g. Parkinson disease and fibromyalgia. The interaction between oxytocin and dopamine systems has been addressed in some motivational behaviors, e...
December 9, 2017: Reviews in the Neurosciences
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