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Psychostimulants

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https://www.readbyqxmd.com/read/28431969/crfr1-in-the-ventromedial-caudate-putamen-modulates-acute-stress-enhanced-expression-of-cocaine-locomotor-sensitization
#1
Shuli Liu, Zhiyan Wang, Yijing Li, Xiaowei Sun, Feifei Ge, Mingda Yang, Xinjuan Wang, Na Wang, Junkai Wang, Cailian Cui
Repeated exposure to psychostimulants induces a long-lasting enhancement of locomotor activity called behavioral sensitization, which is often reinforced by stress after drug withdrawal. The mechanisms underlying these phenomena remain elusive. Here we explored the effects of acute stress 3 or 14 days after the cessation of chronic cocaine treatment on the expression of locomotor sensitization induced by a cocaine challenge in rats and the key brain region and molecular mechanism underlying the phenomenon. A single session of forced swimming, as an acute stress (administered 2 days after the cessation of cocaine), significantly enhanced the expression of cocaine locomotor sensitization 14 days after the final cocaine injection (challenge at 12 days after acute stress) but not 3 days after the cessation of cocaine (challenge at 1 day after acute stress)...
April 18, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28430805/effect-of-the-glucocorticoid-receptor-antagonist-ru486-on-mk-801-induced-behavioural-sensitisation
#2
Emilia M Lefevre, Gregory A Medley, Timothy Reeks, Suzy Alexander, Thomas H J Burne, Darryl W Eyles
Stress is known to modulate sensitisation to repeated psychostimulant exposure. However, there is no direct evidence linking glucocorticoids and sensitisation achieved by repeated administration of the NMDA receptor antagonist MK-801. We tested the hypothesis that co-administration of RU486, a glucocorticoid receptor (GR) antagonist, prior to repeated daily MK-801 injections would block the expression of locomotor sensitisation due to its dual effects on corticosterone and dopamine. We employed a repeated MK-801 administration locomotor sensitisation paradigm in male Sprague Dawley rats...
2017: PloS One
https://www.readbyqxmd.com/read/28427996/no-evidence-that-environmental-enrichment-during-rearing-protects-against-cocaine-behavioral-effects-but-as-an-intervention-reduces-an-already-established-cocaine-conditioned-place-preference
#3
E Galaj, A Shukur, M Manuszak, K Newman, R Ranaldi
OBJECTIVES: Environmental enrichment (EE) produces differential effects on psychostimulant-related behaviors. Therefore, we investigated whether EE introduced during rearing and before cocaine exposure versus in adulthood and after cocaine exposure might be a determinant. METHODS: In Experiment 1, rats reared with EE or not (non-EE) were conditioned with cocaine (5, 10 or 20mg/kg) in one compartment of a CPP apparatus and saline in the other, and later tested for cocaine CPP...
April 17, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28427995/conditioned-taste-avoidance-conditioned-place-preference-and-hyperthermia-induced-by-the-second-generation-bath-salt-%C3%AE-pyrrolidinopentiophenone-%C3%AE-pvp
#4
Katharine H Nelson, Briana J Hempel, Matthew M Clasen, Kenner C Rice, Anthony L Riley
BACKGROUND: α-Pyrrolidinopentiophenone (α-PVP) has been reported to be rewarding in a variety of pre-clinical models. Given that a number of drugs of abuse have both rewarding and aversive effects, the balance of which influences addiction potential, the present study examined the aversive properties of α-PVP by assessing its ability to induce taste avoidance. This assessment was made in a combined taste avoidance/place conditioning design that also allowed an evaluation of the relationship between α-PVP's aversive and rewarding effects...
April 17, 2017: Pharmacology, Biochemistry, and Behavior
https://www.readbyqxmd.com/read/28412920/neuropsychiatric-and-general-interactions-of-natural-and-synthetic-cannabinoids-with-drugs-of-abuse-and-medicines
#5
Ana Lucia Arellano, Esther Papaseit, Anna Romaguera, Marta Torrens, Magi Farré
Cannabis is the most widely used illicit drug. The two most important natural cannabinoids are delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD). The THC content of cannabis has been increasing during the last years and recently appeared in the market a series of synthetic cannabinoids with potent agonist activity. Recreational users frequently combine cannabis with other drugs of abuse as alcohol, amphetamines and derivatives, nicotine and cocaine. In addition these subjects can be taking medicines for acute and chronic medical conditions...
April 13, 2017: CNS & Neurological Disorders Drug Targets
https://www.readbyqxmd.com/read/28404688/brain-disposition-of-cis-para-methyl-4-methylaminorex-cis-4-4-dmar-and-its-potential-metabolites-after-acute-and-chronic-treatment-in-rats-correlation-with-central-behavioral-effects
#6
Jacopo Lucchetti, Claudio Marcello Marzo, Alice Passoni, Angelo Di Clemente, Federico Moro, Renzo Bagnati, Marco Gobbi, Luigi Cervo
Para-methyl-4-methylaminorex (4,4'-DMAR) is a phenethylamine derivative with psychostimulant activity, whose abuse has been associated with several deaths and a wide range of adverse effects. We recently validated an HPLC-MS/MS method to measure the compound's concentrations in plasma, and applied it to describe the pharmacokinetic properties after single dose in rats. In this study we investigated the brain disposition and metabolism of cis-4,4'-DMAR after intraperitoneal injection, and its central behavioral effects...
April 12, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28400722/sex-differences-in-the-physiological-and-behavioral-effects-of-chronic-oral-methylphenidate-treatment-in-rats
#7
Lisa S Robison, Michalis Michaelos, Jason Gandhi, Dennis Fricke, Erick Miao, Chiu-Yim Lam, Anthony Mauceri, Melissa Vitale, Junho Lee, Soyeh Paeng, David E Komatsu, Michael Hadjiargyrou, Panayotis K Thanos
Methylphenidate (MP) is a psychostimulant prescribed for Attention Deficit Hyperactivity Disorder. Previously, we developed a dual bottle 8-h-limited-access-drinking-paradigm for oral MP treatment of rats that mimics the pharmacokinetic profile of treated patients. This study assessed sex differences in response to this treatment. Male and female Sprague Dawley rats were assigned to one of three treatment groups at 4 weeks of age (n = 12/group): Control (water), low dose (LD) MP, and high dose (HD) MP. Rats drank 4 mg/kg MP (LD) or 30 mg/kg MP (HD) during the first hour, and 10 mg/kg (LD) or 60 mg/kg MP (HD) for the remaining 7 h each day...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28394253/roundabout-receptor-2-maintains-inhibitory-control-of-the-adult-midbrain
#8
Bryan B Gore, Samara M Miller, Yong Sang Jo, Madison Baird, Mrinalini Hoon, Christina A Sanford, Avery Hunker, Weining Lu, Rachel O Wong, Larry S Zweifel
The maintenance of excitatory and inhibitory balance in the brain is essential for its function. Here we find that the developmental axon guidance receptor Roundabout 2 (Robo2) is critical for the maintenance of inhibitory synapses in the adult ventral tegmental area (VTA), a brain region important for the production of the neurotransmitter dopamine. Following selective genetic inactivation of Robo2 in the adult VTA of mice, reduced inhibitory control results in altered neural activity patterns, enhanced phasic dopamine release, behavioral hyperactivity, associative learning deficits, and a paradoxical inversion of psychostimulant responses...
April 10, 2017: ELife
https://www.readbyqxmd.com/read/28391507/interaction-of-chronic-food-restriction-and-methylphenidate-in-sensation-seeking-of-rats
#9
Aleksandr D Talishinsky, Celine Nicolas, Satoshi Ikemoto
RATIONALE: It is necessary to understand better how chronic food restriction (CFR) and psychostimulant drugs interact in motivated behavior unrelated to food or energy homeostasis. OBJECTIVES: We examined whether CFR augments methylphenidate (MPH)-potentiated responding reinforced by visual sensation (VS) and whether repeated MPH injections or prolonged CFR further augments such responses. METHODS: Before starting the following experiments, rats on a CFR diet received a limited daily ration in such a way that their body weights decreased to 85-90% of their original weights over 2 weeks...
April 8, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/28386228/dynamic-expression-changes-in-the-transcriptome-of-the-prefrontal-cortex-after-repeated-exposure-to-cocaine-in-mice
#10
Mingzhen Li, Peng Xu, Yanhua Xu, Huajing Teng, Weiping Tian, Quansheng Du, Mei Zhao
Prefrontal cortex (PFC)-dependent functions, such as executive function, explicit learning, and memory, are negatively affected in cocaine abusers and experimental animal models of cocaine treatment. However, its molecular mechanisms are less understood. In the present study, we performed transcriptome profiling of the dynamic changes in the PFC after repeated cocaine administration in mice. We found 463, 14, and 535 differentially expressed genes (DEGs) at 2 h, 24 h, and 7 days, respectively, after the withdrawal of chronic cocaine treatment...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28385601/reconsidering-depression-as-a-risk-factor-for-substance-use-disorder-insights-from-rodent-models
#11
REVIEW
Virginie Rappeneau, Anne Bérod
Depression and substance use disorder (SUD) often co-exist and are typically associated with an inaccurate diagnosis, worsened clinical course and poor medication adherence compared to either disorder alone. To date, the biological mechanisms contributing to their strong association remain largely unknown. In this review, we critically analyze preclinical literature on psychostimulant drugs and reconsider the common view that depression is a risk factor for drug use and the development of SUD. Unexpectedly, this investigation led us to conclude that depressive-like states in rodents are associated with a low predisposition to drug intake, at least when considering initial, voluntary and regulated psychostimulant intake...
April 3, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28384623/investigation-on-the-combined-effect-of-cocaine-and-ethanol-administration-through-a-liquid-chromatography-mass-spectrometry-metabolomics-approach
#12
Elena Sánchez-López, Alberto Marcos, Emilio Ambrosio, Oleg A Mayboroda, María Luisa Marina, Antonio L Crego
Alcohol is the most widely consumed legal drug, whereas cocaine is the illicit psychostimulant most commonly used in Europe. The combined use of alcohol and cocaine is frequent among drug-abuse consumers and leads to further exacerbation of health consequences compared to individual consumption. The pharmacokinetic and metabolic interactions leading to an increase in their combined toxicity still remains poorly understood. Here, the first metabolomics study of combined cocaine and ethanol chronic exposure effects is reported...
March 31, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28375605/raman-spectroscopic-signature-markers-of-dopamine-human-dopamine-transporter-interaction-in-living-cells
#13
Achut Prasad Silwal, Rajeev Yadav, Jon E Sprague, H Peter Lu
Dopamine (DA) controls many psychological and behavioral activities in the central nervous system (CNS) through interactions with the human dopamine transporter (hDAT) and dopamine receptors. The roles of DA in the function of the CNS are affected by the targeted binding of drugs to hDAT; thus, hDAT plays a critical role in neurophysiology and neuropathophysiology. An effective experimental method is necessary to study the DA-hDAT interaction and effects of variety of drugs like psychostimulants and anti-depressants that are dependent on this interaction...
April 4, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28370310/pharmacotherapy-effectiveness-for-clinical-subgroups-among-children-and-adolescents-with-early-onset-schizophrenia
#14
Jeanette M Jerrell, Roger S McIntyre, Chelsea B Deroche
OBJECTIVE: This study aims to determine the effectiveness of pharmacotherapies among children and adolescents diagnosed with early onset schizophrenia subgrouped according to their co-occurring psychiatric disorders. METHODS: A retrospective cohort design was employed, using South Carolina's (USA) Medicaid claims dataset covering outpatient and inpatient medical services, between January, 1999 and December, 2013 to identify patients ≤17 years of age. Random effects regression analyses assessed differential changes in acute psychiatric service utilization over time across the 3 subgroups associated with antipsychotic, mood stabilizer, psychostimulant, or antidepressant pharmacotherapy...
March 2017: Human Psychopharmacology
https://www.readbyqxmd.com/read/28369881/pre-exposure-to-cocaine-or-morphine-attenuates-taste-avoidance-conditioning-in-adolescent-rats-drug-specificity-in-the-us-pre-exposure-effect
#15
Matthew M Clasen, Briana J Hempel, Anthony L Riley
Although the attenuating effects of drug history on conditioned taste avoidance (CTA) learning have been widely investigated in adults, such effects in adolescents have not been well characterized. Recent research has suggested that the display of the drug pre-exposure effect during adolescence may be drug dependent given that pre-exposure to ethanol attenuates subsequent conditioning, whereas pre-exposure to the classic emetic lithium chloride (LiCl) fails to do so. The present study began investigating the possible drug-dependent nature of the effects of drug pre-exposure by pre-exposing and conditioning adolescent male Sprague-Dawley rats to drugs from two additional classes, specifically psychostimulants (cocaine; Experiment 1) and opioids (morphine; Experiment 2)...
March 28, 2017: Developmental Psychobiology
https://www.readbyqxmd.com/read/28359885/sex-differences-in-the-acute-locomotor-response-to-methamphetamine-in-balb-c-mice
#16
Odochi Ohia-Nwoko, Colin N Haile, Therese A Kosten
Women use methamphetamine more frequently than men and are more vulnerable to its negative psychological effects. Rodent models have been an essential tool for evaluating the sex-dependent effects of psychostimulants; however, evidence of sex differences in the behavioral responses to methamphetamine in mice is lacking. In the present study, we investigated acute methamphetamine-induced (1mg/kg and 4mg/kg) locomotor activation in female and male BALB/c mice. We also evaluated whether basal locomotor activity was associated with the methamphetamine-induced locomotor response...
March 27, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28351548/behavioral-sensitization-to-methamphetamine-induces-specific-interneuronal-mrna-pathology-across-the-prelimbic-and-orbitofrontal-cortices
#17
Travis A Wearne, Lindsay M Parker, Jane L Franklin, Ann K Goodchild, Jennifer L Cornish
Schizophrenia is associated with significant pathophysiological changes to interneurons within the prefrontal cortex (PFC), with mRNA and protein changes associated with the GABA network localized to specific interneuron subtypes. Methamphetamine is a commonly abused psychostimulant that can induce chronic psychosis and symptoms that are similar to schizophrenia, suggesting that chronic METH induced psychosis may be associated with similar brain pathology to schizophrenia in the PFC. The aim of this study, therefore, was to examine mRNA expression of interneuron markers across two regions of the PFC (prelimbic (PRL) and orbitofrontal cortices (OFC)) following METH sensitization, an animal model of METH psychosis...
March 27, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28342214/real-time-fmri-neurofeedback-in-adolescents-with-attention-deficit-hyperactivity-disorder
#18
Analucia A Alegria, Melanie Wulff, Helen Brinson, Gareth J Barker, Luke J Norman, Daniel Brandeis, Daniel Stahl, Anthony S David, Eric Taylor, Vincent Giampietro, Katya Rubia
Attention Deficit Hyperactivity Disorder (ADHD) is associated with poor self-control, underpinned by inferior fronto-striatal deficits. Real-time functional magnetic resonance neurofeedback (rtfMRI-NF) allows participants to gain self-control over dysregulated brain regions. Despite evidence for beneficial effects of electrophysiological-NF on ADHD symptoms, no study has applied the spatially superior rtfMRI-NF neurotherapy to ADHD. A randomized controlled trial tested the efficacy of rtfMRI-NF of right inferior prefrontal cortex (rIFG), a key region that is compromised in ADHD and upregulated with psychostimulants, on improvement of ADHD symptoms, cognition, and inhibitory fMRI activation...
March 25, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28341944/discriminative-stimulus-effects-of-psychostimulants
#19
Michael D Berquist, William E Fantegrossi
Numerous drugs elicit locomotor stimulant effects at appropriate doses; however, we typically reserve the term psychostimulant to refer to drugs with affinity for monoamine reuptake transporters. This chapter comprises select experiments that have characterized the discriminative stimulus effects of psychostimulants using drug discrimination procedures. The substitution profiles of psychostimulants in laboratory rodents are generally consistent with those observed in human and nonhuman primate drug discrimination experiments...
March 25, 2017: Current Topics in Behavioral Neurosciences
https://www.readbyqxmd.com/read/28341611/extinction-memory-is-facilitated-by-methylphenidate-and-regulated-by-dopamine-and-noradrenaline-receptors
#20
Cristiane R G Furini, Jonny A K Behling, Carolina G Zinn, Mara Lise Zanini, Eduardo Assis Brasil, Luiza Doro Pereira, Ivan Izquierdo, Jociane de Carvalho Myskiw
Extinction is defined as the learned inhibition of retrieval and is the mainstay of exposure therapy, which is widely used to treat drug addiction, phobias and fear disorders. The psychostimulant, methylphenidate (MPH) is known to increase extracellular levels of noradrenaline and dopamine by blocking their reuptake and studies have demonstrated that MPH can modulate hippocampal physiology and/or functions including long-term potentiation (LTP), learning and memory. However, the influence of MPH on fear extinction memory has been insufficiently studied...
March 21, 2017: Behavioural Brain Research
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