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Engel L, Wolff AR, Blake M, Collins VL, Sinha S, Saunders BT. Dopamine neurons drive spatiotemporally heterogeneous striatal dopamine signals during learning. Curr Biol 2024; 34:3086-3101.e4. [PMID: 38925117 PMCID: PMC11279555 DOI: 10.1016/j.cub.2024.05.069] [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] [Received: 03/25/2024] [Revised: 04/25/2024] [Accepted: 05/29/2024] [Indexed: 06/28/2024]
Abstract
Environmental cues, through Pavlovian learning, become conditioned stimuli that invigorate and guide animals toward rewards. Dopamine (DA) neurons in the ventral tegmental area (VTA) and substantia nigra (SNc) are crucial for this process, via engagement of a reciprocally connected network with their striatal targets. Critically, it remains unknown how dopamine neuron activity itself engages dopamine signals throughout the striatum, across learning. Here, we investigated how optogenetic Pavlovian cue conditioning of VTA or SNc dopamine neurons directs cue-evoked behavior and shapes subregion-specific striatal dopamine dynamics. We used a fluorescent biosensor to monitor dopamine in the nucleus accumbens (NAc) core and shell, dorsomedial striatum (DMS), and dorsolateral striatum (DLS). We demonstrate spatially heterogeneous, learning-dependent dopamine changes across striatal regions. Although VTA stimulation-evoked robust dopamine release in NAc core, shell, and DMS, predictive cues preferentially recruited dopamine release in NAc core, starting early in training, and DMS, late in training. Negative prediction error signals, reflecting a violation in the expectation of dopamine neuron activation, only emerged in the NAc core and DMS. Despite the development of vigorous movement late in training, conditioned dopamine signals did not emerge in the DLS, even during Pavlovian conditioning with SNc dopamine neuron activation, which elicited robust DLS dopamine release. Together, our studies show a broad dissociation in the fundamental prediction and reward-related information generated by VTA and SNc dopamine neuron populations and signaled by dopamine across the striatum. Further, they offer new insight into how larger-scale adaptations across the striatal network emerge during learning to coordinate behavior.
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Affiliation(s)
- Liv Engel
- Department of Neuroscience, University of Minnesota, 2001 6th St SE, Minneapolis, MN 55455, USA; Medical Discovery Team on Addiction, University of Minnesota, 2001 6th St SE, Minneapolis, MN 55455, USA
| | - Amy R Wolff
- Department of Neuroscience, University of Minnesota, 2001 6th St SE, Minneapolis, MN 55455, USA; Medical Discovery Team on Addiction, University of Minnesota, 2001 6th St SE, Minneapolis, MN 55455, USA
| | - Madelyn Blake
- Department of Neuroscience, University of Minnesota, 2001 6th St SE, Minneapolis, MN 55455, USA
| | - Val L Collins
- Department of Neuroscience, University of Minnesota, 2001 6th St SE, Minneapolis, MN 55455, USA; Medical Discovery Team on Addiction, University of Minnesota, 2001 6th St SE, Minneapolis, MN 55455, USA
| | - Sonal Sinha
- Krieger School of Arts & Sciences, Johns Hopkins University, 3400 N. Charles St, Baltimore, MD 21218, USA
| | - Benjamin T Saunders
- Department of Neuroscience, University of Minnesota, 2001 6th St SE, Minneapolis, MN 55455, USA; Medical Discovery Team on Addiction, University of Minnesota, 2001 6th St SE, Minneapolis, MN 55455, USA.
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2
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Jones BO, Paladino MS, Cruz AM, Spencer HF, Kahanek PL, Scarborough LN, Georges SF, Smith RJ. Punishment resistance for cocaine is associated with inflexible habits in rats. ADDICTION NEUROSCIENCE 2024; 11:100148. [PMID: 38859977 PMCID: PMC11164474 DOI: 10.1016/j.addicn.2024.100148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
Addiction is characterized by continued drug use despite negative consequences. In an animal model, a subset of rats continues to self-administer cocaine despite footshock consequences, showing punishment resistance. We sought to test the hypothesis that punishment resistance arises from failure to exert goal-directed control over habitual cocaine seeking. While habits are not inherently permanent or maladaptive, continued use of habits under conditions that should encourage goal-directed control makes them maladaptive and inflexible. We trained male and female Sprague Dawley rats on a seeking-taking chained schedule of cocaine self-administration. We then exposed them to four days of punishment testing in which footshock was delivered randomly on one-third of trials. Before and after punishment testing (four days pre-punishment and ≥ four days post-punishment), we assessed whether cocaine seeking was goal-directed or habitual using outcome devaluation via cocaine satiety. We found that punishment resistance was associated with continued use of habits, whereas punishment sensitivity was associated with increased goal-directed control. Although punishment resistance for cocaine was not predicted by habitual responding pre-punishment, it was associated with habitual responding post-punishment. In parallel studies of food self-administration, we similarly observed that punishment resistance was associated with habitual responding post-punishment but not pre-punishment in males, although it was associated with habitual responding both pre- and post-punishment in females, indicating that punishment resistance was predicted by habitual responding in food-seeking females. These findings indicate that punishment resistance is related to habits that have become inflexible and persist under conditions that should encourage a transition to goal-directed behavior.
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Affiliation(s)
- Bradley O Jones
- Institute for Neuroscience, Texas A&M University, College Station, TX, USA
| | - Morgan S Paladino
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, USA
| | - Adelis M Cruz
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, USA
| | - Haley F Spencer
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, USA
| | - Payton L Kahanek
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, USA
| | - Lauren N Scarborough
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, USA
| | - Sandra F Georges
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, USA
| | - Rachel J Smith
- Institute for Neuroscience, Texas A&M University, College Station, TX, USA
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, USA
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3
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Engel L, Wolff AR, Blake M, Collins VL, Sinha S, Saunders BT. Dopamine neurons drive spatiotemporally heterogeneous striatal dopamine signals during learning. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.07.01.547331. [PMID: 38585717 PMCID: PMC10996462 DOI: 10.1101/2023.07.01.547331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Environmental cues, through Pavlovian learning, become conditioned stimuli that invigorate and guide animals toward acquisition of rewards. Dopamine neurons in the ventral tegmental area (VTA) and substantia nigra (SNC) are crucial for this process. Dopamine neurons are embedded in a reciprocally connected network with their striatal targets, the functional organization of which remains poorly understood. Here, we investigated how learning during optogenetic Pavlovian cue conditioning of VTA or SNC dopamine neurons directs cue-evoked behavior and shapes subregion-specific striatal dopamine dynamics. We used a fluorescent dopamine biosensor to monitor dopamine in the nucleus accumbens (NAc) core and shell, dorsomedial striatum (DMS), and dorsolateral striatum (DLS). We demonstrate spatially heterogeneous, learning-dependent dopamine changes across striatal regions. While VTA stimulation evoked robust dopamine release in NAc core, shell, and DMS, cues predictive of this activation preferentially recruited dopamine release in NAc core, starting early in training, and DMS, late in training. Corresponding negative prediction error signals, reflecting a violation in the expectation of dopamine neuron activation, only emerged in the NAc core and DMS, and not the shell. Despite development of vigorous movement late in training, conditioned dopamine signals did not similarly emerge in the DLS, even during Pavlovian conditioning with SNC dopamine neuron activation, which elicited robust DLS dopamine release. Together, our studies show broad dissociation in the fundamental prediction and reward-related information generated by different dopamine neuron populations and signaled by dopamine across the striatum. Further, they offer new insight into how larger-scale plasticity across the striatal network emerges during Pavlovian learning to coordinate behavior.
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Affiliation(s)
- Liv Engel
- Department of Neuroscience, University of Minnesota
- Medical Discovery Team on Addiction, University of Minnesota
- Current Address: Department of Psychology, University of Toronto
| | - Amy R Wolff
- Department of Neuroscience, University of Minnesota
- Medical Discovery Team on Addiction, University of Minnesota
| | - Madelyn Blake
- Department of Neuroscience, University of Minnesota
- Medical Discovery Team on Addiction, University of Minnesota
| | - Val L Collins
- Department of Neuroscience, University of Minnesota
- Medical Discovery Team on Addiction, University of Minnesota
| | | | - Benjamin T Saunders
- Department of Neuroscience, University of Minnesota
- Medical Discovery Team on Addiction, University of Minnesota
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Zhang Y, Randesi M, Blendy JA, Kreek MJ, Butelman ER. Impact of OPRM1 (Mu-opioid Receptor Gene) A112G Polymorphism on Dual Oxycodone and Cocaine Self-administration Behavior in a Mouse Model. Neuroscience 2024; 539:76-85. [PMID: 38211933 DOI: 10.1016/j.neuroscience.2024.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 12/28/2023] [Accepted: 01/05/2024] [Indexed: 01/13/2024]
Abstract
The use of mu-opioid receptor (MOP-r) agonists such as oxycodone together with cocaine is prevalent, and deaths attributed to using these combinations have increased. RATIONALE It is unknown if functional single nucleotide polymorphisms (SNPs), such as the OPRM1 (MOP-r gene) SNP A118G, can predispose individuals to more dual opioid and psychostimulant intake. The dual self-administration (SA) of MOP-r agonists and cocaine has not been thoroughly examined, especially with regard to neurobiological changes. OBJECTIVES We examined oxycodone SA and subsequent dual oxycodone and cocaine SA in male and female A112G (A/G and G/G, heterozygote and homozygote, respectively) mice, models of human A118G carriers, versus wild-type (A/A) mice. METHODS Adult male and female A/G, G/G and A/A mice self-administered oxycodone (0.25 mg/kg/infusion, 4hr/session, FR 1.) for 10 consecutive days (sessions 1-10). Mice then self-administered cocaine (2 hr) following oxycodone SA (4 hr, as above) in each session for a further 10 consecutive days (sessions 11-20). Message RNA transcripts of 24 reward-related genes were examined in the dorsal striatum. RESULTS Male and female A/G and G/G mice had greater oxycodone SA than A/A mice did in the initial 10 days and in the last 10 sessions. Further, A/G and G/G mice showed greater cocaine intake than A/A mice. Dorsal striatal mRNA levels of Pdyn, Fkbp5, Oprk1, and Oprm1 were altered following oxycodone and cocaine SA. CONCLUSIONS These studies demonstrated that this functional genetic variation in Oprm1 affected dual opioid and cocaine SA and altered specific gene expression in the striatum.
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Affiliation(s)
- Yong Zhang
- Laboratory of the Biology of Addictive Diseases, the Rockefeller University, New York, NY 10065, United States.
| | - Matthew Randesi
- Laboratory of the Biology of Addictive Diseases, the Rockefeller University, New York, NY 10065, United States
| | - Julie A Blendy
- Department of Systems Pharmacology and Translational Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
| | - Mary Jeanne Kreek
- Laboratory of the Biology of Addictive Diseases, the Rockefeller University, New York, NY 10065, United States
| | - Eduardo R Butelman
- Laboratory of the Biology of Addictive Diseases, the Rockefeller University, New York, NY 10065, United States; Neuropsychoimaging of Addictions and Related Conditions Research Program, Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY 10029, United States
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Estrin DJ, Kulik JM, Beacher NJ, Pawlak AP, Klein SD, West MO. Acquired Alterations in Nucleus Accumbens Responsiveness to a Cocaine-Paired Discriminative Stimulus Preceding Rats' Daily Cocaine Consumption. ADDICTION NEUROSCIENCE 2023; 8:100121. [PMID: 37664217 PMCID: PMC10470667 DOI: 10.1016/j.addicn.2023.100121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Resumption of drug taking is a primary focus for substance use disorder research and can be triggered by drug-associated environmental stimuli. The Nucleus Accumbens (NAc) is a key brain region which guides motivated behavior and is implicated in resumption. There remains a pressing need to characterize NAc neurons' responsiveness to drug associated stimuli during withdrawal and abstinence. We recorded discriminative stimulus (DS) induced NAc activity via in vivo single-unit electrophysiology in rats that self-administered cocaine. Male and female rats implanted with a jugular catheter and a microwire array in NAc Core and Shell self-administered cocaine under control of a 30s auditory DS for 6 hours per session across 14 consecutive days. Rats acquired tone discrimination within 4 sessions. To exclude pharmacological effects of circulating cocaine from all neural analyses, we studied changes in DS-induced firing only for trials preceding the first infusion of cocaine in each of the 14 sessions, which were defined as "pre-drug trials." NAc neuron responses were assessed prior to tone-evoked movement onset. Responsiveness to the DS tone was exhibited throughout all sessions by the NAc Core population, but only during Early sessions by the NAc Shell population. Both Core and Shell responded selectively to the DS, i.e., more strongly on drug taking trials, or Hits, than on Missed opportunities. These findings suggest that NAc Core and Shell play distinct roles in initiating cocaine seeking prior to daily cocaine consumption, and align with reports suggesting that as drug use becomes chronic, cue-evoked activity shifts from NAc Shell to NAc Core.
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Affiliation(s)
- David J. Estrin
- Feil Family Brain & Mind Research Institute, Weill Cornell Medicine, 413 East 69 Street, New York, NY 10021
- Department of Psychology, Rutgers University, 152 Frelinghuysen Road, Piscataway, NJ 08854
| | - Julianna M. Kulik
- Department of Psychology, Rutgers University, 152 Frelinghuysen Road, Piscataway, NJ 08854
| | - Nicholas J. Beacher
- Department of Psychology, Rutgers University, 152 Frelinghuysen Road, Piscataway, NJ 08854
- Neural Engineering Section, National Institute on Drug Abuse, 333 Cassell Drive, Baltimore, MD 21224
| | - Anthony P. Pawlak
- Department of Psychology, Rutgers University, 152 Frelinghuysen Road, Piscataway, NJ 08854
- Center of Alcohol & Substance Use Studies, University of Minnesota-Twin Cities, 75 East River Road, Minneapolis, MN 55455
- Graduate School of Applied & Professional Psychology, University of Minnesota-Twin Cities, 75 East River Road, Minneapolis, MN 55455
| | - Samuel D. Klein
- Department of Psychology, Rutgers University, 152 Frelinghuysen Road, Piscataway, NJ 08854
- Department of Psychology, University of Minnesota-Twin Cities, 75 East River Road, Minneapolis, MN 55455
| | - Mark O. West
- Department of Psychology, Rutgers University, 152 Frelinghuysen Road, Piscataway, NJ 08854
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Marti-Prats L, Giuliano C, Domi A, Puaud M, Peña-Oliver Y, Fouyssac M, McKenzie C, Everitt BJ, Belin D. The development of compulsive coping behavior depends on dorsolateral striatum dopamine-dependent mechanisms. Mol Psychiatry 2023; 28:4666-4678. [PMID: 37770577 PMCID: PMC10914627 DOI: 10.1038/s41380-023-02256-z] [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: 04/14/2023] [Revised: 09/04/2023] [Accepted: 09/08/2023] [Indexed: 09/30/2023]
Abstract
Humans greatly differ in how they cope with stress, a natural behavior learnt through negative reinforcement. Some individuals engage in displacement activities, others in exercise or comfort eating, and others still in alcohol use. Across species, adjunctive behaviors, such as polydipsic drinking, are used as a form of displacement activity that reduces stress. Some individuals, in particular those that use alcohol to self-medicate, tend to lose control over such coping behaviors, which become excessive and compulsive. However, the psychological and neural mechanisms underlying this individual vulnerability have not been elucidated. Here we tested the hypothesis that the development of compulsive adjunctive behaviors stems from the functional engagement of the dorsolateral striatum (DLS) dopamine-dependent habit system after a prolonged history of adjunctive responding. We measured in longitudinal studies in male Sprague Dawley rats the sensitivity of early established vs compulsive polydipsic water or alcohol drinking to a bilateral infusion into the anterior DLS (aDLS) of the dopamine receptor antagonist α-flupentixol. While most rats acquired a polydipsic drinking response with water, others only did so with alcohol. Whether drinking water or alcohol, the acquisition of this coping response was insensitive to aDLS dopamine receptor blockade. In contrast, after prolonged experience, adjunctive drinking became dependent on aDLS dopamine at a time when it was compulsive in vulnerable individuals. These data suggest that habits may develop out of negative reinforcement and that the engagement of their underlying striatal system is necessary for the manifestation of compulsive adjunctive behaviors.
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Affiliation(s)
- Lucia Marti-Prats
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK
| | - Chiara Giuliano
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK
- Astra Zeneca, R&D Biopharmaceuticals, Fleming Building (B623), Babraham Research Park, Babraham, Cambridgeshire, CB22 3AT, UK
| | - Ana Domi
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, Sahlgrenska Academy University of Gothenburg, Box 410, Gothenburg, 405 30, Sweden
| | - Mickaël Puaud
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK
| | - Yolanda Peña-Oliver
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK
- Research and Enterprise Services, University of Sussex, Brighton, UK
| | - Maxime Fouyssac
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK
| | - Colin McKenzie
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK
| | - Barry J Everitt
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK
| | - David Belin
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, UK.
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Dong X, Zhornitsky S, Wang W, Le TM, Chen Y, Chaudhary S, Li CSR, Zhang S. Resting-State Functional Connectivity of the Dorsal and Ventral Striatum, Impulsivity, and Severity of Use in Recently Abstinent Cocaine-Dependent Individuals. Int J Neuropsychopharmacol 2023; 26:627-638. [PMID: 37579016 PMCID: PMC10519818 DOI: 10.1093/ijnp/pyac019] [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: 12/08/2021] [Revised: 02/03/2022] [Accepted: 03/01/2022] [Indexed: 08/16/2023] Open
Abstract
BACKGROUND Previous studies have focused on both ventral striatum (VS) and dorsal striatum (DS) in characterizing dopaminergic deficits in addiction. Animal studies suggest VS and DS dysfunction each in association with impulsive and compulsive cocaine use during early and later stages of addiction. However, few human studies have aimed to distinguish the roles of VS and DS dysfunction in cocaine misuse. METHODS We examined VS and DS resting-state functional connectivity (rsFC) of 122 recently abstinent cocaine-dependent individuals (CDs) and 122 healthy controls (HCs) in 2 separate cohorts. We followed published routines in imaging data analyses and evaluated the results at a corrected threshold with age, sex, years of drinking, and smoking accounted for. RESULTS CDs relative to HCs showed higher VS rsFC with the left inferior frontal cortex (IFC), lower VS rsFC with the hippocampus, and higher DS rsFC with the left orbitofrontal cortex. Region-of-interest analyses confirmed the findings in the 2 cohorts examined separately. In CDs, VS-left IFC and VS-hippocampus connectivity was positively and negatively correlated with average monthly cocaine use in the prior year, respectively. In the second cohort where participants were assessed with the Barratt Impulsivity Scale (BIS-11), VS-left IFC and VS-hippocampus connectivity was also positively and negatively correlated with BIS-11 scores in CDs. In contrast, DS-orbitofrontal cortex connectivity did not relate significantly to cocaine use metrics or BIS-11 scores. CONCLUSION These findings associate VS rsFC with impulsivity and the severity of recent cocaine use. How DS connectivity partakes in cocaine misuse remains to be investigated.
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Affiliation(s)
- Xue Dong
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut, USA
- Department of Psychology, Youth Mental Health Education Center, Shaanxi University of Science & Technology, Xian, Shaanxi, China
| | - Simon Zhornitsky
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Wuyi Wang
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Thang M Le
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Yu Chen
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Shefali Chaudhary
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Chiang-Shan R Li
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut, USA
- Department of Neuroscience, Yale University School of Medicine, New Haven, Connecticut, USA
- Interdepartmental Neuroscience Program, Yale University, New Haven, Connecticut, USA
- Wu Tsai Institute, Yale University, New Haven, Connecticut, USA
| | - Sheng Zhang
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut, USA
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8
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Jones BO, Paladino MS, Cruz AM, Spencer HF, Kahanek PL, Scarborough LN, Georges SF, Smith RJ. Punishment resistance for cocaine is associated with inflexible habits in rats. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.08.544242. [PMID: 37333299 PMCID: PMC10274925 DOI: 10.1101/2023.06.08.544242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
Addiction is characterized by continued drug use despite negative consequences. In an animal model, a subset of rats continues to self-administer cocaine despite footshock consequences, showing punishment resistance. We sought to test the hypothesis that punishment resistance arises from failure to exert goal-directed control over habitual cocaine seeking. While habits are not inherently permanent or maladaptive, continued use of habits under conditions that should encourage goal-directed control makes them maladaptive and inflexible. We trained male and female Sprague Dawley rats on a seeking-taking chained schedule of cocaine self-administration (2 h/day). We then exposed them to 4 days of punishment testing, in which footshock (0.4 mA, 0.3 s) was delivered randomly on one-third of trials, immediately following completion of seeking and prior to extension of the taking lever. Before and after punishment testing (4 days pre-punishment and ≥4 days post-punishment), we assessed whether cocaine seeking was goal-directed or habitual using outcome devaluation via cocaine satiety. We found that punishment resistance was associated with continued use of habits, whereas punishment sensitivity was associated with increased goal-directed control. Although punishment resistance was not predicted by habitual responding pre-punishment, it was associated with habitual responding post-punishment. In parallel studies of food self-administration, we similarly observed that punishment resistance was associated with habitual responding post-punishment but not pre-punishment. These findings indicate that punishment resistance is related to habits that have become inflexible and persist under conditions that should encourage a transition to goal-directed behavior.
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Affiliation(s)
- Bradley O. Jones
- Institute for Neuroscience, Texas A&M University, College Station, TX, USA
| | - Morgan S. Paladino
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, USA
| | - Adelis M. Cruz
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, USA
| | - Haley F. Spencer
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, USA
| | - Payton L. Kahanek
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, USA
| | - Lauren N. Scarborough
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, USA
| | - Sandra F. Georges
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, USA
| | - Rachel J. Smith
- Institute for Neuroscience, Texas A&M University, College Station, TX, USA
- Department of Psychological and Brain Sciences, Texas A&M University, College Station, TX, USA
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9
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Porrino LJ, Smith HR, Beveridge TJ, Miller MD, Nader SH, Nader MA. Prolonged Exposure to Cocaine Self-Administration Results in a Continued Progression of Alterations in Functional Activity in a Nonhuman Primate Model. DRUG AND ALCOHOL DEPENDENCE REPORTS 2023; 7:100148. [PMID: 37033159 PMCID: PMC10074498 DOI: 10.1016/j.dadr.2023.100148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 03/16/2023] [Accepted: 03/16/2023] [Indexed: 03/19/2023]
Abstract
Background Studies of nonhuman primates with exposures of up to 100 days of cocaine self-administration (SA) have provided evidence that the central effects of cocaine progress over time. These durations of cocaine exposure, however, may be insufficient to capture the extent of the neurobiological alterations observed in cocaine users, many of whom use the drug for years. The goal of the present study was to determine whether 1.5 years of cocaine SA would result in further progression of alterations in functional brain activity. Methods Adult male rhesus monkeys were exposed to 300 sessions of high-dose cocaine SA over 1.5 years. Following the final session rates of local cerebral glucose utilization (LCGU) were assessed with the 2-[14C]-deoxyglucose method and compared to rates of LCGU in control monkeys who responded for food reinforcement. In addition, LCGU in these animals was compared to a previously published group of monkeys that had self-administered cocaine or food for 100 sessions over a 4-5 month period. Results Compared to 100 days of exposure, 300 days of cocaine SA further reduced LCGU in the post-commissural striatum and produced reductions in areas unaffected by the shorter duration of exposure, such as the hypothalamus, all of the amygdala, and large expanses of cortex. Conclusions These findings demonstrate a clear progression of the impact of cocaine on functional activity with increasing durations of drug experience and have important implications for the development of potential strategies for the treatment of cocaine use disorder.
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Fox HC, Milivojevic V, Sinha R. Therapeutics for Substance-Using Women: The Need to Elucidate Sex-Specific Targets for Better-Tailored Treatments. Handb Exp Pharmacol 2023; 282:127-161. [PMID: 37592081 DOI: 10.1007/164_2023_687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
In the last decade, alcohol consumption in the US has risen by 84% in women compared with 35% in men. Furthermore, research has shown that sex- and gender-related differences may disadvantage women in terms of developing a range of psychological, cognitive, and medical problems considerably earlier in their drinking history than men, and despite consuming a similar quantity of substances. While this "telescoping" process has been acknowledged in the literature, a concomitant understanding of the underlying biobehavioral mechanisms, and an increase in the development of specific treatments tailored to women, has not occurred. In the current chapter we focus on understanding why the need for personalized, sex-specific medications is imperative, and highlight some of the potential sex-specific gonadal and stress-related adaptations underpinning the accelerated progress from controlled to compulsive drug and alcohol seeking in women. We additionally discuss the efficacy of these mechanisms as novel targets for medications development, using exogenous progesterone and guanfacine as examples. Finally, we assess some of the challenges faced and progress made in terms of developing innovative medications in women. We suggest that agents such as exogenous progesterone and adrenergic medications, such as guanfacine, may provide some efficacy in terms of attenuating stress-induced craving for several substances, as well as improving the ability to emotionally regulate in the face of stress, preferentially in women. However, to fully leverage the potential of these therapeutics in substance-using women, greater focus needs to the placed on reducing barriers to treatment and research by encouraging women into clinical trials.
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Affiliation(s)
- Helen C Fox
- Department of Psychiatry and Behavioral Health, Renaissance School of Medicine, Stony Brook University, Stony Brook, NY, USA.
| | - Verica Milivojevic
- The Yale Stress Center, Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
| | - Rajita Sinha
- The Yale Stress Center, Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
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Porrino LJ, Smith HR, Beveridge TJR, Miller MD, Nader SH, Nader MA. Residual deficits in functional brain activity after chronic cocaine self-administration in rhesus monkeys. Neuropsychopharmacology 2023; 48:290-298. [PMID: 34385608 PMCID: PMC9751134 DOI: 10.1038/s41386-021-01136-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 07/27/2021] [Accepted: 08/01/2021] [Indexed: 12/26/2022]
Abstract
Previous studies in humans and in animals have shown dramatic effects of cocaine on measures of brain function that persist into abstinence. The purpose of this study was to examine the neurobiological consequences of abstinence from cocaine, using a model that removes the potential confound of cocaine cues. Adult male rhesus monkeys self-administered cocaine (0.3 mg/kg/injection; N = 8) during daily sessions or served as food-reinforcement controls (N = 4). Two times per week, monkeys were placed in a neutral environment and presented with a cartoon video for ~30 min, sometimes pre- and sometimes post-operant session, but no reinforcement was presented during the video. After ~100 sessions and when the cocaine groups had self-administered 900 mg/kg cocaine, the final experimental condition was a terminal 2-[14C]-deoxyglucose procedure, which occurred in the neutral (cartoon video) environment; for half of the monkeys in each group, this occurred after 1 day of abstinence and for the others after 30 days of abstinence. Rates of local cerebral glucose metabolism were measured in 57 brain regions. Global rates of cerebral metabolism were significantly lower in animals 1 day and 30 days post-cocaine self-administration when compared to those of food-reinforced controls. Effects were larger in 30- vs. 1-day cocaine abstinence, especially in prefrontal, parietal and cingulate cortex, as well as dorsal striatum and thalamus. Because these measures were obtained from monkeys while in a neutral environment, the deficits in glucose utilization can be attributed to the consequences of cocaine exposure and not to effects of conditioned stimuli associated with cocaine.
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Affiliation(s)
- Linda J Porrino
- Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston Salem, NC, USA.
| | - Hilary R Smith
- Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Thomas J R Beveridge
- Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Mack D Miller
- Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Susan H Nader
- Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Michael A Nader
- Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston Salem, NC, USA
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12
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The Protective Effect of Social Reward on Opioid and Psychostimulant Reward and Relapse: Behavior, Pharmacology, and Brain Regions. J Neurosci 2022; 42:9298-9314. [PMID: 36517252 PMCID: PMC9794371 DOI: 10.1523/jneurosci.0931-22.2022] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 10/27/2022] [Accepted: 10/31/2022] [Indexed: 12/30/2022] Open
Abstract
Until recently, most modern neuroscience research on addiction using animal models did not incorporate manipulations of social factors. Social factors play a critical role in human addiction: social isolation and exclusion can promote drug use and relapse, while social connections and inclusion tend to be protective. Here, we discuss the state of the literature on social factors in animal models of opioid and psychostimulant preference, self-administration, and relapse. We first summarize results from rodent studies on behavioral, pharmacological, and circuit mechanisms of the protective effect of traditional experimenter-controlled social interaction procedures on opioid and psychostimulant conditioned place preference, self-administration, and relapse. Next, we summarize behavioral and brain-mechanism results from studies using newer operant social-interaction procedures that inhibit opioid and psychostimulant self-administration and relapse. We conclude by discussing how the reviewed studies point to future directions for the addiction field and other neuroscience and psychiatric fields, and their implications for mechanistic understanding of addiction and development of new treatments.SIGNIFICANCE STATEMENT In this review, we propose that incorporating social factors into modern neuroscience research on addiction could improve mechanistic accounts of addiction and help close gaps in translating discovery to treatment. We first summarize rodent studies on behavioral, pharmacological, and circuit mechanisms of the protective effect of both traditional experimenter-controlled and newer operant social-interaction procedures. We then discuss potential future directions and clinical implications.
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13
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Zakiniaeiz Y, Liu H, Gao H, Najafzadeh S, Ropchan J, Nabulsi N, Huang Y, Matuskey D, Chen MK, Cosgrove KP, Morris ED. Nicotine Patch Alters Patterns of Cigarette Smoking-Induced Dopamine Release: Patterns Relate to Biomarkers Associated With Treatment Response. Nicotine Tob Res 2022; 24:1597-1606. [PMID: 35100429 PMCID: PMC9575980 DOI: 10.1093/ntr/ntac026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 12/04/2021] [Accepted: 01/26/2022] [Indexed: 11/13/2022]
Abstract
INTRODUCTION Tobacco smoking is a major public health burden. The first-line pharmacological treatment for tobacco smoking is nicotine replacement therapy (eg, the nicotine patch (NIC)). Nicotine acts on nicotinic-acetylcholine receptors on dopamine terminals to release dopamine in the ventral and dorsal striatum encoding reward and habit formation, respectively. AIMS AND METHODS To better understand treatment efficacy, a naturalistic experimental design combined with a kinetic model designed to characterize smoking-induced dopamine release in vivo was used. Thirty-five tobacco smokers (16 female) wore a NIC (21 mg, daily) for 1-week and a placebo patch (PBO) for 1-week in a randomized, counter-balanced order. Following 1-week under NIC and then overnight abstinence, smokers participated in a 90-minute [11C]raclopride positron emission tomography scan and smoked a cigarette while in the scanner. Identical procedures were followed for the PBO scan. A time-varying kinetic model was used at the voxel level to model transient dopamine release peaking instantaneously at the start of the stimulus and decaying exponentially. Magnitude and spatial extent of dopamine release were estimated. Smokers were subcategorized by nicotine dependence level and nicotine metabolism rate. RESULTS Dopamine release magnitude was enhanced by NIC in ventral striatum and diminished by NIC in dorsal striatum. More-dependent smokers activated more voxels than the less-dependent smokers under both conditions. Under PBO, fast metabolizers activated more voxels in ventral striatum and fewer voxels in dorsal striatum compared to slow metabolizers. CONCLUSIONS These findings demonstrate that the model captured a pattern of transient dopamine responses to cigarette smoking which may be different across smoker subgroup categorizations. IMPLICATIONS This is the first study to show that NIC alters highly localized patterns of cigarette smoking-induced dopamine release and that levels of nicotine dependence and nicotine clearance rate contribute to these alterations. This current work included a homogeneous subject sample with regards to demographic and smoking variables, as well as a highly sensitive model capable of detecting significant acute dopamine transients. The findings of this study add support to the recent identification of biomarkers for predicting the effect of nicotine replacement therapies on dopamine function which could help refine clinical practice for smoking cessation.
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Affiliation(s)
- Yasmin Zakiniaeiz
- Department of Psychiatry, Yale University, New Haven, CT, USA
- Yale Positron Emission Tomography (PET) Center, Yale University, New Haven, CT, USA
| | - Heather Liu
- Department of Biomedical Engineering, Yale University, New Haven, CT, USA
| | - Hong Gao
- Yale Positron Emission Tomography (PET) Center, Yale University, New Haven, CT, USA
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
| | - Soheila Najafzadeh
- Yale Positron Emission Tomography (PET) Center, Yale University, New Haven, CT, USA
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
| | - Jim Ropchan
- Yale Positron Emission Tomography (PET) Center, Yale University, New Haven, CT, USA
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
| | - Nabeel Nabulsi
- Yale Positron Emission Tomography (PET) Center, Yale University, New Haven, CT, USA
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
| | - Yiyun Huang
- Yale Positron Emission Tomography (PET) Center, Yale University, New Haven, CT, USA
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
| | - David Matuskey
- Department of Psychiatry, Yale University, New Haven, CT, USA
- Yale Positron Emission Tomography (PET) Center, Yale University, New Haven, CT, USA
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
| | - Ming-Kai Chen
- Yale Positron Emission Tomography (PET) Center, Yale University, New Haven, CT, USA
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
| | - Kelly P Cosgrove
- Department of Psychiatry, Yale University, New Haven, CT, USA
- Yale Positron Emission Tomography (PET) Center, Yale University, New Haven, CT, USA
| | - Evan D Morris
- Department of Psychiatry, Yale University, New Haven, CT, USA
- Yale Positron Emission Tomography (PET) Center, Yale University, New Haven, CT, USA
- Department of Biomedical Engineering, Yale University, New Haven, CT, USA
- Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
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14
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Fouyssac M, Peña-Oliver Y, Puaud M, Lim NTY, Giuliano C, Everitt BJ, Belin D. Negative Urgency Exacerbates Relapse to Cocaine Seeking After Abstinence. Biol Psychiatry 2022; 91:1051-1060. [PMID: 34922736 DOI: 10.1016/j.biopsych.2021.10.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 09/21/2021] [Accepted: 10/08/2021] [Indexed: 12/27/2022]
Abstract
BACKGROUND The mechanisms through which drug-cue-induced negative affective states are involved in relapse have not been defined. We tested the hypothesis that in individuals having developed a dorsolateral striatum (DLS)-dependent cue-controlled cocaine-seeking habit, the loss of the opportunity to enact the drug-seeking response during abstinence results in an urge to act that exacerbates relapse severity mediated by negative urgency. METHODS Eighty-seven male Sprague Dawley rats were trained to seek cocaine under the influence of the conditioned reinforcing properties of drug-paired cues or not. We investigated whether the tendency to relapse depended on the aversive state of withdrawal or instead on the loss of opportunity to perform the ingrained drug-seeking response after periods of abstinence. The striatal locus of control over cocaine seeking at baseline and relapse was investigated using in situ hybridization of the cellular activity marker C-fos and assessment of the sensitivity of instrumental drug seeking to dopamine receptor blockade in the dorsomedial striatum-dependent goal-directed and DLS-dependent habit systems. RESULTS The development of a DLS-dependent cue-controlled cocaine-seeking habit prior to abstinence resulted in a marked increase in drug seeking at relapse, which was not motivated by a cocaine withdrawal state and was no longer dependent on the DLS habit system. Instead, it reflected the emergence of negative urgency caused by the prevention of the performance of the habit during abstinence and underpinned by transient engagement of the goal-directed system. CONCLUSIONS These results show that ingrained cue-controlled drug-seeking habits increase the pressure to relapse.
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Affiliation(s)
- Maxime Fouyssac
- Department of Psychology, University of Cambridge, Cambridge, United Kingdom
| | - Yolanda Peña-Oliver
- Department of Psychology, University of Cambridge, Cambridge, United Kingdom
| | - Mickaёl Puaud
- Department of Psychology, University of Cambridge, Cambridge, United Kingdom
| | - Nicole T Y Lim
- Department of Psychology, University of Cambridge, Cambridge, United Kingdom
| | - Chiara Giuliano
- Department of Psychology, University of Cambridge, Cambridge, United Kingdom
| | - Barry J Everitt
- Department of Psychology, University of Cambridge, Cambridge, United Kingdom
| | - David Belin
- Department of Psychology, University of Cambridge, Cambridge, United Kingdom.
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15
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Angarita GA, Worhunsky PD, Naganawa M, Toyonaga T, Nabulsi NB, Li CSR, Esterlis I, Skosnik PD, Radhakrishnan R, Pittman B, Gueorguieva R, Potenza MN, Finnema SJ, Huang Y, Carson RE, Malison RT. Lower prefrontal cortical synaptic vesicle binding in cocaine use disorder: An exploratory 11 C-UCB-J positron emission tomography study in humans. Addict Biol 2022; 27:e13123. [PMID: 34852401 PMCID: PMC8891080 DOI: 10.1111/adb.13123] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 09/22/2021] [Accepted: 11/12/2021] [Indexed: 12/22/2022]
Abstract
Preclinical studies have revealed robust and long-lasting alterations in dendritic spines in the brain following cocaine exposure. Such alterations are hypothesized to underlie enduring maladaptive behaviours observed in cocaine use disorder (CUD). The current study explored whether synaptic density is altered in CUD. Fifteen individuals with DSM-5 CUD and 15 demographically matched healthy control (HC) subjects participated in a single 11 C-UCB-J positron emission tomography scan to assess density of synaptic vesicle glycoprotein 2A (SV2A). The volume of distribution (VT ) and the plasma-free fraction-corrected form of the total volume of distribution (VT /fP ) were analysed in the anterior cingulate cortex (ACC), dorsomedial and ventromedial prefrontal cortex (PFC), lateral and medial orbitofrontal cortex (OFC) and ventral striatum. A significant diagnostic-group-by-region interaction was observed for VT and VT /fP . Post hoc analyses revealed no differences on VT , while for VT /fP showed lower values in CUD as compared with HC subjects in the ACC (-10.9%, p = 0.02), ventromedial PFC (-9.9%, p = 0.02) and medial OFC (-9.9%, p = 0.04). Regional VT /fP values in CUD, though unrelated to measures of lifetime cocaine use, were positively correlated with the frequency of recent cocaine use (p = 0.02-0.03) and negatively correlated with cocaine abstinence (p = 0.008-0.03). These findings provide initial preliminary in vivo evidence of altered (lower) synaptic density in the PFC of humans with CUD. Cross-sectional variation in SV2A availability as a function of recent cocaine use and abstinence suggests that synaptic density may be dynamically and plastically regulated by acute cocaine, an observation that merits direct testing by studies using more definitive longitudinal designs.
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Affiliation(s)
- Gustavo A. Angarita
- Department of Psychiatry, Yale University School of Medicine, 300 George Street, Suite # 901, New Haven, CT 06511
- Connecticut Mental Health Center, 34 Park Street, New Haven, CT 06519
| | - Patrick D. Worhunsky
- Department of Psychiatry, Yale University School of Medicine, 300 George Street, Suite # 901, New Haven, CT 06511
| | - Mika Naganawa
- Department of Radiology and Biomedical Imaging, Yale University School of Medicine, 801 Howard Ave, New Haven, CT 06519
| | - Takuya Toyonaga
- Department of Radiology and Biomedical Imaging, Yale University School of Medicine, 801 Howard Ave, New Haven, CT 06519
| | - Nabeel B. Nabulsi
- Department of Radiology and Biomedical Imaging, Yale University School of Medicine, 801 Howard Ave, New Haven, CT 06519
| | - Chiang-Shan R. Li
- Department of Psychiatry, Yale University School of Medicine, 300 George Street, Suite # 901, New Haven, CT 06511
- Connecticut Mental Health Center, 34 Park Street, New Haven, CT 06519
| | - Irina Esterlis
- Department of Psychiatry, Yale University School of Medicine, 300 George Street, Suite # 901, New Haven, CT 06511
| | - Patrick D. Skosnik
- Department of Psychiatry, Yale University School of Medicine, 300 George Street, Suite # 901, New Haven, CT 06511
| | - Rajiv Radhakrishnan
- Department of Psychiatry, Yale University School of Medicine, 300 George Street, Suite # 901, New Haven, CT 06511
| | - Brian Pittman
- Department of Psychiatry, Yale University School of Medicine, 300 George Street, Suite # 901, New Haven, CT 06511
| | - Ralitza Gueorguieva
- Department of Biostatistics, Yale School of Public Health, 60 College Street, New Haven CT 06520
| | - Marc N. Potenza
- Department of Psychiatry, Yale University School of Medicine, 300 George Street, Suite # 901, New Haven, CT 06511
- Connecticut Mental Health Center, 34 Park Street, New Haven, CT 06519
- Connecticut Council on Problem Gambling, 100 Great Meadow Road, Wethersfield, CT 06109
- Child Study Center, Yale University School of Medicine, 234 South Frontage Road, New Haven, CT 06510
- Department of Neuroscience, Yale University School of Medicine, 333 Cedar Street, New Haven, CT 06510
| | - Sjoerd J. Finnema
- Department of Radiology and Biomedical Imaging, Yale University School of Medicine, 801 Howard Ave, New Haven, CT 06519
| | - Yiyun Huang
- Department of Radiology and Biomedical Imaging, Yale University School of Medicine, 801 Howard Ave, New Haven, CT 06519
| | - Richard E. Carson
- Department of Radiology and Biomedical Imaging, Yale University School of Medicine, 801 Howard Ave, New Haven, CT 06519
| | - Robert T. Malison
- Department of Psychiatry, Yale University School of Medicine, 300 George Street, Suite # 901, New Haven, CT 06511
- Connecticut Mental Health Center, 34 Park Street, New Haven, CT 06519
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16
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Poisson CL, Engel L, Saunders BT. Dopamine Circuit Mechanisms of Addiction-Like Behaviors. Front Neural Circuits 2021; 15:752420. [PMID: 34858143 PMCID: PMC8631198 DOI: 10.3389/fncir.2021.752420] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 10/08/2021] [Indexed: 12/16/2022] Open
Abstract
Addiction is a complex disease that impacts millions of people around the world. Clinically, addiction is formalized as substance use disorder (SUD), with three primary symptom categories: exaggerated substance use, social or lifestyle impairment, and risky substance use. Considerable efforts have been made to model features of these criteria in non-human animal research subjects, for insight into the underlying neurobiological mechanisms. Here we review evidence from rodent models of SUD-inspired criteria, focusing on the role of the striatal dopamine system. We identify distinct mesostriatal and nigrostriatal dopamine circuit functions in behavioral outcomes that are relevant to addictions and SUDs. This work suggests that striatal dopamine is essential for not only positive symptom features of SUDs, such as elevated intake and craving, but also for impairments in decision making that underlie compulsive behavior, reduced sociality, and risk taking. Understanding the functional heterogeneity of the dopamine system and related networks can offer insight into this complex symptomatology and may lead to more targeted treatments.
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Affiliation(s)
- Carli L. Poisson
- Department of Neuroscience, University of Minnesota, Minneapolis, MN, United States
- Medical Discovery Team on Addiction, University of Minnesota, Minneapolis, MN, United States
- Graduate Program in Neuroscience, University of Minnesota, Minneapolis, MN, United States
| | - Liv Engel
- Department of Neuroscience, University of Minnesota, Minneapolis, MN, United States
- Medical Discovery Team on Addiction, University of Minnesota, Minneapolis, MN, United States
| | - Benjamin T. Saunders
- Department of Neuroscience, University of Minnesota, Minneapolis, MN, United States
- Medical Discovery Team on Addiction, University of Minnesota, Minneapolis, MN, United States
- Graduate Program in Neuroscience, University of Minnesota, Minneapolis, MN, United States
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17
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Zeng J, Yu S, Cao H, Su Y, Dong Z, Yang X. Neurobiological correlates of cue-reactivity in alcohol-use disorders: A voxel-wise meta-analysis of fMRI studies. Neurosci Biobehav Rev 2021; 128:294-310. [PMID: 34171325 DOI: 10.1016/j.neubiorev.2021.06.031] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 05/31/2021] [Accepted: 06/19/2021] [Indexed: 02/08/2023]
Abstract
Altered brain responses to alcohol-associated stimuli are a neural hallmark of alcohol-use disorder (AUD) and a promising target for pharmacotherapy. However, findings in cue-reactivity based functional MRI (fMRI) studies are inconclusive. To investigate the neural substrates of cue-reactivity and their relevance to treatment outcomes, alcohol craving and relapse in AUD patients, we performed five meta-analyses using signed differential mapping software. Our meta-analysis revealed that alcohol cues evoke greater cue-reactivity than neutral cues in the mesocorticolimbic circuit and lower reactivity in the parietal and temporal regions in AUD patients. Compared to controls, AUD individuals displayed hyperactivations in the medial prefrontal cortex and anterior/middle part of the cingulate cortex. After receiving AUD treatment, AUD patients exhibited greater activations in the precentral gyrus but reduced activations in the bilateral caudate nucleus, insula, right DLPFC, and left superior frontal gyrus. No significant results were found in cue-reactivity correlates of alcohol craving and relapse. Our results implicate cue-induced abnormalities in corticostriatal-limbic circuits may underline the pathophysiology of AUD, and have translational value for treatment development.
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Affiliation(s)
- Jianguang Zeng
- School of Economics and Business Administration, Chongqing University, Chongqing, 400044, China
| | - Shuxian Yu
- School of Economics and Business Administration, Chongqing University, Chongqing, 400044, China
| | - Hengyi Cao
- Center for Psychiatric Neuroscience, Feinstein Institute for Medical Research, Hempstead, NY, USA; Division of Psychiatry Research, Zucker Hillside Hospital, Glen Oaks, NY, USA
| | - Yueyue Su
- School of Public Policy and Administration, Chongqing University, Chongqing, 400044, China
| | - Zaiquan Dong
- Department of Psychiatry, State Key Lab of Biotherapy, West China Hospital of Sichuan University, Chengdu, 610041, China
| | - Xun Yang
- School of Public Policy and Administration, Chongqing University, Chongqing, 400044, China.
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18
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Jones JA, Zuhlsdorff K, Dalley JW. Neurochemical substrates linked to impulsive and compulsive phenotypes in addiction: A preclinical perspective. J Neurochem 2021; 157:1525-1546. [PMID: 33931861 DOI: 10.1111/jnc.15380] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 04/24/2021] [Accepted: 04/25/2021] [Indexed: 01/18/2023]
Abstract
Drug compulsion manifests in some but not all individuals and implicates multifaceted processes including failures in top-down cognitive control as drivers for the hazardous pursuit of drug use in some individuals. As a closely related construct, impulsivity encompasses rash or risky behaviour without foresight and underlies most forms of drug taking behaviour, including drug use during adverse emotional states (i.e., negative urgency). While impulsive behavioural dimensions emerge from drug-induced brain plasticity, burgeoning evidence suggests that impulsivity also predates the emergence of compulsive drug use. Although the neural substrates underlying the apparently causal relationship between trait impulsivity and drug compulsion are poorly understood, significant advances have come from the interrogation of defined limbic cortico-striatal circuits involved in motivated behaviour and response inhibition, together with chemical neuromodulatory influences from the ascending neurotransmitter systems. We review what is presently known about the neurochemical mediation of impulsivity, in its various forms, and ask whether commonalities exist in the neurochemistry of compulsive drug-motivated behaviours that might explain individual risk for addiction.
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Affiliation(s)
- Jolyon A Jones
- Department of Psychology, University of Cambridge, Cambridge, UK
| | | | - Jeffrey W Dalley
- Department of Psychology, University of Cambridge, Cambridge, UK.,Department of Psychiatry, Hershel Smith Building for Brain and Mind Sciences, Cambridge, UK
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19
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Abstract
Drug addiction is a chronic relapsing disorder, and a significant amount of research has been devoted to understand the factors that contribute to the development, loss of control, and persistence of compulsive addictive behaviors. In this review, we provide an overview of various theories of addiction to drugs of abuse and the neurobiology involved in elements of the addiction cycle. Specific focus is devoted to the role of the mesolimbic pathway in acute drug reinforcement and occasional drug use, the role of the mesocortical pathway and associated areas (e.g., the dorsal striatum) in escalation/dependence, and the contribution of these pathways and associated circuits to conditioned responses, drug craving, and loss of behavioral control that may underlie drug relapse. By enhancing the understanding of the neurobiological factors that mediate drug addiction, continued preclinical and clinical research will aid in the development of novel therapeutic interventions that can serve as effective long-term treatment strategies for drug-dependent individuals.
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Affiliation(s)
- Matthew W Feltenstein
- Department of Neuroscience, Medical University of South Carolina, Charleston, South Carolina 29425, USA
| | - Ronald E See
- Department of Neuroscience, Medical University of South Carolina, Charleston, South Carolina 29425, USA
- Department of Psychology, Westmont College, Santa Barbara, California 93108, USA
| | - Rita A Fuchs
- Integrative Physiology and Neuroscience, Washington State University College of Veterinary Medicine, Pullman, Washington 99164-7620, USA
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20
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Abstract
Addiction is a disease characterized by compulsive drug seeking and consumption observed in 20-30% of users. An addicted individual will favor drug reward over natural rewards, despite major negative consequences. Mechanistic research on rodents modeling core components of the disease has identified altered synaptic transmission as the functional substrate of pathological behavior. While the initial version of a circuit model for addiction focused on early drug adaptive behaviors observed in all individuals, it fell short of accounting for the stochastic nature of the transition to compulsion. The model builds on the initial pharmacological effect common to all addictive drugs-an increase in dopamine levels in the mesolimbic system. Here, we consolidate this early model by integrating circuits underlying compulsion and negative reinforcement. We discuss the genetic and epigenetic correlates of individual vulnerability. Many recent data converge on a gain-of-function explanation for circuit remodeling, revealing blueprints for novel addiction therapies.
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Affiliation(s)
- Christian Lüscher
- Department of Basic Neurosciences, Faculty of Medicine, University of Geneva, CH-1211 Geneva, Switzerland; .,Clinic of Neurology, Department of Clinical Neurosciences, Geneva University Hospital, CH-1211 Geneva, Switzerland
| | - Patricia H Janak
- Department of Psychological and Brain Sciences, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, Maryland 21218, USA.,The Solomon H. Snyder Department of Neuroscience, Johns Hopkins School of Medicine, Baltimore, Maryland 21205, USA
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21
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Jain S, Dhawan A, Kumaran SS, Deep R, Jain R. BOLD activation during cue induced craving in adolescent inhalant users. Asian J Psychiatr 2020; 52:102097. [PMID: 32454423 DOI: 10.1016/j.ajp.2020.102097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 04/02/2020] [Accepted: 04/07/2020] [Indexed: 10/24/2022]
Abstract
Inhalants are legally available substances, most of them inexpensive, which are often abused by adolescents. Craving causes their continued use and repeated relapses. There is a need to understand the cue-induced craving and the associated neural mechanisms. In absence of any such prior study, the present study compared the hemodynamic changes in brain associated with craving effect in adolescent inhalant users and healthy controls using blood oxygen level dependent (BOLD) mechanism. This was an observational case control study with twelve adolescents, aged 12-18 years, with current use of inhalants as their primary drug, and twelve healthy, age and gender-matched adolescents, with no lifetime use of inhalants. Clinical assessments included Teen Addiction Severity Index and Visual Analogue Scale for craving. Participants abstained from all substances during 48 h prior to fMRI, confirmed by urinalysis. A validated visual cue block paradigm with neutral and craving cues was presented during the BOLD assessments in a 3 T MR system. The inhalant users exhibited BOLD activation in inferior frontal gyrus, inferior parietal lobule, superior occipital gyrus, cingulate gyrus, lentiform nucleus, thalamus, and culmen as compared to control group. The control group exhibited activation of insula as compared to cases. The results may be attributed to visuo-spatial attention, visual perception, working memory, and motivation associated with visual cue reactivity. This preliminary study provides important findings pertaining to activation patterns in response to cue-induced craving among adolescent inhalant users.
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Affiliation(s)
- Shobhit Jain
- Department of Psychiatry, Heritage Institute of Medical Sciences (HIMS), Varanasi, India.
| | - Anju Dhawan
- National Drug Dependence Treatment Center (NDDTC) Department of Psychiatry All India Institute of Medical Sciences (AIIMS), New Delhi, 110029, India.
| | - S Senthil Kumaran
- Department of NMR and MRI Facility All India Institute of Medical Sciences (AIIMS), New Delhi, India.
| | - Raman Deep
- Department of Psychiatry All India Institute of Medical Sciences (AIIMS), New Delhi, India.
| | - Raka Jain
- National Drug Dependence Treatment Centre (NDDTC) All India Institute of Medical Sciences (AIIMS), New Delhi, India.
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22
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Double dissociation between actions of dopamine D1 and D2 receptors of the ventral and dorsolateral striatum to produce reinstatement of cocaine seeking behavior. Neuropharmacology 2020; 172:108113. [PMID: 32335152 DOI: 10.1016/j.neuropharm.2020.108113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 04/16/2020] [Accepted: 04/17/2020] [Indexed: 11/22/2022]
Abstract
One of the hallmarks of addiction is the enduring vulnerability to relapse. Following repeated use, cocaine (COC) induces neuroadaptations within the dopamine (DA) system, arguably underlying several aspects of COC-seeking behavior. Peripheral stimulation of D2, but not D1, receptors induces relapse. However, where in the brain these effects occur is still matter of debate. The D1 and D2 receptors (D1R; D2R) are highly expressed in the nucleus accumbens (NAcc) and the dorsolateral striatum (DLS), but their specific involvement in the reinstatement of COC-seeking remains elusive. We assessed the reinstating effects of intracerebral infusions of agonists of D1R (SKF82958) or D2R (quinelorane) within the NAcc or DLS of rats after extinction of COC self-administration (COC SA). To assess whether we could block peripheral D2 agonist (quinelorane) induced reinstatement, we simultaneously infused either a D1R (SCH23390) or a D2R (raclopride) antagonist within the NAcc or DLS. When infused into the NAcc, but not into the DLS, SKF82958 induced reinstatement of COC-seeking; conversely, quinelorane had no effect when injected into the NAcc, but induced reinstatement when infused into the DLS while the D1R agonist has no effect. While administration of raclopride into the NAcc or DLS impedes the reinstating effect of a systemic quinelorane injection, the infusion of SCH23390 into the NAcc or DLS surprisingly, blocks the reinstatement induced by the peripheral D2R stimulation. Our results point to a double dissociation between D1R and D2R of the NAcc and DLS, highlighting their complex interactions within both structures, in the reinstatement of COC-seeking behavior.
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Molokotos E, Peechatka AL, Wang KS, Pizzagalli DA, Janes AC. Caudate reactivity to smoking cues is associated with increased responding to monetary reward in nicotine-dependent individuals. Drug Alcohol Depend 2020; 209:107951. [PMID: 32145666 PMCID: PMC7127934 DOI: 10.1016/j.drugalcdep.2020.107951] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 02/25/2020] [Accepted: 02/26/2020] [Indexed: 01/20/2023]
Abstract
Quitting smoking is challenging in part because environmental smoking cues can trigger the desire to smoke. Neurobiological responses to smoking cues are often observed in reward-related brain regions such as the caudate and nucleus accumbens (NAc). While reward plays a well-established role in the formation of cue reactivity, whether general reward responsiveness contributes to individual differences in cue-reactivity among chronic smokers is unclear; establishing such link could provide insight into the mechanisms maintaining cue reactivity. The current study explored this relationship by assessing smoking cue reactivity during functional magnetic imaging followed by an out-of-scanner probabilistic reward task (PRT) in 24 nicotine-dependent smokers (14 women). In addition, owing to sex differences in cue reactivity and reward function, this same relationship was examined as a function of sex. Following recent smoking, greater reward responsiveness on the PRT was associated with enhanced left caudate reactivity to smoking cues. No relationship was found in any other striatal subregion. The positive relationship between reward responsiveness and caudate smoking cue reactivity was significant only in male smokers, fitting with the idea that males and females respond to the reinforcing elements of smoking cues differently. These findings are clinically relevant as they show that, following recent smoking, nicotine-dependent individuals who are more cue reactive are also more likely to be responsive to non-drug rewards, which may be useful for making individualized treatment decisions that involve behavioral reward contingencies.
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Affiliation(s)
- Elena Molokotos
- McLean Hospital, Belmont, MA, USA; Department of Psychology, Suffolk University, Boston, MA, USA.
| | | | - Kainan S. Wang
- McLean Hospital, Belmont, MA, USA,Harvard Medical School, Boston, MA, USA
| | | | - Amy C. Janes
- McLean Hospital, Belmont, MA, USA,Harvard Medical School, Boston, MA, USA
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24
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Matt SM, Gaskill PJ. Where Is Dopamine and how do Immune Cells See it?: Dopamine-Mediated Immune Cell Function in Health and Disease. J Neuroimmune Pharmacol 2020; 15:114-164. [PMID: 31077015 PMCID: PMC6842680 DOI: 10.1007/s11481-019-09851-4] [Citation(s) in RCA: 132] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 04/07/2019] [Indexed: 02/07/2023]
Abstract
Dopamine is well recognized as a neurotransmitter in the brain, and regulates critical functions in a variety of peripheral systems. Growing research has also shown that dopamine acts as an important regulator of immune function. Many immune cells express dopamine receptors and other dopamine related proteins, enabling them to actively respond to dopamine and suggesting that dopaminergic immunoregulation is an important part of proper immune function. A detailed understanding of the physiological concentrations of dopamine in specific regions of the human body, particularly in peripheral systems, is critical to the development of hypotheses and experiments examining the effects of physiologically relevant dopamine concentrations on immune cells. Unfortunately, the dopamine concentrations to which these immune cells would be exposed in different anatomical regions are not clear. To address this issue, this comprehensive review details the current information regarding concentrations of dopamine found in both the central nervous system and in many regions of the periphery. In addition, we discuss the immune cells present in each region, and how these could interact with dopamine in each compartment described. Finally, the review briefly addresses how changes in these dopamine concentrations could influence immune cell dysfunction in several disease states including Parkinson's disease, multiple sclerosis, rheumatoid arthritis, inflammatory bowel disease, as well as the collection of pathologies, cognitive and motor symptoms associated with HIV infection in the central nervous system, known as NeuroHIV. These data will improve our understanding of the interactions between the dopaminergic and immune systems during both homeostatic function and in disease, clarify the effects of existing dopaminergic drugs and promote the creation of new therapeutic strategies based on manipulating immune function through dopaminergic signaling. Graphical Abstract.
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Affiliation(s)
- S M Matt
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, PA, 19102, USA
| | - P J Gaskill
- Department of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, PA, 19102, USA.
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25
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Chen S, Huang S, Yang C, Cai W, Chen H, Hao W, Liu T, Wang X, Worhunsky PD, Potenza MN. Neurofunctional Differences Related to Methamphetamine and Sexual Cues in Men With Shorter and Longer Term Abstinence Methamphetamine Dependence. Int J Neuropsychopharmacol 2019; 23:135-145. [PMID: 31995187 PMCID: PMC7171928 DOI: 10.1093/ijnp/pyz069] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 12/02/2019] [Accepted: 12/20/2019] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Stimulant use and sexual behaviors have been linked in behavioral and epidemiological studies. Although methamphetamine-related neurofunctional differences have been investigated, few studies have examined neural responses to drug and sexual cues with respect to shorter or longer term methamphetamine abstinence in individuals with methamphetamine dependence. METHODS Forty-nine men with shorter term methamphetamine abstinence, 50 men with longer term methamphetamine abstinence, and 47 non-drug-using healthy comparison men completed a functional magnetic resonance imaging cue-reactivity task consisting of methamphetamine, sexual, and neutral visual cues. RESULTS Region-of-interest analyses revealed greater methamphetamine cue-related activation in shorter term methamphetamine abstinence and longer term methamphetamine abstinence individuals relative to healthy comparison men in the ventromedial prefrontal cortex. A significant interaction of group and condition in the anterior insula was found. Relative to healthy comparison participants, both shorter term methamphetamine abstinence and longer term methamphetamine abstinence groups displayed greater sexual cue-related anterior insula activation relative to methamphetamine cues and neutral cues, but there were no differences between shorter term methamphetamine abstinence and longer term methamphetamine abstinence groups in anterior insula responses. Subsequent whole-brain analyses indicated a group-by-condition interaction with longer term methamphetamine abstinence participants showing greater sexual-related activation in the left superior frontal cortex relative to healthy comparison men. Shorter term methamphetamine abstinence participants showed greater superior frontal cortex activation to sexual relative to neutral cues, and longer term methamphetamine abstinence participants showed greater superior frontal cortex activation to sexual relative to neutral and methamphetamine cues. CONCLUSIONS The findings suggest that abstinence from methamphetamine may alter how individuals respond to drug and sexual cues and thus may influence drug use and sexual behaviors. Given the use of methamphetamine for sexual purposes and responses to natural vs drug rewards for addiction recovery, the findings may have particular clinical relevance.
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Affiliation(s)
- Shubao Chen
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China,Chinese National Clinical Research Center on Mental Disorders (Xiangya), Changsha, Hunan, China,Chinese National Technology Institute on Mental Disorders, Changsha, Hunan, China,Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan, China,Mental Health Institute of Central South University, Changsha, Hunan, China,Department of Psychiatry, Yale School of Medicine, New Haven, CT
| | - Shucai Huang
- Department of Psychiatry, The Fourth People’s Hospital of Wuhu, Wuhu, Anhui, China
| | - Cheng Yang
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China,Chinese National Clinical Research Center on Mental Disorders (Xiangya), Changsha, Hunan, China,Chinese National Technology Institute on Mental Disorders, Changsha, Hunan, China,Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan, China,Mental Health Institute of Central South University, Changsha, Hunan, China
| | - Weifu Cai
- Department of Psychiatry, People’s Hospital of Zhuhai, Zhuhai, Guangzhou, China
| | - Hongxian Chen
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China,Chinese National Clinical Research Center on Mental Disorders (Xiangya), Changsha, Hunan, China,Chinese National Technology Institute on Mental Disorders, Changsha, Hunan, China,Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan, China,Mental Health Institute of Central South University, Changsha, Hunan, China
| | - Wei Hao
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China,Chinese National Clinical Research Center on Mental Disorders (Xiangya), Changsha, Hunan, China,Chinese National Technology Institute on Mental Disorders, Changsha, Hunan, China,Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan, China,Mental Health Institute of Central South University, Changsha, Hunan, China
| | - Tieqiao Liu
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China,Chinese National Clinical Research Center on Mental Disorders (Xiangya), Changsha, Hunan, China,Chinese National Technology Institute on Mental Disorders, Changsha, Hunan, China,Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan, China,Mental Health Institute of Central South University, Changsha, Hunan, China,Correspondence: Xuyi Wang, MD, PhD, The Second Xiangya Hospital, Central South University, No. 139, Renmin Middle Road, Changsha 410011, Hunan, China () and Tieqiao Liu, MD, PhD, The Second Xiangya Hospital, Central South University, No. 139, Renmin Middle Road, Changsha 410011, Hunan, China ()
| | - Xuyi Wang
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China,Chinese National Clinical Research Center on Mental Disorders (Xiangya), Changsha, Hunan, China,Chinese National Technology Institute on Mental Disorders, Changsha, Hunan, China,Hunan Key Laboratory of Psychiatry and Mental Health, Changsha, Hunan, China,Mental Health Institute of Central South University, Changsha, Hunan, China,Correspondence: Xuyi Wang, MD, PhD, The Second Xiangya Hospital, Central South University, No. 139, Renmin Middle Road, Changsha 410011, Hunan, China () and Tieqiao Liu, MD, PhD, The Second Xiangya Hospital, Central South University, No. 139, Renmin Middle Road, Changsha 410011, Hunan, China ()
| | | | - Marc N Potenza
- Department of Psychiatry, Yale School of Medicine, New Haven, CT,Connecticut Mental Health Center, New Haven, CT,Connecticut Council on Problem Gambling, Wethersfield, CT,Department of Neuroscience, and Child Study Center, Yale School of Medicine, New Haven, CT
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Shi JJ, Cao DN, Liu HF, Wang ZY, Lu GY, Wu N, Zhou WH, Li J. Dorsolateral striatal miR-134 modulates excessive methamphetamine intake in self-administering rats. Metab Brain Dis 2019; 34:1029-1041. [PMID: 31152340 DOI: 10.1007/s11011-019-00430-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Accepted: 05/10/2019] [Indexed: 10/26/2022]
Abstract
Increasing evidence indicates that excessive drug consumption is sufficient for the transition from recreational and controlled drug use to uncontrolled use and addiction. However, the underlying mechanisms are debated. Some neurobehavioral and neuroimaging evidence indicates that dorsolateral striatum (dlStr)-dependent habit learning plays a key role in excessive drug intake and the transition to addiction, but little is known about the molecular events. The present study investigated whether dlStr miR-134, an important regulator of synaptic transmission and plasticity, is involved in excessive methamphetamine intake. We established excessive and uncontrolled methamphetamine self-administration model in rats by permitting animals extended access to drug (6 h/session/d, LgA group), whereas animals that were limited to access to drug (2 h/session/d, ShA group) exhibited low and controlled self-administration. miR-134 expression in dlStr was significantly increased and its target LIMK1 expression was decreased in the LgA group, but not in the ShA group, compared with the saline control group. However, passive methamphetamine exposure did not alter miR-134 and LIMK1 levels in dlStr. We also found that down-regulation of miR-134 in dlStr through local microinjection of a lentivirus carrying miR-134 sponge (LV-miR-134-Sil) significantly reduced methamphetamine infusions and excessive consumption in LgA group, rather than ShA group. These results indicated that dlStr miR-134, perhaps via its target LIMK1, contributed to excessive and uncontrolled methamphetamine intake, supporting the hypothesis that stimulus-response habit formation is an important mechanism underlying the transition from controlled drug use to uncontrolled drug use and addiction.
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Affiliation(s)
- Jing-Jing Shi
- Beijing Key Laboratory of Neuropsychopharmacology, State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China
| | - Dan-Ni Cao
- Beijing Key Laboratory of Neuropsychopharmacology, State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China
| | - Hui-Fen Liu
- Laboratory of Behavioral Neuroscience, Ningbo Addiction Research and Treatment Center, School of Medicine, Ningbo University, 42th Xibei Str, Ningbo, 315010, People's Republic of China
| | - Zhi-Yuan Wang
- Beijing Key Laboratory of Neuropsychopharmacology, State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China
| | - Guan-Yi Lu
- Beijing Key Laboratory of Neuropsychopharmacology, State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China
| | - Ning Wu
- Beijing Key Laboratory of Neuropsychopharmacology, State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China.
| | - Wen-Hua Zhou
- Laboratory of Behavioral Neuroscience, Ningbo Addiction Research and Treatment Center, School of Medicine, Ningbo University, 42th Xibei Str, Ningbo, 315010, People's Republic of China
| | - Jin Li
- Beijing Key Laboratory of Neuropsychopharmacology, State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, 27th Taiping Road, Beijing, 100850, China.
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27
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Laukkanen V, Kärkkäinen O, Kautiainen H, Tiihonen J, Storvik M. Increased [³H]quisqualic acid binding density in the dorsal striatum and anterior insula of alcoholics: A post-mortem whole-hemisphere autoradiography study. Psychiatry Res Neuroimaging 2019; 287:63-69. [PMID: 30991250 DOI: 10.1016/j.pscychresns.2019.04.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Revised: 04/05/2019] [Accepted: 04/07/2019] [Indexed: 01/28/2023]
Abstract
The function of group I metabotropic glutamate receptors mGluR1 and mGluR5 is involved in the hyperglutamatergic state caused by chronic alcohol. Preclinical studies suggest that group I mGluR modulation could serve as a novel treatment of alcoholism. Considering the wide role of glutamatergic neurochemistry in addiction, group I mGluR binding was studied in brain areas involved in decision-making, learning and memory. Post-mortem whole hemisphere autoradiography was used to study the binding density of [³H]quisqualic acid, a potent group I mGluR agonist, in 9 Cloninger type 1 alcoholics, 8 Cloninger type 2 alcoholics and 10 controls. Binding was studied in the dorsal striatum, hippocampus and cortex. Alcoholics displayed a trend towards increased [³H]quisqualic acid binding in all brain areas. The most robust findings were in the putamen (p = 0.006) and anterior insula (p = 0.005), where both alcoholic subtypes displayed increased binding compared to the controls. These findings suggest altered group I mGluR function in alcoholic subjects in the dorsal striatum, which is involved in habitual learning, and in the anterior insula, which has a pivotal role in the perception of bodily sensations. Increased [³H]quisqualic acid binding might suggest a beneficial impact of mGluR1/5 modulators in the treatment of alcoholism.
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Affiliation(s)
- Virpi Laukkanen
- Department of Forensic Psychiatry, University of Eastern Finland, Niuvanniemi Hospital, Niuvankuja 65, FI-70240 Kuopio, Finland; Department of Psychiatry, Kuopio University Hospital, P.O. Box 100, FI-70029 Kuopio, Finland.
| | - Olli Kärkkäinen
- Department of Pharmacology and Toxicology, University of Eastern Finland, P.O. Box 1627, FI-70211 Kuopio, Finland
| | - Hannu Kautiainen
- Unit of Primary Health Care, Helsinki University Central Hospital, P.O. Box 705, FI-00029 HUS, Helsinki, Finland; Department of General Practice, Helsinki University, P.O. Box 20, FI-00014 Helsinki, Finland
| | - Jari Tiihonen
- Department of Forensic Psychiatry, University of Eastern Finland, Niuvanniemi Hospital, Niuvankuja 65, FI-70240 Kuopio, Finland; Department of Clinical Neuroscience, Karolinska Institutet, Karolinska Hospital, 17176 Stockholm, Sweden
| | - Markus Storvik
- Department of Psychiatry, Kuopio University Hospital, P.O. Box 100, FI-70029 Kuopio, Finland
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Fouyssac M, Belin D. Beyond drug-induced alteration of glutamate homeostasis, astrocytes may contribute to dopamine-dependent intrastriatal functional shifts that underlie the development of drug addiction: A working hypothesis. Eur J Neurosci 2019; 50:3014-3027. [PMID: 30968489 PMCID: PMC6852203 DOI: 10.1111/ejn.14416] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 03/18/2019] [Accepted: 03/26/2019] [Indexed: 12/30/2022]
Abstract
The transition from recreational drug use to compulsive drug‐seeking habits, the hallmark of addiction, has been shown to depend on a shift in the locus of control over behaviour from the ventral to the dorsolateral striatum. This process has hitherto been considered to depend on the aberrant engagement of dopamine‐dependent plasticity processes within neuronal networks. However, exposure to drugs of abuse also triggers cellular and molecular adaptations in astrocytes within the striatum which could potentially contribute to the intrastriatal transitions observed during the development of drug addiction. Pharmacological interventions aiming to restore the astrocytic mechanisms responsible for maintaining homeostatic glutamate concentrations in the nucleus accumbens, that are altered by chronic exposure to addictive drugs, abolish the propensity to relapse in both preclinical and, to a lesser extent, clinical studies. Exposure to drugs of abuse also alters the function of astrocytes in the dorsolateral striatum, wherein dopaminergic mechanisms control drug‐seeking habits, associated compulsivity and relapse. This suggests that drug‐induced alterations in the glutamatergic homeostasis maintained by astrocytes throughout the entire striatum may interact with dopaminergic mechanisms to promote aberrant plasticity processes that contribute to the maintenance of maladaptive drug‐seeking habits. Capitalising on growing evidence that astrocytes play a fundamental regulatory role in glutamate and dopamine transmission in the striatum, we present an innovative model of a quadripartite synaptic microenvironment within which astrocytes channel functional interactions between the dopaminergic and glutamatergic systems that may represent the primary striatal functional unit that undergoes drug‐induced adaptations eventually leading to addiction.
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Affiliation(s)
- Maxime Fouyssac
- Department of Psychology, University of Cambridge, Cambridge, UK
| | - David Belin
- Department of Psychology, University of Cambridge, Cambridge, UK
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29
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Giuliano C, Belin D, Everitt BJ. Compulsive Alcohol Seeking Results from a Failure to Disengage Dorsolateral Striatal Control over Behavior. J Neurosci 2019; 39:1744-1754. [PMID: 30617206 PMCID: PMC6391574 DOI: 10.1523/jneurosci.2615-18.2018] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 11/29/2018] [Accepted: 12/19/2018] [Indexed: 12/20/2022] Open
Abstract
The acquisition of drug, including alcohol, use is associated with activation of the mesolimbic dopamine system. However, over the course of drug exposure the control over drug seeking progressively devolves to anterior dorsal striatum (aDLS) dopamine-dependent mechanisms. The causal importance of this functional recruitment of aDLS in the switch from controlled to compulsive drug use in vulnerable individuals remains to be established. Here we tested the hypothesis that individual differences in the susceptibility to aDLS dopamine-dependent control over alcohol seeking predicts and underlies the development of compulsive alcohol seeking. Male alcohol-preferring rats, the alcohol-preferring phenotype of which was confirmed in an intermittent two-bottle choice procedure, were implanted bilaterally with cannulae above the aDLS and trained instrumentally on a seeking-taking chained schedule of alcohol reinforcement until some individuals developed compulsive seeking behavior. The susceptibility to aDLS dopamine control over behavior was investigated before and after the development of compulsivity by measuring the extent to which bilateral aDLS infusions of the dopamine receptor antagonist α-flupenthixol (0, 5, 10, and 15 μg/side) decreased alcohol seeking at different stages of training, as follows: (1) after acquisition of instrumental taking responses for alcohol; (2) after alcohol-seeking behavior was well established; and (3) after the development of punishment-resistant alcohol seeking. Only alcohol-seeking, not alcohol-taking, responses became dependent on aDLS dopamine. Further, marked individual differences in the susceptibility of alcohol seeking to aDLS dopamine receptor blockade actually predicted the vulnerability to develop compulsive alcohol seeking, but only in subjects dependent on aDLS dopamine-dependent control.SIGNIFICANCE STATEMENT Over the course of addictive drug exposure, there is a transition in the control over drug seeking from ventral to anterior dorsal striatum (aDLS) dopamine-dependent mechanisms, but it is unclear whether this is causally involved in the development of compulsive drug seeking. We tested the hypothesis that individual differences in the reliance of alcohol seeking on aDLS dopamine predicts and underlies the emergence of compulsive alcohol seeking. We identified individual differences in the reliance of well established alcohol seeking, but not taking behavior, on aDLS mechanisms and also showed that this predicted the subsequent development of compulsive alcohol-seeking behavior. Thus, those individuals in whom alcohol seeking depended on aDLS mechanisms were vulnerable subsequently to display compulsivity.
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Affiliation(s)
- Chiara Giuliano
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Cambridge CB2 3EB, United Kingdom
| | - David Belin
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Cambridge CB2 3EB, United Kingdom
| | - Barry J Everitt
- Behavioural and Clinical Neuroscience Institute and Department of Psychology, University of Cambridge, Cambridge CB2 3EB, United Kingdom
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30
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Jeon SY, Kim YH, Kim SJ, Suh SK, Cha HJ. Abuse potential of 2-(4-iodo-2, 5-dimethoxyphenyl)N-(2-methoxybenzyl)ethanamine (25INBOMe); in vivo and ex vivo approaches. Neurochem Int 2019; 125:74-81. [PMID: 30769030 DOI: 10.1016/j.neuint.2019.02.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 01/10/2019] [Accepted: 02/12/2019] [Indexed: 01/08/2023]
Abstract
25INBOMe ("25-I", "N-Bomb"), one of new psychoactive substances (NPSs), is being abused for recreational purpose. However, the liability for abuse or dependence has not been systematically studied yet. The objective of the present study was to evaluate rewarding and reinforcing effects of 25INBOMe using conditioned place preference (CPP) and self-administration (SA) paradigms. In addition, ultrasonic vocalizations (USVs) were measured to investigate relationships between USVs and emotional state regarding dependence on psychoactive substances. To understand molecular mechanism involved in its action, dopamine (DA) level changes were analyzed using synaptosomes extracted from the striatal region of the brain. Expression level changes of SGK1 (serum/glucocorticoid regulated kinase 1) and PER2 (period circadian protein homolog 2), two putative biomarkers for drug dependence, were also analyzed. Results showed that 25INBOMe increased both CPP (0.3 mg/kg) and SA (0.03 mg/kg/infusion) and produced higher frequencies in USVs analysis. It also increased DA levels in the striatal region and changed expression levels of SGK1 and PER2. Results of the present study suggest that 25INBOMe might produce rewarding and reinforcing effects, indicating its dependence liability. In addition, frequencies of USV might be associated with emotional state of mice induced by psychoactive substances regarding substance dependence. This is the first systemic preclinical report on the dependence liability of 25INBOMe and the first attempt to introduce a possible relationship between USVs and emotional state of mice regarding substance dependency. Further studies are needed to clarify the mechanism involved in 25INBOMe dependency and determine the usefulness of USV measurement as a method for evaluating dependence liability.
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Affiliation(s)
- Seo Young Jeon
- National Institute of Drug and Safety Evaluation, Ministry of Food and Drug Safety, Osong, Cheongju, Republic of Korea
| | - Young-Hoon Kim
- National Institute of Drug and Safety Evaluation, Ministry of Food and Drug Safety, Osong, Cheongju, Republic of Korea
| | - Sung Jin Kim
- Cosmetics Policy Division, Ministry of Food and Drug Safety, Osong, Cheongju, Republic of Korea
| | - Soo Kyung Suh
- National Institute of Drug and Safety Evaluation, Ministry of Food and Drug Safety, Osong, Cheongju, Republic of Korea
| | - Hye Jin Cha
- National Institute of Drug and Safety Evaluation, Ministry of Food and Drug Safety, Osong, Cheongju, Republic of Korea.
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Sebold M, Spitta G, Gleich T, Dembler-Stamm T, Butler O, Zacharias K, Aydin S, Garbusow M, Rapp M, Schubert F, Buchert R, Gallinat J, Heinz A. Stressful life events are associated with striatal dopamine receptor availability in alcohol dependence. J Neural Transm (Vienna) 2019; 126:1127-1134. [DOI: 10.1007/s00702-019-01985-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 02/06/2019] [Indexed: 11/30/2022]
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Regional elevations in microglial activation and cerebral glucose utilization in frontal white matter tracts of rhesus monkeys following prolonged cocaine self-administration. Brain Struct Funct 2019; 224:1417-1428. [PMID: 30747315 DOI: 10.1007/s00429-019-01846-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 02/06/2019] [Indexed: 12/18/2022]
Abstract
It has been shown that exposure to cocaine can result in neuroinflammatory responses. Microglia, the resident CNS immune cells, undergo a transition to an activated state when challenged. In rodents, and possibly humans, cocaine exposure activates microglia. The goal of this study was to assess the extent and magnitude of microglial activation in rhesus monkeys with an extensive history of cocaine self-administration. Male rhesus monkeys (N = 4/group) were trained to respond on a fixed-interval 3-min schedule of food or 0.3 mg/kg/injection cocaine presentation (30 reinforcers/session) for 300 sessions. At the end of the final session, monkeys were administered 2-[14C]deoxyglucose intravenously and 45 min later euthanized. Brain sections were used for autoradiographic assessments of glucose utilization and for microglia activation with [3H]PK11195, a marker for the microglial 18-kDa translocator protein. There were no group differences in gray matter [3H]PK11195 binding, while binding was significantly greater in cocaine self-administration animals as compared to food controls in 8 of the 11 white matter tracts measured at the striatal level. Binding did not differ from control at other levels. There were also significant increases in white matter local cerebral glucose utilization at the striatal level, which were positively correlated with [3H]PK11195 binding. The present findings demonstrate an elevation in [3H]PK11195 binding in forebrain white matter tracts of nonhuman primates with a prolonged history of cocaine self-administration. These elevations were also associated with greater cerebral metabolic rates. These data suggest that white matter deficits may contribute to behavioral, motivational, and cognitive impairments observed in cocaine abusers.
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Smith RJ, Laiks LS. Behavioral and neural mechanisms underlying habitual and compulsive drug seeking. Prog Neuropsychopharmacol Biol Psychiatry 2018; 87:11-21. [PMID: 28887182 PMCID: PMC5837910 DOI: 10.1016/j.pnpbp.2017.09.003] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 07/24/2017] [Accepted: 09/03/2017] [Indexed: 01/31/2023]
Abstract
Addiction is characterized by compulsive drug use despite negative consequences. Here we review studies that indicate that compulsive drug use, and in particular punishment resistance in animal models of addiction, is related to impaired cortical control over habitual behavior. In humans and animals, instrumental behavior is supported by goal-directed and habitual systems that rely on distinct corticostriatal networks. Chronic exposure to addictive drugs or stress has been shown to bias instrumental response strategies toward habit learning, and impair prefrontal cortical (PFC) control over responding. Moreover, recent work has implicated prelimbic PFC hypofunction in the punishment resistance that has been observed in a subset of animals with an extended history of cocaine self-administration. This may be related to a broader role for prelimbic PFC in mediating adaptive responding and behavioral flexibility, including exerting goal-directed control over behavior. We hypothesize that impaired cortical control and reduced flexibility between habitual and goal-directed systems may be critically involved in the development of maladaptive, compulsive drug use.
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Affiliation(s)
- Rachel J. Smith
- Corresponding author at: 3474 TAMU, College Station, TX 77843
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Hearing M. Prefrontal-accumbens opioid plasticity: Implications for relapse and dependence. Pharmacol Res 2018; 139:158-165. [PMID: 30465850 DOI: 10.1016/j.phrs.2018.11.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 11/05/2018] [Accepted: 11/07/2018] [Indexed: 01/12/2023]
Abstract
In addiction, an individual's ability to inhibit drug seeking and drug taking is thought to reflect a pathological strengthening of drug-seeking behaviors or impairments in the capacity to control maladaptive behavior. These processes are not mutually exclusive and reflect drug-induced modifications within prefrontal cortical and nucleus accumbens circuits, however unlike psychostimulants such as cocaine, far less is known about the temporal, anatomical, and cellular dynamics of these changes. We discuss what is known regarding opioid-induced adaptations in intrinsic membrane physiology and pre-/postsynaptic neurotransmission in principle pyramidal and medium spiny neurons in the medial prefrontal cortex and nucleus accumbens from electrophysiological studies and explore how circuit specific adaptations may contribute to unique facets of opioid addiction.
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Affiliation(s)
- Matthew Hearing
- Department of Biomedical Sciences, Marquette University, Milwaukee, WI, 53233, USA.
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Pan N, Yang Y, Du X, Qi X, Du G, Zhang Y, Li X, Zhang Q. Brain Structures Associated with Internet Addiction Tendency in Adolescent Online Game Players. Front Psychiatry 2018; 9:67. [PMID: 29559931 PMCID: PMC5845632 DOI: 10.3389/fpsyt.2018.00067] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Accepted: 02/19/2018] [Indexed: 11/13/2022] Open
Abstract
With the development of the Internet, an increasing number of adolescents play online game excessively, which leads to adverse effects on individuals and society. Previous studies have demonstrated altered gray-matter volume (GMV) in individuals with Internet gaming disorder (IGD), but the relationship between the tendency to IGD and the GMV across whole brain is still unclear in adolescents. In the present study, anatomical imaging with high resolution was performed on 67 male adolescents who played online game; and Young's Internet addiction test (IAT) was conducted to test the tendency to IGD. FMRIB Software Library (FSL) was used to calculate the voxel-based correlations between the GMV and the IAT score after controlling for the age and years of education. The GMVs of the bilateral postcentral gyri (postCG), the bilateral precentral gyri (preCG), the right precuneus, the left posterior midcingulate cortex (pMCC), the left inferior parietal lobe (IPL), and the right middle frontal gyrus (MFG) were negatively correlated with the IAT score. The correlation still existed between the IAT score and the GMVs of the bilateral postCG, the left preCG, the left pMCC, and the right MFG after controlling for the total time of playing online game. When the participants were divided into two groups according to the IAT score, the GMVs of these IAT-related brain regions were lower in high IAT score subgroup (IAT score >50) than in low IAT score subgroup (IAT score ≤50). Our results suggested that the GMVs of brain regions involved in sensorimotor process and cognitive control were associated with the IGD tendency. These findings may lead to new targets for preventing and treating the IGD.
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Affiliation(s)
- Nannan Pan
- Department of Radiology and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin, China
| | - Yongxin Yang
- Department of Psychology, Linyi Fourth People's Hospital, Linyi, China
| | - Xin Du
- Department of Radiology and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin, China
| | - Xin Qi
- Department of Radiology and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin, China
| | - Guijin Du
- Department of Radiology, Linyi People's Hospital, Linyi, China
| | - Yang Zhang
- Department of Radiology and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin, China
| | - Xiaodong Li
- Department of Radiology, Linyi People's Hospital, Linyi, China
| | - Quan Zhang
- Department of Radiology and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin, China
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Siciliano CA, Karkhanis AN, Holleran KM, Melchior JR, Jones SR. Cross-Species Alterations in Synaptic Dopamine Regulation After Chronic Alcohol Exposure. Handb Exp Pharmacol 2018; 248:213-238. [PMID: 29675581 PMCID: PMC6195853 DOI: 10.1007/164_2018_106] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Alcohol use disorders are a leading public health concern, engendering enormous costs in terms of both economic loss and human suffering. These disorders are characterized by compulsive and excessive alcohol use, as well as negative affect and alcohol craving during abstinence. Extensive research has implicated the dopamine system in both the acute pharmacological effects of alcohol and the symptomology of alcohol use disorders that develop after extended alcohol use. Preclinical research has shed light on many mechanisms by which chronic alcohol exposure dysregulates the dopamine system. However, many of the findings are inconsistent across experimental parameters such as alcohol exposure length, route of administration, and model organism. We propose that the dopaminergic alterations driving the core symptomology of alcohol use disorders are likely to be relatively stable across experimental settings. Recent work has been aimed at using multiple model organisms (mouse, rat, monkey) across various alcohol exposure procedures to search for commonalities. Here, we review recent advances in our understanding of the effects of chronic alcohol use on the dopamine system by highlighting findings that are consistent across experimental setting and species.
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Affiliation(s)
- Cody A Siciliano
- The Picower Institute for Learning and Memory, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology (MIT), Cambridge, MA, USA
| | - Anushree N Karkhanis
- Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Katherine M Holleran
- Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - James R Melchior
- Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Sara R Jones
- Department of Physiology and Pharmacology, Wake Forest School of Medicine, Winston-Salem, NC, USA.
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Mas-Herrero E, Dagher A, Zatorre RJ. Modulating musical reward sensitivity up and down with transcranial magnetic stimulation. Nat Hum Behav 2017; 2:27-32. [PMID: 30980048 DOI: 10.1038/s41562-017-0241-z] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 10/12/2017] [Indexed: 01/24/2023]
Abstract
Humans have the unique capacity to experience pleasure from aesthetic stimuli, such as art and music. Recent neuroimaging findings with music have led to a model in which mesolimbic striatal circuits interact with cortical systems to generate expectancies leading to pleasure 1,2 . However, neuroimaging approaches are correlational. Here, we provide causal evidence for the model by combining transcranial magnetic stimulation over the left dorsolateral prefrontal cortex to directly modulate fronto-striatal function 3 bidirectionally together with measures of pleasure and motivation during music listening. Our results show that perceived pleasure, psychophysiological measures of emotional arousal, and the monetary value assigned to music, are all significantly increased by exciting fronto-striatal pathways, whereas inhibition of this system leads to decreases in all of these variables compared with sham stimulation. These findings support the hypothesis that fronto-striatal function causally mediates both the affective responses and motivational aspects of music-induced reward, and provide insights into how aesthetic responses emerge in the human brain.
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Affiliation(s)
- Ernest Mas-Herrero
- Montreal Neurological Institute, McGill University, Montreal, QC, Canada.,International Laboratory for Brain, Music, and Sound Research (BRAMS), Montreal, QC, Canada.,Centre for Research on Brain, Language and Music (CRBLM), Montreal, QC, Canada
| | - Alain Dagher
- Montreal Neurological Institute, McGill University, Montreal, QC, Canada
| | - Robert J Zatorre
- Montreal Neurological Institute, McGill University, Montreal, QC, Canada. .,International Laboratory for Brain, Music, and Sound Research (BRAMS), Montreal, QC, Canada. .,Centre for Research on Brain, Language and Music (CRBLM), Montreal, QC, Canada.
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Lin Y, Gu H, Jiang L, Xu W, Liu C, Li Y, Qian X, Li D, Li Z, Hu J, Zhang H, Guo W, Zhao Y, Cen X. Cocaine modifies brain lipidome in mice. Mol Cell Neurosci 2017; 85:29-44. [PMID: 28830718 DOI: 10.1016/j.mcn.2017.08.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 08/17/2017] [Accepted: 08/18/2017] [Indexed: 02/05/2023] Open
Abstract
Lipids are predominant components of the brain and key regulators for neural structure and function. The neuropsychopharmacological effect of cocaine has been intensively investigated; however, the impact of cocaine on brain lipid profiles is largely unknown. In this study, we used a LC-MS-based lipidomic approach to investigate the impact of cocaine on brain lipidome in two mouse models, cocaine-conditioned place preference (CPP) and hyperlocomotor models and the lipidome was profoundly modified in the nucleus accumbens (NAc) and striatum respectively. We comprehensively analyzed the lipids among 21 subclasses across 7 lipid classes and found that cocaine profoundly modified brain lipidome. Notably, the lipid metabolites significantly modified were sphingolipids and glycerophospholipids in the NAc, showing a decrease in ceramide and an increase in its up/downstream metabolites levels, and decrease lysophosphatidylcholine (LPC) and lysophosphoethanolamine (LPE) and increase phosphatidylcholine (PC) and phosphatidylethanolamines (PE) levels, respectively. Moreover, long and polyunsaturated fatty acid phospholipids were also markedly increased in the NAc. Our results show that cocaine can markedly modify brain lipidomic profiling. These findings reveal a link between the modified lipidome and psychopharmacological effect of cocaine, providing a new insight into the mechanism of cocaine addiction.
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Affiliation(s)
- Yiyun Lin
- National Chengdu Center for Safety Evaluation of Drugs, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China; State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China.
| | - Hui Gu
- National Chengdu Center for Safety Evaluation of Drugs, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China.
| | - Linhong Jiang
- National Chengdu Center for Safety Evaluation of Drugs, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China.
| | - Wei Xu
- National Chengdu Center for Safety Evaluation of Drugs, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China.
| | - Chunqi Liu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China.
| | - Yan Li
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China.
| | - Xinying Qian
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China.
| | - Dandan Li
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China.
| | - Zhuoling Li
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China.
| | - Jing Hu
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China.
| | - Huaqin Zhang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China.
| | - Wei Guo
- National Chengdu Center for Safety Evaluation of Drugs, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China; College of Pharmacy, Yantai University, Yantai 264000, China.
| | - Yinglan Zhao
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China.
| | - Xiaobo Cen
- National Chengdu Center for Safety Evaluation of Drugs, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for Biotherapy, Chengdu 610041, China.
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Gao P, de Munck JC, Limpens JHW, Vanderschuren LJMJ, Voorn P. A neuronal activation correlate in striatum and prefrontal cortex of prolonged cocaine intake. Brain Struct Funct 2017; 222:3453-3475. [PMID: 28393262 PMCID: PMC5676843 DOI: 10.1007/s00429-017-1412-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 03/22/2017] [Indexed: 01/05/2023]
Abstract
Maladaptive changes in the involvement of striatal and frontal cortical regions in drug use are thought to underlie the progression to habitual drug use and loss of cognitive control over drug intake that occur with accumulating drug experience. The present experiments focus on changes in neuronal activity in these regions associated with short-term (10 days) and long-term (60 days) self-administration of cocaine. Quantitative in situ hybridization for the immediate early gene Mkp1 was combined with statistical parametric mapping to assess the distribution of neuronal activity. We hypothesized that neuronal activity in striatum would increase in its dorsal part and that activity in frontal cortex would decrease with prolonged cocaine self-administration experience. Expression of Mkp1 was profoundly increased after cocaine self-administration, and the magnitude of this effect was greater after short-term compared to long-term self-administration. Increased neuronal activity was seen in both dorsal and ventral sectors of the striatum after 10 days exposure to cocaine. However, enhanced activity was restricted to dorsomedial and dorsocentral striatum after 60 days cocaine self-administration. In virtually all medial prefrontal and most orbitofrontal areas, increased expression of Mkp1 was observed after 10 days of cocaine taking, whereas after 60 days, enhanced expression was restricted to caudal parts of medial prefrontal and caudomedial parts of orbitofrontal cortex. Our data reveal functional changes in cellular activity in striatum and frontal cortex with increasing cocaine self-administration experience. These changes might reflect the neural processes that underlie the descent from recreational drug taking to compulsive cocaine use.
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Affiliation(s)
- Ping Gao
- Department of Anatomy and Neurosciences, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, The Netherlands
| | - Jan C de Munck
- Department of Physics and Medical Technology, VU University Medical Center, Amsterdam, The Netherlands
| | - Jules H W Limpens
- Department of Translational Neuroscience, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Louk J M J Vanderschuren
- Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Department of Animals in Science and Society, Utrecht University, Utrecht, The Netherlands
| | - Pieter Voorn
- Department of Anatomy and Neurosciences, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, The Netherlands.
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40
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Gao P, Limpens JHW, Spijker S, Vanderschuren LJMJ, Voorn P. Stable immediate early gene expression patterns in medial prefrontal cortex and striatum after long-term cocaine self-administration. Addict Biol 2017; 22:354-368. [PMID: 26598422 DOI: 10.1111/adb.12330] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 09/11/2015] [Accepted: 10/15/2015] [Indexed: 12/22/2022]
Abstract
The transition from casual to compulsive drug use is thought to occur as a consequence of repeated drug taking leading to neuroadaptive changes in brain circuitry involved in emotion and cognition. At the basis of such neuroadaptations lie changes in the expression of immediate early genes (IEGs) implicated in transcriptional regulation, synaptic plasticity and intracellular signalling. However, little is known about how IEG expression patterns change during long-term drug self-administration. The present study, therefore, compares the effects of 10 and 60-day self-administration of cocaine and sucrose on the expression of 17 IEGs in brain regions implicated in addictive behaviour, i.e. dorsal striatum, ventral striatum and medial prefrontal cortex (mPFC). Increased expression after cocaine self-administration was found for 6 IEGs in dorsal and ventral striatum (c-fos, Mkp1, Fosb/ΔFosb, Egr2, Egr4, and Arc) and 10 IEGs in mPFC (same 6 IEGs as in striatum, plus Bdnf, Homer1, Sgk1 and Rgs2). Five of these 10 IEGs (Egr2, Fosb/ΔFosb, Bdnf, Homer1 and Jun) and Trkb in mPFC were responsive to long-term sucrose self-administration. Importantly, no major differences were found between IEG expression patterns after 10 or 60 days of cocaine self-administration, except Fosb/ΔFosb in dorsal striatum and Egr2 in mPFC, whereas the amount of cocaine obtained per session was comparable for short-term and long-term self-administration. These steady changes in IEG expression are, therefore, associated with stable self-administration behaviour rather than the total amount of cocaine consumed. Thus, sustained impulses to IEG regulation during prolonged cocaine self-administration may evoke neuroplastic changes underlying compulsive drug use.
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Affiliation(s)
- Ping Gao
- Department of Anatomy and Neurosciences, Neuroscience Campus Amsterdam; VU University Medical Center; Amsterdam the Netherlands
| | - Jules H. W. Limpens
- Brain Center Rudolf Magnus, Department of Translational Neuroscience; University Medical Center Utrecht; Utrecht the Netherlands
| | - Sabine Spijker
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Neuroscience Campus Amsterdam; VU University Amsterdam; Amsterdam the Netherlands
| | - Louk J. M. J. Vanderschuren
- Brain Center Rudolf Magnus, Department of Translational Neuroscience; University Medical Center Utrecht; Utrecht the Netherlands
- Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine; Utrecht University; Utrecht the Netherlands
| | - Pieter Voorn
- Department of Anatomy and Neurosciences, Neuroscience Campus Amsterdam; VU University Medical Center; Amsterdam the Netherlands
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Abstract
Cannabis use affects cortico-striatal networks that are essential for producing movement. In this review, we summarize the literature on motor system dysfunction in cannabis users and provide a rationale for why motor learning should be considered an important area in cannabis research. A majority of studies have addressed cognitive impairments in cannabis users and some have focused on driving performance, motor impulsivity, and motor inhibition. Our review of the literature has found that cannabis use is associated with motor performance impairments; however, there is a gap in the literature regarding impairments in motor learning. The involvement of the cortico-striatal network in both cannabis addiction and movement also suggests potential avenues for treatment and rehabilitation via the motor system.
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Affiliation(s)
- Shikha Prashad
- Center for BrainHealth, School of Behavioral and Brain Sciences, The University of Texas at Dallas, 2200 West Mockingbird Lane, Dallas, TX 75235, USA
| | - Francesca M Filbey
- Center for BrainHealth, School of Behavioral and Brain Sciences, The University of Texas at Dallas, 2200 West Mockingbird Lane, Dallas, TX 75235, USA
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42
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Fouyssac M, Everitt BJ, Belin D. Cellular basis of the intrastriatal functional shifts that underlie the development of habits: relevance for drug addiction. Curr Opin Behav Sci 2017. [DOI: 10.1016/j.cobeha.2016.11.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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43
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Jordan CJ, Andersen SL. Sensitive periods of substance abuse: Early risk for the transition to dependence. Dev Cogn Neurosci 2016; 25:29-44. [PMID: 27840157 PMCID: PMC5410194 DOI: 10.1016/j.dcn.2016.10.004] [Citation(s) in RCA: 194] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 10/10/2016] [Indexed: 12/20/2022] Open
Abstract
Early substance use dramatically increases the risk of substance use disorder (SUD). Although many try drugs, only a small percentage transition to SUD. High reactivity of reward, habit, and stress systems increase risk. Identification of early risk enables targeted, preventative interventions for SUD. Prevention must start before the sensitive adolescent period to maximize resilience.
Early adolescent substance use dramatically increases the risk of lifelong substance use disorder (SUD). An adolescent sensitive period evolved to allow the development of risk-taking traits that aid in survival; today these may manifest as a vulnerability to drugs of abuse. Early substance use interferes with ongoing neurodevelopment to induce neurobiological changes that further augment SUD risk. Although many individuals use drugs recreationally, only a small percentage transition to SUD. Current theories on the etiology of addiction can lend insights into the risk factors that increase vulnerability from early recreational use to addiction. Building on the work of others, we suggest individual risk for SUD emerges from an immature PFC combined with hyper-reactivity of reward salience, habit, and stress systems. Early identification of risk factors is critical to reducing the occurrence of SUD. We suggest preventative interventions for SUD that can be either tailored to individual risk profiles and/or implemented broadly, prior to the sensitive adolescent period, to maximize resilience to developing substance dependence. Recommendations for future research include a focus on the juvenile and adolescent periods as well as on sex differences to better understand early risk and identify the most efficacious preventions for SUD.
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Affiliation(s)
- Chloe J Jordan
- Department of Psychiatry, Mclean Hospital/Harvard Medical School, Belmont, MA 02478, United States.
| | - Susan L Andersen
- Department of Psychiatry, Mclean Hospital/Harvard Medical School, Belmont, MA 02478, United States
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Wang S, Kim S, Cosgrove KP, Morris ED. A framework for designing dynamic lp-ntPET studies to maximize the sensitivity to transient neurotransmitter responses to drugs: Application to dopamine and smoking. Neuroimage 2016; 146:701-714. [PMID: 27743899 DOI: 10.1016/j.neuroimage.2016.10.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 10/05/2016] [Accepted: 10/12/2016] [Indexed: 11/28/2022] Open
Abstract
The "linear parametric neurotransmitter PET" (lp-ntPET) model was introduced to capture the time course of transient endogenous neurotransmitter response to drug stimulus from dynamic PET data. We previously used this novel analysis tool to probe the short-lived dopamine (DA) response induced by cigarette smoking in the PET scanner. It allowed us to find a sex difference in the DA signature of cigarette smoking. To make best use of this tool to characterize neurotransmitter response to drug stimulus, the sensitivity of lp-ntPET to detect such responses must be maximized. We designed a series of simulation studies to examine the impact of the following factors on the sensitivity of lp-ntPET using smoking-induced DA release as an example application: tracer delivery protocol, pre-processing for image denoising, timing of the smoking task, duration of the PET scan, and dose of the radiotracer. Our results suggest that a Bolus paradigm could replace a more difficult B/I paradigm without sacrificing the sensitivity of the method. Pre-processing the PET data with the de-noising algorithm HYPR could improve the sensitivity. The optimal timing to start the smoking task is 45min in a 90min scan and 35min in a 75min scan. A mild shortening of the scan time from 90mCi to 75min should be acceptable without loss of sensitivity. We suggest a lower dose limit of a bolus injection at 16mCi to limit underestimation of DA activation. This study established the framework to optimize the experimental design for reaching the full potential of lp-ntPET to detect neurotransmitter responses to drugs or even behavioral tasks.
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Affiliation(s)
- Shuo Wang
- Yale PET Center, Yale University, New Haven, CT, USA; Department of Biomedical Engineering, Yale University, New Haven, CT, USA
| | - Sujin Kim
- Yale PET Center, Yale University, New Haven, CT, USA; Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA
| | - Kelly P Cosgrove
- Yale PET Center, Yale University, New Haven, CT, USA; Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA; Department of Psychiatry, Yale University, New Haven, CT, USA
| | - Evan D Morris
- Yale PET Center, Yale University, New Haven, CT, USA; Department of Biomedical Engineering, Yale University, New Haven, CT, USA; Department of Radiology and Biomedical Imaging, Yale University, New Haven, CT, USA; Department of Psychiatry, Yale University, New Haven, CT, USA.
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Heilbronner SR, Rodriguez-Romaguera J, Quirk GJ, Groenewegen HJ, Haber SN. Circuit-Based Corticostriatal Homologies Between Rat and Primate. Biol Psychiatry 2016; 80:509-21. [PMID: 27450032 PMCID: PMC5438202 DOI: 10.1016/j.biopsych.2016.05.012] [Citation(s) in RCA: 216] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 04/28/2016] [Accepted: 05/17/2016] [Indexed: 10/21/2022]
Abstract
BACKGROUND Understanding the neural mechanisms of psychiatric disorders requires the use of rodent models; however, frontal-striatal homologies between rodents and primates are unclear. In contrast, within the striatum, the shell of the nucleus accumbens, the hippocampal projection zone, and the amygdala projection zone (referred to as the striatal emotion processing network [EPN]) are conserved across species. We used the relationship between the EPN and projections from the anterior cingulate cortex (ACC) and orbitofrontal cortex (OFC) to assess network similarities across rats and monkeys. METHODS We first compared the location and extent of each major component of the EPN in rats and macaques. Next, we used anatomic cases with anterograde injections in ACC/OFC to determine the extent to which corticostriatal terminal fields overlapped with these components and with each other. RESULTS The location and size of each component of the EPN were similar across species, containing projections primarily from infralimbic cortex in rats and area 25 in monkeys. Other ACC/OFC terminals overlapped extensively with infralimbic cortex/area 25 projections, supporting cross-species similarities in OFC topography. However, dorsal ACC had different connectivity profiles across species. These results were used to segment the monkey and rat striata according to ACC/OFC inputs. CONCLUSIONS Based on connectivity with the EPN, and consistent with prior literature, the infralimbic cortex and area 25 are likely homologues. We also see evidence of OFC homologies. Along with segmenting the striatum and identifying striatal hubs of overlapping inputs, these results help to translate findings between rodent models and human pathology.
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Affiliation(s)
- Sarah R Heilbronner
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, New York.
| | - Jose Rodriguez-Romaguera
- Departments of Psychiatry and Anatomy and Neurobiology, University of Puerto Rico School of Medicine, San Juan, Puerto Rico
| | - Gregory J Quirk
- Departments of Psychiatry and Anatomy and Neurobiology, University of Puerto Rico School of Medicine, San Juan, Puerto Rico
| | - Henk J Groenewegen
- Department of Anatomy and Neurosciences, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, the Netherlands
| | - Suzanne N Haber
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, New York
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Hanlon CA, Dowdle LT, Jones JL. Biomarkers for Success: Using Neuroimaging to Predict Relapse and Develop Brain Stimulation Treatments for Cocaine-Dependent Individuals. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2016; 129:125-56. [PMID: 27503451 DOI: 10.1016/bs.irn.2016.06.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Cocaine dependence is one of the most difficult substance use disorders to treat. While the powerful effects of cocaine use on behavior were documented in the 19th century, it was not until the late 20th century that we realized cocaine use was affecting brain tissue and function. Following a brief introduction (Section 1), this chapter will summarize our current knowledge regarding alterations in neural circuit function typically observed in chronic cocaine users (Section 2) and highlight an emerging body of literature which suggests that pretreatment limbic circuit activity may be a reliable predictor of clinical outcomes among individuals seeking treatment for cocaine (Section 3). Finally, as the field of addiction research strives to translate this neuroimaging data into something clinically meaningful, we will highlight several new brain stimulation approaches which utilize functional brain imaging data to design noninvasive brain stimulation interventions for individuals seeking treatment for substance dependence disorders (Section 4).
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Affiliation(s)
- C A Hanlon
- Medical University of South Carolina, Charleston, SC, United States.
| | - L T Dowdle
- Medical University of South Carolina, Charleston, SC, United States
| | - J L Jones
- Medical University of South Carolina, Charleston, SC, United States
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Abstract
Most people who are regular consumers of psychoactive drugs are not drug addicts, nor will they ever become addicts. In neurobiological theories, non-addictive drug consumption is acknowledged only as a "necessary" prerequisite for addiction, but not as a stable and widespread behavior in its own right. This target article proposes a new neurobiological framework theory for non-addictive psychoactive drug consumption, introducing the concept of "drug instrumentalization." Psychoactive drugs are consumed for their effects on mental states. Humans are able to learn that mental states can be changed on purpose by drugs, in order to facilitate other, non-drug-related behaviors. We discuss specific "instrumentalization goals" and outline neurobiological mechanisms of how major classes of psychoactive drugs change mental states and serve non-drug-related behaviors. We argue that drug instrumentalization behavior may provide a functional adaptation to modern environments based on a historical selection for learning mechanisms that allow the dynamic modification of consummatory behavior. It is assumed that in order to effectively instrumentalize psychoactive drugs, the establishment of and retrieval from a drug memory is required. Here, we propose a new classification of different drug memory subtypes and discuss how they interact during drug instrumentalization learning and retrieval. Understanding the everyday utility and the learning mechanisms of non-addictive psychotropic drug use may help to prevent abuse and the transition to drug addiction in the future.
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Abstract
Although it is challenging for individuals with cocaine addiction to achieve abstinence, the greatest difficulty is avoiding relapse to drug taking, which is often triggered by cues associated with prior cocaine use. This vulnerability to relapse persists for long periods (months to years) after abstinence is achieved. Here, I discuss rodent studies of cue-induced cocaine craving during abstinence, with a focus on neuronal plasticity in the reward circuitry that maintains high levels of craving. Such work has the potential to identify new therapeutic targets and to further our understanding of experience-dependent plasticity in the adult brain under normal circumstances and in the context of addiction.
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Affiliation(s)
- Marina E Wolf
- The Chicago Medical School at Rosalind Franklin University of Medicine and Science, 3333 Green Bay Road, North Chicago, Illinois 60064, USA
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Porrino LJ, Beveridge TJR, Smith HR, Nader MA. Functional consequences of cocaine expectation: findings in a non-human primate model of cocaine self-administration. Addict Biol 2016; 21:519-29. [PMID: 25684556 DOI: 10.1111/adb.12231] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Exposure to stimuli and environments associated with drug use is considered one of the most important contributors to relapse among substance abusers. Neuroimaging studies have identified neural circuits underlying these responses in cocaine-dependent subjects. But these studies are often difficult to interpret because of the heterogeneity of the participants, substances abused, and differences in drug histories and social variables. Therefore, the goal of this study was to assess the functional effects of exposure to cocaine-associated stimuli in a non-human primate model of cocaine self-administration, providing precise control over these variables, with the 2-[(14) C]deoxyglucose method. Rhesus monkeys self-administered 0.3 mg/kg/injection cocaine (n = 4) under a fixed-interval 3-minute (FI 3-min) schedule of reinforcement (30 injections/session) for 100 sessions. Control animals (n = 4) underwent identical schedules of food reinforcement. Sessions were then discontinued for 30 days, after which time, monkeys were exposed to cocaine- or food-paired cues, and the 2-[(14) C]deoxyglucose experiment was conducted. The presentation of the cocaine-paired cues resulted in significant increases in functional activity within highly restricted circuits that included portions of the pre-commissural striatum, medial prefrontal cortex, rostral temporal cortex and limbic thalamus when compared with control animals presented with the food-paired cues. The presentation of cocaine-associated cues increased brain functional activity in contrast to the decreases observed after cocaine consumption. Furthermore, the topography of brain circuits engaged by the expectation of cocaine is similar to the distribution of effects during the earliest phases of cocaine self-administration, prior to the onset of neuroadaptations that accompany chronic cocaine exposure.
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Affiliation(s)
- Linda J. Porrino
- Center for the Neurobiology of Addiction Treatment; Department of Physiology and Pharmacology; Wake Forest School of Medicine; Winston Salem NC USA
| | - Thomas J. R. Beveridge
- Center for the Neurobiology of Addiction Treatment; Department of Physiology and Pharmacology; Wake Forest School of Medicine; Winston Salem NC USA
| | - Hilary R. Smith
- Center for the Neurobiology of Addiction Treatment; Department of Physiology and Pharmacology; Wake Forest School of Medicine; Winston Salem NC USA
| | - Michael A. Nader
- Center for the Neurobiology of Addiction Treatment; Department of Physiology and Pharmacology; Wake Forest School of Medicine; Winston Salem NC USA
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Keiflin R, Janak PH. Dopamine Prediction Errors in Reward Learning and Addiction: From Theory to Neural Circuitry. Neuron 2016; 88:247-63. [PMID: 26494275 DOI: 10.1016/j.neuron.2015.08.037] [Citation(s) in RCA: 201] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Midbrain dopamine (DA) neurons are proposed to signal reward prediction error (RPE), a fundamental parameter in associative learning models. This RPE hypothesis provides a compelling theoretical framework for understanding DA function in reward learning and addiction. New studies support a causal role for DA-mediated RPE activity in promoting learning about natural reward; however, this question has not been explicitly tested in the context of drug addiction. In this review, we integrate theoretical models with experimental findings on the activity of DA systems, and on the causal role of specific neuronal projections and cell types, to provide a circuit-based framework for probing DA-RPE function in addiction. By examining error-encoding DA neurons in the neural network in which they are embedded, hypotheses regarding circuit-level adaptations that possibly contribute to pathological error signaling and addiction can be formulated and tested.
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Affiliation(s)
- Ronald Keiflin
- Department of Psychological and Brain Sciences, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Patricia H Janak
- Department of Psychological and Brain Sciences, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD 21218, USA; Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
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