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Addiction Biology

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https://www.readbyqxmd.com/read/28547821/effects-of-sleep-on-substance-use-in-adolescents-a-longitudinal-perspective
#1
Tam T Nguyen-Louie, Ty Brumback, Matthew J Worley, Ian M Colrain, Georg E Matt, Lindsay M Squeglia, Susan F Tapert
Substance use (SU) and sleep problems appear interrelated, but few studies have examined the influence of adolescent sleep patterns on development of SU disorders. This study prospectively examined the influence of sleep habits on subsequent SU in youth who later transitioned into heavy drinking. At time 1 (T1), participants (n = 95) were substance-naive 12- to 14-year-olds. Path-analytic models examined whether the effects of T1 risk factors (familial SU disorder, inhibition control, and externalizing and internalizing traits) on time 3 (M = 19...
May 26, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28497655/nicotine-self-administration-reverses-cognitive-deficits-in-a-rat-model-for-schizophrenia
#2
Uta Waterhouse, Katharine A Brennan, Bart A Ellenbroek
High comorbidity between schizophrenia and tobacco addiction has been well established. Explanatory theories include nicotine as a cognitive enhancer ameliorating symptoms of schizophrenia and underlying shared substrates increasing susceptibility to addiction in these individuals. To test these non-mutually exclusive theories, the maternal immune activation (MIA) model was utilized. To this end, pregnant Sprague Dawley rats were subcutaneously injected with a bacterial endotoxin, lipopolysaccharide (0.5 mg/kg), on gestation days 10 and 11...
May 12, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28474806/altered-interhemispheric-resting-state-functional-connectivity-in-young-male-smokers
#3
Dahua Yu, Kai Yuan, Yanzhi Bi, Lin Luo, Jinquan Zhai, Bo Liu, Yangding Li, Jiadong Cheng, Yanyan Guan, Ting Xue, Limei Bu, Shaoping Su, Yao Ma, Wei Qin, Jie Tian, Xiaoqi Lu
With the help of advanced neuroimaging approaches, previous studies revealed structural and functional brain changes in smokers compared with healthy non-smokers. Homotopic resting-state functional connectivity between the corresponding regions in cerebral hemispheres may help us to deduce the changes of functional coordination in the whole brain of young male smokers. Functional homotopy reflects an essential aspect of brain function and communication between the left and right cerebral hemispheres, which is important for the integrity of brain function...
May 5, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28436559/dopamine-d1-or-d2-receptor-expressing-neurons-in-the-central-nervous-system
#4
Xiaoyan Wei, Tengfei Ma, Yifeng Cheng, Cathy C Y Huang, Xuehua Wang, Jiayi Lu, Jun Wang
Dopamine signals mainly through D1 receptors (D1Rs) and D2 receptors (D2Rs); D1R-expressing or D2R-expressing neurons contribute to distinct reward and addictive behaviors. Traditionally, transgenic mice expressing green fluorescent protein (GFP) under D1R or D2R promoters are used for fluorescent verification in electrophysiology studies, whereas Cre mice are employed for behavioral research. However, it is unknown whether the same neuronal populations are targeted in GFP and Cre mice. Additionally, while D1Rs and D2Rs are known to be expressed in different striatal neurons, their expression patterns outside the striatum remain unclear...
April 24, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28429885/intravenous-self-administration-of-benzydamine-a-non-steroidal-anti-inflammatory-drug-with-a-central-cannabinoidergic-mechanism-of-action
#5
Riccardo Avvisati, Maria Meringolo, Emiliana Stendardo, Elisa Malavasi, Silvia Marinelli, Aldo Badiani
Benzydamine (BZY) is a non-steroidal anti-inflammatory drug used for the topical treatment of inflammations of the oral and vaginal mucosae. Virtually nothing is known about the central pharmacological actions of BZY. Yet there are reports of voluntary systemic overdosage of BZY in drug addicts, resulting in a euphoric, hallucinatory state. In the present study, we investigated the reinforcing properties of BZY in a rat self-administration paradigm. We found that BZY has a powerful reinforcing effect and that this effect is greatly facilitated in animals that already had substance experience, having previously self-administered heroin and cocaine, indicating cross sensitization between BZY and other common drugs of abuse...
April 21, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28429843/pooled-analysis-of-three-randomized-double-blind-placebo-controlled-trials-with-rimonabant-for-smoking-cessation
#6
Jason D Robinson, Paul M Cinciripini, Maher Karam-Hage, Henri-Jean Aubin, Lowell C Dale, Raymond Niaura, Robert M Anthenelli
Despite the withdrawal of CB1 antagonists, such as rimonabant, from the market and from active clinical development because of concerns about their side effect profiles, research suggests that the endocannabinoid system may play an important role in modulating nicotine's effects. We report the combined results, using a pooled analysis, of three previously unpublished trials assessing rimonabant as a smoking cessation pharmacotherapy conducted between 2002 and 2004. Smokers (n = 2097) motivated to quit were enrolled in three randomized, double-blind, placebo-controlled trials, STRATUS EU, US, and META, which consisted of a 10-week treatment period with either rimonabant 20 mg (n = 789), 5 mg (n = 518; used in only two of the three studies), or placebo (n = 790), in conjunction with brief counseling...
April 21, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28429835/levodopa-prevents-the-reinstatement-of-cocaine-self-administration-in-rats-via-potentiation-of-dopamine-release-in-the-medial-prefrontal-cortex
#7
Silvia Antinori, Liana Fattore, Pierluigi Saba, Walter Fratta, Gian Luigi Gessa, Paola Devoto
Dopamine agonists have been proposed as therapeutic tools for cocaine addiction. We have recently demonstrated that indirect dopamine agonists, including levodopa (L-DOPA), markedly increase cocaine-induced dopamine release in the medial prefrontal cortex (mPFC) of rats leading to the suppression of cocaine-seeking behavior. This study was aimed to understand the behavioral and neurochemical effects of L-DOPA on cocaine-taking and cocaine-seeking in rats. After reaching a stable pattern of intravenous cocaine self-administration under a continuous fixed ratio (FR-1) schedule of reinforcement, male rats were treated with L-DOPA at different steps of the self-administration protocol...
April 21, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28419649/a-paradigm-for-examining-stress-effects-on-alcohol-motivated-behaviors-in-participants-with-alcohol-use-disorder
#8
Mary E McCaul, Gary S Wand, Elise M Weerts, Xiaoqiang Xu
Although epidemiological research has shown an increase in drinking following stressors and trauma, limited paradigms have been validated to study the relationship between stress and drinking in the human laboratory. The current study developed a progressive ratio (PR) operant procedure to examine the effects of psychosocial stress on alcohol craving and several alcohol-motivated behaviors in persons with alcohol use disorder. Current heavy, nontreatment-seeking drinkers (N = 30) were media-recruited and completed a comprehensive assessment of recent drinking, mood and health...
April 17, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28419646/suvorexant-an-orexin-hypocretin-receptor-antagonist-attenuates-motivational-and-hedonic-properties-of-cocaine
#9
Taylor A Gentile, Steven J Simmons, David J Barker, Jessica K Shaw, Rodrigo A España, John W Muschamp
Orexins ('hypocretins') are peptides produced by neurons of the hypothalamus that project to structures implicated in reward and emotion processing. Converging evidence demonstrates functional roles of orexin signaling in arousal, sleep/wakefulness and motivated behaviors for natural and drug rewards. Suvorexant, a dual orexin receptor antagonist, recently received approval from the US Food and Drug Administration to treat insomnia. In Experiment 1, rats self-administered cocaine under a progressive-ratio schedule of reinforcement and the effects of suvorexant on motivation to self-administer cocaine were measured...
April 17, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28419642/nicotine-induced-molecular-alterations-are-modulated-by-gabab-receptor-activity
#10
Andres P Varani, Valeria T Pedrón, Amira J Aon, Christian Höcht, Gabriela B Acosta, Bernhard Bettler, Graciela N Balerio
It has been demonstrated that GABAB receptors modulate nicotine (NIC) reward effect; nevertheless, the mechanism implicated is not well known. In this regard, we evaluated the involvement of GABAB receptors on the behavioral, neurochemical, biochemical and molecular alterations associated with the rewarding effects induced by NIC in mice, from a pharmacological and genetic approach. NIC-induced rewarding properties (0.5 mg/kg, subcutaneously, sc) were evaluated by conditioned place preference (CPP) paradigm...
April 17, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28419776/the-involuntary-nature-of-binge-drinking-goal-directedness-and-awareness-of-intention
#11
Nuria Doñamayor, Daniela Strelchuk, Kwangyeol Baek, Paula Banca, Valerie Voon
Binge drinking represents a public health issue and is a known risk factor in the development of alcohol use disorders. Previous studies have shown behavioural as well as neuroanatomical alterations associated with binge drinking. Here, we address the question of the automaticity or involuntary nature of the behaviour by assessing goal-directed behaviour and intentionality. In this study, we used a computational two-step task, designed to discern between model-based/goal-directed and model-free/habitual behaviours, and the classic Libet clock task, to study intention awareness, in a sample of 31 severe binge drinkers (BD) and 35 matched healthy volunteers...
April 16, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28401670/adolescents-behavioral-and-neural-responses-to-e-cigarette-advertising
#12
Yvonnes Chen, Carina H Fowler, Vlad B Papa, Rebecca J Lepping, Morgan G Brucks, Andrew T Fox, Laura E Martin
Although adolescents are a group heavily targeted by the e-cigarette industry, research in cue-reactivity has not previously examined adolescents' behavioral and neural responses to e-cigarette advertising. This study addressed this gap through two experiments. In Experiment One, adult traditional cigarette smokers (n = 41) and non-smokers (n = 41) answered questions about e-cigarette and neutral advertising images. The 40 e-cigarette advertising images that most increased desire to use the product were matched to 40 neutral advertising images with similar content...
April 11, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28349660/intra-prelimbic-cortical-inhibition-of-striatal-enriched-tyrosine-phosphatase-suppresses-cocaine-seeking-in-rats
#13
Ben M Siemsen, Paul J Lombroso, Jacqueline F McGinty
Cocaine self-administration in rats results in dysfunctional neuroadaptations in the prelimbic (PrL) cortex during early abstinence. Central to these adaptations is decreased phospho-extracellular signal-regulated kinase (p-ERK), which plays a key role in cocaine seeking. Normalizing ERK phosphorylation in the PrL cortex immediately after cocaine self-administration decreases subsequent cocaine seeking. The disturbance in ERK phosphorylation is accompanied by decreased phosphorylation of striatal-enriched protein tyrosine phosphatase (STEP), indicating increased STEP activity...
March 28, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28271626/acupuncture-reduces-relapse-to-cocaine-seeking-behavior-via-activation-of-gaba-neurons-in-the-ventral-tegmental-area
#14
Wyju Jin, Min Sun Kim, Eun Young Jang, Jun Yeon Lee, Jin Gyeom Lee, Hong Yu Kim, Seong Shoon Yoon, Bong Hyo Lee, Suchan Chang, Jae Hyo Kim, Kwang H Choi, Ho Koo, Young Seob Gwak, Scott C Steffensen, Yeon-Hee Ryu, Hee Young Kim, Chae Ha Yang
There is growing public interest in alternative approaches to addiction treatment and scientific interest in elucidating the neurobiological underpinnings of acupuncture. Our previous studies showed that acupuncture at a specific Shenmen (HT7) points reduced dopamine (DA) release in the nucleus accumbens (NAc) induced by drugs of abuse. The present study was carried out to evaluate the effects of HT7 acupuncture on γ-aminobutyric acid (GABA) neuronal activity in the ventral tegmental area (VTA) and the reinstatement of cocaine-seeking behavior...
March 7, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28247526/naltrexone-ameliorates-functional-network-abnormalities-in-alcohol-dependent-individuals
#15
Laurel S Morris, Kwangyeol Baek, Roger Tait, Rebecca Elliott, Karen D Ersche, Remy Flechais, John McGonigle, Anna Murphy, Liam J Nestor, Csaba Orban, Filippo Passetti, Louise M Paterson, Ilan Rabiner, Laurence Reed, Dana Smith, John Suckling, Eleanor M Taylor, Edward T Bullmore, Anne R Lingford-Hughes, Bill Deakin, David J Nutt, Barbara J Sahakian, Trevor W Robbins, Valerie Voon
Naltrexone, an opioid receptor antagonist, is commonly used as a relapse prevention medication in alcohol and opiate addiction, but its efficacy and the mechanisms underpinning its clinical usefulness are not well characterized. In the current study, we examined the effects of 50-mg naltrexone compared with placebo on neural network changes associated with substance dependence in 21 alcohol and 36 poly-drug-dependent individuals compared with 36 healthy volunteers. Graph theoretic and network-based statistical analysis of resting-state functional magnetic resonance imaging (MRI) data revealed that alcohol-dependent subjects had reduced functional connectivity of a dispersed network compared with both poly-drug-dependent and healthy subjects...
February 28, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28247455/on-the-relationships-in-rhesus-macaques-between-chronic-ethanol-consumption-and-the-brain-transcriptome
#16
Ovidiu D Iancu, Alexander Colville, Nicole A R Walter, Priscila Darakjian, Denesa L Oberbeck, James B Daunais, Christina L Zheng, Robert P Searles, Shannon K McWeeney, Kathleen A Grant, Robert Hitzemann
This is the first description of the relationship between chronic ethanol self-administration and the brain transcriptome in a non-human primate (rhesus macaque). Thirty-one male animals self-administered ethanol on a daily basis for over 12 months. Gene transcription was quantified with RNA-Seq in the central nucleus of the amygdala (CeA) and cortical Area 32. We constructed coexpression and cosplicing networks, and we identified areas of preservation and areas of differentiation between regions and network types...
February 28, 2017: Addiction Biology
https://www.readbyqxmd.com/read/28398011/striatal-activation-and-frontostriatal-connectivity-during-non-drug-reward-anticipation-in-alcohol-dependence
#17
Alena Becker, Martina Kirsch, Martin Fungisai Gerchen, Falk Kiefer, Peter Kirsch
According to prevailing neurobiological theories of addiction, altered function in neural reward circuitry is a central mechanism of alcohol dependence. Growing evidence postulates that the ventral striatum (VS), as well as areas of the prefrontal cortex, contribute to the increased incentive salience of alcohol-associated cues, diminished motivation to pursue non-drug rewards and weakened strength of inhibitory cognitive control, which are central to addiction. The present study aims to investigate the neural response and functional connectivity underlying monetary, non-drug reward processing in alcohol dependence...
May 2017: Addiction Biology
https://www.readbyqxmd.com/read/28398010/effects-of-drugs-of-abuse-on-the-central-neuropeptide-y-system
#18
(no author information available yet)
No abstract text is available yet for this article.
May 2017: Addiction Biology
https://www.readbyqxmd.com/read/26833913/expression-of-functional-cannabinoid-cb2-receptor-in-vta-dopamine-neurons-in-rats
#19
Hai-Ying Zhang, Ming Gao, Hui Shen, Guo-Hua Bi, Hong-Ju Yang, Qing-Rong Liu, Jie Wu, Eliot L Gardner, Antonello Bonci, Zheng-Xiong Xi
We have recently reported the expression of functional cannabinoid CB2 receptors (CB2 Rs) in midbrain dopamine (DA) neurons in mice. However, little is known whether CB2 Rs are similarly expressed in rat brain because significant species differences in CB2 R structures and expression are found. In situ hybridization and immunohistochemical assays detected CB2 gene and receptors in DA neurons of the ventral tegmental area (VTA), which was up-regulated in cocaine self-administration rats. Electrophysiological studies demonstrated that activation of CB2 Rs by JWH133 inhibited VTA DA neuronal firing in single dissociated neurons...
May 2017: Addiction Biology
https://www.readbyqxmd.com/read/26833865/adult-rat-cortical-thickness-changes-across-age-and-following-adolescent-intermittent-ethanol-treatment
#20
Ryan P Vetreno, Richard Yaxley, Beatriz Paniagua, G Allan Johnson, Fulton T Crews
Human studies have established that adolescence is a period of brain maturation that parallels the development of adult behaviors. However, little is known regarding cortical development in the adult rat brain. We used magnetic resonance imaging (MRI) and histology to assess the impact of age on adult Wistar rat cortical thickness on postnatal day (P)80 and P220 as well as the effect of adolescent binge ethanol exposure on adult (P80) cortical thickness. MRI revealed changes in cortical thickness between P80 and P220 that differ across cortical region...
May 2017: Addiction Biology
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