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Sampedro-Piquero P, Ladrón de Guevara-Miranda D, Pavón FJ, Serrano A, Suárez J, Rodríguez de Fonseca F, Santín LJ, Castilla-Ortega E. Neuroplastic and cognitive impairment in substance use disorders: a therapeutic potential of cognitive stimulation. Neurosci Biobehav Rev 2019; 106:23-48. [DOI: 10.1016/j.neubiorev.2018.11.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 10/15/2018] [Accepted: 11/23/2018] [Indexed: 01/08/2023]
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Is (poly-) substance use associated with impaired inhibitory control? A mega-analysis controlling for confounders. Neurosci Biobehav Rev 2019; 105:288-304. [DOI: 10.1016/j.neubiorev.2019.07.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 06/10/2019] [Accepted: 07/07/2019] [Indexed: 12/25/2022]
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Bechara A, Berridge KC, Bickel WK, Morón JA, Williams SB, Stein JS. A Neurobehavioral Approach to Addiction: Implications for the Opioid Epidemic and the Psychology of Addiction. Psychol Sci Public Interest 2019; 20:96-127. [PMID: 31591935 PMCID: PMC7001788 DOI: 10.1177/1529100619860513] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Two major questions about addictive behaviors need to be explained by any worthwhile neurobiological theory. First, why do people seek drugs in the first place? Second, why do some people who use drugs seem to eventually become unable to resist drug temptation and so become "addicted"? We will review the theories of addiction that address negative-reinforcement views of drug use (i.e., taking opioids to alleviate distress or withdrawal), positive-reinforcement views (i.e., taking drugs for euphoria), habit views (i.e., growth of automatic drug-use routines), incentive-sensitization views (i.e., growth of excessive "wanting" to take drugs as a result of dopamine-related sensitization), and cognitive-dysfunction views (i.e., impaired prefrontal top-down control), including those involving competing neurobehavioral decision systems (CNDS), and the role of the insula in modulating addictive drug craving. In the special case of opioids, particular attention is paid to whether their analgesic effects overlap with their reinforcing effects and whether the perceived low risk of taking legal medicinal opioids, which are often prescribed by a health professional, could play a role in the decision to use. Specifically, we will address the issue of predisposition or vulnerability to becoming addicted to drugs (i.e., the question of why some people who experiment with drugs develop an addiction, while others do not). Finally, we review attempts to develop novel therapeutic strategies and policy ideas that could help prevent opioid and other substance abuse.
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Affiliation(s)
- Antoine Bechara
- Department of Psychology, University of Southern California
- Brain and Creativity Institute, University of Southern California
| | | | - Warren K. Bickel
- Addiction Recovery Research Center & Center for Transformational Research on Health Behaviors, Fralin Biomedical Research Institute at Virginia Tech Carilion, Roanoke, Virginia
| | - Jose A. Morón
- Department of Anesthesiology, Washington University School of Medicine
- Washington University Pain Center, Washington University School of Medicine
| | - Sidney B. Williams
- Department of Anesthesiology, Washington University School of Medicine
- Washington University Pain Center, Washington University School of Medicine
| | - Jeffrey S. Stein
- Addiction Recovery Research Center & Center for Transformational Research on Health Behaviors, Fralin Biomedical Research Institute at Virginia Tech Carilion, Roanoke, Virginia
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Zheng H, Hu Y, Wang Z, Wang M, Du X, Dong G. Meta-analyses of the functional neural alterations in subjects with Internet gaming disorder: Similarities and differences across different paradigms. Prog Neuropsychopharmacol Biol Psychiatry 2019; 94:109656. [PMID: 31145927 DOI: 10.1016/j.pnpbp.2019.109656] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 04/18/2019] [Accepted: 05/21/2019] [Indexed: 02/06/2023]
Abstract
Internet gaming disorder (IGD) has become a global public health concern due to its increasing prevalence and potential negative consequences. Researchers have sought to identify which brain regions are associated with this disorder. However, inconsistent results have been reported among studies due to the heterogeneity of paradigms and subjects. The present research aimed to combine the results of individual studies to provide a more coherent and powerful explanation. By selecting 40 studies utilizing a qualified whole-brain analysis, we performed a comprehensive series of meta-analyses that employed seed-based d mapping. We divided the existing experimental paradigms into 3 categories: game-related cue-reactivity, executive control, and risk-reward-related decision-making tasks. We divided all studies into three subgroups according to their paradigms. In cue-reactivity tasks, patients with IGD exhibited significant hyperactivation in the bilateral precuneus and bilateral cingulate and significant hypoactivation in the insula, but there were no differences in the striatum. In executive control tasks, patients with IGD displayed significant hyperactivation in the right superior temporal gyrus, bilateral precuneus, bilateral cingulate, and insula and hypoactivation in the left inferior frontal gyrus. In risky decision-making paradigms, IGD patients exhibited significant hyperactivation in the left striatum, right inferior frontal gyrus, and insula and hypoactivation in the left superior frontal gyrus, left inferior frontal gyrus, and right precentral gyrus. Our study aimed to discover the similarities among all studies and to explore the uniqueness of the different paradigms. This study further confirmed the critical role of reward circuitry and executive control circuitry in IGD but not under all conditions.
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Affiliation(s)
- Hui Zheng
- Center for Cognition and Brain Disorders, Hangzhou Normal University, Hangzhou, Zhejiang Province 311121, PR China; Shanghai Key Laboratory of Psychotic disorders, Shanghai Mental Health Center, Shanghai Jiaotong University School of Medicine, Shanghai, PR China
| | - Yanbo Hu
- Department of Psychology, London Metropolitan University, London N7 8DB, UK
| | - Ziliang Wang
- School of Psychology, Beijing Normal University, Beijing 10010, PR China
| | - Min Wang
- Center for Cognition and Brain Disorders, Hangzhou Normal University, Hangzhou, Zhejiang Province 311121, PR China
| | - Xiaoxia Du
- Department of Physics, Shanghai Key Laboratory of Magnetic Resonance, East China Normal University, Shanghai, PR China
| | - Guangheng Dong
- Center for Cognition and Brain Disorders, Hangzhou Normal University, Hangzhou, Zhejiang Province 311121, PR China; Zhejiang Key Laboratory for Assessment of Cognitive Impairments, Hangzhou, Zhejiang Province, PR China.
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Zilverstand A, Huang AS, Alia-Klein N, Goldstein RZ. Neuroimaging Impaired Response Inhibition and Salience Attribution in Human Drug Addiction: A Systematic Review. Neuron 2019; 98:886-903. [PMID: 29879391 DOI: 10.1016/j.neuron.2018.03.048] [Citation(s) in RCA: 280] [Impact Index Per Article: 56.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 03/09/2018] [Accepted: 03/27/2018] [Indexed: 12/27/2022]
Abstract
The impaired response inhibition and salience attribution (iRISA) model proposes that impaired response inhibition and salience attribution underlie drug seeking and taking. To update this model, we systematically reviewed 105 task-related neuroimaging studies (n > 15/group) published since 2010. Results demonstrate specific impairments within six large-scale brain networks (reward, habit, salience, executive, memory, and self-directed networks) during drug cue exposure, decision making, inhibitory control, and social-emotional processing. Addicted individuals demonstrated increased recruitment of these networks during drug-related processing but a blunted response during non-drug-related processing, with the same networks also being implicated during resting state. Associations with real-life drug use, relapse, therapeutic interventions, and the relevance to initiation of drug use during adolescence support the clinical relevance of the results. Whereas the salience and executive networks showed impairments throughout the addiction cycle, the reward network was dysregulated at later stages of abuse. Effects were similar in alcohol, cannabis, and stimulant addiction.
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Affiliation(s)
- Anna Zilverstand
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Anna S Huang
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Nelly Alia-Klein
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Rita Z Goldstein
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
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Grzywacz A, Chmielowiec J, Chmielowiec K, Mroczek B, Masiak J, Suchanecka A, Sipak-Szmigiel O, Szumilas K, Trybek G. The Ankyrin Repeat and Kinase Domain Containing 1 Gene Polymorphism ( ANKK1 Taq1A) and Personality Traits in Addicted Subjects. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16152687. [PMID: 31357601 PMCID: PMC6695683 DOI: 10.3390/ijerph16152687] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 07/24/2019] [Accepted: 07/26/2019] [Indexed: 11/17/2022]
Abstract
The Taq1A polymorphism located in the ANKK1 gene is one of the most widely studied polymorphisms in regards to the genetics of behavior and addiction. The aim of our study was to analyze this polymorphism with regard to personality characteristics and anxiety measured by means of the Personality Inventory—(NEO Five-Factor Inventory—NEO—FFI) and the State-Trait Anxiety Inventory (STAI) in polysubstance addicted subjects. The study group consisted of 600 male volunteers, including 299 addicted subjects and 301 controls. Psychiatrists recruited members for both groups. Addiction was diagnosed in the case group. In the control group mental illness was excluded. The same psychometric test and genotyping using the real-time PCR (polymerase chain reaction) method was performed for both groups. The results were investigated by means of multivariate analysis of the main effects Multi-factor ANOVA. Significantly higher scores on the scale of STAI state and Neuroticism and Openness traits, as well as lower scores on the scales of Extraversion, Agreeability, and Conscientiousness, were found in the case group subjects, compared to the controls. Differences in frequency of genotypes and alleles of Taq1A polymorphism between the studied groups were not found. Multi-factor ANOVA of addicted subjects and control subjects and the ANKK1 Taq1A variant interaction approximated the statistical significance for the STAI state. The main effects ANOVA of both subjects’ groups were found for the STAI state and trait, the Neuroticism scale, the Extraversion scale, and the Agreeability scale. The ANKK1 Taq1A main effects approximated the statistical significance of the STAI trait. Our study shows not only differences in personality traits between addicted and non-addicted subjects, but also the possible impact of ANKK1 on given traits and on addiction itself.
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Affiliation(s)
- Anna Grzywacz
- Independent Laboratory of Health Promotion of the Pomeranian Medical University in Szczecin, 11 Chlapowskiego St., 70-204 Szczecin, Poland.
| | - Jolanta Chmielowiec
- Department of Hygiene and Epidemiology, Faculty of Medicine and Health Science, University of Zielona Góra, 28 Zyty St., 65-046 Zielona Góra, Poland
| | - Krzysztof Chmielowiec
- Department of Hygiene and Epidemiology, Faculty of Medicine and Health Science, University of Zielona Góra, 28 Zyty St., 65-046 Zielona Góra, Poland
| | - Bożena Mroczek
- Department of Human Sciences in Medicine, Pomeranian Medical University in Szczecin, 11 Chlapowskiego St., 70-204 Szczecin, Poland
| | - Jolanta Masiak
- Neurophysiological Independent Unit, Department of Psychiatry, Medical University of Lublin, 1 Aleje Racławickie St., 20-059 Lublin, Poland
| | - Aleksandra Suchanecka
- Independent Laboratory of Health Promotion of the Pomeranian Medical University in Szczecin, 11 Chlapowskiego St., 70-204 Szczecin, Poland
| | - Olimpia Sipak-Szmigiel
- Department of Obstetrics and Pathology of Pregnancy, Pomeranian Medical University in Szczecin, 48 Żołnierska St., 71-210 Szczecin, Poland
| | - Kamila Szumilas
- Department of General Pathology, Pomeranian Medical University, Szczecin 70-111, Poland
| | - Grzegorz Trybek
- Department of Oral Surgery, Pomeranian Medical University in Szczecin, 72 Powstańców Wlkp. St., 70-111 Szczecin, Poland
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Knockdown of the histone di-methyltransferase G9a in nucleus accumbens shell decreases cocaine self-administration, stress-induced reinstatement, and anxiety. Neuropsychopharmacology 2019; 44:1370-1376. [PMID: 30587852 PMCID: PMC6785019 DOI: 10.1038/s41386-018-0305-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 12/06/2018] [Accepted: 12/16/2018] [Indexed: 12/18/2022]
Abstract
Comorbid neuropsychiatric disorders such as addiction and anxiety could involve common underlying mechanisms. One potential mechanism involves epigenetic regulation of histone 3 dimethylation at lysine 9 residues (H3K9me2) by the histone dimethyltransferase G9a. Here we provide evidence that local AAV-RNAi-mediated knockdown of G9a expression in nucleus accumbens shell (NAcSh) of male rats reduces both addictive-related and anxiety-related behaviors. Specifically, G9a knockdown reduces sensitivity to low dose cocaine reinforcement when cocaine is freely available (fixed ratio schedule). Similarly, G9a knockdown reduces motivation for cocaine under higher effort demands (progressive ratio schedule). Following several weeks of forced abstinence, G9a knockdown attenuates extinction responding and reinstatement triggered by either cocaine-priming injections or footshock stress. This decrease in addictive behavior is associated with a long-term reduction in anxiety-like behavior as measured by the elevated plus maze (EPM). G9a knockdown also reduces basal anxiety-like behavior in EPM and marble burying tests in drug-naïve rats. These results complement our previous work showing that increased G9a expression in NAcSh enhances addictive-related and anxiety-related behaviors, indicating that G9a bi-directionally controls these responses. These results also suggest that regulation of G9a-influenced gene expression could be a common epigenetic mechanism for co-morbid anxiety and psychostimulant addiction.
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Zhou YQ, Zhang LY, Yu ZP, Zhang XQ, Shi J, Shen HW. Tropisetron Facilitates Footshock Suppression of Compulsive Cocaine Seeking. Int J Neuropsychopharmacol 2019; 22:574-584. [PMID: 31125405 PMCID: PMC6754734 DOI: 10.1093/ijnp/pyz023] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 04/25/2019] [Accepted: 05/23/2019] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND The hallmark characteristics of the murine model of drug addiction include the escalation of cocaine consumption and compulsive punishment-resistant drug seeking. In this study, we evaluated the motivation for drug seeking in cocaine self-administering rats exposed to an escalated dosing regimen that endeavored to mimic the characteristic of escalating drug intake in human addicts. Tropisetron is a 5-HT3 receptor antagonist and α7-nicotinic receptor partial agonist. Utilizing rats trained on the escalated-dosing regimen, we examined the effects of tropisetron on control over compulsive drug-seeking behavior that was defined as footshock-resistant lever pressing. METHODS Rats were trained to self-administer cocaine with incremental-infusion doses (from 0.6 to 2.4 mg/kg/infusion) across training sessions (3 h/session) or with a long-access paradigm (i.e., 0.6 mg/kg/infusion, 6 h/d training session). The drug-seeking motivations of 2 groups were estimated by the patterns of drug intake and progressive-ratio schedule. The compulsivity for drug seeking of the group with an escalated dose was further evaluated using the footshock-associated seeking-taking chain task. RESULTS The rats trained on the dose-escalated protocol achieved the same levels of motivated drug seeking as those subjected to a long-access paradigm, as indicated by cocaine intake per training session and breakpoints on a progressive ratio schedule. Tropisetron attenuated compulsive behavior of rats when pressing of the seeking lever potentially led to footshock. Intriguingly, tropisetron did not change the motivation to seek cocaine when footshock was absent. Tropisetron had no effect on locomotor activities or saccharin self-administration. CONCLUSIONS These results demonstrate that tropisetron restored control over compulsive cocaine seeking, and they indicate that 5-HT3/α7-nicotinic receptors may be potential therapeutic targets for relieving compulsive drug seeking.
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Affiliation(s)
- Yue-Qing Zhou
- Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Lan-Yuan Zhang
- Department of Pharmacology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Zhi-Peng Yu
- Department of Pharmacology, Medical School of Ningbo University, WangChanglai, Ningbo, Zhejiang, China
| | - Xiao-Qin Zhang
- Department of Pharmacology, Medical School of Ningbo University, WangChanglai, Ningbo, Zhejiang, China
| | - Jie Shi
- National Institute on Drug Dependence, Peking University, Beijing, China,Correspondence: H. W. Shen, PhD, Department of Pharmacology, 818 Fenghua Rd., WangChanglai A403, Ningbo, Zhejiang 315211, China (); and J. Shi, PhD, National Institute on Drug Dependence, Peking University, Beijing, China ()
| | - Hao-Wei Shen
- Department of Pharmacology, Medical School of Ningbo University, WangChanglai, Ningbo, Zhejiang, China,Correspondence: H. W. Shen, PhD, Department of Pharmacology, 818 Fenghua Rd., WangChanglai A403, Ningbo, Zhejiang 315211, China (); and J. Shi, PhD, National Institute on Drug Dependence, Peking University, Beijing, China ()
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59
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Fouyssac M, Belin D. Beyond drug-induced alteration of glutamate homeostasis, astrocytes may contribute to dopamine-dependent intrastriatal functional shifts that underlie the development of drug addiction: A working hypothesis. Eur J Neurosci 2019; 50:3014-3027. [PMID: 30968489 PMCID: PMC6852203 DOI: 10.1111/ejn.14416] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 03/18/2019] [Accepted: 03/26/2019] [Indexed: 12/30/2022]
Abstract
The transition from recreational drug use to compulsive drug‐seeking habits, the hallmark of addiction, has been shown to depend on a shift in the locus of control over behaviour from the ventral to the dorsolateral striatum. This process has hitherto been considered to depend on the aberrant engagement of dopamine‐dependent plasticity processes within neuronal networks. However, exposure to drugs of abuse also triggers cellular and molecular adaptations in astrocytes within the striatum which could potentially contribute to the intrastriatal transitions observed during the development of drug addiction. Pharmacological interventions aiming to restore the astrocytic mechanisms responsible for maintaining homeostatic glutamate concentrations in the nucleus accumbens, that are altered by chronic exposure to addictive drugs, abolish the propensity to relapse in both preclinical and, to a lesser extent, clinical studies. Exposure to drugs of abuse also alters the function of astrocytes in the dorsolateral striatum, wherein dopaminergic mechanisms control drug‐seeking habits, associated compulsivity and relapse. This suggests that drug‐induced alterations in the glutamatergic homeostasis maintained by astrocytes throughout the entire striatum may interact with dopaminergic mechanisms to promote aberrant plasticity processes that contribute to the maintenance of maladaptive drug‐seeking habits. Capitalising on growing evidence that astrocytes play a fundamental regulatory role in glutamate and dopamine transmission in the striatum, we present an innovative model of a quadripartite synaptic microenvironment within which astrocytes channel functional interactions between the dopaminergic and glutamatergic systems that may represent the primary striatal functional unit that undergoes drug‐induced adaptations eventually leading to addiction.
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Affiliation(s)
- Maxime Fouyssac
- Department of Psychology, University of Cambridge, Cambridge, UK
| | - David Belin
- Department of Psychology, University of Cambridge, Cambridge, UK
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60
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Zhou X, Zimmermann K, Xin F, Zhao W, Derckx RT, Sassmannshausen A, Scheele D, Hurlemann R, Weber B, Kendrick KM, Becker B. Cue Reactivity in the Ventral Striatum Characterizes Heavy Cannabis Use, Whereas Reactivity in the Dorsal Striatum Mediates Dependent Use. BIOLOGICAL PSYCHIATRY: COGNITIVE NEUROSCIENCE AND NEUROIMAGING 2019; 4:751-762. [PMID: 31204249 DOI: 10.1016/j.bpsc.2019.04.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 03/22/2019] [Accepted: 04/08/2019] [Indexed: 02/06/2023]
Abstract
BACKGROUND Animal models of addiction suggest that the transition from incentive-driven drug use to habitual and ultimately compulsive drug use is mediated by a shift from ventral to dorsal striatal cue control over drug seeking. Previous studies in human cannabis users reported elevated trait impulsivity and neural cue reactivity in striatal circuits; however, these studies were not able to separate addiction-related from exposure-related adaptations. METHODS To differentiate the adaptive changes, the current functional magnetic resonance imaging study examined behavioral and neural cue reactivity in dependent (n = 18) and nondependent (n = 20) heavy cannabis users and a nonusing reference group (n = 44). RESULTS Irrespective of dependence status, cannabis users demonstrated elevated trait impulsivity as well as increased ventral striatal reactivity and striatal frontal coupling in response to drug cues. Dependent users selectively exhibited dorsal striatal reactivity and decreased striatal limbic coupling during cue exposure. An exploratory analysis revealed that higher ventral caudate neural cue reactivity was associated with stronger cue-induced arousal and craving in dependent users, whereas this pattern was reversed in nondependent users. CONCLUSIONS Taken together, the current findings suggest that exaggerated responses of the ventral striatal reward system may promote excessive drug use in humans, whereas adaptations in dorsal striatal systems engaged in habit formation may promote the transition to addictive use.
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Affiliation(s)
- Xinqi Zhou
- The Clinical Hospital of Chengdu Brain Science Institute, MOE Key Laboratory for Neuroinformation, University of Electronic Science and Technology of China, Chengdu, China
| | - Kaeli Zimmermann
- Division of Medical Psychology, Department of Psychiatry, University of Bonn, Bonn, Germany
| | - Fei Xin
- The Clinical Hospital of Chengdu Brain Science Institute, MOE Key Laboratory for Neuroinformation, University of Electronic Science and Technology of China, Chengdu, China
| | - Weihua Zhao
- The Clinical Hospital of Chengdu Brain Science Institute, MOE Key Laboratory for Neuroinformation, University of Electronic Science and Technology of China, Chengdu, China
| | - Roelinka T Derckx
- Division of Medical Psychology, Department of Psychiatry, University of Bonn, Bonn, Germany
| | - Anja Sassmannshausen
- Division of Medical Psychology, Department of Psychiatry, University of Bonn, Bonn, Germany
| | - Dirk Scheele
- Division of Medical Psychology, Department of Psychiatry, University of Bonn, Bonn, Germany
| | - Rene Hurlemann
- Division of Medical Psychology, Department of Psychiatry, University of Bonn, Bonn, Germany
| | - Bernd Weber
- Center for Economics and Neuroscience, Department of Epileptology, University of Bonn, Bonn, Germany; Department of Neurocognition, Life & Brain Center, Bonn, Germany
| | - Keith M Kendrick
- The Clinical Hospital of Chengdu Brain Science Institute, MOE Key Laboratory for Neuroinformation, University of Electronic Science and Technology of China, Chengdu, China
| | - Benjamin Becker
- The Clinical Hospital of Chengdu Brain Science Institute, MOE Key Laboratory for Neuroinformation, University of Electronic Science and Technology of China, Chengdu, China.
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Ruiz MJ, Colzato LS, Bajo MT, Paolieri D. Increased picture-word interference in chronic and recreational users of cocaine. Hum Psychopharmacol 2019; 34:e2689. [PMID: 30762913 DOI: 10.1002/hup.2689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 11/12/2018] [Accepted: 01/08/2019] [Indexed: 11/11/2022]
Abstract
OBJECTIVE The correct production of speech depends on the effective use of inhibitory control. Cocaine abuse has been linked to impaired inhibition in the verbal and nonverbal domains. The aim of this study was to evaluate the possible impairment of the inhibitory control process engaged in the production of language among chronic cocaine users, both in rehabilitation and recreational contexts. METHOD Researchers obtained an index of semantic interference from a picture-word task performed by chronic cocaine users in rehabilitation (Experiment 1) and recreational cocaine polydrug users (Experiment 2). Cocaine users in both groups were matched for age and intelligence with cocaine-free health controls. Performance on the picture-word task was analyzed by repeated-measures analyses of variance. RESULTS Both groups of cocaine users showed significantly more semantic interference than their respective cocaine-free control group. These results suggest a deficit in the ability to inhibit interfering information. CONCLUSIONS The present findings suggest that cocaine use, even at recreational levels, is associated with specific impairments in the inhibitory mechanism that reduces the activation of overt competing responses in language production. This impairment results in the inefficient avoidance of irrelevant information, inducing errors and slower responses during the production of spoken language.
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Affiliation(s)
- Manuel J Ruiz
- Mind, Brain and Behavior Research Center (CIMCYC), Department of Experimental Psychology, University of Granada, Granada, Spain
| | - Lorenza S Colzato
- Leiden Institute for Brain and Cognition, Leiden University, Leiden, The Netherlands.,Institute of Cognitive Neuroscience, Ruhr University, Bochum, Germany.,Institute for Sports and Sport Science, University of Kassel, Kassel, Germany
| | - María Teresa Bajo
- Mind, Brain and Behavior Research Center (CIMCYC), Department of Experimental Psychology, University of Granada, Granada, Spain
| | - Daniela Paolieri
- Mind, Brain and Behavior Research Center (CIMCYC), Department of Experimental Psychology, University of Granada, Granada, Spain
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Butler K, Le Foll B. Impact of Substance Use Disorder Pharmacotherapy on Executive Function: A Narrative Review. Front Psychiatry 2019; 10:98. [PMID: 30881320 PMCID: PMC6405638 DOI: 10.3389/fpsyt.2019.00098] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 02/11/2019] [Indexed: 12/20/2022] Open
Abstract
Substance use disorders are chronic, relapsing, and harmful conditions characterized by executive dysfunction. While there are currently no approved pharmacotherapy options for stimulant and cannabis use disorders, there are several evidence-based options available to help reduce symptoms during detoxification and aid long-term cessation for those with tobacco, alcohol and opioid use disorders. While these medication options have shown clinical efficacy, less is known regarding their potential to enhance executive function. This narrative review aims to provide a brief overview of research that has investigated whether commonly used pharmacotherapies for these substance use disorders (nicotine, bupropion, varenicline, disulfiram, acamprosate, nalmefene, naltrexone, methadone, buprenorphine, and lofexidine) effect three core executive function components (working memory, inhibitory control and cognitive flexibility). While pharmacotherapy-induced enhancement of executive function may improve cessation outcomes in dependent populations, there are limited and inconsistent findings regarding the effects of these medications on executive function. We discuss possible reasons for the mixed findings and suggest some future avenues of work that may enhance the understanding of addiction pharmacotherapy and cognitive training interventions and lead to improved patient outcomes.
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Affiliation(s)
- Kevin Butler
- Translational Addiction Research Laboratory, Centre for Addiction and Mental Health, University of Toronto, Toronto, ON, Canada
| | - Bernard Le Foll
- Translational Addiction Research Laboratory, Centre for Addiction and Mental Health, University of Toronto, Toronto, ON, Canada
- Alcohol Research and Treatment Clinic, Acute Care Program, Centre for Addiction and Mental Health, Toronto, ON, Canada
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada
- Department of Family and Community Medicine, University of Toronto, Toronto, ON, Canada
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
- Division of Brain and Therapeutics, Department of Psychiatry, University of Toronto, Toronto, ON, Canada
- Institute of Medical Sciences, University of Toronto, Toronto, ON, Canada
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Just AL, Meng C, Smith DG, Bullmore ET, Robbins TW, Ersche KD. Effects of familial risk and stimulant drug use on the anticipation of monetary reward: an fMRI study. Transl Psychiatry 2019; 9:65. [PMID: 30718492 PMCID: PMC6362203 DOI: 10.1038/s41398-019-0399-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 10/19/2018] [Accepted: 12/09/2018] [Indexed: 12/12/2022] Open
Abstract
The association between stimulant drug use and aberrant reward processing is well-documented in the literature, but the nature of these abnormalities remains elusive. The present study aims to disentangle the separate and interacting effects of stimulant drug use and pre-existing familial risk on abnormal reward processing associated with stimulant drug addiction. We used the Monetary Incentive Delay task, a well-validated measure of reward processing, during fMRI scanning in four distinct groups: individuals with familial risk who were either stimulant drug-dependent (N = 41) or had never used stimulant drugs (N = 46); and individuals without familial risk who were either using stimulant drugs (N = 25) or not (N = 48). We first examined task-related whole-brain activation followed by a psychophysiological interaction analysis to further explore brain functional connectivity. For analyses, we used a univariate model with two fixed factors (familial risk and stimulant drug use). Our results showed increased task-related activation in the putamen and motor cortex of stimulant-using participants. We also found altered task-related functional connectivity between the putamen and frontal regions in participants with a familial risk (irrespective of whether they were using stimulant drugs or not). Additionally, we identified an interaction between stimulant drug use and familial risk in task-related functional connectivity between the putamen and motor-related cortical regions in potentially at-risk individuals. Our findings suggest that abnormal task-related activation in motor brain systems is associated with regular stimulant drug use, whereas abnormal task-related functional connectivity in frontostriatal brain systems, in individuals with familial risk, may indicate pre-existing neural vulnerability for developing addiction.
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Affiliation(s)
- Alanna L. Just
- 0000000121885934grid.5335.0Departments of Psychiatry and Psychology, University of Cambridge, Cambridge, UK ,0000000121885934grid.5335.0Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK
| | - Chun Meng
- 0000000121885934grid.5335.0Departments of Psychiatry and Psychology, University of Cambridge, Cambridge, UK ,0000000121885934grid.5335.0Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK
| | - Dana G. Smith
- 0000000121885934grid.5335.0Departments of Psychiatry and Psychology, University of Cambridge, Cambridge, UK ,0000000121885934grid.5335.0Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK
| | - Edward T. Bullmore
- 0000000121885934grid.5335.0Departments of Psychiatry and Psychology, University of Cambridge, Cambridge, UK ,0000000121885934grid.5335.0Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK ,0000 0004 0412 9303grid.450563.1Cambridgeshire and Peterborough NHS Foundation Trust, Cambridge, UK ,0000 0001 2162 0389grid.418236.aGlaxoSmithKline, Immuno-Inflammation Therapeutic Area Unit, Stevenage, UK
| | - Trevor W. Robbins
- 0000000121885934grid.5335.0Departments of Psychiatry and Psychology, University of Cambridge, Cambridge, UK ,0000000121885934grid.5335.0Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK
| | - Karen D. Ersche
- 0000000121885934grid.5335.0Departments of Psychiatry and Psychology, University of Cambridge, Cambridge, UK ,0000000121885934grid.5335.0Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK
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64
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Everitt BJ, Giuliano C, Belin D. Addictive behaviour in experimental animals: prospects for translation. Philos Trans R Soc Lond B Biol Sci 2019; 373:rstb.2017.0027. [PMID: 29352026 DOI: 10.1098/rstb.2017.0027] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/30/2017] [Indexed: 11/12/2022] Open
Abstract
Since the introduction of intravenous drug self-administration methodology over 50 years ago, experimental investigation of addictive behaviour has delivered an enormous body of data on the neural, psychological and molecular mechanisms of drug reward and reinforcement and the neuroadaptations to chronic use. Whether or not these behavioural and molecular studies are viewed as modelling the underpinnings of addiction in humans, the discussion presented here highlights two areas-the impact of drug-associated conditioned stimuli-or drug cues-on drug seeking and relapse, and compulsive cocaine seeking. The degree to which these findings translate to the clinical state of addiction is considered in terms of the underlying neural circuitry and also the ways in which this understanding has helped develop new treatments for addiction. The psychological and neural mechanisms underlying drug memory reconsolidation and extinction established in animal experiments show particular promise in delivering new treatments for relapse prevention to the clinic.This article is part of a discussion meeting issue 'Of mice and mental health: facilitating dialogue between basic and clinical neuroscientists'.
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Affiliation(s)
- Barry J Everitt
- Behavioural and Clinical Neuroscience Institute, Department of Psychology, University of Cambridge, Downing Street, Cambridge CB2 3EB, UK
| | - Chiara Giuliano
- Behavioural and Clinical Neuroscience Institute, Department of Psychology, University of Cambridge, Downing Street, Cambridge CB2 3EB, UK
| | - David Belin
- Behavioural and Clinical Neuroscience Institute, Department of Psychology, University of Cambridge, Downing Street, Cambridge CB2 3EB, UK
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65
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Shlosberg D, Amit BH, Zalsman G, Krivoy A, Mell H, Lev-Ran S, Shoval G. Cognitive Impairments in Abstinent Male Residents of a Therapeutic Community for Substance-Use Disorders: A Five-Year Retrospective Study. Subst Use Misuse 2019; 54:538-548. [PMID: 30729882 DOI: 10.1080/10826084.2018.1517800] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND AND OBJECTIVES Prior studies of residual cognitive deficits in abstinent substance-use disorder (SUD) patients, exhibited conflicting reports and a substantial patient selection bias. The aim of this study was to test the cognitive function of a sample of chronic abstinent SUD patients in a therapeutic-community. METHODS The IntegNeuroTM cognitive test battery was used for a retrospective cross-sectional study of cognitive functioning of an unselected sample (n = 105) of abstinent male residents of a therapeutic-community. The results were compared to a large age-, gender-, and education-matched normative cohort. RESULTS A significant negative deviance from the normal cohorts' mean was present in most of the cognitive test results and in all the cognitive domains that were tested. The most substantial deficit was found in the executive function domain (d = 1.02, 95%CI (±0.11)). Correct identification of facial emotions was significantly lower selectively in expressions of disgust and sadness. Substance-use starting at an early age (12.4 ± 0.8 years) was associated with lower performance in tests of sustained attention and impulsivity as well as with varied ability to identify correctly "negative" emotions in the emotion identification domain. CONCLUSIONS This 5-year retrospective study demonstrates substantial cognitive impairments in an unselected sample of abstinent SUD patients. Impairment in multiple cognitive domains may lower the probability for remission and successful social integration. Early-age substance initiation may be associated with larger impairments in cognitive performance.
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Affiliation(s)
- Dan Shlosberg
- a Child and Adolescent Division, Geha Mental Health Center , Petah Tikva , Israel.,b Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv , Israel
| | - Ben H Amit
- a Child and Adolescent Division, Geha Mental Health Center , Petah Tikva , Israel.,b Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv , Israel
| | - Gil Zalsman
- a Child and Adolescent Division, Geha Mental Health Center , Petah Tikva , Israel.,b Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv , Israel.,c Division of Molecular Imaging and Neuropathology, Department of Psychiatry , Columbia University , New York , New York , USA
| | - Amir Krivoy
- a Child and Adolescent Division, Geha Mental Health Center , Petah Tikva , Israel.,b Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv , Israel
| | - Haim Mell
- d Therapy and Rehabilitation Unit, Israel Anti-Drug Authority , Jerusalem , Israel
| | - Shaul Lev-Ran
- b Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv , Israel.,e Outpatient Addiction Clinic, Lev Hasharon Medical Center , Israel
| | - Gal Shoval
- a Child and Adolescent Division, Geha Mental Health Center , Petah Tikva , Israel.,b Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv , Israel
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66
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Modelling Differential Vulnerability to Substance Use Disorder in Rodents: Neurobiological Mechanisms. Handb Exp Pharmacol 2019; 258:203-230. [PMID: 31707470 DOI: 10.1007/164_2019_300] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Despite the prevalence of drug use within society, only a subset of individuals actively taking addictive drugs lose control over their intake and develop compulsive drug-seeking and intake that typifies substance use disorder (SUD). Although research in this field continues to be an important and dynamic discipline, the specific neuroadaptations that drive compulsive behaviour in humans addicted to drugs and the neurobiological mechanisms that underlie an individual's innate susceptibility to SUD remain surprisingly poorly understood. Nonetheless, it is clear from research within the clinical domain that some behavioural traits are recurrently co-expressed in individuals with SUD, thereby inviting the hypothesis that certain behavioural endophenotypes may be predictive, or at least act in some way, to modify an individual's probability for developing this disorder. The analysis of such endophenotypes and their catalytic relationship to the expression of addiction-related behaviours has been greatly augmented by experimental approaches in rodents that attempt to capture diagnostically relevant aspects of this progressive brain disorder. This work has evolved from an early focus on aberrant drug reinforcement mechanisms to a now much richer account of the putatively impaired cognitive control processes that ultimately determine individual trajectories to compulsive drug-related behaviours. In this chapter we discuss the utility of experimental approaches in rodents designed to elucidate the neurobiological and genetic underpinnings of so-called risk traits and how these innate vulnerabilities collectively contribute to the pathogenesis of SUD.
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Early life adversity potentiates expression of addiction-related traits. Prog Neuropsychopharmacol Biol Psychiatry 2018; 87:56-67. [PMID: 28899646 DOI: 10.1016/j.pnpbp.2017.09.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 08/21/2017] [Accepted: 09/08/2017] [Indexed: 11/21/2022]
Abstract
Many individuals sporadically and circumstantially sample addictive drugs, yet few become addicted. The individual vulnerabilities underlying the development of addiction are not well understood. Correlational findings show that early life adversity is associated with a greater propensity to develop drug addiction. However, the mechanisms by which early life adversity increases addiction vulnerability are unknown. Separate lines of research have found that several traits are associated with addiction. Here, we examined the effects of early life adversity on addiction-related traits in adulthood. We weaned male and female Sprague-Dawley rats (postnatal day - PND21) and randomly assigned them to either a non-adversity group (N-ADV) or an adversity group (ADV). ADV rats experienced adversity from PND 21-35, they were: a) singly housed, b) food restricted for 12h/day, c) subjected to forced-swim sessions, and d) restrained and exposed to predator odour (1h). As adults, rats were tested for impulsivity, anxiety-like behaviour, novelty preference, and attribution of incentive salience to a reward cue. ADV rats showed enhanced novelty preference and attributed greater incentive value to a reward cue. Compared to N-ADV rats, a greater proportion of ADV rats expressed multiple addiction risk traits. Furthermore, fewer ADV rats expressed no addiction risk traits. This effect was most evident in female ADV rats.
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68
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Parmar A, Kaloiya G. Comorbidity of Personality Disorder among Substance Use Disorder Patients: A Narrative Review. Indian J Psychol Med 2018; 40:517-527. [PMID: 30533947 PMCID: PMC6241194 DOI: 10.4103/ijpsym.ijpsym_164_18] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Comorbidity of personality disorders (PDs) and substance use disorders (SUDs) is common in clinical practice. Borderline PD and antisocial PD are particularly found to be associated with SUDs. Our review suggests that the overall prevalence of PD ranges from 10% to 14.8% in the normal population and from 34.8% to 73.0% in patients treated for addictions. Even though the types of PD seen in patients with drug and alcohol use disorder are similar, the prevalence of any PD is higher among patients with drug use disorder than alcohol use disorder. The higher comorbidity between these two conditions has been explained by a primary personality pathology followed by a secondary development of a SUD. The comorbidity with PD positively correlates with the severity of the SUD. Comorbid PD among patients with SUDs is a predictor of poor prognosis in terms of poorer treatment response and outcome. Psychotherapy is the mainstay of treatment in comorbid condition with dialectical behavioral therapy, dynamic deconstructive psychotherapy, and dual-focused schema therapy having the most evidence base. Pharmacotherapy is primarily indicated for the acute crisis management or for the treatment of other comorbid conditions such as psychosis and depression. However, the evidence is insufficient as of now to suggest one treatment over the other. Further research is required to identify more efficacious treatment approaches for this comorbidity.
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Affiliation(s)
- Arpit Parmar
- Department of Psychiatry and NDDTC, All India Institute of Medical Sciences, New Delhi, India
| | - Gaurishanker Kaloiya
- Department of Psychiatry and NDDTC, All India Institute of Medical Sciences, New Delhi, India
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69
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Luquiens A, Miranda R, Benyamina A, Carré A, Aubin HJ. Cognitive training: A new avenue in gambling disorder management? Neurosci Biobehav Rev 2018; 106:227-233. [PMID: 30359663 DOI: 10.1016/j.neubiorev.2018.10.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 09/10/2018] [Accepted: 10/18/2018] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Cognitive deficits are being robustly documented in gambling disorder. Cognitive training has been increasingly investigated as a treatment of substance use disorders. Four training components have been listed to date: cognitive bias, response inhibition, working memory, and goal-directed. This review aimed at the identification of use and efficacy findings in cognitive training in gambling disorder. METHODS We conducted a systematic search to identify use and efficacy data of cognitive training in gambling disorder. No use or efficacy data was available. DISCUSSION AND PERSPECTIVES Studies assessing cognitive training in gambling disorder are being conducted and first results should be upcoming. Methodological challenges have been identified. Several candidate target cognitive functions of training programs are being investigated, relying on the most documented impairments in gambling disorder, inhibition, reward sensitivity and decision making. Gambling-specific or neutral environments are to be distinguished clearly and do not rely on similar assumptions, i.e. general vulnerability or vulnerability expressed only in the specific context of gambling. Proper control groups with placebo conditions should be implemented. Assessment of efficacy should include clinical and neuropsychological assessments to give information of underlying mechanisms of action.
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Affiliation(s)
- Amandine Luquiens
- Université Paris-Saclay, Université Paris-Sud, UVSQ, CESP, INSERM, Villejuif, France.
| | - Ruben Miranda
- Université Paris-Saclay, Université Paris-Sud, UVSQ, CESP, INSERM, Villejuif, France
| | - Amine Benyamina
- Université Paris-Saclay, Université Paris-Sud, UVSQ, CESP, INSERM, Villejuif, France
| | - Arnaud Carré
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, LIP/PC2S, 38000, Grenoble, France
| | - Henri-Jean Aubin
- Université Paris-Saclay, Université Paris-Sud, UVSQ, CESP, INSERM, Villejuif, France
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70
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Rubio G, Marín M, Arias F, López-Trabada JR, Iribarren M, Alfonso S, Prieto R, Blanco A, Urosa B, Montes V, Jurado R, Jiménez-Arriero MÁ, de Fonseca FR. Inclusion of Alcoholic Associations Into a Public Treatment Programme for Alcoholism Improves Outcomes During the Treatment and Continuing Care Period: A 6-Year Experience. Alcohol Alcohol 2018; 53:78-88. [PMID: 29087443 DOI: 10.1093/alcalc/agx078] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 09/20/2017] [Indexed: 11/14/2022] Open
Abstract
Aims To investigate whether inclusion of self-help groups into the hospital treatment programme improves the prognosis of alcohol dependence through the treatment period; and to examine therapeutic adherence and prognosis during continuing care. Method Patients attending the treatment programme at the 'Hospital 12 de Octubre' were randomized into two groups. In Group A (n = 123), patients received the usual treatment included in our programme, whereas in Group B (n = 126), patients also attended self-help groups. Patients were assessed with psychological scales at baseline, at the end of the treatment period and after completing the continuing care visits. Data were collected over a total of 6 years. Results During the treatment period, patients in Group B accumulated more months of abstinence and dropped out less. During continuing care, patients in Group B accumulated more months of abstinence and therapeutic adherence was higher. Variables that were associated with these results during the continuing care period were: visits to the GP, scores on anxiety, impulsivity and meaning of life scales, and belonging to the group that attended the alcoholic associations. Conclusions Mutual help groups incorporated into a public treatment programme appear to improve outcomes during treatment and on into continuing care. This experience supports cooperation between public health centres and alcoholic associations in treating alcoholism. Short Summary Including alcoholic associations into the public treatment programme for alcoholism of the 'Hospital 12 de Octubre' in Madrid was shown to be associated with better outcomes in terms of months of accumulated abstinence, dropout rates and therapeutic adherence, during the treatment and continuing care periods.
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Affiliation(s)
- Gabriel Rubio
- Centro de Actividades Ambulatorias (CAA) 3ª Planta, Bloque B. Hospital Universitario 12 de Octubre. Avda. de Córdoba S/N, 28042, Madrid, Spain.,Psychiatry Department, Medical School, Complutense University of Madrid, Spain.,Addictive Disorders Network (Carlos III Health Institute, RETICS PROGRAMME), Spain.,Psychiatry Department, University Hospital 12 de Octubre, Spain.,Medical School, Complutense University of Madrid, Spain
| | - Marta Marín
- Centro de Actividades Ambulatorias (CAA) 3ª Planta, Bloque B. Hospital Universitario 12 de Octubre. Avda. de Córdoba S/N, 28042, Madrid, Spain.,Psychiatry Department, University Hospital 12 de Octubre, Spain
| | - Francisco Arias
- Centro de Actividades Ambulatorias (CAA) 3ª Planta, Bloque B. Hospital Universitario 12 de Octubre. Avda. de Córdoba S/N, 28042, Madrid, Spain.,Psychiatry Department, University Hospital 12 de Octubre, Spain
| | - José Ramón López-Trabada
- Centro de Actividades Ambulatorias (CAA) 3ª Planta, Bloque B. Hospital Universitario 12 de Octubre. Avda. de Córdoba S/N, 28042, Madrid, Spain.,Psychiatry Department, University Hospital 12 de Octubre, Spain
| | - Martín Iribarren
- Centro de Actividades Ambulatorias (CAA) 3ª Planta, Bloque B. Hospital Universitario 12 de Octubre. Avda. de Córdoba S/N, 28042, Madrid, Spain.,Psychiatry Department, University Hospital 12 de Octubre, Spain
| | - Susana Alfonso
- Centro de Actividades Ambulatorias (CAA) 3ª Planta, Bloque B. Hospital Universitario 12 de Octubre. Avda. de Córdoba S/N, 28042, Madrid, Spain.,Psychiatry Department, University Hospital 12 de Octubre, Spain
| | - Raquel Prieto
- Centro de Actividades Ambulatorias (CAA) 3ª Planta, Bloque B. Hospital Universitario 12 de Octubre. Avda. de Córdoba S/N, 28042, Madrid, Spain.,Psychiatry Department, University Hospital 12 de Octubre, Spain
| | - Agustín Blanco
- Centro de Actividades Ambulatorias (CAA) 3ª Planta, Bloque B. Hospital Universitario 12 de Octubre. Avda. de Córdoba S/N, 28042, Madrid, Spain.,Psychiatry Department, University Hospital 12 de Octubre, Spain
| | - Belén Urosa
- Psychology School, Methodologic Department, Pontifical University of Comillas, Spain
| | - Victoria Montes
- Psychology School, Methodologic Department, Pontifical University of Comillas, Spain
| | - Rosa Jurado
- Centro de Actividades Ambulatorias (CAA) 3ª Planta, Bloque B. Hospital Universitario 12 de Octubre. Avda. de Córdoba S/N, 28042, Madrid, Spain.,Addictive Disorders Network (Carlos III Health Institute, RETICS PROGRAMME), Spain.,Medical School, Complutense University of Madrid, Spain
| | - Miguel Ángel Jiménez-Arriero
- Centro de Actividades Ambulatorias (CAA) 3ª Planta, Bloque B. Hospital Universitario 12 de Octubre. Avda. de Córdoba S/N, 28042, Madrid, Spain.,Psychiatry Department, Medical School, Complutense University of Madrid, Spain.,Psychiatry Department, University Hospital 12 de Octubre, Spain.,Biomedical Research Centre in the Mental Health Network (CIBERSAM), Spain
| | - Fernando Rodríguez de Fonseca
- Addictive Disorders Network (Carlos III Health Institute, RETICS PROGRAMME), Spain.,Unidad de Gestión Clínica de Salud Mental, Instituto IBIMA, Hospital Regional Universitario de Málaga, Spain
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Dean AC, Morales AM, Hellemann G, London ED. Cognitive deficit in methamphetamine users relative to childhood academic performance: link to cortical thickness. Neuropsychopharmacology 2018; 43:1745-1752. [PMID: 29704001 PMCID: PMC6006320 DOI: 10.1038/s41386-018-0065-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/26/2018] [Accepted: 04/04/2018] [Indexed: 01/09/2023]
Abstract
Individuals with cognitive problems may be predisposed to develop substance use disorders; therefore, differences in cognitive function between methamphetamine users and control participants may be attributable to premorbid factors rather than methamphetamine use. The goal of this study was to clarify the extent to which this is the case. Childhood academic transcripts were obtained for 37 methamphetamine-dependent adults and 41 control participants of similar educational level and premorbid IQ. Each participant completed a comprehensive cognitive battery and received a structural magnetic resonance imaging scan. Data from control participants and linear regression were used to develop a normative model to describe the relationship between childhood academic performance and scores on the cognitive battery. Using this model, cognitive performance of methamphetamine users was predicted from their premorbid academic scores. Results indicated that methamphetamine users' childhood grade point average was significantly lower than that of the control group (p < 0.05). Further, methamphetamine users' overall cognitive performance was lower than was predicted from their grade point average prior to methamphetamine use (p = 0.001), with specific deficits in attention/concentration and memory (ps < 0.01). Memory deficits were associated with lower whole-brain cortical thickness (p < 0.05). Thus, in addition to having an apparent premorbid weakness in cognition, methamphetamine users exhibit subsequent cognitive function that is significantly lower than premorbid estimates would predict. The results support the view that chronic methamphetamine use causes a decline in cognition and/or a failure to develop normative cognitive abilities, although aside from methamphetamine use per se, other drug use and unidentified factors likely contribute to the observed effects.
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Affiliation(s)
- Andy C. Dean
- 0000 0000 9632 6718grid.19006.3eDepartment of Psychiatry and Biobehavioral Sciences, UCLA Semel Institute for Neuroscience, David Geffen School of Medicine, Los Angeles, CA 90024 USA ,0000 0000 9632 6718grid.19006.3eBrain Research Institute, David Geffen School of Medicine, Los Angeles, CA 90024 USA
| | - Angelica M. Morales
- 0000 0000 9632 6718grid.19006.3eDepartment of Psychiatry and Biobehavioral Sciences, UCLA Semel Institute for Neuroscience, David Geffen School of Medicine, Los Angeles, CA 90024 USA
| | - Gerhard Hellemann
- 0000 0000 9632 6718grid.19006.3eDepartment of Psychiatry and Biobehavioral Sciences, UCLA Semel Institute for Neuroscience, David Geffen School of Medicine, Los Angeles, CA 90024 USA
| | - Edythe D. London
- 0000 0000 9632 6718grid.19006.3eDepartment of Psychiatry and Biobehavioral Sciences, UCLA Semel Institute for Neuroscience, David Geffen School of Medicine, Los Angeles, CA 90024 USA ,0000 0000 9632 6718grid.19006.3eBrain Research Institute, David Geffen School of Medicine, Los Angeles, CA 90024 USA ,0000 0000 9632 6718grid.19006.3eDepartment of Molecular and Medical Pharmacology, David Geffen School of Medicine, Los Angeles, CA 90024 USA
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Abstract
The significant progress of psychiatry in the 20th century provided a sophisticated theoretical framework to analyze the complex relationships between crime and mental illness. Schizophrenia has been traditionally associated with severe cognitive and affective deficits that heavily influence empathy, judgment capacities, but also control of impulsiveness. Although there is an association between psychotic disorders and absence or decrease of legal responsibility, their relationship is also determined by sociodemographic, developmental, and clinical factors. These disorders are associated not only with abolished criminal responsibility but also with diminished responsibility. We conduct a systematic literature review to examine the relation between schizophrenia and criminal responsibility. We have found that this clinical entity is often associated with diminished or abolished criminal liability. We discuss these findings, focusing on the specific deficits found in patients with schizophrenia and examining how this problem affects their behavior and eventually their accountability for their crimes.
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Egervari G, Ciccocioppo R, Jentsch JD, Hurd YL. Shaping vulnerability to addiction - the contribution of behavior, neural circuits and molecular mechanisms. Neurosci Biobehav Rev 2018; 85:117-125. [PMID: 28571877 PMCID: PMC5708151 DOI: 10.1016/j.neubiorev.2017.05.019] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Revised: 05/11/2017] [Accepted: 05/22/2017] [Indexed: 12/11/2022]
Abstract
Substance use disorders continue to impose increasing medical, financial and emotional burdens on society in the form of morbidity and overdose, family disintegration, loss of employment and crime, while advances in prevention and treatment options remain limited. Importantly, not all individuals exposed to abused substances effectively develop the disease. Genetic factors play a significant role in determining addiction vulnerability and interactions between innate predisposition, environmental factors and personal experiences are also critical. Thus, understanding individual differences that contribute to the initiation of substance use as well as on long-term maladaptations driving compulsive drug use and relapse propensity is of critical importance to reduce this devastating disorder. In this paper, we discuss current topics in the field of addiction regarding individual vulnerability related to behavioral endophenotypes, neural circuits, as well as genetics and epigenetic mechanisms. Expanded knowledge of these factors is of importance to improve and personalize prevention and treatment interventions in the future.
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Affiliation(s)
- Gabor Egervari
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, 10029 New York, NY, USA; Department of Neuroscience, Icahn School of Medicine at Mount Sinai, 10029 New York, NY, USA
| | - Roberto Ciccocioppo
- School of Pharmacy, Pharmacology Unit, University of Camerino, 62032 Camerino, Italy
| | - J David Jentsch
- Department of Psychology, Binghamton University, 13902 Binghamton, NY, USA
| | - Yasmin L Hurd
- Department of Psychiatry, Icahn School of Medicine at Mount Sinai, 10029 New York, NY, USA; Department of Neuroscience, Icahn School of Medicine at Mount Sinai, 10029 New York, NY, USA.
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Anderson EM, Larson EB, Guzman D, Wissman AM, Neve RL, Nestler EJ, Self DW. Overexpression of the Histone Dimethyltransferase G9a in Nucleus Accumbens Shell Increases Cocaine Self-Administration, Stress-Induced Reinstatement, and Anxiety. J Neurosci 2018; 38:803-813. [PMID: 29217682 PMCID: PMC5783964 DOI: 10.1523/jneurosci.1657-17.2017] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 11/03/2017] [Accepted: 11/27/2017] [Indexed: 12/27/2022] Open
Abstract
Repeated exposure to cocaine induces lasting epigenetic changes in neurons that promote the development and persistence of addiction. One epigenetic alteration involves reductions in levels of the histone dimethyltransferase G9a in nucleus accumbens (NAc) after chronic cocaine administration. This reduction in G9a may enhance cocaine reward because overexpressing G9a in the NAc decreases cocaine-conditioned place preference. Therefore, we hypothesized that HSV-mediated G9a overexpression in the NAc shell (NAcSh) would attenuate cocaine self-administration (SA) and cocaine-seeking behavior. Instead, we found that G9a overexpression, and the resulting increase in histone 3 lysine 9 dimethylation (H3K9me2), increases sensitivity to cocaine reinforcement and enhances motivation for cocaine in self-administering male rats. Moreover, when G9a overexpression is limited to the initial 15 d of cocaine SA training, it produces an enduring postexpression enhancement in cocaine SA and prolonged (over 5 weeks) increases in reinstatement of cocaine seeking induced by foot-shock stress, but in the absence of continued global elevations in H3K9me2. The increase in stress-induced reinstatement is paralleled by heightened anxiety measures, suggesting that countering the cocaine-induced decreases in endogenous G9a with ectopic G9a overexpression leads to lasting anxiogenic effects. Finally, we found an enduring reduction in phosphorylated cAMP-response element binding protein levels in the NAcSh that could account for the increased anxiety. These data demonstrate a novel role for G9a in promoting comorbid cocaine addiction and anxiety and suggest that increased epigenetic repression of transcription through H3K9 during cocaine use can have long-lasting and unexpected negative consequences on behavior.SIGNIFICANCE STATEMENT Cocaine addiction is a neuropsychiatric disorder that is detrimental to society and currently has no effective treatments. The difficulty in treating drug addiction is compounded by the high comorbidity with other psychiatric illnesses, including anxiety disorders. Here, we demonstrate that G9a, an epigenetic repressor of gene expression, acting in the nucleus accumbens, a brain reward region, is capable of increasing both addiction- and anxiety-like behaviors in rats. These findings are intriguing because repeated cocaine exposure decreases G9a in this region and thereby enhances expression of certain addiction-promoting genes. However, our results suggest that countering this cocaine-induced decrease in G9a activity actually exacerbates addiction and sensitivity to relapse under stressful situations.
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Affiliation(s)
- Ethan M Anderson
- Department of Psychiatry, The Seay Center for Basic and Applied Research in Psychiatric Illness, University of Texas Southwestern Medical Center, Dallas, Texas, 75390
| | - Erin B Larson
- Department of Psychiatry, The Seay Center for Basic and Applied Research in Psychiatric Illness, University of Texas Southwestern Medical Center, Dallas, Texas, 75390
| | - Daniel Guzman
- Department of Psychiatry, The Seay Center for Basic and Applied Research in Psychiatric Illness, University of Texas Southwestern Medical Center, Dallas, Texas, 75390
| | - Anne Marie Wissman
- Department of Psychiatry, The Seay Center for Basic and Applied Research in Psychiatric Illness, University of Texas Southwestern Medical Center, Dallas, Texas, 75390
| | - Rachael L Neve
- Viral Gene Transfer Core, Department of Brain and Cognitive Sciences, McGovern Institute for Brain Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, and
| | - Eric J Nestler
- Icahn School of Medicine at Mount Sinai, Department of Neuroscience, New York, New York 10029
| | - David W Self
- Department of Psychiatry, The Seay Center for Basic and Applied Research in Psychiatric Illness, University of Texas Southwestern Medical Center, Dallas, Texas, 75390,
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Gerra MC, Jayanthi S, Manfredini M, Walther D, Schroeder J, Phillips KA, Cadet JL, Donnini C. Gene variants and educational attainment in cannabis use: mediating role of DNA methylation. Transl Psychiatry 2018; 8:23. [PMID: 29353877 PMCID: PMC5802451 DOI: 10.1038/s41398-017-0087-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 07/25/2017] [Accepted: 11/21/2017] [Indexed: 02/08/2023] Open
Abstract
Genetic and sociodemographic risk factors potentially associated with cannabis use (CU) were investigated in 40 cannabis users and 96 control subjects. DNA methylation analyses were also performed to explore the possibility of epigenetic changes related to CU. We conducted a candidate gene association study that included variants involved in the dopaminergic (ANKK1, NCAM1 genes) and endocannabinoid (CNR1, CNR2 gene) pathways. Sociodemographic data included gender, marital status, level of education, and body mass index. We used MeDIP-qPCR to test whether variations in DNA methylation might be associated with CU. We found a significant association between SNP rs1049353 of CNR1 gene (p = 0.01) and CU. Differences were also observed related to rs2501431 of CNR2 gene (p = 0.058). A higher education level appears to decrease the risk of CU. Interestingly, females were less likely to use cannabis than males. There was a significantly higher level of DNA methylation in cannabis users compared to controls in two of the genes tested: hypermethylation at exon 8 of DRD2 gene (p = 0.034) and at the CpG-rich region in the NCAM1 gene (p = 0.0004). Both genetic variants and educational attainment were also related to CU. The higher rate of DNA methylation, evidenced among cannabis users, may be either a marker of CU or a consequence of long-term exposure to cannabis. The identified genetic variants and the differentially methylated regions may represent biomarkers and/or potential targets for designs of pharmacological therapeutic agents. Our observations also suggest that educational programs may be useful strategies for CU prevention.
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Affiliation(s)
- Maria Carla Gerra
- 0000 0004 1758 0937grid.10383.39Department of Chemistry, Life Science and Environmental Sustainability, University of Parma, Parma, Italy
| | - Subramaniam Jayanthi
- 0000 0004 0533 7147grid.420090.fMolecular Neuropsychiatry Research Branch, NIDA Intramural Research Program, Baltimore, MD USA
| | - Matteo Manfredini
- 0000 0004 1758 0937grid.10383.39Department of Chemistry, Life Science and Environmental Sustainability, University of Parma, Parma, Italy
| | - Donna Walther
- 0000 0004 0533 7147grid.420090.fMolecular Neuropsychiatry Research Branch, NIDA Intramural Research Program, Baltimore, MD USA
| | - Jennifer Schroeder
- 0000 0004 0533 7147grid.420090.fOffice of the Clinical Director, NIDA Intramural Research Program, Baltimore, MD USA
| | - Karran A. Phillips
- 0000 0004 0533 7147grid.420090.fOffice of the Clinical Director, NIDA Intramural Research Program, Baltimore, MD USA
| | - Jean Lud Cadet
- Molecular Neuropsychiatry Research Branch, NIDA Intramural Research Program, Baltimore, MD, USA.
| | - Claudia Donnini
- 0000 0004 1758 0937grid.10383.39Department of Chemistry, Life Science and Environmental Sustainability, University of Parma, Parma, Italy
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Swanepoel A, Music G, Launer J, Reiss MJ. How evolutionary thinking can help us to understand ADHD. BJPSYCH ADVANCES 2018. [DOI: 10.1192/apt.bp.116.016659] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
SummaryWe argue that current debates about attention-deficit hyperactivity disorder (ADHD) can be considered afresh using an evolutionary lens. We show how the symptoms of ADHD can often be considered adaptive to their specific environment. We suggest that, from an evolutionary point of view, ADHD symptoms might be understood to result from an ‘evolutionary mismatch’, in which current environmental demands do not fit with what evolution has prepared us to cope with. For example, in our ancestral environment of evolutionary adaptedness (EEA), children were not expected to sit still and concentrate on academic tasks for many hours a day. Understanding ADHD in terms of such a ‘mismatch’ raises significant issues regarding the management of childhood ADHD, including ethical ones. An approach based on the concept of mismatch could provide an alternative to current debates on whether ADHD results from nature or nurture and whether it is under- or over-diagnosed. It would allow clinicians and policy makers to take both the child and the environment into account and consider what might be desirable and feasible, both in society and for specific children, to lessen the mismatch.LEARNING OBJECTIVES•Grasp the concept of ADHD as an ‘evolutionary mismatch’•Understand the issues raised by this perspective, including ethical ones•Appreciate how a transparent discussion of these issues might inform decisions about management, medication and schooling
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Unterrainer HF, Hiebler M, Ragger K, Froehlich L, Koschutnig K, Schoeggl H, Kapfhammer HP, Papousek I, Weiss EM, Fink A. White matter integrity in polydrug users in relation to attachment and personality: a controlled diffusion tensor imaging study. Brain Imaging Behav 2017; 10:1096-1107. [PMID: 26542619 DOI: 10.1007/s11682-015-9475-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The relationship between substance use disorders (SUD) and brain deficits has been studied extensively. However, there is still a lack of research focusing on the structural neural connectivity in long-term polydrug use disorder (PUD). Since a deficiency in white matter integrity has been reported as being related to various parameters of increased psychopathology, it might be considered an aggravating factor in the treatment of SUD. In this study we compared two groups of PUD inpatients (abstinent: n = 18, in maintenance treatment: n = 15) to healthy controls (n = 16) with respect to neural connectivity in white matter, and their relation to behavioral parameters of personality factors/organization and attachment styles. Diffusion Tensor Imaging was used to investigate white matter structure. Compared with healthy controls, the PUD patients showed reduced fractional anisotropy (FA) and increased radial diffusivity (RD) mainly in the superior fasciculus longitudinalis and the superior corona radiata. These findings suggest diminished neural connectivity as a result of myelin pathology in PUD patients. In line with our assumptions, we observed FA in the biggest cluster as negatively correlated with anxious attachment (r = 0.36, p < 0.05), personality dysfunctioning (r = -0.41; p < 0.01) as well positively correlated with personality factors Openness (r = 0.34; p < 0.05) and Agreeableness (r = 0.28; p < 0.05). Correspondingly these findings were inversely mirrored by RD. Further research employing enhanced samples and addressing longitudinally neuronal plastic effects of SUD treatment in relation to changes in personality and attachment is recommended.
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Affiliation(s)
- H F Unterrainer
- University of Graz, Institute of Psychology, BioTechMed-Graz, Graz, Austria. .,Center for Integrative Addiction Research (Grüner Kreis Society), Vienna, Austria. .,University Clinic of Psychiatry, Medical University, Graz, Austria. .,Karl-Franzens-University Graz, Universitätsplatz 2, 8010, Graz, Austria.
| | - M Hiebler
- University of Graz, Institute of Psychology, BioTechMed-Graz, Graz, Austria
| | - K Ragger
- University of Graz, Institute of Psychology, BioTechMed-Graz, Graz, Austria
| | - L Froehlich
- University of Graz, Institute of Psychology, BioTechMed-Graz, Graz, Austria
| | - K Koschutnig
- University of Graz, Institute of Psychology, BioTechMed-Graz, Graz, Austria
| | - H Schoeggl
- University Clinic of Psychiatry, Medical University, Graz, Austria
| | - H P Kapfhammer
- University Clinic of Psychiatry, Medical University, Graz, Austria
| | - I Papousek
- University of Graz, Institute of Psychology, BioTechMed-Graz, Graz, Austria
| | - E M Weiss
- University of Graz, Institute of Psychology, BioTechMed-Graz, Graz, Austria
| | - A Fink
- University of Graz, Institute of Psychology, BioTechMed-Graz, Graz, Austria
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Grodin EN, Cortes CR, Spagnolo PA, Momenan R. Structural deficits in salience network regions are associated with increased impulsivity and compulsivity in alcohol dependence. Drug Alcohol Depend 2017; 179:100-108. [PMID: 28763777 PMCID: PMC11034794 DOI: 10.1016/j.drugalcdep.2017.06.014] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 06/01/2017] [Accepted: 06/24/2017] [Indexed: 12/18/2022]
Abstract
BACKGROUND Convergent preclinical and clinical evidence has linked the anterior insula to impulsivity and alcohol-associated compulsivity. The anterior insula is functionally connected to the anterior cingulate cortex, together comprising the major nodes of the salience network, which serves to signal salient events, including negative consequences. Clinical studies have found structural and functional alterations in the anterior insula and anterior cingulate cortices of alcohol dependent individuals. No studies have yet investigated the association between morphometric abnormalities in salience network regions and the phenotype of high levels of impulsivity and compulsivity seen in alcohol dependent individuals. METHODS In the current study, we compared self-report impulsivity, decisional impulsivity, self-report compulsivity, and structural neuroimaging measures in a sample of alcohol dependent individuals (n=60) and a comparison group of healthy controls (n=49). From the structural magnetic resonance images, we calculated volume and cortical thickness for 6 regions of interest: left and right anterior insula, posterior insula, and anterior cingulate. RESULTS We found that alcohol dependent individuals had smaller anterior insula and anterior cingulate volumes, as well as thinner anterior insula cortices. There were no group differences in posterior insula morphometry. Anterior insula and anterior cingulate structural measures were negatively associated with self-report impulsivity, decisional impulsivity, and compulsivity measures. CONCLUSIONS Our results suggest that addiction endophenotypes are associated with salience network morphometry in alcohol addiction. These relationships indicate that salience network hubs represent potential treatment targets for impulse control disorders, including alcohol addiction.
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Affiliation(s)
- Erica N Grodin
- Clinical Neuroimaging Research Core, NIAAA, NIH, Bethesda, MD 20892, United States; Department of Neuroscience, Brown University, Providence, RI, 02912, United States
| | - Carlos R Cortes
- Clinical Neuroimaging Research Core, NIAAA, NIH, Bethesda, MD 20892, United States
| | | | - Reza Momenan
- Clinical Neuroimaging Research Core, NIAAA, NIH, Bethesda, MD 20892, United States.
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79
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Bickel WK, Moody LN, Eddy CR, Franck CT. Neurocognitive dysfunction in addiction: Testing hypotheses of diffuse versus selective phenotypic dysfunction with a classification-based approach. Exp Clin Psychopharmacol 2017; 25:322-332. [PMID: 28782983 PMCID: PMC5606154 DOI: 10.1037/pha0000115] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Neurocognitive dysfunctions are frequently identified in the addictions. These dysfunctions may indicate either diffuse dysfunction or may represent separate facets that have differential importance to the addiction phenotype. In a sample (n = 260) of alcohol and/or stimulant users and controls we measured responses across 7 diverse neurocognitive measures. These measures were Continuous Performance, Delay Discounting, Iowa Gambling, Stroop, Tower, Wisconsin Card Sorting, and Letter Number Sequencing. Comparisons were then made between the drug-dependent groups and controls using analysis of variance and also using a machine learning approach to classify participants based on task performance as substance-dependent or controls in 1 tree and as alcohol and/or stimulant users or controls in a second tree. The analysis of variance showed significant differences between groups on the Delay Discounting (p < .001), Iowa Gambling (p < .001), Letter Number Sequencing (p < .001), and Wisconsin Card Sorting (p < .05) tasks. The first classification tree correctly classified between substance-dependent or controls for 88.3% of participants and classified between alcohol and/or stimulant users or controls for 63.9% of participants. Delay discounting was the first split in both trees and in the substance-dependent and control tree. The analysis of variance results largely replicate previous findings. The machine learning classification tree analysis provides evidence to support the hypothesis that different measures of neurocognitive dysfunction represent different processes. Among them, delay discounting was the most robust in categorizing drug dependence. (PsycINFO Database Record
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Affiliation(s)
- Warren K. Bickel
- Virginia Tech Carilion Research Institute, Roanoke, VA, USA,Virginia Tech, Department of Psychology, Blacksburg, VA, USA
| | - Lara N. Moody
- Virginia Tech Carilion Research Institute, Roanoke, VA, USA,Virginia Tech, Department of Psychology, Blacksburg, VA, USA
| | - Celia R. Eddy
- Virginia Tech, Department of Statistics, Blacksburg, VA, USA
| | - Christopher T. Franck
- Virginia Tech Carilion Research Institute, Roanoke, VA, USA,Virginia Tech, Department of Statistics, Blacksburg, VA, USA
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Istin M, Thiriet N, Solinas M. Behavioral flexibility predicts increased ability to resist excessive methamphetamine self-administration. Addict Biol 2017; 22:958-966. [PMID: 26969296 DOI: 10.1111/adb.12384] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 12/02/2015] [Accepted: 02/05/2016] [Indexed: 11/30/2022]
Abstract
Drug addiction is often associated with cognitive deficits and behavioral inflexibility that may contribute to the development and maintenance of addictive behaviors by reducing addicts' ability to control their behavior toward the drug. In this study, we investigated the relationships between pre-drug levels of behavioral flexibility and the risk to develop uncontrolled methamphetamine (METH) self-administration. First, we measured individual performance in an inter-dimensional set-shifting procedure in which animals have to switch between an external visual rule and an internal side rule in order to obtain food pellets. Then we allowed rats to self-administer METH for twenty long 14-hour sessions, and we investigated the relationships between behavioral flexibility and measures of control over drug intake. Rats rapidly acquired to self-administer high levels of METH which resulted in moderate weight loss. After several sessions of self-administration, whereas some rats progressively increased their METH intake, other rats showed very long voluntary pauses between drug injections and showed no escalation in METH self-administration. Interestingly, we found that behavioral flexibility is correlated with METH self-administration and that more flexible rats take less METH and do not escalate drug taking. These results suggest that traits of behavioral flexibility may protect against the development of excessive and dysregulated drug taking. Conversely, the inability to adapt behavioral responses as a function of the environmental contingencies may contribute to the risks to develop addiction to METH.
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Affiliation(s)
| | - Nathalie Thiriet
- University of Poitiers; France
- INSERM, U-1084; Experimental and Clinical Neurosciences Laboratory; France
| | - Marcello Solinas
- University of Poitiers; France
- INSERM, U-1084; Experimental and Clinical Neurosciences Laboratory; France
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81
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Liang CS, Ho PS, Yen CH, Chen CY, Kuo SC, Huang CC, Yeh YW, Ma KH, Huang SY. The relationship between the striatal dopamine transporter and novelty seeking and cognitive flexibility in opioid dependence. Prog Neuropsychopharmacol Biol Psychiatry 2017; 74:36-42. [PMID: 27940252 DOI: 10.1016/j.pnpbp.2016.12.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Revised: 11/18/2016] [Accepted: 12/05/2016] [Indexed: 12/31/2022]
Abstract
Novelty seeking (NS) is a core personality trait that primes the susceptibility to drug addiction. Striatal dopamine activity contributes to cognitive flexibility, an important cognitive strategy to inhibit impulsivity and compulsive drug-seeking behavior. Evidence supports the association between dopamine and NS. Opioid-dependent patients show higher levels of NS, and repeated opioid exposure can cause cognitive deficits including poor cognitive flexibility and impaired impulse control. However, in opioid-dependent patients, the link between NS, striatal dopamine activity, and cognitive flexibility is still unclear. We recruited 22 opioid-dependent individuals and 30 age- and sex-matched healthy controls. Single-photon emission computed tomography with [99mTc]TRODAT-1 as a ligand was used to measure the striatal dopamine transporter (DAT) availability. The Trail Making Test (TMT) was performed to assess cognitive flexibility. Cloninger's Tridimensional Personality Questionnaire (TPQ) was used to measure NS. We found that in opioid-dependent patients, the striatal DAT availability was lower and negatively associated with TMT Part B÷Part A. Moreover, an inverted-U shape significantly matched the scores of NS as a function of the striatal DAT availability, with maximum NS potential in the midrange of the DAT availability. An extra sum-of-squares F test was conducted, indicating that a quadratic model fitted the association between the DAT and NS better than a linear model did. In brief, in opioid-dependent patients, the striatal DAT availability is nonlinearly linked to NS and linearly linked to cognitive flexibility. The role of the striatal DAT in the transition from controlled to compulsive opioid use warrants further research.
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Affiliation(s)
- Chih-Sung Liang
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan, ROC; Department of Psychiatry, Beitou Branch, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC
| | - Pei-Shen Ho
- Department of Psychiatry, Beitou Branch, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC
| | - Che-Hung Yen
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan, ROC; Department of Neurology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC
| | - Chun-Yen Chen
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan, ROC; Department of Psychiatry, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC
| | - Shin-Chang Kuo
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan, ROC; Department of Psychiatry, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC
| | - Chang-Chih Huang
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan, ROC; Department of Psychiatry, Taipei Branch, Buddhist Tzu Chi General Hospital, Taipei, Taiwan, ROC
| | - Yi-Wei Yeh
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan, ROC; Department of Psychiatry, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC
| | - Kuo-Hsing Ma
- Department of anatomy and biology, National Defense Medical Center, Taipei, Taiwan, ROC
| | - San-Yuan Huang
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan, ROC; Department of Psychiatry, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC.
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Robbins TW, Dalley JW. Dissecting Impulsivity: Brain Mechanisms and Neuropsychiatric Implications. NEBRASKA SYMPOSIUM ON MOTIVATION 2017. [DOI: 10.1007/978-3-319-51721-6_7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Arenas MC, Aguilar MA, Montagud-Romero S, Mateos-García A, Navarro-Francés CI, Miñarro J, Rodríguez-Arias M. Influence of the Novelty-Seeking Endophenotype on the Rewarding Effects of Psychostimulant Drugs in Animal Models. Curr Neuropharmacol 2016; 14:87-100. [PMID: 26391743 PMCID: PMC4787288 DOI: 10.2174/1570159x13666150921112841] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 08/20/2015] [Accepted: 09/19/2015] [Indexed: 12/16/2022] Open
Abstract
Novelty seeking (NS), defined as a tendency to pursue novel and intense emotional sensations and experiences, is one of the most relevant individual factors predicting drug use among humans. High novelty seeking (HNS) individuals present an increased risk of drug use compared to low novelty seekers. The NS endophenotype may explain some of the differences observed among individuals exposed to drugs of abuse in adolescence. However, there is little research about the particular response of adolescents to drugs of abuse in function of this endophenotype, and the data that do exist are inconclusive. The present work reviews the literature regarding the influence of NS on psychostimulant reward, with particular focus on adolescent subjects. First, the different animal models of NS and the importance of this endophenotype in adolescence are discussed. Later, studies that have used the most common animal models of reward (self-administration, conditioned place preference paradigms) to evaluate how the NS trait influences the rewarding effects of psychostimulants are reviewed. Finally, possible explanations for the enhanced risk of developing substance dependence among HNS individuals are discussed. In conclusion, the studies referred to in this review show that the HNS trait is associated with: (1) increased initial sensitivity to the rewarding effects of psychostimulants, (2) a higher level of drug craving when the subject is exposed to the environmental cues associated with the drug, and (3) enhanced long-term vulnerability to relapse to drug consumption after prolonged abstinence.
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Affiliation(s)
| | | | | | | | | | | | - Marta Rodríguez-Arias
- Unidad de Investigación Psicobiología de las Drogodependencias, Departamento de Psicobiología, Facultad de Psicología, Universitat de València, Avda. Blasco Ibañez, 21, 46010, Valencia, Spain.
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Abstract
A decade ago, we hypothesized that drug addiction can be viewed as a transition from voluntary, recreational drug use to compulsive drug-seeking habits, neurally underpinned by a transition from prefrontal cortical to striatal control over drug seeking and taking as well as a progression from the ventral to the dorsal striatum. Here, in the light of burgeoning, supportive evidence, we reconsider and elaborate this hypothesis, in particular the refinements in our understanding of ventral and dorsal striatal mechanisms underlying goal-directed and habitual drug seeking, the influence of drug-associated Pavlovian-conditioned stimuli on drug seeking and relapse, and evidence for impairments in top-down prefrontal cortical inhibitory control over this behavior. We further review animal and human studies that have begun to define etiological factors and individual differences in the propensity to become addicted to drugs, leading to the description of addiction endophenotypes, especially for cocaine addiction. We consider the prospect of novel treatments for addiction that promote abstinence from and relapse to drug use.
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Affiliation(s)
- Barry J Everitt
- Department of Psychology and Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge CB2 3EB, United Kingdom; ,
| | - Trevor W Robbins
- Department of Psychology and Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge CB2 3EB, United Kingdom; ,
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Personality profile of binge drinking in university students is modulated by sex. A study using the Alternative Five Factor Model. Drug Alcohol Depend 2016; 165:120-5. [PMID: 27262897 DOI: 10.1016/j.drugalcdep.2016.05.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 05/24/2016] [Accepted: 05/24/2016] [Indexed: 12/29/2022]
Abstract
BACKGROUND The prevalence of binge drinking (BD), found especially among young people, is increasing worldwide and has become an important social and health concern. We studied, for the first time, the personality profile, using the Alternative Five Factor Model, among university students with BD and healthy controls, taking into account the possible influence of sex. METHODS 70 participants with BD (30 men) and 70 healthy controls (30 men) were included, selected to control for characteristics that are known to be related to BD (physical and mental disorders, consumption of other drugs, circadian rhythms), completed the Zuckerman-Kuhlman Personality Questionnaire (ZKPQ). RESULTS The scores on Neuroticism-Anxiety and Impulsive Sensation-Seeking were higher in the BD group compared to the controls (p<0.001 in both cases). The higher scores in the BD group in Neuroticism-Anxiety are due to higher scores in the women's group (p=0.014), while those in Impulsive Sensation-Seeking are due to higher scores in the men's group (p=0.009), both in the Impulsivity and in the Sensation-Seeking subscales (p<0.045). CONCLUSIONS Sex could be a factor that modulates the endophenotype of drug dependence (impulsive and anxious personality) and the prevention and/or treatment programs for BD should include not only the management of the personality risk factors but also different tailored approaches according to sex.
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Altered economic decision-making in abstinent heroin addicts: Evidence from the ultimatum game. Neurosci Lett 2016; 627:148-54. [PMID: 27264486 DOI: 10.1016/j.neulet.2016.06.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 05/18/2016] [Accepted: 06/01/2016] [Indexed: 12/20/2022]
Abstract
BACKGROUND The development and persistence of drug addiction has been suggested to involve decision-making deficits. The Ultimatum Game is a widely used economic decision-making paradigm that illustrates the tension between financial self-interest and fairness motives. The behavior of responders in the Ultimatum Game has been associated with emotional reactions and cognitive control abilities, both of which are dysregulated in drug addicts. In this study, we investigated whether this economic decision-making process that involves considerations of social norms is affected by heroin addiction. METHODS Heroin addicts (n=17) and demographically matched healthy control subjects (n=18) were recruited to play the part of responders in the Ultimatum Game, during which they decided to accept or reject the monetary offers proposed by strangers. The offers were manipulated by varying the stake sizes and fairness scales. The rejection rates of all of the offer categories, response times, fairness judgments, and impulsivity were compared between heroin addicts and healthy controls. RESULTS Compared with healthy subjects, the rejection rates of most unfair offers in the Ultimatum Game were significantly higher under low-offer-size conditions among heroin addicts. In contrast, the most unfair offers were more likely to be accepted by heroin addicts in the high-offer-size condition than by healthy subjects. The ratings of unfairness were equal in both conditions although the rejection rates were different. Heroin addicts had higher scores on BIS attentional/cognitive impulsivity and non-planning impulsivity, but not in motor impulsivity. Rejection rates to most unfair offers under low-offer-size conditions significantly correlated with score on BIS non-planning impulsivity and total score of impulsivity. CONCLUSIONS Heroin addicts differentially responded under different stake-level conditions in the Ultimatum Game, with emotional impulses in low-offer-size conditions and selfish motives in the face of high monetary reward. These findings indicate that Ultimatum Game may be associated with heroin addiction and provide a productive new target for enhancing treatment for heroin addiction.
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88
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‘Jumping to conclusions’ data-gathering bias in psychosis and other psychiatric disorders — Two meta-analyses of comparisons between patients and healthy individuals. Clin Psychol Rev 2016; 46:151-67. [DOI: 10.1016/j.cpr.2016.05.001] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 03/30/2016] [Accepted: 05/11/2016] [Indexed: 11/21/2022]
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Cortes JA, Gomez G, Ehnerd C, Gurnsey K, Nicolazzo J, Bradberry CW, Jedema HP. Altered activity-based sleep measures in rhesus monkeys following cocaine self-administration and abstinence. Drug Alcohol Depend 2016; 163:202-8. [PMID: 27114202 PMCID: PMC4891812 DOI: 10.1016/j.drugalcdep.2016.04.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 04/13/2016] [Accepted: 04/14/2016] [Indexed: 11/18/2022]
Abstract
BACKGROUND Impairments in sleep and cognitive function have been observed in patients with substance abuse disorders and may be potential factors contributing to drug relapse. In addition, sleep disruption may itself contribute to cognitive deficits. In the present study we examined the impact of prolonged cocaine self-administration and abstinence on actigraphy-based measures of night-time activity in rhesus macaques as an inferential measure of sleep, and determined whether sleep-efficiency correlated with cognitive impairments in the same subjects on drug free days. METHODS Actigraphy data was obtained from a group of rhesus macaques intravenously self-administering cocaine (n=6) and a control group (n=5). Periods were evaluated during which the mean cumulative doses of cocaine were 3.0+0.0 and 4.5+0.2mg/kg/day for 4days (Tuesday-Thursday) each week. RESULTS Actigraphy-based sleep efficiency decreased during days of cocaine self-administration in a dose-dependent manner. Consistent with this observation, sleep became more fragmented. Activity-based sleep efficiency normalized during the weekend without cocaine prior to cognitive assessment on Monday. The magnitude of activity-based sleep disruption during self-administration did not correlate with the level of cognitive impairment on drug free days. With continued self-administration, the impact of cocaine on activity-based sleep efficiency declined indicating the development of tolerance. CONCLUSIONS Cocaine self-administration disrupted sleep efficiency in rhesus macaques as measured by actigraphy, but normalized quickly in the absence of cocaine. The cognitive impairment observed on drug free days was unlikely to be related to disruption of the nightly activity patterns on days of cocaine self-administration.
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Affiliation(s)
- Jennifer A Cortes
- Departments of Bioengineering, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA 15261, USA
| | - Gustavo Gomez
- Departments of Neuroscience, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA 15261, USA
| | - Carol Ehnerd
- Departments of Psychiatry, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA 15261, USA
| | - Kate Gurnsey
- Departments of Psychiatry, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA 15261, USA
| | - Jessica Nicolazzo
- Departments of Psychiatry, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA 15261, USA
| | - Charles W Bradberry
- Departments of Neuroscience, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA 15261, USA; Departments of Psychiatry, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA 15261, USA; VA Pittsburgh Healthcare System, University Drive, Pittsburgh, PA 15240, USA
| | - Hank P Jedema
- Departments of Psychiatry, University of Pittsburgh, 3501 Fifth Avenue, Pittsburgh, PA 15261, USA.
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90
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Ali A, Carré A, Hassler C, Spilka S, Vanier A, Barry C, Berthoz S. Risk factors for substances use and misuse among young people in France: What can we learn from the Substance Use Risk Profile Scale? Drug Alcohol Depend 2016; 163:84-91. [PMID: 27155755 DOI: 10.1016/j.drugalcdep.2016.03.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 03/08/2016] [Accepted: 03/29/2016] [Indexed: 10/21/2022]
Abstract
BACKGROUND The prevention of addictions in young people is a challenge for Mental and Public Health policies, and requires specific risk-screening tools. Specific personality traits, as assessed using the Substance Use Risk Profile Scale (SURPS), could play a key role in the onset and escalation of substance use. This study aimed to examine (1) measurement invariance across age and gender (2) the effects of age and gender on associations between SURPS scores and the most frequently-consumed substances. METHODS Analyses were based on the responses from 5069 participants (aged 14-20 years) from the 2011 ESPAD-France dataset. Substance-use outcomes were experimentation and current frequency of alcohol, tobacco and cannabis use, and drunkenness. RESULTS Our approach, consisting in analysing measurement and structural invariance and interaction terms, established the stability of (i) SURPS profiles, and (ii) relationships between these scores and substance experimentation and use over a developmental period ranging from mid-adolescence to early adulthood. Measurement invariance across genders was also confirmed despite the absence of scalar invariance for 2 items. Significant interactions between gender and SURPS factors were established, highlighting differential vulnerability, especially concerning Hopelessness and experimentation of alcohol and drunkenness, or Impulsivity and tobacco experimentation. Finally, Anxiety Sensitivity could be protective against substance use, especially for cannabis in girls. CONCLUSIONS Our results suggest the relevance of the SURPS to assess vulnerability towards drug use, and underline the need to consider gender differences in addiction risks.
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Affiliation(s)
- A Ali
- Inserm, CESP, 97 bd Port Royal, Paris F-75014, France; Université Paris Descartes, 12 rue de l'Ecole de Médecine, Paris F-75006, France; Université Paris Sud, 63 rue Gabriel Péri Le Kremlin-Bicêtre, F- 94270, France
| | - A Carré
- Inserm, CESP, 97 bd Port Royal, Paris F-75014, France; Université Paris Descartes, 12 rue de l'Ecole de Médecine, Paris F-75006, France; Université Paris Sud, 63 rue Gabriel Péri Le Kremlin-Bicêtre, F- 94270, France; Université Savoie Mont Blanc, LIPPC2S, Domaine universitaire de Jacob, Chambéry-Grenoble (EA 4145), Chambéry F-73000, France
| | - C Hassler
- Inserm, CESP, 97 bd Port Royal, Paris F-75014, France; Université Paris Descartes, 12 rue de l'Ecole de Médecine, Paris F-75006, France; Université Paris Sud, 63 rue Gabriel Péri Le Kremlin-Bicêtre, F- 94270, France
| | - S Spilka
- Observatoire Français des Drogues et des Toxicomanies (OFDT), 3 avenue du Stade de France, La Plaine Saint-Denis, F-93210, France
| | - A Vanier
- Sorbonne Universités, UPMC Univ. Paris 6, 4 place Jussieu, Paris F-75005, France; AP-HP Hôpitaux Universitaires Pitié-Salpêtrière Charles-Foix, Département de Biostatistique Santé Publique et Information Médicale, Paris F-75013, France
| | - C Barry
- Inserm, CESP, 97 bd Port Royal, Paris F-75014, France; Université Paris Descartes, 12 rue de l'Ecole de Médecine, Paris F-75006, France; Université Paris Sud, 63 rue Gabriel Péri Le Kremlin-Bicêtre, F- 94270, France
| | - S Berthoz
- Inserm, CESP, 97 bd Port Royal, Paris F-75014, France; Université Paris Descartes, 12 rue de l'Ecole de Médecine, Paris F-75006, France; Université Paris Sud, 63 rue Gabriel Péri Le Kremlin-Bicêtre, F- 94270, France; Institut Mutualiste Montsouris, Département de Psychiatrie, 42 bd Jourdan, Paris F-75014, France.
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91
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Aznar S, Hervig MES. The 5-HT2A serotonin receptor in executive function: Implications for neuropsychiatric and neurodegenerative diseases. Neurosci Biobehav Rev 2016; 64:63-82. [DOI: 10.1016/j.neubiorev.2016.02.008] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 11/05/2015] [Accepted: 02/08/2016] [Indexed: 02/07/2023]
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92
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Belin-Rauscent A, Daniel ML, Puaud M, Jupp B, Sawiak S, Howett D, McKenzie C, Caprioli D, Besson M, Robbins TW, Everitt BJ, Dalley JW, Belin D. From impulses to maladaptive actions: the insula is a neurobiological gate for the development of compulsive behavior. Mol Psychiatry 2016; 21:491-9. [PMID: 26370145 DOI: 10.1038/mp.2015.140] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 07/15/2015] [Accepted: 08/10/2015] [Indexed: 02/06/2023]
Abstract
Impulsivity is an endophenotype of vulnerability for compulsive behaviors. However, the neural mechanisms whereby impulsivity facilitates the development of compulsive disorders, such as addiction or obsessive compulsive disorder, remain unknown. We first investigated, in rats, anatomical and functional correlates of impulsivity in the anterior insular (AI) cortex by measuring both the thickness of, and cellular plasticity markers in, the AI with magnetic resonance imaging and in situ hybridization of the immediate early gene zif268, respectively. We then investigated the influence of bilateral AI cortex lesions on the high impulsivity trait, as measured in the five-choice serial reaction time task (5-CSRTT), and the associated propensity to develop compulsivity as measured by high drinking levels in a schedule-induced polydipsia procedure (SIP). We demonstrate that the AI cortex causally contributes to individual vulnerability to impulsive-compulsive behavior in rats. Motor impulsivity, as measured by premature responses in the 5-CSRTT, was shown to correlate with the thinness of the anterior region of the insular cortex, in which highly impulsive (HI) rats expressed lower zif268 mRNA levels. Lesions of AI reduced impulsive behavior in HI rats, which were also highly susceptible to develop compulsive behavior as measured in a SIP procedure. AI lesions also attenuated both the development and the expression of SIP. This study thus identifies the AI as a novel neural substrate of maladaptive impulse control mechanisms that may facilitate the development of compulsive disorders.
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Affiliation(s)
- A Belin-Rauscent
- Department of Pharmacology, University of Cambridge, Cambridge, UK.,Behavioral and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK
| | - M-L Daniel
- Inserm CIC-1402, Université de Poitiers, Poitiers, France
| | - M Puaud
- Department of Pharmacology, University of Cambridge, Cambridge, UK.,Behavioral and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK
| | - B Jupp
- Behavioral and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK.,Department of Psychology, University of Cambridge, Cambridge, UK
| | - S Sawiak
- Behavioral and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK
| | - D Howett
- Department of Pharmacology, University of Cambridge, Cambridge, UK
| | - C McKenzie
- Department of Pharmacology, University of Cambridge, Cambridge, UK
| | - D Caprioli
- Behavioral Neuroscience Branch, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD, USA
| | - M Besson
- Neurobiologie Intégrative des Systèmes Cholinergiques, Institut Pasteur, Paris, France
| | - T W Robbins
- Behavioral and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK.,Department of Psychology, University of Cambridge, Cambridge, UK
| | - B J Everitt
- Behavioral and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK.,Department of Psychology, University of Cambridge, Cambridge, UK
| | - J W Dalley
- Behavioral and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK.,Department of Psychology, University of Cambridge, Cambridge, UK.,Department of Psychiatry, University of Cambridge, Cambridge, UK
| | - D Belin
- Department of Pharmacology, University of Cambridge, Cambridge, UK.,Behavioral and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK
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93
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Beckwith SW, Czachowski CL. Alcohol-Preferring P Rats Exhibit Elevated Motor Impulsivity Concomitant with Operant Responding and Self-Administration of Alcohol. Alcohol Clin Exp Res 2016; 40:1100-10. [PMID: 27028842 DOI: 10.1111/acer.13044] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 02/05/2016] [Indexed: 12/01/2022]
Abstract
BACKGROUND Increased levels of impulsivity are associated with increased illicit drug use and alcoholism. Previous research in our laboratory has shown that increased levels of delay discounting (a decision-making form of impulsivity) are related to appetitive processes governing alcohol self-administration as opposed to purely consummatory processes. Specifically, the high-seeking/high-drinking alcohol-preferring P rats showed increased delay discounting compared to nonselected Long Evans rats (LE) whereas the high-drinking/moderate-seeking HAD2 rats did not. The P rats also displayed a perseverative pattern of behavior such that during operant alcohol self-administration they exhibited greater resistance to extinction. METHODS One explanation for the previous findings is that P rats have a deficit in response inhibition. This study followed up on this possibility by utilizing a countermanding paradigm (stop signal reaction time [SSRT] task) followed by operant self-administration of alcohol across increasing fixed ratio requirements (FR; 1, 2, 5, 10, and 15 responses). In separate animals, 24-hour access 2-bottle choice (10% EtOH vs. water) drinking was assessed. RESULTS In the SSRT task, P rats exhibited an increased SSRT compared to both LE and HAD2 rats indicating a decrease in behavioral inhibition in the P rats. Also, P rats showed increased operant self-administration across all FRs and the greatest increase in responding with increasing FR requirements. Conversely, the HAD2 and LE had shorter SSRTs and lower levels of operant alcohol self-administration. However, for 2-bottle choice drinking HAD2s and P rats consumed more EtOH and had a greater preference for EtOH compared to LE. CONCLUSIONS These data extend previous findings showing the P rats to have increased delay discounting (decision-making impulsivity) and suggest that P rats also have a lack of behavioral inhibition (motor impulsivity). This supports the notion that P rats are a highly impulsive as well as "high-seeking" model of alcoholism, and that the HAD2s' elevated levels of alcohol consumption are not mediated via appetitive processes or impulsivity.
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Affiliation(s)
- Steven Wesley Beckwith
- Department of Psychology (SWB, CLC), Indiana University Purdue University Indianapolis, Indianapolis, Indiana
| | - Cristine Lynn Czachowski
- Department of Psychology (SWB, CLC), Indiana University Purdue University Indianapolis, Indianapolis, Indiana
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94
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Reiter AMF, Deserno L, Wilbertz T, Heinze HJ, Schlagenhauf F. Risk Factors for Addiction and Their Association with Model-Based Behavioral Control. Front Behav Neurosci 2016; 10:26. [PMID: 27013998 PMCID: PMC4794491 DOI: 10.3389/fnbeh.2016.00026] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Accepted: 02/04/2016] [Indexed: 01/17/2023] Open
Abstract
Addiction shows familial aggregation and previous endophenotype research suggests that healthy relatives of addicted individuals share altered behavioral and cognitive characteristics with individuals suffering from addiction. In this study we asked whether impairments in behavioral control proposed for addiction, namely a shift from goal-directed, model-based toward habitual, model-free control, extends toward an unaffected sample (n = 20) of adult children of alcohol-dependent fathers as compared to a sample without any personal or family history of alcohol addiction (n = 17). Using a sequential decision-making task designed to investigate model-free and model-based control combined with a computational modeling analysis, we did not find any evidence for altered behavioral control in individuals with a positive family history of alcohol addiction. Independent of family history of alcohol dependence, we however observed that the interaction of two different risk factors of addiction, namely impulsivity and cognitive capacities, predicts the balance of model-free and model-based behavioral control. Post-hoc tests showed a positive association of model-based behavior with cognitive capacity in the lower, but not in the higher impulsive group of the original sample. In an independent sample of particularly high- vs. low-impulsive individuals, we confirmed the interaction effect of cognitive capacities and high vs. low impulsivity on model-based control. In the confirmation sample, a positive association of omega with cognitive capacity was observed in highly impulsive individuals, but not in low impulsive individuals. Due to the moderate sample size of the study, further investigation of the association of risk factors for addiction with model-based behavior in larger sample sizes is warranted.
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Affiliation(s)
- Andrea M F Reiter
- Max Planck Fellow Group 'Cognitive and Affective Control of Behavioral Adaptation,' Max Planck Institute for Human Cognitive and Brain SciencesLeipzig, Germany; Lifespan Developmental Neuroscience, Department of Psychology, Technical University of DresdenDresden, Germany
| | - Lorenz Deserno
- Max Planck Fellow Group 'Cognitive and Affective Control of Behavioral Adaptation,' Max Planck Institute for Human Cognitive and Brain SciencesLeipzig, Germany; Department of Psychiatry and Psychotherapy, Campus Charité MitteCharité - Universitätsmedizin Berlin, Germany; Department of Neurology, Otto-von-Guericke UniversityMagdeburg, Germany
| | - Tilmann Wilbertz
- Max Planck Fellow Group 'Cognitive and Affective Control of Behavioral Adaptation,' Max Planck Institute for Human Cognitive and Brain Sciences Leipzig, Germany
| | - Hans-Jochen Heinze
- Max Planck Fellow Group 'Cognitive and Affective Control of Behavioral Adaptation,' Max Planck Institute for Human Cognitive and Brain SciencesLeipzig, Germany; Department of Neurology, Otto-von-Guericke UniversityMagdeburg, Germany; Department of Behavioral Neurology, Leibniz Institute for Neurobiology, Otto-von-Guericke UniversityMagdeburg, Germany
| | - Florian Schlagenhauf
- Max Planck Fellow Group 'Cognitive and Affective Control of Behavioral Adaptation,' Max Planck Institute for Human Cognitive and Brain SciencesLeipzig, Germany; Department of Psychiatry and Psychotherapy, Campus Charité MitteCharité - Universitätsmedizin Berlin, Germany
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95
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Systems genetics of intravenous cocaine self-administration in the BXD recombinant inbred mouse panel. Psychopharmacology (Berl) 2016; 233:701-14. [PMID: 26581503 PMCID: PMC4803082 DOI: 10.1007/s00213-015-4147-z] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 10/31/2015] [Indexed: 12/31/2022]
Abstract
RATIONALE Cocaine addiction is a major public health problem with a substantial genetic basis for which the biological mechanisms remain largely unknown. Systems genetics is a powerful method for discovering novel mechanisms underlying complex traits, and intravenous drug self-administration (IVSA) is the gold standard for assessing volitional drug use in preclinical studies. We have integrated these approaches to identify novel genes and networks underlying cocaine use in mice. METHODS Mice from 39 BXD strains acquired cocaine IVSA (0.56 mg/kg/infusion). Mice from 29 BXD strains completed a full dose-response curve (0.032-1.8 mg/kg/infusion). We identified independent genetic correlations between cocaine IVSA and measures of environmental exploration and cocaine sensitization. We identified genome-wide significant quantitative trait loci (QTL) on chromosomes 7 and 11 associated with shifts in the dose-response curve and on chromosome 16 associated with sessions to acquire cocaine IVSA. Using publicly available gene expression data from the nucleus accumbens, midbrain, and prefrontal cortex of drug-naïve mice, we identified Aplp1 and Cyfip2 as positional candidates underlying the behavioral QTL on chromosomes 7 and 11, respectively. A genome-wide significant trans-eQTL linking Fam53b (a GWAS candidate for human cocaine dependence) on chromosome 7 to the cocaine IVSA behavioral QTL on chromosome 11 was identified in the midbrain; Fam53b and Cyfip2 were co-expressed genome-wide significantly in the midbrain. This finding indicates that cocaine IVSA studies using mice can identify genes involved in human cocaine use. CONCLUSIONS These data provide novel candidate genes underlying cocaine IVSA in mice and suggest mechanisms driving human cocaine use.
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96
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Rezapour T, DeVito EE, Sofuoglu M, Ekhtiari H. Perspectives on neurocognitive rehabilitation as an adjunct treatment for addictive disorders. PROGRESS IN BRAIN RESEARCH 2016; 224:345-69. [DOI: 10.1016/bs.pbr.2015.07.022] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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97
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Neuroscience of resilience and vulnerability for addiction medicine. PROGRESS IN BRAIN RESEARCH 2016; 223:3-18. [DOI: 10.1016/bs.pbr.2015.09.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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98
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Cadet JL. Epigenetics of Stress, Addiction, and Resilience: Therapeutic Implications. Mol Neurobiol 2016; 53:545-560. [PMID: 25502297 PMCID: PMC4703633 DOI: 10.1007/s12035-014-9040-y] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 11/30/2014] [Indexed: 12/12/2022]
Abstract
Substance use disorders (SUDs) are highly prevalent. SUDs involve vicious cycles of binges followed by occasional periods of abstinence with recurrent relapses despite treatment and adverse medical and psychosocial consequences. There is convincing evidence that early and adult stressful life events are risks factors for the development of addiction and serve as cues that trigger relapses. Nevertheless, the fact that not all individuals who face traumatic events develop addiction to licit or illicit drugs suggests the existence of individual and/or familial resilient factors that protect these mentally healthy individuals. Here, I give a brief overview of the epigenetic bases of responses to stressful events and of epigenetic changes associated with the administration of drugs of abuse. I also discuss the psychobiology of resilience and alterations in epigenetic markers that have been observed in models of resilience. Finally, I suggest the possibility that treatment of addiction should involve cognitive and pharmacological approaches that enhance resilience in at risk individuals. Similar approaches should also be used with patients who have already succumbed to the nefarious effects of addictive substances.
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Affiliation(s)
- Jean Lud Cadet
- Molecular Neuropsychiatry Research Branch, DHHS/NIH/NIDA Intramural Research Program, National Institutes of Health, 251 Bayview Boulevard, Baltimore, MD, 21224, USA.
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99
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Rodríguez-Arias M, Roger-Sánchez C, Vilanova I, Revert N, Manzanedo C, Miñarro J, Aguilar MA. Effects of Cannabinoid Exposure during Adolescence on the Conditioned Rewarding Effects of WIN 55212-2 and Cocaine in Mice: Influence of the Novelty-Seeking Trait. Neural Plast 2015; 2016:6481862. [PMID: 26881125 PMCID: PMC4736006 DOI: 10.1155/2016/6481862] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 09/01/2015] [Accepted: 09/17/2015] [Indexed: 11/17/2022] Open
Abstract
Adolescent exposure to cannabinoids enhances the behavioural effects of cocaine, and high novelty-seeking trait predicts greater sensitivity to the conditioned place preference (CPP) induced by this drug. Our aim was to evaluate the influence of novelty-seeking on the effects of adolescent cannabinoid exposure. Adolescent male mice were classified as high or low novelty seekers (HNS and LNS) in the hole-board test. First, we evaluated the CPP induced by the cannabinoid agonist WIN 55212-2 (0.05 and 0.075 mg/kg, i.p.) in HNS and LNS mice. Then, HNS and LNS mice were pretreated i.p. with vehicle, WIN 55212-2 (0.1 mg/kg), or cannabinoid antagonist rimonabant (1 mg/kg) and were subsequently conditioned with WIN 55212-2 (0.05 mg/kg, i.p.) or cocaine (1 or 6 mg/kg, i.p.). Only HNS mice conditioned with the 0.075 mg/kg dose acquired CPP with WIN 55212-2. Adolescent exposure to this cannabinoid agonist increased the rewarding effects of 1 mg/kg of cocaine in both HNS and LNS mice, and in HNS mice it also increased the reinstating effect of a low dose of cocaine. Our results endorse a role for individual differences such as a higher propensity for sensation-seeking in the development of addiction.
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Affiliation(s)
- M. Rodríguez-Arias
- Unidad de Investigación Psicobiología de las Drogodependencias, Departamento de Psicobiologia, Facultad de Psicología, Universidad de Valencia, 46010 Valencia, Spain
| | - C. Roger-Sánchez
- Unidad de Investigación Psicobiología de las Drogodependencias, Departamento de Psicobiologia, Facultad de Psicología, Universidad de Valencia, 46010 Valencia, Spain
| | - I. Vilanova
- Unidad de Investigación Psicobiología de las Drogodependencias, Departamento de Psicobiologia, Facultad de Psicología, Universidad de Valencia, 46010 Valencia, Spain
| | - N. Revert
- Unidad de Investigación Psicobiología de las Drogodependencias, Departamento de Psicobiologia, Facultad de Psicología, Universidad de Valencia, 46010 Valencia, Spain
| | - C. Manzanedo
- Unidad de Investigación Psicobiología de las Drogodependencias, Departamento de Psicobiologia, Facultad de Psicología, Universidad de Valencia, 46010 Valencia, Spain
| | - J. Miñarro
- Unidad de Investigación Psicobiología de las Drogodependencias, Departamento de Psicobiologia, Facultad de Psicología, Universidad de Valencia, 46010 Valencia, Spain
| | - M. A. Aguilar
- Unidad de Investigación Psicobiología de las Drogodependencias, Departamento de Psicobiologia, Facultad de Psicología, Universidad de Valencia, 46010 Valencia, Spain
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100
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Morein-Zamir S, Robbins TW. Fronto-striatal circuits in response-inhibition: Relevance to addiction. Brain Res 2015; 1628:117-29. [PMID: 25218611 PMCID: PMC4686018 DOI: 10.1016/j.brainres.2014.09.012] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 08/28/2014] [Accepted: 09/03/2014] [Indexed: 12/29/2022]
Abstract
Disruptions to inhibitory control are believed to contribute to multiple aspects of drug abuse, from preexisting vulnerability in at-risk individuals, through escalation to dependence, to promotion of relapse in chronic users. Paradigms investigating the suppression of actions have been investigated in animal and human research on drug addiction. Rodent research has focused largely on impulsive behaviors, often gauged by premature responding, as a viable model highlighting the relevant role of dopamine and other neurotransmitters primarily in the striatum. Human research on action inhibition in stimulant dependence has highlighted impaired performance and largely prefrontal cortical abnormalities as part of a broader pattern of cognitive abnormalities. Animal and human research implicate inhibitory difficulties mediated by fronto-striatal circuitry both preceding and as a result of excessive stimulus use. In this regard, response-inhibition has proven a useful cognitive function to gauge the integrity of fronto-striatal systems and their role in contributing to impulsive and compulsive features of drug dependence.
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Affiliation(s)
- Sharon Morein-Zamir
- Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge CB2 3EB, UK; Department of Psychology, University of Cambridge, Cambridge CB2 0SZ, UK.
| | - Trevor W Robbins
- Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge CB2 3EB, UK; Department of Psychology, University of Cambridge, Cambridge CB2 0SZ, UK
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