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https://www.readbyqxmd.com/read/28188005/g-protein-gated-potassium-channels-a-link-to-drug-addiction
#1
REVIEW
Robert A Rifkin, Stephen J Moss, Paul A Slesinger
G protein-gated inwardly rectifying potassium (GIRK) channels are regulators of neuronal excitability in the brain. Knockout mice lacking GIRK channels display altered behavioral responses to multiple addictive drugs, implicating GIRK channels in addictive behaviors. Here, we review the effects of GIRK subunit deletions on the behavioral response to psychostimulants, such as cocaine and methamphetamine. Additionally, exposure of mice to psychostimulants produces alterations in the surface expression of GIRK channels in multiple types of neurons within the reward system of the brain...
February 7, 2017: Trends in Pharmacological Sciences
https://www.readbyqxmd.com/read/28181466/microstructures-in-striato-thalamo-orbitofrontal-circuit-in-methamphetamine-users
#2
Yadi Li, Haibo Dong, Feng Li, Gaoyan Wang, Wenhua Zhou, Rongbin Yu, Lingjun Zhang
Background Striato-thalamo-orbitofrontal (STO) circuit plays a key role in the development of drug addiction. Few studies have investigated its microstructural abnormalities in methamphetamine (MA) users. Purpose To evaluate the microstructural changes and relevant clinical relevance of the STO circuit in MA users using diffusion tensor imaging (DTI). Material and Methods Twenty-eight MA users and 28 age-matched normal volunteers were enrolled. 3T magnetic resonance imaging (MRI) was employed to obtain structural T1-weighted (T1W) imaging and diffusion-tensor imaging (DTI) data...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28178893/sexually-transmitted-infection-prevalence-and-related-risk-factors-among-heterosexual-male-methamphetamine-users-in-china
#3
Dianchang Liu, Zhenxia Jiang, Cuizhen Xiu, Zhizhi Li, Qing Song, Zhenhong Wang
Few studies have examined the association between methamphetamine (MA) abuse and sexually transmitted infection (STI) risk among heterosexual male MA users in China. A total of 288 heterosexual male MA users who met our inclusion criteria were recruited from nightclubs, KTVs, bars, bath centres and an STI clinic. STIs were screened among the participants, and the risk factors related to STIs were analysed by multivariate logistic regression in SPSS 11.0. Among the 288 heterosexual male MA users, 51 (17.7%) had syphilis, 36 (12...
January 1, 2017: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/28178739/methamphetamine-consumption-during-pregnancy-effects-on-child-health
#4
Jürgen Dinger, Patricia Hinner, Jörg Reichert, Mario Rüdiger
Methamphetamine abuse during pregnancy represents an emerging health care problem. The consequences are not only of relevance to the pregnant women, but also their unborn child. It is associated with an increased risk of preeclampsia and hypertension, fetal demise, preterm delivery, and intrauterine growth restriction. The deleterious effects of prenatal methamphetamine exposure on the developing fetal brain may lead to long-term neuro-developmental and behavioral problems.Given the current evidence, abuse of methamphetamine during pregnancy must be of utmost concern to health care professionals and to policy-makers...
February 8, 2017: Pharmacopsychiatry
https://www.readbyqxmd.com/read/28177556/pattern-and-related-factors-of-cognitive-impairment-among-chronic-methamphetamine-users
#5
Tong-Yu Wang, Teng-Teng Fan, Yan-Ping Bao, Xiao-Dong Li, Chun-Mei Liang, Ru-Jia Wang, Jun Ma, Ying Han, Shi-Qiu Meng, Ping Wu, Jie Shi, Lin Lu
BACKGROUND AND OBJECTIVES: Methamphetamine (MA) use is increasingly prevalent in East and Southeast Asia and commonly associated with cognitive impairment. The present study estimated the characteristics of cognitive impairment and explored the associated potential factors among chronic MA users. METHODS: The data were from the baseline visit of a longitudinal study among synthetic drug users. The baseline survey was conducted in detoxification and rehabilitation centers in Guangdong province, China, from September to December in 2013...
February 8, 2017: American Journal on Addictions
https://www.readbyqxmd.com/read/28130052/pharmacological-activation-of-the-neurotensin-receptor-1-abrogates-the-methamphetamine-induced-striatal-apoptosis-in-the-mouse-brain
#6
Qingkun Liu, Ariela Hazan, Eddie Grinman, Jesus A Angulo
Methamphetamine (METH) is a widely abused psychostimulant displaying potent addictive and neurotoxic properties. METH induces neurotoxicity of dopaminergic terminals and striatal neurons in the striatum. Despite much information on neurotransmitters, the role of neuropeptides is poorly understood. In this study, we investigated the role of the neuropeptide neurotensin on the METH-induced apoptosis of some striatal neurons in mice. We observed that a single injection of METH (30 mg/kg, ip) induced the loss of approximately 15% of striatal neurons...
January 24, 2017: Brain Research
https://www.readbyqxmd.com/read/28123032/role-of-dorsomedial-striatum-neuronal-ensembles-in-incubation-of-methamphetamine-craving-after-voluntary-abstinence
#7
Daniele Caprioli, Marco Venniro, Michelle Zhang, Jennifer M Bossert, Brandon L Warren, Bruce T Hope, Yavin Shaham
: We recently developed a rat model of incubation of methamphetamine craving after choice-based voluntary abstinence. Here, we studied the role of dorsolateral striatum (DLS) and dorsomedial striatum (DMS) in this incubation. We trained rats to self-administer palatable food pellets (6 d, 6 h/d) and methamphetamine (12 d, 6 h/d). We then assessed relapse to methamphetamine seeking under extinction conditions after 1 and 21 abstinence days. Between tests, the rats underwent voluntary abstinence (using a discrete choice procedure between methamphetamine and food; 20 trials/d) for 19 d...
January 25, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28110822/oxytocin-acts-in-nucleus-accumbens-to-attenuate-methamphetamine-seeking-and-demand
#8
Brittney M Cox, Brandon S Bentzley, Helaina Regen-Tuero, Ronald E See, Carmela M Reichel, Gary Aston-Jones
BACKGROUND: Evidence indicates that oxytocin, an endogenous peptide well known for its role in social behaviors, childbirth, and lactation, is a promising addiction pharmacotherapy. We employed a within-session behavioral-economic (BE) procedure in rats to examine oxytocin as a pharmacotherapy for methamphetamine (meth) addiction. The BE paradigm was modeled after BE procedures used to assess motivation for drugs in humans with addiction. The same BE variables assessed across species have been shown to predict later relapse behavior...
December 1, 2016: Biological Psychiatry
https://www.readbyqxmd.com/read/28110353/a-role-for-sigma-receptors-in-stimulant-self-administration-and-addiction
#9
Jonathan L Katz, Takato Hiranita, Weimin C Hong, Martin O Job, Christopher R McCurdy
Sigma receptors (σRs) are structurally unique proteins that function intracellularly as chaperones. Historically, σRs have been implicated as modulators of psychomotor stimulant effects and have at times been proposed as potential avenues for modifying stimulant abuse. However, the influence of ligands for σRs on the effects of stimulants, such as cocaine or methamphetamine, in various preclinical procedures related to drug abuse has been varied. The present paper reviews the effects of σR agonists and antagonists in three particularly relevant procedures: stimulant discrimination, place conditioning, and self-administration...
January 22, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28008351/methamphetamine-addiction-potential-substitute-treatment
#10
Florence Levy
No abstract text is available yet for this article.
December 2016: Therapeutic Advances in Psychopharmacology
https://www.readbyqxmd.com/read/28001458/similarity-and-difference-in-drug-addiction-process-between-heroin-and-methamphetamine-dependent-users
#11
Ziyun Wang, Wei-Xiu Li, Liu Zhi-Min
OBJECTIVES: This study aimed to compare the drug addiction process between Chinese heroin- and methamphetamine (MA)-dependent users via a modified 4-stage addiction model (experimentation, occasional use, regular use, and compulsive use). METHODS: A descriptive study was conducted among 683 eligible participants. In the statistical analysis, we selected 340 heroin- and 295 MA-dependent users without illicit drug use prior to onset of heroin or MA use. RESULTS: The addiction process of heroin-dependent users was shorter than that of MA-dependent users, with shorter transitions from the onset of drug-use to the first drug craving (19...
March 21, 2017: Substance Use & Misuse
https://www.readbyqxmd.com/read/27994179/association-between-smoking-behaviour-and-genetic-variants-of-glial-cell-line-derived-neurotrophic-factor
#12
Eszter Kotyuk, Nora Nemeth, Zsolt Ronai, Zsolt Demetrovics, Maria Sasvari-Szekely, Anna Szekely
Glial cell line-derived neurotrophic factor (GDNF) promotes development and differentiation of dopaminergic neurons, thus it has an important role in dopamine-related neuropsychiatric disorders. Since the role of dopamine system in smoking is well established, we hypothesized that GDNF gene variants may affect smoking behaviour. Self-reported data on smoking behaviour (never smoked, quit, occasional, or regular smokers) and level of nicotine addiction (Hooked on Nicotine Checklist and Fagerstrom Nicotine Addiction Scale), anxiety, as well as buccal samples were obtained from 930 Hungarian young adults (18-35 years)...
December 2016: Journal of Genetics
https://www.readbyqxmd.com/read/27993694/effects-of-chronic-methamphetamine-on-psychomotor-and-cognitive-functions-and-dopamine-signaling-in-the-brain
#13
Panayotis K Thanos, Ronald Kim, Foteini Delis, Mark J Rocco, Jacob Cho, Nora D Volkow
Methamphetamine (MA) studies in animals usually involve acute, binge, or short-term exposure to the drug. However, addicts take substantial amounts of MA for extended periods of time. Here we wished to study the effects of MA exposure on brain and behavior, using an animal model analogous to this pattern of MA intake. MA doses, 4 and 8mg/kg/day, were based on previously reported average daily freely available MA self-administration levels. We examined the effects of 16 week MA treatment on psychomotor and cognitive function in the rat using open field and novel object recognition tests and we studied the adaptations of the dopaminergic system, using in vitro and in vivo receptor imaging...
March 1, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/27989838/opioid-gene-expression-changes-and-post-translational-histone-modifications-at-promoter-regions-in-the-rat-nucleus-accumbens-after-acute-and-repeated-3-4-methylenedioxy-methamphetamine-mdma-exposure
#14
Francesca Felicia Caputi, Martina Palmisano, Lucia Carboni, Sanzio Candeletti, Patrizia Romualdi
The recreational drug of abuse 3,4-methylenedioxymethamphetamine (MDMA) has been shown to produce neurotoxic damage and long-lasting changes in several brain areas. In addition to the involvement of serotoninergic and dopaminergic systems, little information exists about the contribution of nociceptin/orphaninFQ (N/OFQ)-NOP and dynorphin (DYN)-KOP systems in neuronal adaptations evoked by MDMA. Here we investigated the behavioral and molecular effects induced by acute (8mg/kg) or repeated (8mg/kg twice daily for seven days) MDMA exposure...
October 29, 2016: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/27980115/role-of-dorsomedial-striatum-neuronal-ensembles-in-incubation-of-methamphetamine-craving-after-voluntary-abstinence
#15
Daniele Caprioli, Marco Venniro, Michelle Zhang, Jennifer M Bossert, Brandon L Warren, Bruce T Hope, Yavin Shaham
: We recently developed a rat model of incubation of methamphetamine craving after choice-based voluntary abstinence. Here, we studied the role of dorsolateral and dorsomedial striatum (DLS, DMS) in this incubation.We trained rats to self-administer palatable food pellets (6 days, 6-h/d) and methamphetamine (12 days, 6-h/d). We then assessed relapse to methamphetamine seeking under extinction conditions after 1 and 21 abstinence days. Between tests, the rats underwent voluntary abstinence (using a discrete choice procedure between methamphetamine and food; 20 trials/day) for 19 days...
December 15, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27975079/strong-willed-but-not-successful-the-importance-of-strategies-in-recovery-from-addiction
#16
Anke Snoek, Neil Levy, Jeanette Kennett
INTRODUCTION: Philosophers, cognitive and social psychologists and laypeople often subscribe to the view that willpower is central to recovery from addiction. But there are reasons to suspect that willpower is much less important to explaining recovery than this view suggests. METHODS: Here we report findings from a qualitative longitudinal study on how substance dependent people see their agency and self-control, and how their self-control develops over time. 69 opioid, alcohol and methamphetamine dependent people were interviewed over a 3 year period...
December 2016: Addictive Behaviors Reports
https://www.readbyqxmd.com/read/27939341/the-effects-of-varenicline-on-methamphetamine-self-administration-and-drug-primed-reinstatement-in-male-rats
#17
Steven T Pittenger, Scott T Barrett, Shinnyi Chou, Rick A Bevins
Methamphetamine (meth) addiction is a costly burden to both the individual user and society as a whole. Establishing effective pharmacotherapies to treat meth dependence is needed to help solve this health problem. The study reported herein examined the effects of varenicline, a partial α4β2 and full α7 nicotinic acetylcholine receptor agonist, on meth self-administration and reinstatement in male Sprague-Dawley rats. Following indwelling jugular catheter surgery, rats were either trained to self-administer meth or saline on a variable ratio (VR) 3 schedule of reinforcement...
March 1, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/27936336/experiences-of-health-professionals-caring-for-people-presenting-to-the-emergency-department-after-taking-crystal-methamphetamine-ice
#18
Michelle Cleary, Debra Jackson, Cindy Woods, Rachel Kornhaber, Jan Sayers, Kim Usher
Globally, addiction to "ICE" (crystal methamphetamine) is increasing and presents emergency health care services personnel with a number of challenges. This paper reports the first of two major themes arising from a qualitative study investigating health professionals' experiences' managing people presenting to the Emergency Department (ED) after taking "ICE." The theme "Caring for people who use 'ICE' when presenting to EDs" comprises five subthemes. These are: (a) expecting the unexpected: "they're just off their heads"; (b) complexity of care: "underlying trauma and emotional dysregulation";...
January 2017: Issues in Mental Health Nursing
https://www.readbyqxmd.com/read/27930896/can-anxiety-tested-in-the-elevated-plus-maze-be-related-to-nociception-sensitivity-in-adult-male-rats
#19
Marie Pometlová, Anna Yamamotová, Kateryna Nohejlová, Romana Šlamberová
Methamphetamine (MA) is one of the most addictive psychostimulant drugs with a high potential for abuse. Our previous studies demonstrated that MA administered to pregnant rats increases pain sensitivity and anxiety in their adult offspring and makes them more sensitive to acute administration of the same drug in adulthood. Because individuals can differ considerably in terms of behaviour and physiology, such as rats that do not belong in some characteristics (e.g. anxiety) to average, can be described as low-responders or high-responders, are then more or less sensitive to pain...
2016: Prague Medical Report
https://www.readbyqxmd.com/read/27927042/pharmacological-treatments-for-methamphetamine-addiction-current-status-and-future-directions
#20
Javier Ballester, Gerald Valentine, Mehmet Sofuoglu
Methamphetamine (MA) abuse remains a global health challenge despite intense research interest in the development of pharmacological treatments. This review provides a summary of clinical trials and human studies on the pharmacotherapy of methamphetamine use disorder (MUD). Areas covered: We summarize published clinical trials that tested candidate medications for MUD and also conducted PubMed and Google Scholar searches to identify recently completed clinical trials using the keywords 'methamphetamine' 'addiction' 'pharmacotherapy' and 'clinical trial...
December 20, 2016: Expert Review of Clinical Pharmacology
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