keyword
MENU ▼
Read by QxMD icon Read
search

mesolimbic

keyword
https://www.readbyqxmd.com/read/29776015/delta-9-tetrahydrocannabinol-potentiates-fear-memory-salience-through-functional-modulation-of-mesolimbic-dopaminergic-activity-states
#1
Aurelie Fitoussi, Jordan Zunder, Huibing Tan, Steven R Laviolette
Chronic or acute exposure to delta-9-tetrahydrocannabinol (THC), the main psychoactive compound in cannabis, has been associated with numerous neuropsychiatric side-effects, including dysregulation of emotional processing and associative memory formation. Clinical and pre-clinical evidence suggests that the effects of THC are due to the ability to modulate mesolimbic dopamine (DA) activity states in the nucleus accumbens (NAc) and ventral tegmental area (VTA). Nevertheless, the mechanisms by which THC modulates mesolimbic DA function and emotional processing are not well understood...
May 18, 2018: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29751228/prenatal-nicotine-exposure-alters-postsynaptic-ampa-receptors-and-glutamate-neurotransmission-within-the-laterodorsal-tegmentum-ldt-of-juvenile-mice
#2
Filip S Polli, Kristi A Kohlmeier
Despite dissemination of information regarding the harm on fetal development of smoking while pregnant, the number of pregnancies associated with nicotine exposure appears to have stagnated. Presence of nicotine during neural formulation is associated with a higher susceptibility of drug dependence, suggesting an altered development of neurons in circuits involved in saliency and motivation. The laterodorsal tegmental nucleus (LDT) plays a role in coding stimuli valence via afferents to mesolimbic nuclei. Accordingly, alterations in development of neural mechanisms in the LDT could be involved in vulnerability to drug dependency...
April 25, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29740595/dynamic-encoding-of-incentive-salience-in-the-ventral-pallidum-dependence-on-the-form-of-the-reward-cue
#3
Allison M Ahrens, Lindsay M Ferguson, Terry E Robinson, J Wayne Aldridge
Some rats are especially prone to attribute incentive salience to a cue (conditioned stimulus, CS) paired with food reward (sign-trackers, STs), but the extent they do so varies as a function of the form of the CS. Other rats respond primarily to the predictive value of a cue (goal-trackers, GTs), regardless of its form. Sign-tracking is associated with greater cue-induced activation of mesolimbic structures than goal-tracking; however, it is unclear how the form of the CS itself influences activity in neural systems involved in incentive salience attribution...
March 2018: ENeuro
https://www.readbyqxmd.com/read/29740277/hedonic-eating-and-the-delicious-circle-from-lipid-derived-mediators-to-brain-dopamine-and-back
#4
REVIEW
Roberto Coccurello, Mauro Maccarrone
Palatable food can be seductive and hedonic eating can become irresistible beyond hunger and negative consequences. This is witnessed by the subtle equilibrium between eating to provide energy intake for homeostatic functions, and reward-induced overeating. In recent years, considerable efforts have been devoted to study neural circuits, and to identify potential factors responsible for the derangement of homeostatic eating toward hedonic eating and addiction-like feeding behavior. Here, we examined recent literature on "old" and "new" players accountable for reward-induced overeating and possible liability to eating addiction...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29723641/contributions-of-dopaminergic-and-non-dopaminergic-neurons-to-vta-stimulation-induced-neurovascular-responses-in-brain-reward-circuits
#5
Marta Brocka, Cornelia Helbing, Daniel Vincenz, Thomas Scherf, Dirk Montag, Jürgen Goldschmidt, Frank Angenstein, Michael Lippert
Mapping the activity of the human mesolimbic dopamine system by BOLD-fMRI is a tempting approach to non-invasively study the action of the brain reward system during different experimental conditions. However, the contribution of dopamine release to the BOLD signal is disputed. To assign the actual contribution of dopaminergic and non-dopaminergic VTA neurons to the formation of BOLD responses in target regions of the mesolimbic system, we used two optogenetic approaches in rats. We either activated VTA dopaminergic neurons selectively, or dopaminergic and mainly glutamatergic projecting neurons together...
April 30, 2018: NeuroImage
https://www.readbyqxmd.com/read/29698491/brief-exposure-to-obesogenic-diet-disrupts-brain-dopamine-networks
#6
Robert L Barry, Nellie E Byun, Jason M Williams, Michael A Siuta, Mohammed N Tantawy, Nicole K Speed, Christine Saunders, Aurelio Galli, Kevin D Niswender, Malcolm J Avison
OBJECTIVE: We have previously demonstrated that insulin signaling, through the downstream signaling kinase Akt, is a potent modulator of dopamine transporter (DAT) activity, which fine-tunes dopamine (DA) signaling at the synapse. This suggests a mechanism by which impaired neuronal insulin receptor signaling, a hallmark of diet-induced obesity, may contribute to impaired DA transmission. We tested whether a short-term (two-week) obesogenic high-fat (HF) diet could reduce striatal Akt activity, a marker of central insulin, receptor signaling and blunt striatal and dopaminergic network responsiveness to amphetamine (AMPH)...
2018: PloS One
https://www.readbyqxmd.com/read/29689344/the-relationship-between-interleukin-6-and-functional-connectivity-in-methamphetamine-users
#7
Milky Kohno, Jennifer M Loftis, Marilyn Huckans, Laura E Dennis, Holly McCready, William F Hoffman
Methamphetamine (MA) causes an increase in pro-inflammatory cytokines in animal models and in humans. Resulting activation of microglia and neuro-inflammation could, via effects on reward networks, mediate behavioral characteristics of addiction. We examined the relationship between interleukin-6 (IL-6) and corticolimbic and striatolimbic resting-state functional connectivity (RSFC). Thirty adults diagnosed with MA dependence and 20 control subjects underwent a resting-state functional magnetic resonance imaging (fMRI) scan and gave a blood sample for determination of plasma IL-6 levels...
April 21, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29688082/evidence-of-a-diurnal-rhythm-in-implicit-reward-learning
#8
Alexis E Whitton, Malavika Mehta, Manon L Ironside, Greg Murray, Diego A Pizzagalli
Many aspects of hedonic behavior, including self-administration of natural and drug rewards, as well as human positive affect, follow a diurnal cycle that peaks during the species-specific active period. This variation has been linked to circadian modulation of the mesolimbic dopamine system, and is hypothesized to serve an adaptive function by driving an organism to engage with the environment during times where the opportunity for obtaining rewards is high. However, relatively little is known about whether more complex facets of hedonic behavior - in particular, reward learning - follow the same diurnal cycle...
April 24, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29687649/neural-food-reward-processing-in-successful-and-unsuccessful-weight-maintenance
#9
Joe J Simon, Alexandra Becker, Maria Hamze Sinno, Mandy Skunde, Martin Bendszus, Hubert Preissl, Paul Enck, Wolfgang Herzog, Hans-Christoph Friederich
OBJECTIVE: Weight loss maintenance is one of the biggest challenges in behavioral weight loss programs. The present study aimed to examine metabolic influences on the mesolimbic reward system in people with successful and unsuccessful long-term weight loss maintenance. METHODS: Thirty-three women with obesity at least 6 months after the completion of a diet were recruited: seventeen women were able to maintain their weight loss, whereas sixteen showed weight regain...
May 2018: Obesity
https://www.readbyqxmd.com/read/29681856/trace-amine-associated-receptor-1-modulates-the-locomotor-and-sensitization-effects-of-nicotine
#10
Ilya Sukhanov, Mariia Dorofeikova, Antonina Dolgorukova, Artem Dorotenko, Raul R Gainetdinov
Trace amine-associated receptor 1 (TAAR1) has emerged as a promising target for addiction treatments because it affects dopamine transmission in the mesolimbic pathway. TAAR1 is involved in the effects of addictive drugs, such as amphetamines, cocaine and ethanol, but the impact of TAAR1 on the effects of nicotine, the psychoactive drug responsible for the development and maintenance of tobacco smoking, has not yet been studied. This study was performed to investigate the possible modulatory action of TAAR1 on the effects of nicotine on locomotor behaviors in rats and mice...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29656874/regional-heterogeneity-of-d2-receptor-signaling-in-the-dorsal-striatum-and-nucleus-accumbens
#11
Pamela F Marcott, Sheng Gong, Prashant Donthamsetti, Steven G Grinnell, Melissa N Nelson, Amy H Newman, Lutz Birnbaumer, Kirill A Martemyanov, Jonathan A Javitch, Christopher P Ford
Dopamine input to the dorsal and ventral striatum originates from separate populations of midbrain neurons. Despite differences in afferent inputs and behavioral output, little is known about how dopamine release is encoded by dopamine receptors on medium spiny neurons (MSNs) across striatal subregions. Here we examined the activation of D2 receptors following the synaptic release of dopamine in the dorsal striatum (DStr) and nucleus accumbens (NAc) shell. We found that D2 receptor-mediated synaptic currents were slower in the NAc and this difference occurred at the level of D2-receptor signaling...
April 10, 2018: Neuron
https://www.readbyqxmd.com/read/29628879/dopamine-effort-based-choice-and-behavioral-economics-basic-and-translational-research
#12
REVIEW
John D Salamone, Merce Correa, Jen-Hau Yang, Renee Rotolo, Rose Presby
Operant behavior is not only regulated by factors related to the quality or quantity of reinforcement, but also by the work requirements inherent in performing instrumental actions. Moreover, organisms often make effort-related decisions involving economic choices such as cost/benefit analyses. Effort-based decision making is studied using behavioral procedures that offer choices between high-effort options leading to relatively preferred reinforcers vs. low effort/low reward choices. Several neural systems, including the mesolimbic dopamine (DA) system and other brain circuits, are involved in regulating effort-related aspects of motivation...
2018: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/29613999/exercise-reduces-dopamine-d1r-and-increases-d2r-in-rats-implications-for-addiction
#13
Lisa S Robison, Sabrina Swenson, John Hamilton, Panayotis K Thanos
INTRODUCTION: Exercise has been shown to be effective for preventing and treating substance abuse in both clinical and preclinical studies. Less is known, however, regarding the underlying neurobiological mechanisms driving these changes in drug-seeking behavior. One possibility is that exercise may alter the mesolimbic dopamine pathway in such a way that makes drugs of abuse less salient and/or rewarding. METHODS: To examine possible exercise-induced changes in dopamine signaling, male and female Lewis rats were split into exercise and sedentary groups at 8 weeks of age...
April 2, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29611323/leptin-attenuates-d-2-receptor-mediated-inhibition-of-putative-ventral-tegmental-area-dopaminergic-neurons
#14
Takami Murakami, Munechika Enjoji, Susumu Koyama
Obesity causes hyperleptinemia. We have previously shown that D2 receptor-mediated inhibition of ventral tegmental area (VTA) dopaminergic neurons is attenuated in diet-induced mice with obesity. Consequently, we hypothesized that high concentrations of serum leptin during obesity might modulate D2 receptor-mediated effects on VTA dopaminergic neurons. To investigate our hypothesis, we examined leptin effects on D2 receptor-mediated inhibition of putative VTA dopaminergic neurons from lean mice using electrophysiological techniques...
April 2018: Physiological Reports
https://www.readbyqxmd.com/read/29601300/cannabinoids-in-health-and-disease-pharmacological-potential-in-metabolic-syndrome-and-neuroinflammation
#15
REVIEW
Andrea Mastinu, Marika Premoli, Giulia Ferrari-Toninelli, Simone Tambaro, Giuseppina Maccarinelli, Maurizio Memo, Sara Anna Bonini
The use of different natural and/or synthetic preparations of Cannabis sativa is associated with therapeutic strategies for many diseases. Indeed, thanks to the widespread diffusion of the cannabinoidergic system in the brain and in the peripheral districts, its stimulation, or inhibition, regulates many pathophysiological phenomena. In particular, central activation of the cannabinoidergic system modulates the limbic and mesolimbic response which leads to food craving. Moreover, cannabinoid agonists are able to reduce inflammatory response...
March 30, 2018: Hormone Molecular Biology and Clinical Investigation
https://www.readbyqxmd.com/read/29599751/circadian-rhythms-and-clock-genes-in-reproduction-insights-from-behavior-and-the-female-rabbit-s-brain
#16
REVIEW
Mario Caba, Gabriela González-Mariscal, Enrique Meza
Clock gene oscillations are necessary for a successful pregnancy and parturition, but little is known about their function during lactation, a period demanding from the mother multiple physiological and behavioral adaptations to fulfill the requirements of the offspring. First, we will focus on circadian rhythms and clock genes in reproductive tissues mainly in rodents. Disruption of circadian rhythms or proper rhythmic oscillations of clock genes provoke reproductive problems, as found in clock gene knockout mice...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29593508/gabaergic-control-of-nigrostriatal-and-mesolimbic-dopamine-in-the-rat-brain
#17
Susanne Nikolaus, Hans-Jörg Wittsack, Markus Beu, Christina Antke, Maria A De Souza Silva, Frijthof Wickrath, Anja Müller-Lutz, Joseph P Huston, Gerald Antoch, Hans-Wilhelm Müller, Hubertus Hautzel
Purpose: The present study assessed the effects of the GABAA receptor (R) agonist muscimol (MUS), and the GABAA R antagonist bicuculline (BIC) on neocortical and subcortical radioligand binding to dopamine D2/3 Rs in relation to motor and exploratory behaviors in the rat. Methods: D2/3 R binding was measured with small animal SPECT in baseline and after challenge with either 1 mg/kg MUS or 1 mg/kg BIC, using [123 I]IBZM as radioligand. Motor/exploratory behaviors were assessed for 30 min in an open field prior to radioligand administration...
2018: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/29581536/neural-activation-to-monetary-reward-is-associated-with-amphetamine-reward-sensitivity
#18
Natania A Crane, Stephanie M Gorka, Jessica Weafer, Scott A Langenecker, Harriet de Wit, K Luan Phan
One known risk factor for drug use and abuse is sensitivity to rewarding effects of drugs. It is not known whether this risk factor extends to sensitivity to non-drug rewards. In this study with healthy young adults, we examined the association between sensitivity to the subjective rewarding effects of amphetamine and a neural indicator of anticipation of monetary reward. We hypothesized that greater euphorigenic response to amphetamine would be associated with greater neural activation to anticipation of monetary reward (Win > Loss)...
March 14, 2018: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29580892/cocaine-and-amphetamine-regulated-transcript-peptide-cart-induced-reward-behavior-is-mediated-via-g-i-o-dependent-phosphorylation-of-pka-erk-creb-pathway
#19
Amita R Somalwar, Amit G Choudhary, Pravesh R Sharma, Nagalakshmi B, Sneha Sagarkar, Amul J Sakharkar, Nishikant K Subhedar, Dadasaheb M Kokare
Although the role of cocaine- and amphetamine-regulated transcript peptide (CART) in modulating the mesolimbic reward pathway has been suggested, underlying cellular mechanisms have not been elucidated. Herein, we investigate the involvement of Gi/o dependent protein kinase A (PKA)/extracellular signal-regulated kinase (ERK)/cAMP response element binding protein (CREB) signaling in CART induced reward behavior. The rat was implanted with a stimulating electrode targeted at the lateral hypothalamus (LH)-medial forebrain bundle (MFB) and conditioned to intracranial self-stimulation (ICSS) in an operant chamber...
March 23, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29578032/ca-v-3-1-isoform-of-t-type-calcium-channels-supports-excitability-of-rat-and-mouse-ventral-tegmental-area-neurons
#20
Matthew E Tracy, Vesna Tesic, Tamara Timic Stamenic, Srdjan M Joksimovic, Nicolas Busquet, Vesna Jevtovic-Todorovic, Slobodan M Todorovic
Recent data have implicated voltage-gated calcium channels in the regulation of the excitability of neurons within the mesolimbic reward system. While the attention of most research has centered on high voltage L-type calcium channel activity, the presence and role of the low voltage-gated T-type calcium channel (T-channels) has not been well explored. Hence, we investigated T-channel properties in the neurons of the ventral tegmental area (VTA) utilizing wild-type (WT) rats and mice, CaV 3.1 knock-out (KO) mice, and TH-eGFP knock-in (KI) rats in acute horizontal brain slices of adolescent animals...
March 22, 2018: Neuropharmacology
keyword
keyword
37305
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"