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Rauhut AS. Propranolol blocks the unconditioned and conditioned hyperactive effects of methamphetamine in CD-1 mice. Behav Pharmacol 2023; 34:375-379. [PMID: 37462146 PMCID: PMC10530526 DOI: 10.1097/fbp.0000000000000742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
The present experiment examined the contribution of the β-adrenergic receptor system in mediating the unconditioned (i.e. pharmacological) and conditioned (i.e. learned) hyperactive effects of methamphetamine. To this end, mice underwent an 8-day conditioning procedure involving two different, alternating session types (chamber and home-cage days). On chamber days (1, 3, 5, and 7), mice were injected (intraperitoneally) with vehicle (dH 2 O) or propranolol (16 or 32 mg/kg) and were injected (subcutaneously) 30 min (min) later by either vehicle (saline; unpaired) or methamphetamine (1.0 mg/kg; paired). On home-cage days (2, 4, 6, and 8), mice were injected (subcutaneously) with either vehicle (saline; paired) or methamphetamine (1.0 mg/kg; unpaired) in their home cages. The test day for conditioned hyperactivity occurred 48 h after the last chamber day. Propranolol dose-dependently blocked the unconditioned and conditioned hyperactive effects of methamphetamine, implicating a role for the β-adrenergic system in mediating these effects of methamphetamine.
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Affiliation(s)
- Anthony S Rauhut
- Psychology Department and Neuroscience Program, Dickinson College, Carlisle, PA, USA
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2
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Tardelli VS, Berro LF, Gerra G, Tadonio L, Bisaga A, Fidalgo TM. Prescription psychostimulants for cocaine use disorder: A review from molecular basis to clinical approach. Addict Biol 2023; 28:e13271. [PMID: 37016755 PMCID: PMC10499006 DOI: 10.1111/adb.13271] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 12/20/2022] [Accepted: 02/13/2023] [Indexed: 03/05/2023]
Abstract
Cocaine use is a public health concern in many countries worldwide, particularly in the Americas and Oceania. Overdose deaths involving stimulants, such as cocaine, have been increasing markedly in North America, especially with concurrent opioid involvement. To date, no pharmacological treatment is available to treat stimulant (including cocaine) use disorders. Prescription psychostimulants (PPs) could be useful to treat cocaine use disorder (CUD) as they share the pharmacological effects with cocaine, as evidenced by a recent meta-analysis that assessed 38 randomized clinical trials (RCTs). PPs were found to promote sustained abstinence and reduce drug use in patients with CUD. The aim of this paper is to provide a narrative review of the clinical pharmacology of PPs and comment on the current stage of evidence supporting PPs to treat CUD. We also propose a model of care that integrates PPs with evidence-based psychosocial interventions (such as cognitive-behavioural therapy [CBT] and contingency management [CM]), a harm reduction approach and case management with social support.
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Affiliation(s)
- Vitor S. Tardelli
- Departamento de Psiquiatria, Universidade Federal de Sao Paulo (Unifesp), Sao Paulo, SP, Brazil
- Translational Addiction Research Laboratory, Center for Addiction and Mental Health, Toronto, ON, Canada
| | - Lais F. Berro
- Department of Psychiatry and Human Behavior, University of Mississipi Medical Center, Jackson, MS, USA
| | - Gilberto Gerra
- Mental Health Department, Azienda Unitá Sanitaria Locale, Parma, Italy
| | - Leonardo Tadonio
- Mental Health Department, Azienda Unitá Sanitaria Locale, Parma, Italy
| | - Adam Bisaga
- The Department of Psychiatry, Vagelos College of Physicians and Surgeons, Columbia University and the New York State Psychiatric Institute, New York, NY, USA
| | - Thiago M. Fidalgo
- Departamento de Psiquiatria, Universidade Federal de Sao Paulo (Unifesp), Sao Paulo, SP, Brazil
- Young Leaders Program from the National Academy of Medicine, Brazil
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Godara M, Silveira S, Matthäus H, Singer T. The Wither or Thrive Model of Resilience: an Integrative Framework of Dynamic Vulnerability and Resilience in the Face of Repeated Stressors During the COVID-19 Pandemic. ADVERSITY AND RESILIENCE SCIENCE 2022; 3:261-282. [PMID: 35856054 PMCID: PMC9281234 DOI: 10.1007/s42844-022-00069-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Accepted: 06/30/2022] [Indexed: 11/22/2022]
Abstract
During the first 2 years of the COVID-19 pandemic, empirical efforts in the psychological sciences have been unequivocally focused on understanding the psychosocial impact on resilience and vulnerability. While current empirical work is guided by different existing theoretical models of resilience and vulnerability, the emerging datasets have also pointed to a necessity for an update of these models. Due to the unique features and developments specific to the current pandemic such as the occurrence of repeated collective stressors of varying durations, in the current position paper, we introduce the Wither or Thrive model of Resilience (With:Resilience). It integrates key aspects of prevailing psychological resilience frameworks within the context of the COVID-19 pandemic, and extends them by (1) moving away from single scale approaches towards a higher-order latent expression of resilience and vulnerability incorporating also non-clinical mental health markers, (2) proposing different trajectories of resilience-vulnerability emerging across repeated stressors over long periods of time, and (3) by incorporating multiple influencing factors including aspects of the socio-economic concept of social cohesion as well as separate mediating processing mechanisms. We propose that With:Resilience will enable a more nuanced approach and appropriate analytical investigation of the vast incoming data on mental health and resilience during the COVID-19 pandemic, and we suggest some concrete methodological approaches. This framework will assist in the development of actionable public health guidelines for society in the present and future pandemic contexts as well as aid policy making and the interventional sciences aimed at protecting the most vulnerable amongst us.
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Affiliation(s)
- Malvika Godara
- Social Neuroscience Lab, Max Planck Society, JFK Haus, Bertha-Benz-Str. 3, 10557 Berlin, Germany
| | - Sarita Silveira
- Social Neuroscience Lab, Max Planck Society, JFK Haus, Bertha-Benz-Str. 3, 10557 Berlin, Germany
| | - Hannah Matthäus
- Social Neuroscience Lab, Max Planck Society, JFK Haus, Bertha-Benz-Str. 3, 10557 Berlin, Germany
| | - Tania Singer
- Social Neuroscience Lab, Max Planck Society, JFK Haus, Bertha-Benz-Str. 3, 10557 Berlin, Germany
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4
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Psychosocial Factors Predict the Level of Substance Craving of People with Drug Addiction: A Machine Learning Approach. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182212175. [PMID: 34831930 PMCID: PMC8621163 DOI: 10.3390/ijerph182212175] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 11/12/2021] [Accepted: 11/16/2021] [Indexed: 11/16/2022]
Abstract
This study aimed to explore which factors had a greater impact on substance craving in people with substance use and the direction of the impact. A total of 895 male substance users completed questionnaires regarding substance craving, psychological security, positive psychological capital, interpersonal trust, alexithymia, impulsivity, parental conflict, aggression behavior, life events, family intimacy, and deviant peers. Calculating the factor importance by gradient boosting method (GBM), found that the psychosocial factors that had a greater impact on substance craving were, in order, life events, aggression behavior, positive psychological capital, interpersonal trust, psychological security, impulsivity, alexithymia, family intimacy, parental conflict, and deviant peers. Correlation analysis showed that life events, positive psychological capital, interpersonal trust, psychological security, and family intimacy negatively predicted substance craving, while aggression behavior, impulsivity, alexithymia, parental conflict, and deviant peers positively predicted substance cravings. These findings have important implications for the prevention and intervention of substance craving behavior among substance users.
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Folco KL, Fridberg DJ, Arcurio LR, Finn PR, Heiman JR, James TW. Neural mechanisms of sexual decision-making in women with alcohol use disorder. Psychopharmacology (Berl) 2021; 238:1867-1883. [PMID: 33738536 PMCID: PMC8238910 DOI: 10.1007/s00213-021-05815-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 03/01/2021] [Indexed: 10/21/2022]
Abstract
RATIONALE The co-occurrence of alcohol consumption and sexual activity is associated with increased risk for sexual assault, sexually transmitted disease, and unplanned pregnancy among young adult women with alcohol use disorder (AUD). There is considerable previous work demonstrating neural reactivity to alcohol cues in AUD. Because alcohol consumption and sexual behavior are both rewarding and tend to co-occur, sexual cues may produce similar neural reactivity in women with AUD, possibly indicating a shared mechanism underlying reactivity to both types of cues. Alternatively, reactivity to alcohol versus sexual cues may be distinct, suggesting domain-specific mechanisms. OBJECTIVES We investigated whether the decision vulnerabilities in AUD women regarding sexual activity were related to differences in brain activation compared to control women. METHODS Women with (n = 15) and without (n = 16) AUD completed a hypothetical decision-making task during fMRI that presented low- or high-risk scenarios involving visual sexual, appetitive, and neutral cues. RESULTS Results showed that sexual cues were more often endorsed by women with AUD compared to controls and elicited differential brain activation patterns in frontal, visual, and reward regions. During high-risk decisions, women with AUD failed to downregulate activation, causing hyperactivation compared to controls. CONCLUSIONS Visual sexual cues produced reactivity like that previously demonstrated for alcohol cues, suggesting a shared or domain-general mechanism for alcohol and sexual cue reactivity in women with AUD. Riskier sexual decisions in women with AUD may be a consequence of repeatedly pairing alcohol use and sexual activity, a characteristic behavior of this population.
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Affiliation(s)
- Kess L Folco
- Department of Psychological and Brain Sciences, Indiana University, 1101 E 10th St, Bloomington, IN, 47405, USA
| | - Daniel J Fridberg
- Department of Psychiatry and Behavioral Neuroscience, The University of Chicago, Chicago, IL, USA
| | - Lindsay R Arcurio
- Department of Psychological and Brain Sciences, Indiana University, 1101 E 10th St, Bloomington, IN, 47405, USA
| | - Peter R Finn
- Department of Psychological and Brain Sciences, Indiana University, 1101 E 10th St, Bloomington, IN, 47405, USA
| | - Julia R Heiman
- Department of Psychological and Brain Sciences, Indiana University, 1101 E 10th St, Bloomington, IN, 47405, USA
| | - Thomas W James
- Department of Psychological and Brain Sciences, Indiana University, 1101 E 10th St, Bloomington, IN, 47405, USA.
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Takahashi TT, Ornello R, Quatrosi G, Torrente A, Albanese M, Vigneri S, Guglielmetti M, Maria De Marco C, Dutordoir C, Colangeli E, Fuccaro M, Di Lenola D, Spuntarelli V, Pilati L, Di Marco S, Van Dycke A, Abdullahi RA, Maassen van den Brink A, Martelletti P. Medication overuse and drug addiction: a narrative review from addiction perspective. J Headache Pain 2021; 22:32. [PMID: 33910499 PMCID: PMC8080402 DOI: 10.1186/s10194-021-01224-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 03/12/2021] [Indexed: 12/27/2022] Open
Abstract
Chronic headache is particularly prevalent in migraineurs and it can progress to a condition known as medication overuse headache (MOH). MOH is a secondary headache caused by overuse of analgesics or other medications such as triptans to abort acute migraine attacks. The worsening of headache symptoms associated with medication overuse (MO) generally ameliorates following interruption of regular medication use, although the primary headache symptoms remain unaffected. MO patients may also develop certain behaviors such as ritualized drug administration, psychological drug attachment, and withdrawal symptoms that have been suggested to correlate with drug addiction. Although several reviews have been performed on this topic, to the authors best knowledge none of them have examined this topic from the addiction point of view. Therefore, we aimed to identify features in MO and drug addiction that may correlate. We initiate the review by introducing the classes of analgesics and medications that can cause MOH and those with high risk to produce MO. We further compare differences between sensitization resulting from MO and from drug addiction, the neuronal pathways that may be involved, and the genetic susceptibility that may overlap between the two conditions. Finally, ICHD recommendations to treat MOH will be provided herein.
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Affiliation(s)
- Tatiane Teru Takahashi
- Headache Research, Wolfson CARD, Institute of Psychiatry, Psychology & Neuroscience, King's College London, 20 Newcomen St, London, SE1 1YR, UK. .,Present address: Medicines Discovery Catapult, Block 35, Mereside, Alderley Park, Cheshire, SK10 4TG, UK.
| | - Raffaele Ornello
- Neuroscience Section, Department of Applied Clinical Sciences and Biotechnology, University of L'Aquila, Via Vetoio 1, Coppito, 67100, L'Aquila, Italy
| | - Giuseppe Quatrosi
- Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties (PROMISE), University of Palermo, Piazza delle Cliniche 2, 90127, Palermo, Italy
| | - Angelo Torrente
- Department of Biomedicine, Neurosciences and Diagnostic (Bi.N.D.), University of Palermo, Via del Vespro 129, 90127, Palermo, Italy
| | - Maria Albanese
- Department of Systems Medicine, University of Rome "Tor Vergata"; Neurology Unit, "Tor Vergata" Hospital, Viale Oxford, 81, 00133, Rome, Italy
| | - Simone Vigneri
- Department of Experimental Biomedicine and Clinical Neurosciences, University of Palermo, Via del Vespro, 129, 90127, Palermo, Italy.,Pain Medicine Unit, Santa Maria Maddalena Hospital, Occhiobello, Italy
| | - Martina Guglielmetti
- Regional Headache Referral Center, Sant'Andrea Hospital, Via di Grottarossa 1039, 00189, Rome, Italy.,Department of Medical, Surgical and Experimental Sciences, University of Sassari, Piazza Università, 21, 07100, Sassari, Italy
| | - Cristiano Maria De Marco
- Regional Headache Referral Center, Sant'Andrea Hospital, Via di Grottarossa 1039, 00189, Rome, Italy
| | - Camille Dutordoir
- Department of Neurology, University Hospital Ghent, Corneel Heymanslaan 10, 9000, Ghent, Belgium
| | - Enrico Colangeli
- Present address: Medicines Discovery Catapult, Block 35, Mereside, Alderley Park, Cheshire, SK10 4TG, UK
| | - Matteo Fuccaro
- Department of Neurology, Conegliano Hospital, Via Brigata Bisagno, 2, 31015, Conegliano, Italy
| | - Davide Di Lenola
- Department of Medico-Surgical Sciences and Biotechnologies, "Sapienza" University of Rome, Polo Pontino, Viale XXIV Maggio 7, 04100, Latina, Italy
| | - Valerio Spuntarelli
- Division of Pharmacology, Department of Internal Medicine, Erasmus MC University Medical Centre Rotterdam, Wytemaweg 80, 3015, CN, Rotterdam, The Netherlands
| | - Laura Pilati
- Department of Biomedicine, Neurosciences and Diagnostic (Bi.N.D.), University of Palermo, Via del Vespro 129, 90127, Palermo, Italy
| | - Salvatore Di Marco
- Department of Biomedicine, Neurosciences and Diagnostic (Bi.N.D.), University of Palermo, Via del Vespro 129, 90127, Palermo, Italy
| | - Annelies Van Dycke
- Department of Neurology, AZ Sint-Jan Brugge, Ruddershove 10, 8000, Brugge, Belgium
| | - Ramla Abuukar Abdullahi
- Headache Research, Wolfson CARD, Institute of Psychiatry, Psychology & Neuroscience, King's College London, 20 Newcomen St, London, SE1 1YR, UK.,Headache Centre, Guy's and St Thomas NHS Trust, London, UK
| | | | - Paolo Martelletti
- Regional Headache Referral Center, Sant'Andrea Hospital, Via di Grottarossa 1039, 00189, Rome, Italy.,Department of Clinical and Molecular Medicine, Sapienza University of Rome, Via di Grottarossa 1039, 00189, Rome, Italy
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Dopamine 'ups and downs' in addiction revisited. Trends Neurosci 2021; 44:516-526. [PMID: 33892963 DOI: 10.1016/j.tins.2021.03.003] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 01/14/2021] [Accepted: 03/16/2021] [Indexed: 12/11/2022]
Abstract
Repeated drug use can change dopamine (DA) function in ways that promote the development and persistence of addiction, but in what direction? By one view, drug use blunts DA neurotransmission, producing a hypodopaminergic state that fosters further drug use to overcome a DA deficiency. Another view is that drug use enhances DA neurotransmission, producing a sensitized, hyperdopaminergic reaction to drugs and drug cues. According to this second view, continued drug use is motivated by sensitization of drug 'wanting'. Here we discuss recent evidence supporting the latter view, both from preclinical studies using intermittent cocaine self-administration procedures that mimic human patterns of use and from related human neuroimaging studies. These studies have implications for the modeling of addiction in the laboratory and for treatment.
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Effects of dopamine receptor antagonism and amphetamine-induced psychomotor sensitization on sign- and goal-tracking after extended training. Behav Brain Res 2021; 407:113238. [PMID: 33744334 DOI: 10.1016/j.bbr.2021.113238] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 02/20/2021] [Accepted: 03/10/2021] [Indexed: 12/20/2022]
Abstract
The dopamine system is important for incentive salience attribution, where motivational value is assigned to conditioned cues that predict appetitive reinforcers. However, the role of dopamine in this process may change with extended training. We tested the effects of dopamine D1-like and D2-like receptor antagonism on the expression of sign-tracking and goal-tracking conditioned responses following extended Pavlovian conditioned approach (PCA) training. We also tested if amphetamine-induced psychomotor sensitization accelerates the enhanced acquisition of sign-tracking that is observed with extended training. In experiment 1, 24 male Long-Evans rats received 20 PCA sessions in which one lever (CS+, 10 s) predicted 0.2 ml sucrose (10 %, w/v) delivery and the other lever (CS-) did not. SCH-23390 (D1-like antagonist) or eticlopride (D2-like antagonist) were administered before non-reinforced behavioural tests at doses of 0, 0.01, and 0.1 mg/kg (s.c.). In experiment 2, rats received vehicle or 2 mg/kg amphetamine (i.p.) for 7 days (n = 12/group). Ten days later, they received 16 PCA training sessions. Both doses of SCH-23390 reduced sign- and goal-tracking, but also reduced locomotor behaviour. A low dose of eticlopride (0.01 mg/kg) selectively reduced goal-tracking, without affecting sign-tracking or locomotor behaviour. Amphetamine produced psychomotor sensitization, and this did not affect the acquisition of sign- or goal-tracking. Following extended PCA training, dopamine D2-like receptor activity is required for the expression of goal-tracking but not sign-tracking. Psychomotor sensitization to amphetamine did not impact incentive salience attribution; however, more selective manipulations of the dopamine system may be needed.
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Moreno M, Azocar V, Vergés A, Fuentealba JA. High impulsive choice is accompanied by an increase in dopamine release in rat dorsolateral striatum. Behav Brain Res 2021; 405:113199. [PMID: 33636234 DOI: 10.1016/j.bbr.2021.113199] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 02/17/2021] [Accepted: 02/18/2021] [Indexed: 02/05/2023]
Abstract
Dopamine neurotransmission has been consistently associated with individual differences in impulsive choice. Clinical and preclinical evidence suggests that low striatal dopamine D2 signaling predisposes to engage in impulsive behaviors. Although dopamine D2 signaling controls dopamine (DA) extracellular levels, the relationship between striatal dopamine extracellular levels and impulsive choice remains poorly understood. Using quantitative microdialysis, we investigated whether extracellular DA levels in rat dorsolateral striatum (DLS) correlates with preference for an immediate small reward or for a delayed larger reward. Rats were tested in a delay-discounting task and classified as high impulsive (HI) or low impulsive (LI) according to the area under the discounting curve (AUC). No-net flux microdialysis experiments, assessing basal DA release, DA-uptake, and DA extracellular concentration (DA Cext), were carried out in dorsolateral striatum (DLS) of urethane-anesthetized rats. Rats classified as HI showed a higher DA release compared with LI rats. Differences in DLS DA-uptake and DA Cext were non-significant. Importantly, a significant negative correlation was observed between AUC and DA release, indicating that the lower the AUC, the higher the DLS DA release. This finding shows that DA release is augmented in the DLS of rats classified as HI, suggesting that a hyper-activated nigro-striatal pathway contributes to impulsive choice.
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Affiliation(s)
- Macarena Moreno
- Department of Pharmacy and Interdisciplinary Center of Neuroscience, Faculty of Chemistry and Pharmacy, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Victor Azocar
- Department of Pharmacy and Interdisciplinary Center of Neuroscience, Faculty of Chemistry and Pharmacy, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Alvaro Vergés
- Escuela de Psicología, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - José Antonio Fuentealba
- Department of Pharmacy and Interdisciplinary Center of Neuroscience, Faculty of Chemistry and Pharmacy, Pontificia Universidad Católica de Chile, Santiago, Chile.
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10
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Qiu Z, Wang J. A voxel-wise meta-analysis of task-based functional MRI studies on impaired gain and loss processing in adults with addiction. J Psychiatry Neurosci 2021; 46:E128-E146. [PMID: 33185525 PMCID: PMC7955844 DOI: 10.1503/jpn.200047] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Disturbances in gain and loss processing have been extensively reported in adults with addiction, a brain disorder characterized by obsession with addictive substances or behaviours. Previous studies have provided conflicting results with respect to neural abnormalities in gain processing in addiction, and few investigations into loss processing. METHODS We conducted voxel-wise meta-analyses of abnormal task-evoked regional activities in adults with substance dependence and gambling addiction during the processing of gains and losses not related to their addiction (mainly monetary). We identified 24 studies, including 465 participants with substance dependence, 81 with gambling addiction and 490 healthy controls. RESULTS Compared with healthy controls, all participants with addictions showed hypoactivations in the prefrontal cortex, striatum and insula and hyperactivations in the default mode network during gain anticipation; hyperactivations in the prefrontal cortex and both hyper- and hypoactivations in the striatum during loss anticipation; and hyperactivations in the occipital lobe during gain outcome. In the substance dependence subgroup, activity in the occipital lobe was increased during gain anticipation but decreased during loss anticipation. LIMITATIONS We were unable to conduct meta-analyses in the gambling addiction subgroup because of a limited data set. We did not investigate the effects of clinical variables because of limited information. CONCLUSION The current study identified altered brain activity associated with higher- and lower-level function during gain and loss processing for non-addiction (mainly monetary) stimuli in adults with substance dependence and gambling addiction. Adults with addiction were more sensitive to anticipatory gains than losses at higher- and lower-level brain areas. These results may help us to better understand the pathology of gain and loss processing in addiction.
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Affiliation(s)
- Zeguo Qiu
- From the Department of Applied Psychology, Guangdong University of Foreign Studies, Guangzhou 510006, China (Qiu, Wang); and the School of Psychology, The University of Queensland, Brisbane 4067, Australia (Qiu)
| | - Junjing Wang
- From the Department of Applied Psychology, Guangdong University of Foreign Studies, Guangzhou 510006, China (Qiu, Wang); and the School of Psychology, The University of Queensland, Brisbane 4067, Australia (Qiu)
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Pimentel E, Sivalingam K, Doke M, Samikkannu T. Effects of Drugs of Abuse on the Blood-Brain Barrier: A Brief Overview. Front Neurosci 2020; 14:513. [PMID: 32670001 PMCID: PMC7326150 DOI: 10.3389/fnins.2020.00513] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 04/24/2020] [Indexed: 12/17/2022] Open
Abstract
The use of psychostimulants and alcohol disrupts blood-brain barrier (BBB) integrity, resulting in alterations to cellular function, and contributes to neurotoxicity. The BBB is the critical boundary of the central nervous system (CNS) where it maintains intracellular homeostasis and facilitates communication with the peripheral circulation. The BBB is regulated by tight junction (TJ) proteins that closely interact with endothelial cells (EC). The complex TJ protein network consists of transmembrane proteins, including claudins, occludins, and junction adhesion molecules (JAM), as well as cytoskeleton connected scaffolding proteins, zonula occludentes (ZO-1, 2, and 3). The use of psychostimulants and alcohol is known to affect the CNS and is implicated in various neurological disorders through neurotoxicity that partly results from increased BBB permeability. The present mini review primarily focuses on BBB structure and permeability. Moreover, we assess TJ protein and cytoskeletal changes induced by cocaine, methamphetamine, morphine, heroin, nicotine, and alcohol. These changes promote glial activation, enzyme potentiation, and BBB remodeling, which affect neuroinflammatory pathways. Although the effect of drugs of abuse on BBB integrity and the underlying mechanisms are well studied, the present review enhances the understanding of the underlying mechanisms through which substance abuse disorders cause BBB dysfunction.
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Affiliation(s)
- Emely Pimentel
- School of Medicine, St. George's University, Great River, NY, United States
| | - Kalaiselvi Sivalingam
- Department of Pharmaceutical Sciences, Irma Lerma Rangel College of Pharmacy, Texas A&M University, Kingsville, TX, United States
| | - Mayur Doke
- Department of Pharmaceutical Sciences, Irma Lerma Rangel College of Pharmacy, Texas A&M University, Kingsville, TX, United States
| | - Thangavel Samikkannu
- Department of Pharmaceutical Sciences, Irma Lerma Rangel College of Pharmacy, Texas A&M University, Kingsville, TX, United States
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12
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Rauhut AS, Warnick JA, Stasior AL. Differential effects of voluntary exercise on development and expression of methamphetamine conditioned hyperactivity and sensitization in mice. Pharmacol Biochem Behav 2020; 193:172934. [PMID: 32333921 DOI: 10.1016/j.pbb.2020.172934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 04/18/2020] [Accepted: 04/19/2020] [Indexed: 11/16/2022]
Abstract
The present experiments determined the effects of voluntary home-cage wheel running on the development (Experiments 1 and 2a) and expression (Experiment 2b) of conditioned hyperactivity and long-term sensitization in male, Swiss-Webster mice. Mice experienced 3 weeks of wheel running (exercise) or not (sedentary) either beginning prior to (Experiments 1 and 2a), or immediately following (Experiment 2b), the acquisition phase. During the acquisition phase, mice (n = 12-15/group) received injections (subcutaneous) of either vehicle (saline) or methamphetamine (0.5 or 1.0 mg/kg, Experiment 1; 1.0 mg/kg, Experiments 2a and 2b) immediately prior to 5 locomotor-activity sessions. The extinction phase began 48 hours (h) (Experiment 1) or 3 weeks (Experiments 2a and 2b) after acquisition and all mice received vehicle injections prior to 4 locomotor-activity sessions. Tests of long-term sensitization occurred 72 h after the last extinction session and involved an escalating, methamphetamine-dose regimen (0.25 ➔ 1.0 mg/kg), 1 dose/session for 3 sessions. While pre-acquisition wheel running failed to alter development of conditioned hyperactivity after training with the 0.5 mg/kg methamphetamine dose, it blunted the development of conditioned hyperactivity, and blocked (Experiment 1) or attenuated (Experiment 2a) induction of long-term sensitization after training with the 1.0 mg/kg methamphetamine dose. Furthermore, while post-acquisition wheel running retarded extinction of conditioned hyperactivity, it did not alter expression of conditioned hyperactivity or long-term sensitization (Experiment 2b). Collectively, the results suggest that the impact of voluntary exercise on context-drug associations and long-term sensitization is critically dependent on the timing of exercise relative to drug conditioning.
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Affiliation(s)
- Anthony S Rauhut
- Department of Psychology, Dickinson College, Carlisle, PA, USA; Neuroscience Program, Dickinson College, Carlisle, PA, USA.
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Sampedro-Piquero P, J. Santín L, Castilla-Ortega E. Aberrant Brain Neuroplasticity and Function in Drug Addiction: A Focus on Learning-Related Brain Regions. Behav Neurosci 2019. [DOI: 10.5772/intechopen.85280] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Cofresí RU, Bartholow BD, Piasecki TM. Evidence for incentive salience sensitization as a pathway to alcohol use disorder. Neurosci Biobehav Rev 2019; 107:897-926. [PMID: 31672617 PMCID: PMC6878895 DOI: 10.1016/j.neubiorev.2019.10.009] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 10/14/2019] [Accepted: 10/15/2019] [Indexed: 12/12/2022]
Abstract
The incentive salience sensitization (ISS) theory of addiction holds that addictive behavior stems from the ability of drugs to progressively sensitize the brain circuitry that mediates attribution of incentive salience (IS) to reward-predictive cues and its behavioral manifestations. In this article, we establish the plausibility of ISS as an etiological pathway to alcohol use disorder (AUD). We provide a comprehensive and critical review of evidence for: (1) the ability of alcohol to sensitize the brain circuitry of IS attribution and expression; and (2) attribution of IS to alcohol-predictive cues and its sensitization in humans and non-human animals. We point out gaps in the literature and how these might be addressed. We also highlight how individuals with different alcohol subjective response phenotypes may differ in susceptibility to ISS as a pathway to AUD. Finally, we discuss important implications of this neuropsychological mechanism in AUD for psychological and pharmacological interventions attempting to attenuate alcohol craving and cue reactivity.
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Affiliation(s)
- Roberto U Cofresí
- University of Missouri, Department of Psychological Sciences, Columbia, MO 65211, United States.
| | - Bruce D Bartholow
- University of Missouri, Department of Psychological Sciences, Columbia, MO 65211, United States
| | - Thomas M Piasecki
- University of Missouri, Department of Psychological Sciences, Columbia, MO 65211, United States
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15
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Ethanol-induced changes in synaptic amino acid neurotransmitter levels in the nucleus accumbens of differentially sensitized mice. Psychopharmacology (Berl) 2019; 236:3541-3556. [PMID: 31302721 DOI: 10.1007/s00213-019-05324-x] [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] [Received: 01/02/2019] [Accepted: 07/02/2019] [Indexed: 01/21/2023]
Abstract
RATIONALE Ethanol-induced behavioural sensitization (EBS) does not occur uniformly in mice exposed to the sensitization paradigm. This suggests innate differential responses to ethanol (EtOH) in the reward circuitry of individual animals. OBJECTIVES To better characterize the adaptive differences between low-sensitized (LS) and high-sensitized (HS) mice, we examined excitatory amino acid (EAA) and inhibitory amino acid (IAA) neurotransmitter levels in the nucleus accumbens (NAc) during EBS expression. METHODS Male DBA/2J mice received five ethanol (EtOH) (2.2 g/kg) or saline injections, and locomotor activity (LMA) was assessed during EBS induction. EtOH mice were classified as LS or HS on the basis of final LMA scores. Following an EtOH challenge (1.8 g/kg) 2 weeks later, LMA was re-evaluated and in vivo microdialysis samples were collected from the NAc. RESULTS Most differences in amino acid levels were observed within the first 20 min after EtOH challenge. LS mice exhibited similar glutamate levels compared with acutely treated (previously EtOH naïve) mice, and generally increased levels of the IAAs GABA, glycine, and taurine. By contrast, HS mice exhibited increased glutamate and attenuated levels of GABA, glycine, and taurine. CONCLUSION These data suggest that the profile of amino acid neurotransmitters in the NAc of LS and HS mice significantly differs. Elucidating these adaptive differences contributes to our understanding of factors that confer susceptibility/resilience to alcohol use disorder.
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16
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Snorrason I, Ricketts EJ, Olafsson RP, Rozenman M, Colwell CS, Piacentini J. Disentangling Reward Processing in Trichotillomania: 'Wanting' and 'Liking' Hair Pulling Have Distinct Clinical Correlates. JOURNAL OF PSYCHOPATHOLOGY AND BEHAVIORAL ASSESSMENT 2019; 41:271-279. [PMID: 32051656 PMCID: PMC7015260 DOI: 10.1007/s10862-018-9712-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Trichotillomania (TTM; hair-pulling disorder) is characterized by an irresistible urge or desire to pull out one's own hair, and a sense of pleasure when hair is pulled out. Evidence from translational neuroscience has shown that 'wanting' (motivation to seek a reward) and 'liking' (enjoyment when reward is received) are each mediated by overlapping but distinct neural circuitry, and that 'wanting' contributes to addictive/compulsive behaviors more so than 'liking'. In the present study, we developed the Hair Pulling Reward Scale (HPRS), a self-report measure that consists of two subscales designed to assess (a) cue-triggered urges and appetitive motivation to pull hair (i.e., putative correlates of 'wanting'), and (b) momentary pleasure and gratification during pulling episodes (i.e., putative correlates of 'liking'). We administered the HPRS to 259 individuals with TTM and examined its psychometric properties. Confirmatory factor analysis supported a two-factor model reflecting correlated Wanting and Liking scales. Consistent with predictions, Wanting, much more than Liking, had robust correlations with TTM severity, impulsiveness, difficulties in emotion regulation, psychiatric symptoms, and sleep dysfunction. The results suggest that the HPRS is a psychometrically sound instrument that can be used as a symptom-level measure of reward processing in TTM.
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Affiliation(s)
- Ivar Snorrason
- Division of Clinical Therapeutics, New York State Psychiatric Institute, New York, NY, USA
- Department of Psychiatry, Columbia University Medical Center, New York, NY, USA
- Present address: Behavioral Health Partial Program, McLean Hospital, Belmont, MA, USA
- Present address: Department of Psychiatry, HarvardMedical School, Boston, MA, USA
| | - Emily J. Ricketts
- Division of Child and Adolescent Psychiatry, University of California, Los Angeles, Los Angeles, CA, USA
| | | | - Michelle Rozenman
- Division of Child and Adolescent Psychiatry, University of California, Los Angeles, Los Angeles, CA, USA
| | - Christopher S. Colwell
- Division of Child and Adolescent Psychiatry, University of California, Los Angeles, Los Angeles, CA, USA
| | - John Piacentini
- Division of Child and Adolescent Psychiatry, University of California, Los Angeles, Los Angeles, CA, USA
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17
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Hellberg SN, Russell TI, Robinson MJF. Cued for risk: Evidence for an incentive sensitization framework to explain the interplay between stress and anxiety, substance abuse, and reward uncertainty in disordered gambling behavior. COGNITIVE, AFFECTIVE & BEHAVIORAL NEUROSCIENCE 2019; 19:737-758. [PMID: 30357661 PMCID: PMC6482104 DOI: 10.3758/s13415-018-00662-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Gambling disorder is an impairing condition confounded by psychiatric co-morbidity, particularly with substance use and anxiety disorders. Yet, our knowledge of the mechanisms that cause these disorders to coalesce remains limited. The Incentive Sensitization Theory suggests that sensitization of neural "wanting" pathways, which attribute incentive salience to rewards and their cues, is responsible for the excessive desire for drugs and cue-triggered craving. The resulting hyper-reactivity of the "wanting' system is believed to heavily influence compulsive drug use and relapse. Notably, evidence for sensitization of the mesolimbic dopamine pathway has been seen across gambling and substance use, as well as anxiety and stress-related pathology, with stress playing a major role in relapse. Together, this evidence highlights a phenomenon known as cross-sensitization, whereby sensitization to stress, drugs, or gambling behaviors enhance the sensitivity and dopaminergic response to any of those stimuli. Here, we review the literature on how cue attraction and reward uncertainty may underlie gambling pathology, and examine how this framework may advance our understanding of co-mordidity with substance-use disorders (e.g., alcohol, nicotine) and anxiety disorders. We argue that reward uncertainty, as seen in slot machines and games of chance, increases dopaminergic activity in the mesolimbic pathway and enhances the incentive value of reward cues. We propose that incentive sensitization by reward uncertainty may interact with and predispose individuals to drug abuse and stress, creating a mechanism through which co-mordidity of these disorders may emerge.
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Affiliation(s)
- Samantha N Hellberg
- Psychology Department and the Neuroscience and Behavior Program, Wesleyan University, 207 High Street, Middletown, CT, 06457, USA
- University of North Carolina Chapel Hill, Chapel Hill, NC, USA
| | - Trinity I Russell
- Psychology Department and the Neuroscience and Behavior Program, Wesleyan University, 207 High Street, Middletown, CT, 06457, USA
- National Institutes on Drug Abuse, Baltimore, MD, USA
| | - Mike J F Robinson
- Psychology Department and the Neuroscience and Behavior Program, Wesleyan University, 207 High Street, Middletown, CT, 06457, USA.
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18
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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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Vella SL, Pai N. A theoretical review of psychological resilience: Defining resilience and resilience research over the decades. ARCHIVES OF MEDICINE AND HEALTH SCIENCES 2019. [DOI: 10.4103/amhs.amhs_119_19] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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20
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Nona CN, Hendershot CS, Lê AD. Behavioural sensitization to alcohol: Bridging the gap between preclinical research and human models. Pharmacol Biochem Behav 2018; 173:15-26. [DOI: 10.1016/j.pbb.2018.08.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 07/31/2018] [Accepted: 08/07/2018] [Indexed: 12/28/2022]
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21
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Becker JB, McClellan ML, Reed BG. Sex differences, gender and addiction. J Neurosci Res 2017; 95:136-147. [PMID: 27870394 DOI: 10.1002/jnr.23963] [Citation(s) in RCA: 326] [Impact Index Per Article: 46.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 09/17/2016] [Accepted: 09/19/2016] [Indexed: 12/13/2022]
Abstract
This review discusses alcohol and other forms of drug addiction as both a sociocultural and biological phenomenon. Sex differences and gender are not solely determined by biology, nor are they entirely sociocultural. The interactions among biological, environmental, sociocultural, and developmental influences result in phenotypes that may be more masculine or more feminine. These gender-related sex differences in the brain can influence the responses to drugs of abuse, progressive changes in the brain after exposure to drugs of abuse and whether addiction results from drug-taking experiences. In addition, the basic laboratory evidence for sex differences is discussed within the context of four types of sex/gender differences. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Jill B Becker
- Department of Psychology and the Molecular and Behavioral Neuroscience Institute, University of Michigan, Ann Arbor, MI, 48109
| | - Michele L McClellan
- Department of History and the Residential College, University of Michigan, Ann Arbor, MI, 48109
| | - Beth Glover Reed
- School of Social Work and the Department of Women's Studies, University of Michigan, Ann Arbor, MI, 48109
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22
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Nona CN, Nobrega JN. A role for nucleus accumbens glutamate in the expression but not the induction of behavioural sensitization to ethanol. Behav Brain Res 2017; 336:269-281. [PMID: 28919158 DOI: 10.1016/j.bbr.2017.09.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 08/23/2017] [Accepted: 09/13/2017] [Indexed: 12/27/2022]
Abstract
Mechanisms underlying differential sensitivity to behavioural sensitization to ethanol (EtOH) remain poorly understood, although accumulating evidence suggests a role for glutamatergic processes in the ventral striatum. Efforts to address this issue can benefit from the well-documented fact that in any given cohort, some of the mice (High sensitized; HS) show robust sensitization, while others (Low sensitized; LS) show little, if any, sensitization. Here, we examined whether this variability might be differentially associated with nucleus accumbens (NAc) glutamate processes. Male DBA mice received 5 EtOH (2.2g/kg) or saline injections twice a week and were challenged with EtOH (1.8g/kg) 2 weeks after injection 5. When an EtOH challenge was administered 2 weeks following the induction of sensitization, HS, but not LS, mice showed a robust increase in glutamate levels (67%, P<0.01) as measured by in vivo microdialysis. In a separate cohort, the mGlu2/3 agonist LY354740 (10mg/kg), given prior to the EtOH challenge, abolished the expression of sensitization. To ascertain whether enhanced release could also be observed during the induction of sensitization, glutamate levels were measured after the 1st and 5th EtOH injection and were found to be unchanged in HS mice, although briefly elevated in LS mice at injection 5. To further assess possible glutamate involvement during the induction of sensitization, sensitizing EtOH injections were co-administered with NMDAR antagonists. At the doses used, MK-801 (0.25mg/kg) and CGS 19755 (10mg/kg) blocked the expression of sensitization, but did not significantly interfere with the development of EtOH sensitization. Within the limitations of the present design, the results suggest an important role for EtOH-induced glutamate release in the NAc when sensitization is well established, but not necessarily during the development of sensitization.
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Affiliation(s)
- Christina N Nona
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada; Behavioural Neurobiology Laboratory, Research Imaging Centre, Centre for Addiction and Mental Health, Toronto, ON, Canada.
| | - José N Nobrega
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada; Behavioural Neurobiology Laboratory, Research Imaging Centre, Centre for Addiction and Mental Health, Toronto, ON, Canada; Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada; Departments of Psychiatry and Psychology, University of Toronto, Toronto, ON, Canada
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23
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Polk SE, Schulte EM, Furman CR, Gearhardt AN. Wanting and liking: Separable components in problematic eating behavior? Appetite 2017; 115:45-53. [PMID: 27840087 PMCID: PMC5796412 DOI: 10.1016/j.appet.2016.11.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2016] [Revised: 10/11/2016] [Accepted: 11/09/2016] [Indexed: 12/21/2022]
Abstract
Some individuals may have an addictive-like response to certain foods, possibly contributing to problematic eating. Highly processed foods, with added fats and/or refined carbohydrates, are suggested to be most associated with addictive-like eating. The incentive sensitization theory suggests that wanting (e.g. craving) may drive compulsive drug use rather than liking (e.g. enjoyment), but it is unknown whether highly processed foods elicit similar wanting and liking patterns as drugs of abuse, or whether individual differences exist. The current study examines the association of highly processed foods with craving and liking, and whether these relationships differ by food addiction symptomology, cognitive restraint, or body mass index (BMI). Participants (n = 216) reported craving and liking for 35 foods and completed the Yale Food Addiction Scale (YFAS) and Three Factor Eating Questionnaire (TFEQ). Highly processed foods were craved more overall. Craving of highly processed foods was predicted negatively by restraint and positively by YFAS score. Liking of highly processed foods was predicted negatively by restraint and positively by BMI. In conclusion, craving and liking appear distinct with respect to highly processed foods, and may be influenced by addictive-like eating, cognitive restraint, and BMI. This suggests that the incentive sensitization framework may also be relevant for problematic food consumption, especially for individuals reporting food addiction symptoms.
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Affiliation(s)
- Sarah E Polk
- University of Michigan, 530 Church St., Ann Arbor, MI 48103, USA
| | - Erica M Schulte
- University of Michigan, 530 Church St., Ann Arbor, MI 48103, USA
| | - Celina R Furman
- University of Michigan, 530 Church St., Ann Arbor, MI 48103, USA
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24
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Arulkadacham LJ, Richardson B, Staiger PK, Kambouropoulos N, O'Donnell RL, Ling M. Dissociation between wanting and liking for alcohol and caffeine: A test of the Incentive Sensitisation Theory. J Psychopharmacol 2017. [PMID: 28627332 DOI: 10.1177/0269881117711711] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Limited human studies have directly tested the dissociation between wanting and liking with human substance users, a core tenet of the Incentive Sensitisation Theory (IST). The aim of this study is to test the dissociation between wanting and liking in humans across two commonly used licit substances, alcohol and caffeine. The STRAP-R (Sensitivity To Reinforcement of Addictive and other Primary Rewards) questionnaire was administered to 285 alcohol users (mean age=33.30, SD= 8.83) and 134 coffee users (mean age=33.05, SD=8.10) ranging in their levels of substance use to assess wanting and liking. Findings showed that in high risk alcohol users wanting may drive alcohol consumption more so than liking, compared with low risk alcohol users. However, wanting and liking did not significantly dissociate as alcohol consumption increased. These findings partially support IST. Additionally, IST was not supported in coffee users. It is possible that caffeine functions differently at the neurological level compared with alcohol, perhaps explaining the lack of dissociation emerging in coffee users as caffeine use increased. Nevertheless, the current study makes several contributions to IST research. Future studies should focus on utilising the STRAP-R with a clinically dependent sample to test the dissociation between wanting and liking.
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Affiliation(s)
- Lilani J Arulkadacham
- 1 Faculty of Health, School of Psychology, Deakin University, Melbourne, VIC, Australia
| | - Ben Richardson
- 1 Faculty of Health, School of Psychology, Deakin University, Melbourne, VIC, Australia.,2 Cairnmillar Institute, School of Psychology, Counselling and Psychotherapy, Melbourne, VIC, Australia
| | - Petra K Staiger
- 1 Faculty of Health, School of Psychology, Deakin University, Melbourne, VIC, Australia
| | | | - Renée L O'Donnell
- 1 Faculty of Health, School of Psychology, Deakin University, Melbourne, VIC, Australia
| | - Mathew Ling
- 1 Faculty of Health, School of Psychology, Deakin University, Melbourne, VIC, Australia
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25
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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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26
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Taracha E, Kaniuga E, Wyszogrodzka E, Płaźnik A, Stefański R, Chrapusta SJ. Poor sensitization of 50-kHz vocalization response to amphetamine predicts rat susceptibility to self-administration of the drug. Psychopharmacology (Berl) 2016; 233:2827-40. [PMID: 27256355 PMCID: PMC4917579 DOI: 10.1007/s00213-016-4328-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 05/09/2016] [Indexed: 11/27/2022]
Abstract
RATIONALE Our previous studies showed promise for using sensitization of the frequency-modulated 50-kHz vocalization response to amphetamine (AMPH) as an index of rat vulnerability to AMPH addiction. OBJECTIVE This study aimed to test the utility of sensitizing frequency-modulated (FM) 50-kHz vocalization in the AMPH self-administration paradigm as well as the ability of N-acetylcysteine to prevent self-administration relapse. METHODS Rats were subjected to the so-called two-injection protocol of sensitization (TIPS) using AMPH and were categorized as low-sensitized callers (LCTIPS) or high-sensitized callers (HCTIPS) based on the individual outcomes. Then, they were given 44 sessions of AMPH self-administration followed by a 17-session N-acetylcysteine-aided extinction course and a single session of AMPH-primed self-administration reinstatement. RESULTS LCTIPS compared to HCTIPS rats showed no considerable difference in the FM 50-kHz vocalization rate during the self-administration training or extinction course, but they were considerably more likely to acquire AMPH self-administration and experience drug-induced reinstatement of this trait. Moreover, the LCTIPS rats were more likely than HCTIPS rats to have a markedly higher FM 50-kHz vocalization rate after AMPH reinstatement. N-acetylcysteine did not affect the course of self-administration extinction or the instrumental or FM 50-kHz vocalization responses to AMPH reinstatement. CONCLUSIONS There is no link between the FM 50-kHz vocalization and key characteristics of AMPH self-administration. Additionally, N-acetylcysteine does not help prevent AMPH self-administration relapse. However, there is a high predictive value for poor sensitization of the FM 50-kHz vocalization response to AMPH with respect to the acquisition and maintenance of self-administration of this psychostimulant.
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Affiliation(s)
- Ewa Taracha
- Department of Neurochemistry, Institute of Psychiatry and Neurology, 9 Sobieskiego St., 02-957, Warsaw, Poland.
| | - Ewelina Kaniuga
- />Department of Neurochemistry, Institute of Psychiatry and Neurology, 9 Sobieskiego St., 02-957 Warsaw, Poland
| | - Edyta Wyszogrodzka
- />Department of Pharmacology and Physiology of the Nervous System, Institute of Psychiatry and Neurology, 9 Sobieskiego St., 02-957 Warsaw, Poland
| | - Adam Płaźnik
- />Department of Neurochemistry, Institute of Psychiatry and Neurology, 9 Sobieskiego St., 02-957 Warsaw, Poland , />Department of Experimental and Clinical Pharmacology, Medical University of Warsaw, 26/28 Krakowskie Przedmieście St., 00-927 Warsaw, Poland
| | - Roman Stefański
- />Department of Pharmacology and Physiology of the Nervous System, Institute of Psychiatry and Neurology, 9 Sobieskiego St., 02-957 Warsaw, Poland
| | - Stanisław J. Chrapusta
- />Department of Experimental Pharmacology, Mossakowski Medical Research Centre, Polish Academy of Sciences, 5 Pawińskiego St., 02-106 Warsaw, Poland
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27
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Robinson MJF, Fischer AM, Ahuja A, Lesser EN, Maniates H. Roles of "Wanting" and "Liking" in Motivating Behavior: Gambling, Food, and Drug Addictions. Curr Top Behav Neurosci 2016; 27:105-136. [PMID: 26407959 DOI: 10.1007/7854_2015_387] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The motivation to seek out and consume rewards has evolutionarily been driven by the urge to fulfill physiological needs. However in a modern society dominated more by plenty than scarcity, we tend to think of motivation as fueled by the search for pleasure. Here, we argue that two separate but interconnected subcortical and unconscious processes direct motivation: "wanting" and "liking." These two psychological and neuronal processes and their related brain structures typically work together, but can become dissociated, particularly in cases of addiction. In drug addiction, for example, repeated consumption of addictive drugs sensitizes the mesolimbic dopamine system, the primary component of the "wanting" system, resulting in excessive "wanting" for drugs and their cues. This sensitizing process is long-lasting and occurs independently of the "liking" system, which typically remains unchanged or may develop a blunted pleasure response to the drug. The result is excessive drug-taking despite minimal pleasure and intense cue-triggered craving that may promote relapse long after detoxification. Here, we describe the roles of "liking" and "wanting" in general motivation and review recent evidence for a dissociation of "liking" and "wanting" in drug addiction, known as the incentive sensitization theory (Robinson and Berridge 1993). We also make the case that sensitization of the "wanting" system and the resulting dissociation of "liking" and "wanting" occurs in both gambling disorder and food addiction.
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Affiliation(s)
- M J F Robinson
- Department of Psychology, Wesleyan University, 207 High Street, Judd Hall, Middletown, CT, 06459, USA.
| | - A M Fischer
- Department of Psychology, Wesleyan University, 207 High Street, Judd Hall, Middletown, CT, 06459, USA
| | - A Ahuja
- Department of Psychology, Wesleyan University, 207 High Street, Judd Hall, Middletown, CT, 06459, USA
| | - E N Lesser
- Department of Psychology, Wesleyan University, 207 High Street, Judd Hall, Middletown, CT, 06459, USA
| | - H Maniates
- Department of Psychology, Wesleyan University, 207 High Street, Judd Hall, Middletown, CT, 06459, USA
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Burhans LB, Smith-Bell CA, Schreurs BG. Effects of extinction treatments on the reduction of conditioned responding and conditioned hyperarousal in a rabbit model of posttraumatic stress disorder (PTSD). Behav Neurosci 2015; 129:611-20. [PMID: 26348715 PMCID: PMC4667790 DOI: 10.1037/bne0000092] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We have previously characterized a model of posttraumatic stress disorder (PTSD), based on classical conditioning of the rabbit nictitating membrane response (NMR), that focuses on 2 key PTSD-like features: conditioned responses to trauma-associated cues and hyperarousal. In addition to the development of conditioned NMRs (CRs) to a tone conditioned stimulus (CS) associated with a periorbital shock unconditioned stimulus (US), we have observed that rabbits also exhibit a conditioning-specific reflex modification (CRM) of the NMR that manifests as an exaggerated and more complex reflexive NMR to presentations of the US by itself, particularly to intensities that elicited little response prior to conditioning. Previous work has demonstrated that unpaired presentations of the CS and US are successful at extinguishing CRs and CRM simultaneously, even when a significantly weakened version of the US is utilized. In the current study, additional extinction treatments were tested, including continued pairings of the CS with a weakened US and exposure to the training context alone, and these treatments were contrasted with the effects of unpaired extinction with a weakened US and remaining in home cages with no further treatment. Results showed that continued pairings only slightly decreased CRs and CRM, while context exposure had no effect on CRs and marginal effects on reducing CRM. Unpaired extinction was still the most effective treatment for reducing both. Findings are discussed in terms of applications to cognitive-behavioral therapies for treatment of PTSD, such as incorporating mild, innately stressful stimuli into virtual reality therapy.
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Affiliation(s)
- Lauren B Burhans
- Blanchette Rockefeller Neurosciences Institute, West Virginia University
| | | | - Bernard G Schreurs
- Blanchette Rockefeller Neurosciences Institute, West Virginia University
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Implicit measures of "wanting" and "liking" in humans. Neurosci Biobehav Rev 2015; 57:350-64. [PMID: 26432503 DOI: 10.1016/j.neubiorev.2015.09.015] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 09/19/2015] [Accepted: 09/27/2015] [Indexed: 11/22/2022]
Abstract
Incentive Sensitization Theory (IST; e.g., Robinson and Berridge, 1993. Brain Res. Rev., 18, 291; Robinson and Berridge, 2003 Trends Neurosci., 26, 507) suggests that a common dopamine system that deals with incentive salience attribution is affected by different types of drugs. Repeated drug use will sensitize this neural system, which means that drugs increasingly trigger the experience of incentive salience or "wanting". Importantly, Robinson and Berridge stress that there is a dissociation between drug "wanting" (the unconscious attribution of incentive salience) and drug "liking" (the unconscious hedonic experience when one consumes drugs). Whereas the former plays an essential role in the development and maintenance of drug addiction, the latter does not. Although this model was based mainly on research with non-human animals, more recently the dissociation between "wanting" and "liking" has been examined in humans as well. A widely used and promising means of studying these processes are behavioral implicit measures such as the Implicit Association Test (IAT), the Approach-Avoidance Task (AAT), different types of Stimulus-Response Compatibility (SRC) tasks, and Affective Simon Tasks (AST). IST makes the clear prediction that (1) there should be a positive correlation between indices of "wanting" (e.g., drug consumption) and implicit "wanting" scores. Similarly, there should be a positive correlation between indices of "liking" (e.g., various expressions of subjective pleasure) and implicit "liking" scores; (2) there should be higher "wanting" scores in substance abusers or frequent substance users compared to non-users or infrequent users, and there should be no differences in "liking" between these groups (or even less "liking" in frequent substance users); (3) manipulations of "wanting" should affect implicit "wanting" scores whereas manipulations of "liking" should affect implicit "liking" scores. However, studies that tested these hypotheses did not produce equivocal results. To shed light on these discrepancies, we first discuss the different definitions of "wanting" and "liking" and the different tests that have been used to assess these processes. Then, we discuss whether it is reasonable to assume that these tests are valid measures of "wanting" and "liking" and we review correlational, quasi-experimental, and experimental studies that inform us about this issue. Finally, we discuss the future potential of implicit measures in research on IST and make several recommendations to improve both theory and methodology.
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Influence of sensitization on the discriminative stimulus effects of methylphenidate in mice. Behav Pharmacol 2015; 25:766-74. [PMID: 25325285 DOI: 10.1097/fbp.0000000000000095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Methylphenidate (MPH) remains an important therapy for attention-deficit hyperactivity disorder, but aspects of its pharmacology remain unclear. In the present study, we used a regimen of MPH (8 mg/kg daily×14 days) in C57BL/6J mice to determine whether establishing locomotor sensitization to MPH influenced the acquisition and the dose-response function of MPH in a classic drug discrimination procedure. MPH-sensitized mice (SENS group) showed enhanced locomotor activity to the 8 mg/kg exposure dose as well as a 2 mg/kg dose before discrimination training. However, the SENS mice did not acquire discrimination of either a low dose (2 mg/kg) or a higher dose (4 mg/kg) of MPH any more rapidly than the CTRL mice. Further, during generalization testing, the dose-response functions for the SENS and CTRL mice were identical. Therefore, we did not find that previous exposure to MPH, which produced a sensitized locomotor response, facilitated MPH discrimination.
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Wright KN, Hollis F, Duclot F, Dossat AM, Strong CE, Francis TC, Mercer R, Feng J, Dietz DM, Lobo MK, Nestler EJ, Kabbaj M. Methyl supplementation attenuates cocaine-seeking behaviors and cocaine-induced c-Fos activation in a DNA methylation-dependent manner. J Neurosci 2015; 35:8948-58. [PMID: 26063926 PMCID: PMC4461693 DOI: 10.1523/jneurosci.5227-14.2015] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 05/06/2015] [Accepted: 05/07/2015] [Indexed: 12/14/2022] Open
Abstract
Epigenetic mechanisms, such as histone modifications, regulate responsiveness to drugs of abuse, such as cocaine, but relatively little is known about the regulation of addictive-like behaviors by DNA methylation. To investigate the influence of DNA methylation on the locomotor-activating effects of cocaine and on drug-seeking behavior, rats receiving methyl supplementation via chronic l-methionine (MET) underwent either a sensitization regimen of intermittent cocaine injections or intravenous self-administration of cocaine, followed by cue-induced and drug-primed reinstatement. MET blocked sensitization to the locomotor-activating effects of cocaine and attenuated drug-primed reinstatement, with no effect on cue-induced reinstatement or sucrose self-administration and reinstatement. Furthermore, upregulation of DNA methyltransferase 3a and 3b and global DNA hypomethylation were observed in the nucleus accumbens core (NAc), but not in the medial prefrontal cortex (mPFC), of cocaine-pretreated rats. Glutamatergic projections from the mPFC to the NAc are critically involved in the regulation of cocaine-primed reinstatement, and activation of both brain regions is seen in human addicts when reexposed to the drug. When compared with vehicle-pretreated rats, the immediate early gene c-Fos (a marker of neuronal activation) was upregulated in the NAc and mPFC of cocaine-pretreated rats after cocaine-primed reinstatement, and chronic MET treatment blocked its induction in both regions. Cocaine-induced c-Fos expression in the NAc was associated with reduced methylation at CpG dinucleotides in the c-Fos gene promoter, effects reversed by MET treatment. Overall, these data suggest that drug-seeking behaviors are, in part, attributable to a DNA methylation-dependent process, likely occurring at specific gene loci (e.g., c-Fos) in the reward pathway.
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Affiliation(s)
- Katherine N Wright
- Program in Neuroscience, Department of Biomedical Sciences, Florida State University, Tallahassee, Florida 32306
| | - Fiona Hollis
- Program in Neuroscience, Department of Biomedical Sciences, Florida State University, Tallahassee, Florida 32306, Federal Polytechnic School of Lausanne, CH-1015 Lausanne, Switzerland
| | - Florian Duclot
- Program in Neuroscience, Department of Biomedical Sciences, Florida State University, Tallahassee, Florida 32306
| | - Amanda M Dossat
- Program in Neuroscience, Department of Biomedical Sciences, Florida State University, Tallahassee, Florida 32306
| | - Caroline E Strong
- Program in Neuroscience, Department of Biomedical Sciences, Florida State University, Tallahassee, Florida 32306
| | - T Chase Francis
- Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, Maryland 21201
| | - Roger Mercer
- Program in Neuroscience, Department of Biomedical Sciences, Florida State University, Tallahassee, Florida 32306
| | - Jian Feng
- Fishberg Department of Neuroscience and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, and
| | - David M Dietz
- Department of Pharmacology and Toxicology, University at Buffalo, Buffalo, New York 14214
| | - Mary Kay Lobo
- Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, Maryland 21201
| | - Eric J Nestler
- Fishberg Department of Neuroscience and Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, New York 10029, and
| | - Mohamed Kabbaj
- Program in Neuroscience, Department of Biomedical Sciences, Florida State University, Tallahassee, Florida 32306,
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D'Amour-Horvat V, Leyton M. Impulsive actions and choices in laboratory animals and humans: effects of high vs. low dopamine states produced by systemic treatments given to neurologically intact subjects. Front Behav Neurosci 2014; 8:432. [PMID: 25566001 PMCID: PMC4274964 DOI: 10.3389/fnbeh.2014.00432] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 11/26/2014] [Indexed: 11/13/2022] Open
Abstract
Increases and decreases in dopamine (DA) transmission have both been suggested to influence reward-related impulse-control. The present literature review suggests that, in laboratory animals, the systemic administration of DA augmenters preferentially increases susceptibility to premature responding; with continued DA transmission, reward approach behaviors are sustained. Decreases in DA transmission, in comparison, diminish the appeal of distal and difficult to obtain rewards, thereby increasing susceptibility to temporal discounting and other forms of impulsive choice. The evidence available in humans is not incompatible with this model but is less extensive.
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Affiliation(s)
| | - Marco Leyton
- Department of Psychology, McGill University Montreal, QC, Canada ; Department of Psychiatry, McGill University Montreal, QC, Canada ; Center for Studies in Behavioral Neurobiology, Concordia University Montreal, QC, Canada
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Tran S, Gerlai R. Recent advances with a novel model organism: alcohol tolerance and sensitization in zebrafish (Danio rerio). Prog Neuropsychopharmacol Biol Psychiatry 2014; 55:87-93. [PMID: 24593943 PMCID: PMC4225077 DOI: 10.1016/j.pnpbp.2014.02.008] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2014] [Revised: 02/06/2014] [Accepted: 02/06/2014] [Indexed: 11/18/2022]
Abstract
Alcohol abuse and dependence are a rapidly growing problem with few treatment options available. The zebrafish has become a popular animal model for behavioral neuroscience. This species may be appropriate for investigating the effects of alcohol on the vertebrate brain. In the current review, we examine the literature by discussing how alcohol alters behavior in zebrafish and how it may affect biological correlates. We focus on two phenomena that are often examined in the context of alcohol-induced neuroplasticity. Alcohol tolerance (a progressive decrease in the effect of alcohol over time) is often observed following continuous (chronic) exposure to low concentrations of alcohol. Alcohol sensitization also called reverse tolerance (a progressive increase in the effect of alcohol over time) is often observed following repeated discrete exposures to higher concentrations of alcohol. These two phenomena may underlie the development and maintenance of alcohol addiction. The phenotypical characterization of these responses in zebrafish may be the first important steps in establishing this species as a tool for the analysis of the molecular and neurobiological mechanisms underlying human alcohol addiction.
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Affiliation(s)
- Steven Tran
- University of Toronto, Department of Cell and Systems Biology, Canada
| | - Robert Gerlai
- University of Toronto, Department of Cell and Systems Biology, Canada; University of Toronto at Mississauga, Department of Psychology, Canada.
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The mammalian target of rapamycin pathway in the basolateral amygdala is critical for nicotine-induced behavioural sensitization. Int J Neuropsychopharmacol 2014; 17:1881-94. [PMID: 24916432 DOI: 10.1017/s1461145714000650] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Repeated exposure to nicotine increases psychomotor activity. Long-lasting neural plasticity changes that contribute to the nicotine-induced development of locomotor sensitization have been identified. The mammalian target of rapamycin complex 1 (mTORC1) signalling pathway is involved in regulating the neuroplasticity of the central nervous system. In this study, we examined the role of mTORC1 in the amygdala in nicotine-induced locomotor sensitization. Rapamycin, an inhibitor of mTORC1, was infused into the basolateral amygdala (BLA) and central amygdala (CeA) or systemically administered to investigate the role of the mTORC1 in the development and expression of nicotine-induced locomotor sensitization. We found that locomotor activity progressively increased during the initiation of nicotine-induced locomotor sensitization and the expression of nicotine sensitization was induced by nicotine challenge injection (0.35 mg/kg s.c.) after five days of withdrawal. The initiation of nicotine-induced locomotor sensitization was accompanied by the increased phosphorylated level of mTORC1 downstream target proteins including p-p70s6k and p-4EBP in the BLA, but not CeA. Intra-BLA infusion or systemic administration of rapamycin blocked locomotor activity. Increased p-p70s6k and p-4EBP were also observed in the expression of nicotine sensitization, which was demonstrated to be inhibited by systemic rapamycin administration. Our findings indicated that mTORC1 activity in the BLA, but not the CeA, mediated the initiation and expression of nicotine-induced locomotor sensitization, and may become a potential target for the treatment of nicotine addiction.
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Abstract
Social isolation has been recognized as a major risk factor for morbidity and mortality in humans for more than a quarter century. The brain is the key organ of social connections and processes, however, and the same objective social relationship can be experienced as caring and protective or as exploitive and isolating. We review evidence that the perception of social isolation (i.e., loneliness) impacts brain and behavior and is a risk factor for broad-based morbidity and mortality. However, the causal role of loneliness on neural mechanisms and mortality is difficult to test conclusively in humans. Mechanistic animal studies provide a lens through which to evaluate the neurological effects of a member of a social species living chronically on the social perimeter. Experimental studies show that social isolation produces significant changes in brain structures and processes in adult social animals. These effects are not uniform across the brain or across species but instead are most evident in brain regions that reflect differences in the functional demands of solitary versus social living for a particular species. The human and animal literatures have developed independently, however, and significant gaps also exist. The current review underscores the importance of integrating human and animal research to delineate the mechanisms through which social relationships impact the brain, health, and well-being.
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Affiliation(s)
- Stephanie Cacioppo
- High Performance Electrical NeuroImaging (HPEN) Laboratory of the Center for Cognitive and Social Neuroscience, and Department of Psychiatry and Behavioral Neuroscience, University of Chicago
| | - John P Capitanio
- California National Primate Research Center and Department of Psychology, University of California-Davis
| | - John T Cacioppo
- High Performance Electrical NeuroImaging (HPEN) Laboratory of the Center for Cognitive and Social Neuroscience, and Department of Psychiatry and Behavioral Neuroscience, University of Chicago
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Watson BJ, Taylor LG, Reid AG, Wilson SJ, Stokes PR, Brooks DJ, Myers JF, Turkheimer FE, Nutt DJ, Lingford‐Hughes AR. Investigating expectation and reward in human opioid addiction with [(11) C]raclopride PET. Addict Biol 2014; 19:1032-40. [PMID: 23829344 PMCID: PMC4282066 DOI: 10.1111/adb.12073] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The rewarding properties of some abused drugs are thought to reside in their ability to increase striatal dopamine levels. Similar increases have been shown in response to expectation of a positive drug effect. The actions of opioid drugs on striatal dopamine release are less well characterized. We examined whether heroin and the expectation of heroin reward increases striatal dopamine levels in human opioid addiction. Ten opioid-dependent participants maintained on either methadone or buprenorphine underwent [11C]raclopride positron emission tomography imaging. Opioid-dependent participants were scanned three times, receiving reward from 50-mg intravenous heroin (diamorphine; pharmaceutical heroin) during the first scan to generate expectation of the same reward at the second scan, during which they only received 0.1-mg intravenous heroin. There was no heroin injection during the third scan. Intravenous 50-mg heroin during the first scan induced pronounced effects leading to high levels of expectation at the second scan. There was no detectable increase in striatal dopamine levels to either heroin reward or expectation of reward. We believe this is the first human study to examine whether expectation of heroin reward increases striatal dopamine levels in opioid addiction. The absence of detectable increased dopamine levels to both the expectation and delivery of a heroin-related reward may have been due to the impact of substitute medication. It does however contrast with the changes seen in abstinent stimulant users, suggesting that striatal dopamine release alone may not play such a pivotal role in opioid-maintained individuals.
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Affiliation(s)
- Ben J. Watson
- Psychopharmacology Unit University of Bristol Bristol UK
| | | | | | - Sue J. Wilson
- Imperial College London Centre for Neuropsychopharmacology London UK
| | - Paul R. Stokes
- Imperial College London Centre for Neuropsychopharmacology London UK
| | - David J. Brooks
- Department of Medicine, Division of Brain Sciences Imperial College London London UK
| | - James F. Myers
- Psychopharmacology Unit University of Bristol Bristol UK
| | | | - David J. Nutt
- Imperial College London Centre for Neuropsychopharmacology London UK
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Affiliation(s)
- Marco Leyton
- Correspondence to: M. Leyton, Department of Psychiatry, McGill University, 1033 Pine Ave. W, Montréal QC H3A 1A1;
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Casey KF, Benkelfat C, Cherkasova MV, Baker GB, Dagher A, Leyton M. Reduced dopamine response to amphetamine in subjects at ultra-high risk for addiction. Biol Psychiatry 2014; 76:23-30. [PMID: 24138922 DOI: 10.1016/j.biopsych.2013.08.033] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Revised: 08/06/2013] [Accepted: 08/29/2013] [Indexed: 11/24/2022]
Abstract
BACKGROUND Not everyone who tries addictive drugs develops a substance use disorder. One of the best predictors of risk is a family history (FH) of substance use problems. In part, this might reflect perturbed mesolimbic dopamine responses. METHODS We measured amphetamine-induced changes in [(11)C]raclopride binding in 1) high-risk young adults with a multigenerational FH of substance use disorders (n = 16); 2) stimulant drug-naïve healthy control subjects with no known risk factors for addiction (n = 17); and 3) subjects matched to the high-risk group on personal drug use but without a FH of substance use problems (n = 15). RESULTS Compared with either control group, the high-risk young adults with a multigenerational FH of substance use disorders exhibited smaller [(11)C]raclopride responses, particularly within the right ventral striatum. Past drug use predicted the dopamine response also, but including it as a covariate increased the group differences. CONCLUSIONS Together, the results suggest that young people at familial high risk for substance use disorders have decreased dopamine responses to an amphetamine challenge, an effect that predates the onset of addiction.
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Affiliation(s)
- Kevin F Casey
- Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec
| | - Chawki Benkelfat
- Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec; Department of Psychiatry, McGill University, Montreal, Quebec
| | | | - Glen B Baker
- Department of Psychiatry, University of Alberta, Edmonton, Alberta
| | - Alain Dagher
- Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec
| | - Marco Leyton
- Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec; Department of Psychology, McGill University, Montreal, Quebec; Department of Psychiatry, McGill University, Montreal, Quebec; Center for Studies in Behavioral Neurobiology (ML), Concordia University, Montreal, Quebec, Canada.
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Leyton M, Vezina P. Dopamine ups and downs in vulnerability to addictions: a neurodevelopmental model. Trends Pharmacol Sci 2014; 35:268-76. [PMID: 24794705 PMCID: PMC4041845 DOI: 10.1016/j.tips.2014.04.002] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 03/17/2014] [Accepted: 04/03/2014] [Indexed: 12/11/2022]
Abstract
Addictions are commonly presaged by problems in childhood and adolescence. For many individuals this starts with the early expression of impulsive risk-taking, social gregariousness, and oppositional behaviors. Here we propose that these early diverse manifestations reflect a heightened ability of emotionally salient stimuli to activate dopamine pathways that foster behavioral approach. If substance use is initiated, these at-risk youth can also develop heightened responses to drug-paired cues. Through conditioning and drug-induced sensitization, these effects strengthen and accumulate, leading to responses that exceed those elicited by other rewards. At the same time, cues not paired with drug become associated with comparatively lower dopamine release, accentuating further the difference between drug and non-drug rewards. Together, these enhancing and inhibiting processes steer a pre-existing vulnerability toward a disproportionate concern for drugs and drug-related stimuli. Implications for prevention and treatment are discussed.
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Affiliation(s)
- Marco Leyton
- Department of Psychiatry, McGill University, Montreal, Quebec, Canada; Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada; Department of Psychology, McGill University, Montreal, Quebec, Canada; Center for Studies in Behavioral Neurobiology, Concordia University, Montreal, Quebec, Canada.
| | - Paul Vezina
- Department of Psychiatry and Behavioral Neuroscience, The University of Chicago, Chicago, IL, USA; Committee on Neurobiology, The University of Chicago, Chicago, IL, USA
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Choi FY, Ahn S, Wang YT, Phillips AG. Interference with AMPA receptor endocytosis: effects on behavioural and neurochemical correlates of amphetamine sensitization in male rats. J Psychiatry Neurosci 2014; 39:189-99. [PMID: 24290077 PMCID: PMC3997604 DOI: 10.1503/jpn.120257] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
BACKGROUND Behavioural sensitization has been linked to drug craving in both clinical and preclinical studies of addiction. Increased motor activity is accompanied by enhanced dopamine (DA) release, particularly in the nucleus accumbens (NAcc). The neural bases of sensitization are linked to alterations in synaptic connections that also underlie learning and memory. The present study uses an "interference" peptide, Tat-GluA2(3Y), that blocks long-term depression (LTD) at glutamatergic synapses by disrupting the endocytosis of α- amino-3-hydroxy-5-methylisoxazole-4-propionic acid receptors (AMPARs), to explore the role of this form of synaptic plasticity in the induction and maintenance of sensitization. METHODS Rats were given 5 injections of d-amphetamine (d-AMPH, 1.0 mg/kg, intraperitoneal) every second day. Tat-GluA2(3Y), was administered by 2 different routes (intravenously and intracerebrally to the ventral tegmental area [VTA] or to the NAcc) before each injection of d-AMPH. After a 14-day drug-free period, expression of behavioural sensitization was evoked by a challenge injection of d-AMPH (0.5 mg/kg, intraperitoneal). Dopamine efflux in the NAcc was measured by high-pressure liquid chromatography with electrochemical detection analyses of brain dialysates on days 1, 9 and 24 of the intravenous peptide experiment. RESULTS Systemic administration of Tat-GluA2(3Y) during the induction phase blocked maintenance of behavioural sensitization and attenuated the maintenance of neurochemical sensitization. Intra-VTA infusion of Tat-GluA2(3Y) before each administration of d-AMPH did not affect induction, but inhibited maintenance and subsequent expression of sensitization, whereas intra-NAcc infusion of the peptide did not affect induction or maintenance of sensitization. LIMITATIONS The relevance of behavioural sensitization in rodents is related to the development of craving and does not provide direct measures of drug reinforcement. CONCLUSION These findings confirm that drug-induced neuroplasticity is labile and may be subject to disruption at a time when long-lasting associations between drug reward and contextual stimuli are formed. Furthermore, the unique ability of Tat-GluA2(3Y) to block maintenance of behavioural sensitization implicates LTD in the consolidation of essential associative memories. Tat-GluA2(3Y) has the unique ability to disrupt functional neuroadaptations triggered by repeated psychostimulant exposure and therefore may protect against the development of craving and drug seeking behaviours.
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Affiliation(s)
| | | | | | - Anthony G. Phillips
- Correspondence to:A.G. Phillips, 2255 Wesbrook Mall, Department of Psychiatry, University of British Columbia, Vancouver BC V6T 2A1;
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White AO, Rauhut AS. Time-dependent effects of prazosin on the development of methamphetamine conditioned hyperactivity and context-specific sensitization in mice. Behav Brain Res 2014; 263:80-9. [PMID: 24487011 PMCID: PMC3985165 DOI: 10.1016/j.bbr.2014.01.032] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 01/17/2014] [Accepted: 01/21/2014] [Indexed: 01/04/2023]
Abstract
The present experiments examined the effects of prazosin, a selective α₁-adrenergic receptor antagonist, on the development of methamphetamine conditioned hyperactivity and context-specific sensitization. Mice received an injection of vehicle (distilled water) or prazosin (0.5, 1.0 or 2.0 mg/kg) 30 min prior to a second injection of vehicle (saline) or methamphetamine (1.0 mg/kg) during the conditioning sessions (Experiment 1). Following the conditioning sessions, mice were tested for conditioned hyperactivity and then tested for context-specific sensitization. In subsequent experiments, mice received an injection of vehicle (distilled water) or prazosin (2.0 mg/kg) immediately (Experiment 2) or 24 h (Experiment 3) after the conditioning sessions and then tested for conditioned hyperactivity and context-specific sensitization. Prazosin dose-dependently blocked the development of methamphetamine conditioned hyperactivity and context-specific sensitization when administered prior to the methamphetamine during the conditioning phase; however nonspecific motor impairments also were observed (Experiment 1). Immediate (Experiment 2), but not the 24-h delay (Experiment 3), post-session administration of prazosin attenuated the development of methamphetamine conditioned hyperactivity and context-specific sensitization. Nonspecific motor impairments were not observed in these latter experiments. Collectively, these results suggest that the α₁-adrenergic receptor mediates the development of methamphetamine-conditioned hyperactivity and context-specific sensitization, perhaps by altering memory consolidation and/or reconsolidation processes.
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de Mello Bastos JM, Dias FRC, Alves VHN, Carey RJ, Carrera MP. Drug memory substitution during re-consolidation: A single inhibitory autoreceptor apomorphine treatment given during psychostimulant memory re-consolidation replaces psychostimulant conditioning with conditioned inhibition and reverses psychostimulant sensitization. Behav Brain Res 2014; 260:139-47. [DOI: 10.1016/j.bbr.2013.11.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 10/31/2013] [Accepted: 11/02/2013] [Indexed: 10/26/2022]
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Lijffijt M, Hu K, Swann AC. Stress modulates illness-course of substance use disorders: a translational review. Front Psychiatry 2014; 5:83. [PMID: 25101007 PMCID: PMC4101973 DOI: 10.3389/fpsyt.2014.00083] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 06/30/2014] [Indexed: 11/21/2022] Open
Abstract
Childhood trauma and post-childhood chronic/repeated stress could increase the risk of a substance use disorder by affecting five stages of addiction illness-course: (a) initial experimentation with substances; (b) shifting from experimental to regular use; (c) escalation from regular use to abuse or dependence; (d) motivation to quit; and (e) risk of (re-)lapse. We reviewed the human literature on relationships between stress and addiction illness-course. We explored per illness-course stage: (i) whether childhood trauma and post-childhood chronic/repeated stress have comparable effects and (ii) whether effects cut across classes of substances of abuse. We further discuss potential underlying mechanisms by which stressors may affect illness-course stages for which we relied on evidence from studies in animals and humans. Stress and substances of abuse both activate stress and dopaminergic motivation systems, and childhood trauma and post-childhood stressful events are more chronic and occur more frequently in people who use substances. Stressors increase risk to initiate early use potentially by affecting trait-like factors of risk-taking, decision making, and behavioral control. Stressors also accelerate transition to regular use potentially due to prior effects of stress on sensitization of dopaminergic motivation systems, cross-sensitizing with substances of abuse, especially in people with high trait impulsivity who are more prone to sensitization. Finally, stressors increase risk for abuse and dependence, attenuate motivation to quit, and increase relapse risk potentially by intensified sensitization of motivational systems, by a shift from positive to negative reinforcement due to sensitization of the amygdala by corticotropin releasing factor, and by increased sensitization of noradrenergic systems. Stress generally affects addiction illness-course across stressor types and across classes of substances of abuse.
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Affiliation(s)
- Marijn Lijffijt
- Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine , Houston, TX , USA
| | - Kesong Hu
- Human Neuroscience Institute, Department of Human Development, Cornell University , Ithaca, NY , USA
| | - Alan C Swann
- Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine , Houston, TX , USA ; Mental Health Care Line, Michael E. DeBakey VA Medical Center , Houston, TX , USA
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Leyton M, Vezina P. Striatal ups and downs: their roles in vulnerability to addictions in humans. Neurosci Biobehav Rev 2013; 37:1999-2014. [PMID: 23333263 PMCID: PMC3743927 DOI: 10.1016/j.neubiorev.2013.01.018] [Citation(s) in RCA: 135] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2012] [Revised: 01/03/2013] [Accepted: 01/07/2013] [Indexed: 01/05/2023]
Abstract
Susceptibility to addictive behaviors has been related to both increases and decreases in striatal function. Both profiles have been reported in humans as well as in animal models. Yet, the mechanisms underlying these opposing effects and the manner in which they relate to the behavioral development and expression of addiction remain unclear. In the present review of human studies, we describe a number of factors that could influence whether striatal hyper- or hypo-function is observed and propose a model that integrates the influence of these opposite responses on the expression of addiction related behaviors. Central to this model is the role played by the presence versus absence of addiction related cues and their ability to regulate responding to abused drugs and other rewards. Striatal function and incentive motivational states are increased in the presence of these cues and decreased in their absence. Alternations between these states might account for the progressive narrowing of interests as addictions develop and point to relevant processes to target in treatment.
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Affiliation(s)
- Marco Leyton
- Department of Psychiatry, McGill University, 1033 Pine Avenue West, Montreal, Quebec, H3A 1A1 Canada.
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Abstract
Robert Weiss (1973) conceptualised loneliness as perceived social isolation, which he described as a gnawing, chronic disease without redeeming features. On the scale of everyday life, it is understandable how something as personally aversive as loneliness could be regarded as a blight on human existence. However, evolutionary time and evolutionary forces operate at such a different scale of organisation than we experience in everyday life that personal experience is not sufficient to understand the role of loneliness in human existence. Research over the past decade suggests a very different view of loneliness than suggested by personal experience, one in which loneliness serves a variety of adaptive functions in specific habitats. We review evidence on the heritability of loneliness and outline an evolutionary theory of loneliness, with an emphasis on its potential adaptive value in an evolutionary timescale.
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Affiliation(s)
- John T Cacioppo
- a Center for Cognitive and Social Neuroscience , University of Chicago , Chicago , IL , USA
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Setiawan E, Pihl RO, Dagher A, Schlagintweit H, Casey KF, Benkelfat C, Leyton M. Differential Striatal Dopamine Responses Following Oral Alcohol in Individuals at Varying Risk for Dependence. Alcohol Clin Exp Res 2013; 38:126-34. [DOI: 10.1111/acer.12218] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2012] [Accepted: 05/15/2013] [Indexed: 11/26/2022]
Affiliation(s)
- Elaine Setiawan
- Department of Psychiatry; McGill University; Montréal Québec Canada
- Department of Neurology and Neurosurgery; McGill University; Montréal Québec Canada
| | - Robert O. Pihl
- Department of Psychiatry; McGill University; Montréal Québec Canada
- Department of Psychology; McGill University; Montréal Québec Canada
| | - Alain Dagher
- Department of Neurology and Neurosurgery; McGill University; Montréal Québec Canada
| | | | - Kevin F. Casey
- Department of Psychiatry; McGill University; Montréal Québec Canada
- Department of Neurology and Neurosurgery; McGill University; Montréal Québec Canada
| | - Chawki Benkelfat
- Department of Psychiatry; McGill University; Montréal Québec Canada
- Department of Neurology and Neurosurgery; McGill University; Montréal Québec Canada
| | - Marco Leyton
- Department of Psychiatry; McGill University; Montréal Québec Canada
- Department of Neurology and Neurosurgery; McGill University; Montréal Québec Canada
- Department of Psychology; McGill University; Montréal Québec Canada
- Center for Studies in Behavioral Neurobiology; Concordia University; Montréal Québec Canada
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Trifilieff P, Martinez D. Imaging addiction: D2 receptors and dopamine signaling in the striatum as biomarkers for impulsivity. Neuropharmacology 2013; 76 Pt B:498-509. [PMID: 23851257 DOI: 10.1016/j.neuropharm.2013.06.031] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 06/12/2013] [Accepted: 06/28/2013] [Indexed: 12/12/2022]
Abstract
Dependence to drugs of abuse is closely associated with impulsivity, or the propensity to choose a lower, but immediate, reward over a delayed, but more valuable outcome. Here, we review clinical and preclinical studies showing that striatal dopamine signaling and D2 receptor levels - which have been shown to be decreased in addiction - directly impact impulsivity, which is itself predictive of drug self-administration. Based on these studies, we propose that the alterations in D2 receptor binding and dopamine release seen in imaging studies of addiction constitute neurobiological markers of impulsivity. Recent studies in animals also show that higher striatal dopamine signaling at the D2 receptor is associated with a greater willingness to expend effort to reach goals, and we propose that this same relationship applies to humans, particularly with respect to recovery from addiction. This article is part of a Special Issue entitled 'NIDA 40th Anniversary Issue'.
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Affiliation(s)
- Pierre Trifilieff
- New York State Psychiatric Institute, 1051 Riverside Drive #32, New York, NY 10032, USA; Nutrition and Integrative Neurobiology, INRA UMR 1286, F-33076 Bordeaux, France; University of Bordeaux, F-33076 Bordeaux, France
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48
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Rutten BPF, Hammels C, Geschwind N, Menne-Lothmann C, Pishva E, Schruers K, van den Hove D, Kenis G, van Os J, Wichers M. Resilience in mental health: linking psychological and neurobiological perspectives. Acta Psychiatr Scand 2013; 128:3-20. [PMID: 23488807 PMCID: PMC3746114 DOI: 10.1111/acps.12095] [Citation(s) in RCA: 220] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/17/2013] [Indexed: 01/05/2023]
Abstract
OBJECTIVE To review the literature on psychological and biological findings on resilience (i.e. the successful adaptation and swift recovery after experiencing life adversities) at the level of the individual, and to integrate findings from animal and human studies. METHOD Electronic and manual literature search of MEDLINE, EMBASE and PSYCHINFO, using a range of search terms around biological and psychological factors influencing resilience as observed in human and experimental animal studies, complemented by review articles and cross-references. RESULTS The term resilience is used in the literature for different phenomena ranging from prevention of mental health disturbance to successful adaptation and swift recovery after experiencing life adversities, and may also include post-traumatic psychological growth. Secure attachment, experiencing positive emotions and having a purpose in life are three important psychological building blocks of resilience. Overlap between psychological and biological findings on resilience in the literature is most apparent for the topic of stress sensitivity, although recent results suggest a crucial role for reward experience in resilience. CONCLUSION Improving the understanding of the links between genetic endowment, environmental impact and gene-environment interactions with developmental psychology and biology is crucial for elucidating the neurobiological and psychological underpinnings of resilience.
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Affiliation(s)
- B P F Rutten
- Department of Psychiatry and Psychology, Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience (MHeNS), European Graduate School of Neuroscience (EURON), Maastricht University Medical Centre, Maastricht, the Netherlands.
| | - C Hammels
- Department of Psychiatry and Psychology, Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience (MHeNS), European Graduate School of Neuroscience (EURON), Maastricht University Medical CentreMaastricht, the Netherlands
| | - N Geschwind
- Department of Psychiatry and Psychology, Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience (MHeNS), European Graduate School of Neuroscience (EURON), Maastricht University Medical CentreMaastricht, the Netherlands,Research Group on Health Psychology, CLEP, Department of Psychology, University of LeuvenLeuven, Belgium
| | - C Menne-Lothmann
- Department of Psychiatry and Psychology, Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience (MHeNS), European Graduate School of Neuroscience (EURON), Maastricht University Medical CentreMaastricht, the Netherlands
| | - E Pishva
- Department of Psychiatry and Psychology, Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience (MHeNS), European Graduate School of Neuroscience (EURON), Maastricht University Medical CentreMaastricht, the Netherlands
| | - K Schruers
- Department of Psychiatry and Psychology, Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience (MHeNS), European Graduate School of Neuroscience (EURON), Maastricht University Medical CentreMaastricht, the Netherlands,Center for Learning and Experimental Psychology, Catholic University of LeuvenLeuven, Belgium
| | - D van den Hove
- Department of Psychiatry and Psychology, Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience (MHeNS), European Graduate School of Neuroscience (EURON), Maastricht University Medical CentreMaastricht, the Netherlands,Department of Psychiatry, Psychosomatics and Psychotherapy, University of WürzburgWürzburg, Germany
| | - G Kenis
- Department of Psychiatry and Psychology, Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience (MHeNS), European Graduate School of Neuroscience (EURON), Maastricht University Medical CentreMaastricht, the Netherlands
| | - J van Os
- Department of Psychiatry and Psychology, Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience (MHeNS), European Graduate School of Neuroscience (EURON), Maastricht University Medical CentreMaastricht, the Netherlands,King's Health Partners, Department of Psychosis Studies, Institute of Psychiatry, King's College LondonLondon, UK
| | - M Wichers
- Department of Psychiatry and Psychology, Faculty of Health, Medicine and Life Sciences, School for Mental Health and Neuroscience (MHeNS), European Graduate School of Neuroscience (EURON), Maastricht University Medical CentreMaastricht, the Netherlands
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49
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Auger ML, Schmidt ERE, Manitt C, Dal-Bo G, Pasterkamp RJ, Flores C. unc5c haploinsufficient phenotype: striking similarities with the dcc haploinsufficiency model. Eur J Neurosci 2013; 38:2853-63. [PMID: 23738838 DOI: 10.1111/ejn.12270] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Revised: 04/08/2013] [Accepted: 05/03/2013] [Indexed: 01/28/2023]
Abstract
DCC and UNC5 homologs (UNC5H) are guidance cue receptors highly expressed by mesocorticolimbic dopamine neurons. We have shown that dcc heterozygous mice exhibit increased dopamine, but not norepinephrine, innervation and function in medial prefrontal cortex. Concomitantly, dcc heterozygotes show blunted mesolimbic dopamine release and behavioral responses to stimulant drugs. These changes appear only in adulthood. Recently, we found an adolescent emergence of UNC5H expression by dopamine neurons and co-expression of DCC and UNC5H by single dopamine cells. Here, we demonstrate selective expression of unc5 homolog c mRNA by dopamine neurons in adulthood. We show that unc5c haploinsufficiency results in diminished amphetamine-induced locomotion in male and female mice. This phenotype is identical to that produced by dcc haploinsufficiency and is observed after adolescence. Notably, and similar to dcc haploinsufficiency, unc5c haploinsufficiency leads to dramatic increases in tyrosine hydroxylase expression in the medial prefrontal cortex, but not in the nucleus accumbens. In contrast, medial prefrontal cortex dopamine-β-hydroxylase expression is not altered. We confirmed that UNC5C protein is reduced in the ventral tegmental area of unc5c heterozygous mice, but that DCC expression in this region remains unchanged. UNC5C receptors may also play a role in dopamine function and influence sensitivity to behavioral effects of stimulant drugs of abuse, at least upon first exposure. The striking similarities between the dcc and the unc5c haploinsufficient phenotypes raise the possibility that functions mediated by DCC/UNC5C complexes may be at play.
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Affiliation(s)
- Meagan L Auger
- Department of Psychiatry and of Neurology and Neurosurgery, McGill University, Douglas Mental Health University Institute, 6875 LaSalle Boulevard, Verdun, QC, Canada, H4H 1R3
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50
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Cousijn J, Goudriaan AE, Ridderinkhof KR, van den Brink W, Veltman DJ, Wiers RW. Neural responses associated with cue-reactivity in frequent cannabis users. Addict Biol 2013; 18:570-80. [PMID: 22264344 DOI: 10.1111/j.1369-1600.2011.00417.x] [Citation(s) in RCA: 119] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cue-reactivity reflects enhanced motivational processing underlying continued substance use and relapse in substance use disorders. Substance use disorders are associated with greater cue-reactivity in orbitofrontal cortex, anterior cingulate cortex, striatum, ventral tegmental area and amygdala. Here we examine whether this also holds for frequent cannabis users. Using functional magnetic resonance imaging (fMRI), neural responses to neutral and cannabis-related cues were compared between frequent cannabis users (n = 31), sporadic cannabis users (n = 20) and cannabis-naive controls (n = 21). In addition, fMRI findings were correlated with the level of cannabis use, problem severity and craving. In frequent users compared with sporadic users and controls, cannabis images engendered higher activation than control images in the ventral tegmental area. Activation of the orbitofrontal cortex, anterior cingulate cortex and striatum was only higher in a subgroup of frequent users with high compared with low-problem severity. Activity in the right putamen and right dorsolateral prefrontal cortex correlated negatively with subjective craving in frequent users. Activity was not correlated with level of cannabis use. These findings indicate that cannabis cues activate areas associated with addiction pathology in frequent cannabis users compared with sporadic users and controls. However, among frequent users, cue-reactivity seems to be primarily associated with problem severity, not with amount of cannabis use. These findings imply neural cue-reactivity as a tool in assessing problem severity of cannabis use.
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Affiliation(s)
- Janna Cousijn
- ADAPT-lab, Department of Psychology, University of Amsterdam, Weesperplein 4, Amsterdam, The Netherlands.
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