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https://www.readbyqxmd.com/read/28343802/-the-effect-of-methylphenidate-on-appetite-and-weight
#1
R Bou Khalil, N Fares, Y Saliba, J Tamraz, S Richa
OBJECTIVES: To better delineate in the medical literature the effect of methylphenidate on weight and appetite. METHODS: A search on PubMed was carried out for articles published with no restrictions on language or year of publication using the terms: "methylphenidate"; "weight"; "appetite". RESULTS: Methylphenidate increases dopamine and noradrenaline in synapses because of its blockage of the transporters of these monoamines in the frontal cortex and insular lobe...
March 23, 2017: L'Encéphale
https://www.readbyqxmd.com/read/28341570/a-study-of-the-age-related-effects-of-lactational-atrazine-exposure
#2
Yan Sun, Yan-Shu Li, Bai Li, Kun Ma, Bai-Xiang Li
A growing number of reports have demonstrated that the widely-used herbicide Atrazine (ATR) can cause injury to dopamine (DA) neurons, but the exact mechanism remains unclear. In this study, we examined the effects of lactational ATR exposure in Sprague-Dawley rats on dopaminergic neuron health later in life. Compared with control rats, rats exposed to ATR during a critical period of neural development showed decreased striatal DA content and increased rates of DA turnover. The expression of Monoamine oxidase (MAO), which is associated with DA degradation, was up-regulated, and the expression of Vesicular Monoamine Transporter 2 (VMAT2), which is associated with DA transport, was down-regulated...
March 21, 2017: Reproductive Toxicology
https://www.readbyqxmd.com/read/28339776/effect-of-acute-millimeter-wave-exposure-on-dopamine-metabolism-of-ngf-treated-pc12-cells
#3
Alexis J Haas, Yann Le Page, Maxim Zhadobov, Ronan Sauleau, Yves Le Dréan, Christian Saligaut
Several forthcoming wireless telecommunication systems will use electromagnetic frequencies at millimeter waves (MMWs), and technologies developed around the 60-GHz band will soon know a widespread distribution. Free nerve endings within the skin have been suggested to be the targets of MMW therapy which has been used in the former Soviet Union. So far, no studies have assessed the impact of MMW exposure on neuronal metabolism. Here, we investigated the effects of a 24-h MMW exposure at 60.4 GHz, with an incident power density (IPD) of 5 mW/cm², on the dopaminergic turnover of NGF-treated PC12 cells...
February 24, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/28339403/dopamine-transporter-imaging-has-no-impact-on-functional-outcomes-in-de-novo-probable-parkinson-s-disease
#4
Patrick T Hickey, Maragatha Kuchibhatla, Burton Scott, Lisa Gauger, Mark A Stacy
BACKGROUND: Parkinson's disease (PD) is among the most prevalent neurodegenerative conditions. While motor and non-motor aspects of this disease have been well characterized, no objective biomarker exists to support an accurate clinical diagnosis. However, newer imaging techniques, including [123I]-FP-CIT (DaTSCAN), have demonstrated utility in differentiating between PD and non-neurodegenerative tremor disorders. OBJECTIVE: DaTSCAN has been primarily investigated in situations where diagnostic confusion exists, and in these instances has been shown to significantly impact clinical management...
March 20, 2017: Journal of Parkinson's Disease
https://www.readbyqxmd.com/read/28337537/is-prepulse-modification-altered-by-continuous-theta-burst-stimulation-dat1-genotype-and-motor-threshold-interact-on-prepulse-modification-following-brain-stimulation
#5
S Notzon, N Vennewald, A Gajewska, A L Klahn, J Diemer, B Winter, I Fohrbeck, V Arolt, P Pauli, K Domschke, P Zwanzger
Previous studies suggest an inhibitory top-down control of the amygdala by the prefrontal cortex (PFC). Both brain regions play a role in the modulation of prepulse modification (PPM) of the acoustic startle response by a pre-stimulus. Repetitive transcranial magnetic stimulation (rTMS) can modulate the activity of the PFC and might thus affect PPM. This study tested the effect of inhibitory rTMS on PPM accounting for a genetic variant of the dopamine transporter gene (DAT1). Healthy participants (N = 102) were stimulated with continuous theta burst stimulation (cTBS, an intense form of inhibitory rTMS) or sham treatment over the right PFC...
March 24, 2017: European Archives of Psychiatry and Clinical Neuroscience
https://www.readbyqxmd.com/read/28336296/serotonin-and-dopamine-transporter-pet-changes-in-the-premotor-phase-of-lrrk2-parkinsonism-cross-sectional-studies
#6
Daryl J Wile, Pankaj A Agarwal, Michael Schulzer, Edwin Mak, Katherine Dinelle, Elham Shahinfard, Nasim Vafai, Kazuko Hasegawa, Jing Zhang, Jessamyn McKenzie, Nicole Neilson, Audrey Strongosky, Ryan J Uitti, Mark Guttman, Cyrus P Zabetian, Yu-Shin Ding, Mike Adam, Jan Aasly, Zbigniew K Wszolek, Matthew Farrer, Vesna Sossi, A Jon Stoessl
BACKGROUND: People with Parkinson's disease can show premotor neurochemical changes in the dopaminergic and non-dopaminergic systems. Using PET, we assessed whether dopaminergic and serotonin transporter changes are similar in LRRK2 mutation carriers with Parkinson's disease and individuals with sporadic Parkinson's disease, and whether LRRK2 mutation carriers without motor symptoms show PET changes. METHODS: We did two cross-sectional PET studies at the Pacific Parkinson's Research Centre in Vancouver, BC, Canada...
March 20, 2017: Lancet Neurology
https://www.readbyqxmd.com/read/28332488/parkinson-disease
#7
REVIEW
Werner Poewe, Klaus Seppi, Caroline M Tanner, Glenda M Halliday, Patrik Brundin, Jens Volkmann, Anette-Eleonore Schrag, Anthony E Lang
Parkinson disease is the second-most common neurodegenerative disorder that affects 2-3% of the population ≥65 years of age. Neuronal loss in the substantia nigra, which causes striatal dopamine deficiency, and intracellular inclusions containing aggregates of α-synuclein are the neuropathological hallmarks of Parkinson disease. Multiple other cell types throughout the central and peripheral autonomic nervous system are also involved, probably from early disease onwards. Although clinical diagnosis relies on the presence of bradykinesia and other cardinal motor features, Parkinson disease is associated with many non-motor symptoms that add to overall disability...
March 23, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28331948/erratum-to-diagnostic-imaging-of-dementia-with-lewy-bodies-by-susceptibility-weighted-imaging-of-nigrosomes-versus-striatal-dopamine-transporter-single-photon-emission-computed-tomography-a-retrospective-observational-study
#8
Koji Kamagata, Tomoya Nakatsuka, Ryuji Sakakibara, Yohei Tsuyusaki, Tomohiro Takamura, Kanako Sato, Michimasa Suzuki, Masaaki Hori, Kanako K Kumamaru, Tsutomu Inaoka, Shigeki Aoki, Hitoshi Terada
No abstract text is available yet for this article.
March 22, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28331177/baseline-dependent-effects-of-amphetamine-on-attention-are-associated-with-striatal-dopamine-metabolism
#9
Karly M Turner, James Peak, Thomas H J Burne
Psychostimulants, such as amphetamine, are widely used to treat attentional deficits. In humans, response to dopaminergic medications is complex with improvement often dependent on baseline performance. Our goal was to determine if attention in rats could be improved by low dose amphetamine in a baseline-dependent manner by examining the relationship between task performance, drug response and monoamine levels in corticostriatal tissue. Firstly, rats performed a signal detection task with varying signal durations before administration of saline, 0...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28331148/optimized-acquisition-time-for-dopamine-transporter-imaging
#10
Naoya Hayashi, Naoki Akagi, Masataka Sawada, Akiko Hirota, Kenji Ito
Excess acquisition counts were often obtained by the current image acquisition of 30 minutes after (123)I-ioflupane administration in a dopamine transporter study. The purpose of this study was to calculate the minimum acquisition time while retaining sufficient image quality, which could be adjusted for individual characteristics. Fifty patients who underwent dopamine transporter imaging were included in this retrospective study. The brain count density, determined by a striatum phantom, was compared to the participant's characteristics...
2017: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/28330956/predictive-markers-for-early-conversion-of-irbd-to-neurodegenerative-synucleinopathy-diseases
#11
Yuanyuan Li, Wenyan Kang, Qiong Yang, Lina Zhang, Linyuan Zhang, Fangyi Dong, Shengdi Chen, Jun Liu
OBJECTIVE: To determine the predictive value of clinical assessment and dopamine transporter (DAT) uptake for the early development of neurodegenerative synucleinopathy diseases from idiopathic REM sleep behavior disorder (iRBD) over 5 years in a Chinese population. METHODS: Forty-three patients with iRBD were administered clinical assessment tests, and 35 were examined by DAT-SPECT imaging during 2011. Cox proportional hazard and Kaplan-Meier analyses were used to evaluate the predictive value of the markers in a follow-up study over 5 years...
March 22, 2017: Neurology
https://www.readbyqxmd.com/read/28323555/influence-of-dopamine-related-genes-on-neurobehavioral-recovery-after-traumatic-brain-injury-during-early-childhood
#12
Amery Treble-Barna, Shari L Wade, Lisa J Martin, Valentina Pilipenko, Keith Owen Yeates, H Gerry Taylor, Brad G Kurowski
The present study examined the association of dopamine-related genes with short- and long-term neurobehavioral recovery, as well as neurobehavioral recovery trajectories over time, in children who had sustained early childhood traumatic brain injuries (TBI) relative to children who had sustained orthopedic injuries (OI). Participants were recruited from a prospective, longitudinal study evaluating outcomes of children who sustained a TBI (n = 68) or OI (n = 72) between the ages of 3 and 7 years. Parents completed ratings of child executive function and behavior at the immediate post-acute period (0-3 months after injury); 6, 12, and 18 months after injury; and an average of 3...
March 21, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28323029/the-dopamine-d3-receptor-antagonists-pg01037-ngb2904-sb277011a-and-u99194-reverse-abcg2-transporter-mediated-drug%C3%A2-resistance-in-cancer-cell-lines
#13
Noor Hussein, Haneen Amawi, Chandrabose Karthikeyan, F Scott Hall, Roopali Mittal, Piyush Trivedi, Charles R Ashby, Amit K Tiwari
The ATP - binding cassette (ABC) family G2 (ABCG2) transporters are known to produce multidrug resistance (MDR) in cancer, thereby limiting the clinical response to chemotherapy. Molecular modeling data indicated that certain dopamine (DA) D3 receptor antagonists had a significant binding affinity for ABCG2 transporter. Therefore, in this in vitro study, we determined the effect of the D3 receptor antagonists PG01037, NGB2904, SB277011A, and U99194 on MDR resulting from the overexpression of ABCG2 transporters...
March 18, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28320223/kinect-3-a-phase-3-randomized-double-blind-placebo-controlled-trial-of-valbenazine-for-tardive-dyskinesia
#14
Robert A Hauser, Stewart A Factor, Stephen R Marder, Mary Ann Knesevich, Paul M Ramirez, Roland Jimenez, Joshua Burke, Grace S Liang, Christopher F O'Brien
OBJECTIVE: Tardive dyskinesia is a persistent movement disorder induced by dopamine receptor blockers, including antipsychotics. Valbenazine (NBI-98854) is a novel, highly selective vesicular monoamine transporter 2 inhibitor that demonstrated favorable efficacy and tolerability in the treatment of tardive dyskinesia in phase 2 studies. This phase 3 study further evaluated the efficacy, safety, and tolerability of valbenazine as a treatment for tardive dyskinesia. METHOD: This 6-week, randomized, double-blind, placebo-controlled trial included patients with schizophrenia, schizoaffective disorder, or a mood disorder who had moderate or severe tardive dyskinesia...
March 21, 2017: American Journal of Psychiatry
https://www.readbyqxmd.com/read/28320195/combined-use-of-dopamine-transporter-imaging-dat-spect-and-123-i-metaiodobenzylguanidine-mibg-myocardial-scintigraphy-for-diagnosing-parkinson-s-disease
#15
Fumihito Yoshii, Masafuchi Ryo, Yasuhiko Baba, Takashi Koide, Jun Hashimoto
BACKGROUND: To examine whether combined use of (123)I-FP-CIT dopamine transporter single photon emission computed tomography (DAT-SPECT) and (123)I-MIBG myocardial scintigraphy (MIBG) is superior to either modality alone for diagnosing Parkinson's disease (PD). METHODS: Patients with probable PD (n=120) who underwent both DAT-SPECT and MIBG myocardial scintigraphy within short intervals were enrolled. Specific binding ratio (SBR) of DAT-SPECT images and heart-to-mediastinum (H/M) ratio of MIBG images were used as quantitative measures...
April 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28319392/scaffold-repurposing-of-nucleosides-adenosine-receptor-agonists-enhanced-activity-at-the-human-dopamine-and-norepinephrine-sodium-symporters
#16
Dilip K Tosh, Aaron Janowsky, Amy J Eshleman, Eugene Warnick, Zhan-Guo Gao, Zhoumou Chen, Elizabeth Gizewski, John A Auchampach, Daniela Salvemini, Kenneth A Jacobson
We have repurposed (N)-methanocarba adenosine derivatives (A3 adenosine receptor (AR) agonists) to enhance radioligand binding allosterically at the human dopamine (DA) transporter (DAT) and inhibit DA uptake. We extended the structure-activity relationship of this series with small N(6)-alkyl substitution, 5'-esters, deaza modifications of adenine, and ribose restored in place of methanocarba. C2-(5-Halothien-2-yl)-ethynyl 5'-methyl 9 (MRS7292) and 5'-ethyl 10 (MRS7232) esters enhanced binding at DAT (EC50 ∼ 35 nM) and at the norepinephrine transporter (NET)...
March 20, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28318542/monoamine-transporters-as-ionotropic-receptors
#17
Louis J De Felice
It is well established that glutamate and GABA signal through both ionotropic and metabotropic receptors. Conversely, it is thought that, with one exception, monoamines (dopamine, serotonin, and norepinephrine) signal via metabotropic receptors. Given their capacity to generate fast-acting currents, I suggest that the monoamine transporters should be considered as ionotropic receptors.
March 16, 2017: Trends in Neurosciences
https://www.readbyqxmd.com/read/28315693/central-glp-1-receptor-activation-modulates-cocaine-evoked-phasic-dopamine-signaling-in-the-nucleus-accumbens-core
#18
Samantha M Fortin, Mitchell F Roitman
Drugs of abuse increase the frequency and magnitude of brief (1-3s), high concentration (phasic) dopamine release events in terminal regions. These are thought to be a critical part of drug reinforcement and ultimately the development of addiction. Recently, metabolic regulatory peptides, including the satiety signal glucagon-like peptide-1 (GLP-1), have been shown to modulate cocaine reward-driven behavior and sustained dopamine levels after cocaine administration. Here, we use fast-scan cyclic voltammetry (FSCV) to explore GLP-1 receptor (GLP-1R) modulation of dynamic dopamine release in the nucleus accumbens (NAc) during cocaine administration...
March 15, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28314910/the-relationship-between-the-dopaminergic-system-and-depressive-symptoms-in-cervical-dystonia
#19
E Zoons, M A J Tijssen, Y E M Dreissen, J D Speelman, M Smit, J Booij
PURPOSE: Cervical dystonia (CD) is associated with tremor/jerks (50%) and psychiatric complaints (17-70%). The dopaminergic system has been implicated in the pathophysiology of CD in animal and imaging studies. Dopamine may be related to the motor as well as non-motor symptoms of CD. CD is associated with reduced striatal dopamine D2/3 (D2/3) receptor and increased dopamine transporter (DAT) binding. There are differences in the dopamine system between CD patients with and without jerks/tremor and psychiatric symptoms...
March 17, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28304294/long-term-cognitive-decline-in-dementia-with-lewy-bodies-in-a-large-multicenter-international-cohort
#20
Milica G Kramberger, Bjørn Auestad, Sara Garcia-Ptacek, Carla Abdelnour, Josep Garre Olmo, Zuzana Walker, Afina W Lemstra, Elisabet Londos, Frederic Blanc, Laura Bonanni, Ian McKeith, Bengt Winblad, Frank Jan de Jong, Flavio Nobili, Elka Stefanova, Maria Petrova, Cristian Falup-Pecurariu, Irena Rektorova, Sevasti Bostantjopoulou, Roberta Biundo, Daniel Weintraub, Dag Aarsland
BACKGROUND/OBJECTIVE: The aim of this study was to describe the rate and clinical predictors of cognitive decline in dementia with Lewy bodies (DLB), and compare the findings with Alzheimer's disease (AD) and Parkinson's disease dementia (PDD) patients. METHODS: Longitudinal scores for the Mini-Mental State Examination (MMSE) in 1,290 patients (835 DLB, 198 PDD, and 257 AD) were available from 18 centers with up to three years longitudinal data. Linear mixed effects analyses with appropriate covariates were used to model MMSE decline over time...
March 10, 2017: Journal of Alzheimer's Disease: JAD
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