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Psychostimulant

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https://www.readbyqxmd.com/read/29781560/conditioned-reward-of-opioids-but-not-psychostimulants-is-impaired-in-gaba-a-receptor-%C3%AE-subunit-knockout-mice
#1
Milo S Siivonen, Elena de Miguel, Juho Aaltio, Aino K Manner, Mikko Vahermo, Jari Yli-Kauhaluoma, Anni-Maija Linden, Teemu Aitta-Aho, Esa R Korpi
Extrasynaptic δ subunit-containing γ-aminobutyric acid type A receptors (δ-GABAA Rs) are emerging as targets for a number of neuropsychopharmacological drugs, including the direct GABA-site agonist gaboxadol and neuroactive steroids. Among other regions, these δ-GABAA Rs are functionally expressed in the ventral tegmental area (VTA), the cell body region of mesocorticolimbic dopamine (DA) system important for motivated behaviors, and in the target region, the nucleus accumbens. Gaboxadol and neurosteroids induce VTA DA neuron plasticity ex vivo, by inhibiting the VTA GABA neurons, and aversive place conditioning, which are absent in the δ-GABAA R knockout mice (δ-KO)...
May 21, 2018: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/29777288/time-shifting-effects-of-methylphenidate-on-daily-rhythms-in-the-diurnal-rodent-arvicanthis-ansorgei
#2
Jorge Mendoza, Hester C van Diepen, Rob Rodrigues Pereira, Johanna H Meijer
People suffering of attention-deficit/hyperactivity disorder (ADHD) and treated with the psychostimulant methylphenidate (MPH) show sleep-wake cycle and daily rhythm alterations despite the beneficial effects of MPH on behavioral symptoms (i.e., hyperactivity, attention). In nocturnal rodents (i.e., mice), chronic exposure to MPH alters the neural activity of the circadian clock in the suprachiasmatic nucleus (SCN), behavioral rhythms, and the sleep-wake cycle. Here, we studied the effects of MPH on daily rhythms of behavior and body temperature of the diurnal rodent Arvicanthis ansorgei...
May 18, 2018: Psychopharmacology
https://www.readbyqxmd.com/read/29773909/an-unsuspected-role-for-organic-cation-transporter-3-in-the-actions-of-amphetamine
#3
Felix P Mayer, Diethart Schmid, W Anthony Owens, Georgianna G Gould, Mia Apuschkin, Oliver Kudlacek, Isabella Salzer, Stefan Boehm, Peter Chiba, Piper H Williams, Hsiao-Huei Wu, Ulrik Gether, Wouter Koek, Lynette C Daws, Harald H Sitte
Amphetamine abuse is a major public health concern for which there is currently no effective treatment. To develop effective treatments, the mechanisms by which amphetamine produces its abuse-related effects need to be fully understood. It is well known that amphetamine exerts its actions by targeting high-affinity transporters for monoamines, in particular the cocaine-sensitive dopamine transporter. Organic cation transporter 3 (OCT3) has recently been found to play an important role in regulating monoamine signaling...
April 6, 2018: Neuropsychopharmacology: Official Publication of the American College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29768018/psychostimulants-influence-on-body-mass-index-and-height-in-a-pediatric-population-with-attention-deficit-hyperactivity-disorder
#4
Yvette E Lentferink, Ewoudt M W van de Garde, Catherijne A J Knibbe, Marja M J van der Vorst
OBJECTIVES: Attention-deficit/hyperactivity disorder (ADHD) is often treated with psychostimulants. Psychostimulants' adverse effects on body mass index standard deviation score (BMI-sds) and height in children/adolescents with ADHD have been reported. However, literature is inconsistent, and it is unclear whether the observed effects are dosage- and/or BMI-dependent. Therefore, the aim of this retrospective observational study is to evaluate the influence of psychostimulants on BMI-sds and height-sds in a pediatric cohort with ADHD from an outpatient clinic, and to study the correlation between psychostimulant dosage and BMI-sds and height-sds change...
May 16, 2018: Journal of Child and Adolescent Psychopharmacology
https://www.readbyqxmd.com/read/29767387/no-medication-for-my-child-a-naturalistic-study-on-the-treatment-preferences-for-and-effects-of-cogmed-working-memory-training-versus-psychostimulant-medication-in-clinically-referred-youth-with-adhd
#5
Peter Muris, Dorien Roodenrijs, Lut Kelgtermans, Sonja Sliwinski, Ulrike Berlage, Hanna Baillieux, Anne Deckers, Marieke Gunther, Bertien Paanakker, Ida Holterman
In this naturalistic clinical study, we explored the applicability and clinical effectiveness of Cogmed WMT, pharmacotherapy, and their combination for clinically referred children and adolescents with attention-deficit/hyperactivity disorder (ADHD). Ninety youth with ADHD (ages 6-16 years) and their parents were offered the possibility to choose one of the three interventions. The motives for choosing various interventions were quite different. Medication was chosen because this treatment was expected to be most effective, but also because the Cogmed WMT program was regarded as too taxing...
May 16, 2018: Child Psychiatry and Human Development
https://www.readbyqxmd.com/read/29763685/autophagy-plays-a-pro-survival-role-against-methamphetamine-induced-apoptosis-in-h9c2-cells
#6
Chao Zhao, Yong Mei, Xufeng Chen, Lei Jiang, Yunfei Jiang, Xu Song, Hang Xiao, Jun Wang, Jingsong Zhang
Methamphetamine (METH) is a commonly abused psychostimulant that can induce severe neurotoxicity. Cardiovascular injury caused by METH has recently gained increasing attention; however, the underlying mechanisms remain unclear. As autophagy has been shown to be associated with cell injury, the association between autophagy and METH-mediated cell apoptosis was investigated in the present study. METH treatment significantly increased the expression of two key autophagy proteins, i.e., Beclin-1 and LC3-II, in the cardiomyocyte cell line H9C2...
May 12, 2018: Toxicology Letters
https://www.readbyqxmd.com/read/29763648/autism-spectrum-disorder-classification-diagnosis-and-therapy
#7
REVIEW
Samata R Sharma, Xenia Gonda, Frank I Tarazi
Autism Spectrum Disorder (ASD) refers to a group of neurodevelopmental disorders including autism, Asperger's syndrome (AS) and pervasive developmental disorder-not otherwise specified (PDD-NOS). The new diagnostic criteria of ASD focuses on two core domains: social communication impairment and restricted interests/repetitive behaviors. The prevalence of ASD has been steadily increasing over the past two decades, with current estimates reaching up to 1 in 36 children. Hereditary factors, parental history of psychiatric disorders, pre-term births, and fetal exposure to psychotropic drugs or insecticides have all been linked to higher risk of ASD...
May 12, 2018: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29760868/non-medical-use-of-prescription-drugs-by-young-men-impact-of-potentially-traumatic-events-and-of-social-environmental-stressors
#8
Ansgar Rougemont-Bücking, Véronique S Grazioli, Simon Marmet, Jean-Bernard Daeppen, Mélissa Lemoine, Gerhard Gmel, Joseph Studer
Background : Non-medical use of prescription drugs (NMUPD) is an increasing phenomenon associated with physical and psychological consequences. This study investigated the effects of distinct forms of stress on NMUPD. Methods : Data from 5308 young adult men from the Swiss cohort study on substance use risk factors (C-SURF) were analysed regarding NMUPD of sleeping pills, tranquilizers, opioid analgesics, psychostimulants, and antidepressants. Various forms of stress (discrete, potentially traumatic events, recent and long-lasting social-environmental stressors) during the period preceding the NMUPD assessment were measured...
2018: European Journal of Psychotraumatology
https://www.readbyqxmd.com/read/29760180/the-affective-and-neural-correlates-of-heroin-vs-cocaine-use-in-addiction-are-influenced-by-environmental-setting-but-in-opposite-directions
#9
Silvana De Pirro, Gaspare Galati, Luigi Pizzamiglio, Aldo Badiani
Previous studies have shown that individuals with heroin and cocaine addiction prefer to use these drugs in distinct settings: mostly at home in the case of heroin and mostly outside the home in the case of cocaine. Here we investigated whether the context would modulate the affective and neural responses to these drugs in a similar way. First, we used a novel emotional task to assess the affective state produced by heroin or cocaine in different settings, based on the recollections of male and female drug users...
May 14, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29750935/altered-regulation-of-nur77-nuclear-receptor-gene-expression-in-the-mesocorticolimbic-regions-of-rat-brain-by-amphetamine-sensitization
#10
Sanjeev K Bhardwaj, Fatéma Dodat, Daniel Lévesque, Lalit K Srivastava
The mechanisms underlying psychostimulant drug-induced sensitization include long-term cellular and molecular adaptations in dopaminergic circuits. Nur77, a member of the Nur family of transcription factors, is expressed in brain regions receiving dopamine inputs and plays a role in activity-induced synaptic modification. Here we evaluated changes in Nur77 mRNA levels in the medial prefrontal cortex (mPFC), dorsal striatum (Str) and nucleus accumbens (NAc) of rats receiving a repeated, sensitizing regimen of amphetamine (AMPH)...
May 8, 2018: Brain Research
https://www.readbyqxmd.com/read/29744873/methylphenidate-for-attention-deficit-hyperactivity-disorder-adhd-in-children-and-adolescents-assessment-of-adverse-events-in-non-randomised-studies
#11
REVIEW
Ole Jakob Storebø, Nadia Pedersen, Erica Ramstad, Maja Lærke Kielsholm, Signe Sofie Nielsen, Helle B Krogh, Carlos R Moreira-Maia, Frederik L Magnusson, Mathilde Holmskov, Trine Gerner, Maria Skoog, Susanne Rosendal, Camilla Groth, Donna Gillies, Kirsten Buch Rasmussen, Dorothy Gauci, Morris Zwi, Richard Kirubakaran, Sasja J Håkonsen, Lise Aagaard, Erik Simonsen, Christian Gluud
BACKGROUND: Attention deficit hyperactivity disorder (ADHD) is a common neurodevelopmental disorder in childhood. The psychostimulant methylphenidate is the most frequently used medication to treat it. Several studies have investigated the benefits of methylphenidate, showing possible favourable effects on ADHD symptoms, but the true magnitude of the effect is unknown. Concerning adverse events associated with the treatment, our systematic review of randomised clinical trials (RCTs) demonstrated no increase in serious adverse events, but a high proportion of participants suffered a range of non-serious adverse events...
May 9, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29744081/a-case-report-of-hypersomnia-in-tetrasomy-x-improved-with-medical-therapy
#12
Dilip Jayaraman, Karen S Carvalho, Daphne M Hasbani
Tetrasomy X is a rare chromosomal anomaly in which sleep disorders have not been previously reported. We report on one patient with tetrasomy X and hypersomnia successfully treated with psychostimulant therapy. Sleep disorders are rarely reported in chromosomal anomalies. Clinicians should screen patients for sleep disorders and manage them appropriately.
May 2018: Clinical Case Reports
https://www.readbyqxmd.com/read/29739866/region-specific-regulation-of-presynaptic-dopamine-homeostasis-by-d2-autoreceptors-shapes-the-in-vivo-impact-of-the-neuropsychiatric-disease-associated-dat-variant-val559
#13
Raajaram Gowrishankar, Paul J Gresch, Gwynne L Davis, Rania M Katamish, Justin R Riele, Adele M Stewart, Roxanne A Vaughan, Maureen K Hahn, Randy D Blakely
Disruptions of dopamine (DA) signaling contribute to a broad spectrum of neuropsychiatric disorders, including attention-deficit hyperactivity disorder (ADHD), addiction, bipolar disorder and schizophrenia. Despite evidence that risk for these disorders derives from heritable variation in DA-linked genes, a better understanding is needed of the molecular and circuit context through which gene variation drives distinct disease traits. Previously, we identified the DA transporter (DAT) variant Val559 in subjects with ADHD and established that the mutation supports anomalous DAT-mediated DA efflux (ADE)...
May 8, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29736334/-sideritis-scardica-extracts-inhibit-aggregation-and-toxicity-of-amyloid-%C3%AE-in-caenorhabditis-elegans-used-as-a-model-for-alzheimer-s-disease
#14
Felix Heiner, Björn Feistel, Michael Wink
Background: Beyond its traditional uses in the Balkan area, Sideritis scardica (known as Greek mountain tea, Lamiaceae) is currently extensively investigated for its pharmacological activity in the central nervous system. Antidepressant, psychostimulating, cognition-enhancing and neuroprotective properties have been described. In this study, we tested hydroalcoholic extracts of S. scardica for their potential to counteract amyloid-β toxicity and aggregation, which plays a crucial role in the pathogenesis of Alzheimer's disease...
2018: PeerJ
https://www.readbyqxmd.com/read/29714473/dark-classics-in-chemical-neuroscience-cathinone-derived-psychostimulants
#15
Steven J Simmons, Jonna M Leyrer-Jackson, Chicora F Oliver, Callum Hicks, John Muschamp, Scott M Rawls, M Foster Olive
Cathinone is a plant alkaloid found in khat leaves of perennial shrubs grown in East Africa. Similar to cocaine, cathinone elicits psychostimulant effects which are in part attributed to its amphetamine-like structure. Around 2010, home laboratories began altering the parent structure of cathinone to synthesize derivatives with mechanisms of action, potencies, and pharmacokinetics permitting high abuse potential and toxicity. These "synthetic cathinones" include 4-methylmethcathinone (mephedrone), 3,4-methylenedioxypyrovalerone (MDPV) and the empathogenic agent 3,4-methylenedioxymethcathinone (methylone) which collectively gained international popularity following aggressive online marketing as well as availability in various retail outlets...
May 1, 2018: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29713996/the-effects-of-exposure-to-mephedrone-during-adolescence-on-brain-neurotransmission-and-neurotoxicity-in-adult-rats
#16
Katarzyna Kamińska, Karolina Noworyta-Sokołowska, Anna Górska, Joanna Rzemieniec, Agnieszka Wnuk, Adam Wojtas, Grzegorz Kreiner, Małgorzata Kajta, Krystyna Gołembiowska
According to the European Drug Report (2016), the use of synthetic cathinones, such as mephedrone, among young people has rapidly increased in the last years. Studies in humans indicate that psychostimulant drug use in adolescence increases risk of drug abuse in adulthood. Mephedrone by its interaction with transporters for dopamine (DAT) and serotonin (SERT) stimulates their release to the synaptic cleft. In animal studies, high repeated doses of mephedrone given to adolescent but not adult mice or rats induced toxic changes in 5-hydroxytryptamine (5-HT) neurons...
April 30, 2018: Neurotoxicity Research
https://www.readbyqxmd.com/read/29707999/an-examination-of-blood-cell-membrane-potential-as-a-diagnostic-test-of-attention-deficit-disorder-in-children
#17
Ekaterina Stepanova, Robert L Findling, Dana Kaplin, Bernice Frimpong, Sofia Pikalova, Andrea S Young
OBJECTIVE: To reexamine previous findings that reported that blood cells' membrane potential ratios (MPRs™) differ between youth with ADHD and controls and to determine whether psychostimulants affect MPRs™. METHOD: Forty-four youth (ages 6-17) with ADHD (not currently taking psychostimulants; n = 24) and controls ( n = 20) completed the Mini-International Neuropsychiatric Interview 7 (MINI 7) and a blood draw to determine MPR™. Youth with ADHD provided another blood draw 30 days after receiving psychostimulants...
April 1, 2018: Journal of Attention Disorders
https://www.readbyqxmd.com/read/29707422/modafinil-for-the-improvement-of-patient-outcomes-following-traumatic-brain-injury
#18
REVIEW
Amne Borghol, Michael Aucoin, Ifeanyichukwu Onor, Dana Jamero, Fadi Hawawini
Objective : The authors sought to assess the literature evidence on the efficacy of modafinil use in patients with fatigue or excessive daytime sleepiness (EDS) secondary to traumatic brain injury (TBI). Method of Research : A literature search of Medline and PubMed was performed using the EBSCOhost database. Primary literature, observational studies, meta-analyses, case reports, and systematic reviews were assessed for content regarding modafinil and psychostimulant use in patients with TBI. Of the 23 articles collected, three randomized, controlled studies, three observational studies, one case report, and two systematic reviews gave a description of modafinil use in TBI patients...
April 1, 2018: Innovations in Clinical Neuroscience
https://www.readbyqxmd.com/read/29704983/intermittent-stimulation-in-the-nucleus-basalis-of-meynert-improves-sustained-attention-in-rhesus-monkeys
#19
Ruifeng Liu, Jonathan Crawford, Patrick M Callahan, Alvin V Terry, Christos Constantinidis, David T Blake
Sustained attention is essential in important behaviors in daily life. Many neuropsychiatric disorders are characterized by a compromised ability to sustain attention, making this cognitive domain an important therapeutic target. In this study, we tested a novel method of improving sustained attention. Monkeys were engaged in a continuous performance task (CPT) while the nucleus basalis of Meynert (NB), the main source of cholinergic innervation of the neocortex, was stimulated. Intermittent NB stimulation improved the animals' performance by increasing the hit rate and decreasing the false alarm rate...
April 26, 2018: Neuropharmacology
https://www.readbyqxmd.com/read/29704596/locomotor-sensitization-to-cocaine-in-adolescent-and-adult-female-wistar-rats
#20
Sydney A Rowson, Stephanie L Foster, David Weinshenker, Gretchen N Neigh
Adolescent stress exposure is a risk factor for drug abuse, and sex differences contribute to psychostimulant responses. Although many studies have utilized the Wistar rat strain in adolescent stress paradigms, the impact of adolescent stress exposure on addiction-like outcomes has not been rigorously tested in female Wistar rats. In this study, locomotor sensitization was assessed in adolescent and adult female Wistar rats following either chronic stress during adolescence (CAS) or no stress (NS). Adolescent, but not adult, female Wistar rats developed locomotor sensitization to 15 mg/kg cocaine over 5 days of treatment, regardless of stress history...
April 25, 2018: Behavioural Brain Research
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