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Dopamine reuptake

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https://www.readbyqxmd.com/read/29033793/from-serotonin-to-neuroplasticity-evolvement-of-theories-for-major-depressive-disorder
#1
REVIEW
Bangshan Liu, Jin Liu, Mi Wang, Yan Zhang, Lingjiang Li
The serotonin (5-HT) hypothesis of depression has played an important role in the history of psychiatry, yet it has also been criticized for the delayed onset and inadequate efficacy of selective serotonin reuptake inhibitors (SSRIs). With evolvement of neuroscience, the neuroplasticity hypothesis of major depressive disorder (MDD) has been proposed and may provide a better framework for clarification the pathogenesis of MDD and antidepressant efficacy. In this article, we first summarized the evidence challenging the monoamine hypothesis and proposed that the antidepressant efficacy of SSRIs is not derived from elevated monoamine (5-HT, noradrenaline (NE), or dopamine (DA)) concentration or monoamine neurotransmission...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/29029252/time-on-task-effect-during-sleep-deprivation-in-healthy-young-adults-is-modulated-by-dopamine-transporter-genotype
#2
Brieann C Satterfield, Jonathan P Wisor, Michelle A Schmidt, Hans P A Van Dongen
Study Objectives: The time-on-task (TOT) effect and total sleep deprivation (TSD) have similar effects on neurobehavioral functioning, including increased performance instability during tasks requiring sustained attention. The TOT effect is exacerbated by TSD, suggesting potentially overlapping mechanisms. We probed these mechanisms by investigating genotype-phenotype relationships on psychomotor vigilance test (PVT) performance for three a-priori selected genes previously linked to the TOT effect and/or TSD: DAT1, COMT, and TNFα...
October 4, 2017: Sleep
https://www.readbyqxmd.com/read/28994779/assessment-of-dopaminergic-homeostasis-in-mice-by-use-of-high-performance-liquid-chromatography-analysis-and-synaptosomal-dopamine-uptake
#3
Kathrine L Jensen, Annika H Runegaard, Pia Weikop, Ulrik Gether, Mattias Rickhag
Dopamine (DA) is a modulatory neurotransmitter controlling motor activity, reward processes and cognitive function. Impairment of dopaminergic (DAergic) neurotransmission is strongly associated with several central nervous system-associated diseases such as Parkinson's disease, attention-deficit-hyperactivity disorder and drug addiction(1)(,)(2)(,)(3)(,)(4). Delineating disease mechanisms involving DA imbalance is critically dependent on animal models to mimic aspects of the diseases, and thus protocols that assess specific parts of the DA homeostasis are important to provide novel insights and possible therapeutic targets for these diseases...
September 21, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28963530/super-resolution-microscopy-reveals-functional-organization-of-dopamine-transporters-into-cholesterol-and-neuronal-activity-dependent-nanodomains
#4
Troels Rahbek-Clemmensen, Matthew D Lycas, Simon Erlendsson, Jacob Eriksen, Mia Apuschkin, Frederik Vilhardt, Trine N Jørgensen, Freja H Hansen, Ulrik Gether
Dopamine regulates reward, cognition, and locomotor functions. By mediating rapid reuptake of extracellular dopamine, the dopamine transporter is critical for spatiotemporal control of dopaminergic neurotransmission. Here, we use super-resolution imaging to show that the dopamine transporter is dynamically sequestrated into cholesterol-dependent nanodomains in the plasma membrane of presynaptic varicosities and neuronal projections of dopaminergic neurons. Stochastic optical reconstruction microscopy reveals irregular dopamine transporter nanodomains (∼70 nm mean diameter) that were highly sensitive to cholesterol depletion...
September 29, 2017: Nature Communications
https://www.readbyqxmd.com/read/28953050/repeated-administration-of-amitriptyline-in-neuropathic-pain-modulation-of-the-noradrenergic-descending-inhibitory-system
#5
Tadanao Hiroki, Takashi Suto, Shigeru Saito, Hideaki Obata
BACKGROUND: The tricyclic antidepressant amitriptyline, the serotonin and noradrenaline reuptake inhibitor duloxetine, and gabapentinoids are first-line drugs for treatment of neuropathic pain. The analgesic effect of these drugs relates to brainstem-spinal descending noradrenergic systems. However, amitriptyline utilizes a variety of mechanisms for analgesia in neuropathic pain, and it is unclear which mechanism is most important. In the present study, we investigated the role of descending noradrenergic systems in the analgesic effect of these drugs for treatment of neuropathic pain...
August 4, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28944316/relationship-between-anti-depressant-use-and-lung-cancer-survival
#6
Adriana Zingone, Derek Brown, Elise D Bowman, Oscar Vidal, Julien Sage, Joel Neal, Bríd M Ryan
OBJECTIVES: In recent years, the anti-cancer properties of several commonly used drugs have been explored, with drugs such as aspirin and beta-blockers associated with improved cancer outcomes. Previous preclinical work demonstrated that tricyclic anti-depressants have antitumor efficacy in lung cancer. Our goal was to examine the association between anti-depressant use and survival in lung cancer. MATERIALS AND METHODS: We examined the association between use of common anti-depressants and survival in 1,097 lung cancer patients from the NCI-Maryland lung cancer study...
2017: Cancer Treat Res Commun
https://www.readbyqxmd.com/read/28939767/dopamine-transporter-phosphorylation-site-threonine-53-is-stimulated-by-amphetamines-and-regulates-dopamine-transport-efflux-and-cocaine-analog-binding
#7
Sathya Challasivakanaka, Juan Zhen, Margaret E Smith, Maarten E A Reith, James D Foster, Roxanne A Vaughan
The dopamine transporter (DAT) controls the spatial and temporal dynamics of dopamine neurotransmission through reuptake of extracellular transmitter and is a target for addictive compounds such as cocaine, amphetamine (AMPH), and methamphetamine (METH). Reuptake is regulated by kinase pathways and drug exposure, allowing for fine-tuning of clearance in response to specific conditions, and here we examine the impact of transporter ligands on DAT residue Thr53, a proline-directed phosphorylation site previously implicated in AMPH-stimulated efflux mechanisms...
September 22, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28921596/single-cocaine-exposure-does-not-alter-striatal-presynaptic-dopamine-function-in-mice-an-18-f-fdopa-pet-study
#8
D R Bonsall, M Kokkinou, M Veronese, C Coello, L A Wells, O D Howes
Cocaine is a recreational drug of abuse that binds to the dopamine transporter (DAT), preventing reuptake of dopamine into presynaptic terminals. The increased presence of synaptic dopamine results in stimulation of both pre- and postsynaptic dopamine receptors, considered an important mechanism by which cocaine elicits its reinforcing properties. However, the effects of acute cocaine administration on presynaptic dopamine function remain unclear. Non-invasive imaging techniques such as positron emission tomography (PET) have revealed impaired presynaptic dopamine function in chronic cocaine users...
September 18, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28919062/progress-and-challenges-in-anti-obesity-pharmacotherapy
#9
REVIEW
Daniel H Bessesen, Luc F Van Gaal
Obesity is a serious and growing worldwide health challenge. Healthy lifestyle choices are the foundation of obesity treatment. However, weight loss can lead to physiological adaptations that promote weight regain. As a result, lifestyle treatment alone typically produces only modest weight loss that is difficult to sustain. In other metabolic diseases, pharmacotherapy is an accepted adjunct to lifestyle. Several anti-obesity drugs have been approved in the USA, European Union, Australia, and Japan including sympathomimetics, pancreatic lipase inhibitors, GABAA receptor activators, a serotonin 2C receptor agonist, opioid antagonist, dopamine-norepinephrine reuptake inhibitor, and glucagon-like peptide-1 (GLP-1) receptor agonists...
September 14, 2017: Lancet Diabetes & Endocrinology
https://www.readbyqxmd.com/read/28905875/structural-and-functional-characterization-of-the-interaction-of-snapin-with-the-dopamine-transporter-differential-modulation-of-psychostimulant-actions
#10
Amaia M Erdozain, Stéphanie De Gois, Véronique Bernard, Victor Gorgievski, Nicolas Pietrancosta, Sylvie Dumas, Carlos E Macedo, Peter Vanhoutte, Jorge E Ortega, J Javier Meana, Eleni T Tzavara, Vincent Vialou, Bruno Giros
The importance of dopamine (DA) neurotransmission is emphasized by its direct implication in several neurological and psychiatric disorders. The DA transporter (DAT), target of psychostimulant drugs, is the key protein that regulates spatial and temporal activity of DA in the synaptic cleft via the rapid reuptake of DA into the presynaptic terminal. There is strong evidence suggesting that DAT-interacting proteins may have a role in its function and regulation. Performing a two-hybrid screening, we identified snapin, a SNARE-associated protein implicated in synaptic transmission, as a new binding partner of the carboxyl terminal of DAT...
September 14, 2017: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28904985/cholinergic-activity-and-levodopa-induced-dyskinesia-a-multitracer-molecular-imaging-study
#11
Joachim Brumberg, Sebastian Küsters, Ehab Al-Momani, Giorgio Marotta, Kelly P Cosgrove, Christopher H van Dyck, Ken Herrmann, György A Homola, Gianni Pezzoli, Andreas K Buck, Jens Volkmann, Samuel Samnick, Ioannis U Isaias
OBJECTIVE: To investigate the association between levodopa-induced dyskinesias and striatal cholinergic activity in patients with Parkinson's disease. METHODS: This study included 13 Parkinson's disease patients with peak-of-dose levodopa-induced dyskinesias, 12 nondyskinetic patients, and 12 healthy controls. Participants underwent 5-[(123)I]iodo-3-[2(S)-2-azetidinylmethoxy]pyridine single-photon emission computed tomography, a marker of nicotinic acetylcholine receptors, [(123)I]N-ω-fluoropropyl-2β-carbomethoxy-3β-(4-iodophenyl)nortropane single-photon emission computed tomography, to measure dopamine reuptake transporter density and 2-[(18)F]fluoro-2-deoxyglucose positron emission tomography to assess regional cerebral metabolic activity...
September 2017: Annals of Clinical and Translational Neurology
https://www.readbyqxmd.com/read/28887185/role-of-monoaminergic-systems-and-ambient-temperature-in-bath-salts-constituent-3-4-methylenedioxypyrovalerone-mdpv-elicited-hyperthermia-and-locomotor-stimulation-in-mice
#12
REVIEW
Brenda M Gannon, Adrian Williamson, Kenner C Rice, William E Fantegrossi
3,4-Methylenedioxypyrovalerone (MDPV) is a common constituent of illicit bath salts products, and in vitro studies implicate monoamine transporters as mediators of its pharmacological effects. Locomotor and thermoregulatory effects of MDPV depend on ambient temperature, so the current studies aimed to gauge the involvement of dopamine (DA), norepinephrine (NE), and serotonin (5-HT) in MDPV-induced locomotor stimulation and hyperthermia in the mouse at different ambient temperatures. Mice were pretreated with the selective 5-HT-reuptake inhibitor fluoxetine (3 mg/kg), the NE-reuptake inhibitor desipramine (3 mg/kg), the DA-reuptake inhibitor bupropion (10 mg/kg), or saline, followed by 10 mg/kg MDPV while thermoregulation and locomotor activity were monitored via radiotelemetry...
September 5, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28881483/meta-analysis-risk-of-hyperhidrosis-with-second-generation-antidepressants
#13
Chad Beyer, Kiley Cappetta, Jessica A Johnson, Michael H Bloch
BACKGROUND: Our goal was to quantify the risk of hyperhidrosis associated with commonly used antidepressant agents and examine the impact of medication class, pharmacodynamics, and dose on risk of hyperhidrosis. METHODS: We conducted a PubMed search to identify all double-blind, randomized, placebo-controlled trials examining the efficacy of second-generation antidepressant medications in the treatment of adults with a depressive disorder, anxiety disorders, or obsessive-compulsive disorder...
September 7, 2017: Depression and Anxiety
https://www.readbyqxmd.com/read/28864865/the-effect-of-single-dose-methylphenidate-on-the-rate-of-error-driven-learning-in-healthy-males-a-randomized-controlled-trial
#14
Jonathon R Howlett, He Huang, Cédric M Hysek, Martin P Paulus
RATIONALE AND OBJECTIVES: Norepinephrine mediates the adjustment of error-driven learning to match the rate of change of the environment, while phasic dopamine signals prediction errors. We tested the hypothesis that pharmacologic manipulation may modulate this process. METHODS: We administered a single dose of methylphenidate, a norepinephrine/dopamine reuptake inhibitor, or placebo in double-blind randomized fashion to 20 healthy human males, who then performed a probabilistic learning task...
September 1, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28859474/aggregated-single-walled-carbon-nanotubes-absorb-and-deform-dopamine-related-proteins-based-on-molecular-dynamics-simulations
#15
Yi Yu, Huiyong Sun, Keith Gilmore, Tingjun Hou, Suidong Wang, Youyong Li
Single-walled carbon nanotubes (SWCNTs) have attracted considerable attention owing to their applications in various fields such as biotechnology and biomedicine. Recently, aggregated SWCNTs have shown more significant effects on the treatment of methamphetamine addiction (Nat. Nanotech. 2016, 11, 613). However, the mechanisms underlying these actions are unclear. By using all-atom molecular dynamics simulations, we investigate the effects of single and aggregated SWCNTs (single-(10,10)CNT, aggregated-7-(10,10)CNTs, and single-(35,35)CNT with the same diameter as that of the aggregated one) on the activity of dopamine-related proteins [tyrosine hydroxylase (TyrOH) and dopamine transporter (DAT), which are related to the synthesis and transport of dopamine, respectively]...
September 27, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28842195/effects-of-a-combination-of-3-4-methylenedioxymeth-amphetamine-and-caffeine-on-real-time-stimulated-dopamine-release-in-the-rat-striatum-studies-using-fast-cyclic-voltammetry
#16
J J O'Connor, K M O'Boyle, J P Lowry
It is well documented that caffeine exacerbates the hyperthermia associated with acute exposure to 3,4-methylenedioxymethamphetamine (MDMA) in rats. Previous reports have also indicated that MDMA-related enhancement of dopamine release is exacerbated in the presence of caffeine. In the present study we have examined whether the effects of MDMA on real-time stimulated dopamine release in the absence of uptake inhibition are accentuated in the presence of caffeine. Isolated striatal slices from adult male Wistar rats were treated acutely with MDMA, caffeine, or a combination, and their effects on single and 5pulse stimulated dopamine release monitored using the technique of fast cyclic voltammetry...
August 22, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28811624/pupil-size-tracks-attentional-performance-in-attention-deficit-hyperactivity-disorder
#17
G Wainstein, D Rojas-Líbano, N A Crossley, X Carrasco, F Aboitiz, T Ossandón
Attention-deficit/hyperactivity disorder (ADHD) diagnosis is based on reported symptoms, which carries the potential risk of over- or under-diagnosis. A biological marker that helps to objectively define the disorder, providing information about its pathophysiology, is needed. A promising marker of cognitive states in humans is pupil size, which reflects the activity of an 'arousal' network, related to the norepinephrine system. We monitored pupil size from ADHD and control subjects, during a visuo-spatial working memory task...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807575/triple-reuptake-inhibitors-design-synthesis-and-structure-activity-relationship-of-benzylpiperidine-tetrazoles
#18
Suresh Paudel, Xiao Min, Srijan Acharya, Daulat Bikram Khadka, Goo Yoon, Kyeong-Man Kim, Seung Hoon Cheon
Monoamine transporters are important targets in the treatment of various central nervous disorders. Several limitations of traditional reuptake inhibitors, like delayed onset of action, insomnia, and sexual dysfunction, have compelled the search for safer, more effective compounds. In this study, we have sought to identify novel monoamine reuptake inhibitors. Based upon the docking study of compounds that we had reported previously, aromatic rings (A1) were modified to generate a novel series of benzylpiperidine-tetrazoles...
July 27, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28797665/functionalized-polymer-monoliths-with-carbamylated-amylose-for-the-enantioselective-reversed-phase-nano-liquid-chromatographic-separation-of-a-set-of-racemic-pharmaceuticals
#19
Ali Fouad, Adel A Marzouk, Samy M Ibrahim, Sobhy M El-Adl, Ashraf Ghanem
Here we report the first encapsulation of three carbamylated amylose namely R-, S- and R/S-amylose 2,3(3,5-dimethylphenylcarbamate)-6-ethylphenylcarbamate in organic polymer monolith in situ capillary columns. The columns were investigated for the enantioselective nano-liquid chromatographic separation of a set of racemic pharmaceuticals, namely, α- and β-blockers, anti-inflammatory drugs, antifungal drugs, norepinephrine-dopamine reuptake inhibitors, catecholamines, sedative hypnotics, antihistaminics, anticancer drugs, and antiarrhythmic drugs...
July 23, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28774856/modafinil-improves-attentional-performance-in-healthy-non-sleep-deprived-humans-at-doses-not-inducing-hyperarousal-across-species
#20
Zackary A Cope, Arpi Minassian, Dustin Kreitner, David A MacQueen, Morgane Milienne-Petiot, Mark A Geyer, William Perry, Jared W Young
The wake-promoting drug modafinil is frequently used off-label to improve cognition in psychiatric and academic populations alike. The domain-specific attentional benefits of modafinil have yet to be quantified objectively in healthy human volunteers using tasks validated for comparison across species. Further, given that modafinil is a low-affinity inhibitor for the dopamine and norepinephrine transporters (DAT/NET respectively) it is unclear if any effects are attributable to a non-specific increase in arousal, a feature of many catecholamine reuptake inhibitors (e...
October 2017: Neuropharmacology
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