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Xu C, Zhang Z, Hou D, Wang G, Li C, Ma X, Wang K, Luo H, Zhu M. Effects of exercise interventions on negative emotions, cognitive performance and drug craving in methamphetamine addiction. Front Psychiatry 2024; 15:1402533. [PMID: 38827441 PMCID: PMC11140390 DOI: 10.3389/fpsyt.2024.1402533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Accepted: 04/30/2024] [Indexed: 06/04/2024] Open
Abstract
Introduction Methamphetamine is currently one of the most commonly used addictive substances with strong addiction and a high relapse rate. This systematic review aims to examine the effectiveness of physical activity in improving negative emotions, cognitive impairment, and drug craving in people with methamphetamine use disorder (MUD). Methods A total of 17 studies out of 133 found from Embase and PubMed were identified, reporting results from 1836 participants from MUD populations. Original research using clearly described physical activity as interventions and reporting quantifiable outcomes of negative mood, cognitive function and drug craving level in people with MUD were eligible for inclusion. We included prospective studies, randomized controlled trials, or intervention studies, focusing on the neurological effects of physical activity on MUD. Results Taken together, the available clinical evidence showed that physical activity-based interventions may be effective in managing MUD-related withdrawal symptoms. Discussion Physical exercise may improve drug rehabilitation efficiency by improving negative emotions, cognitive behaviors, and drug cravings. Systematic review registration https://www.crd.york.ac.uk/PROSPERO/, identifier CRD42024530359.
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Affiliation(s)
- Conghui Xu
- School of Medicine, Yunnan University, Kunming, China
- Yunnan Technological Innovation Centre of Drug Addiction Medicine, Yunnan University, Kunming, China
| | - Zunyue Zhang
- School of Medicine, Yunnan University, Kunming, China
- Yunnan Technological Innovation Centre of Drug Addiction Medicine, Yunnan University, Kunming, China
| | - Dezhi Hou
- School of Medicine, Yunnan University, Kunming, China
- Department of General Surgery I, First People’s Hospital of Yunnan Province, Kunming, China
| | - Guangqing Wang
- Department of Rehabilitation Education and Corrections, Drug Rehabilitation Administration of Yunnan Province, Kunming, China
| | - Congbin Li
- Department of Rehabilitation Education and Corrections, Drug Rehabilitation Administration of Yunnan Province, Kunming, China
| | - Xingfeng Ma
- Department of Rehabilitation Education and Corrections, Drug Rehabilitation Administration of Yunnan Province, Kunming, China
| | - Kunhua Wang
- School of Medicine, Yunnan University, Kunming, China
- Yunnan Technological Innovation Centre of Drug Addiction Medicine, Yunnan University, Kunming, China
| | - Huayou Luo
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Mei Zhu
- Department of Ultrasound, The First Affiliated Hospital of Kunming Medical University, Kunming, China
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Towers EB, Shapiro DA, Abel JM, Bakhti-Suroosh A, Kupkova K, Auble DT, Grant PA, Lynch WJ. Transcriptional Profile of Exercise-Induced Protection Against Relapse to Cocaine Seeking in a Rat Model. BIOLOGICAL PSYCHIATRY GLOBAL OPEN SCIENCE 2023; 3:734-745. [PMID: 37881559 PMCID: PMC10593899 DOI: 10.1016/j.bpsgos.2023.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/23/2023] [Accepted: 01/25/2023] [Indexed: 02/05/2023] Open
Abstract
Background Exercise has shown promise as a treatment for cocaine use disorder; however, the mechanism underlying its efficacy has remained elusive. Methods We used a rat model of relapse (cue-induced reinstatement) and exercise (wheel running, 2 hours/day) coupled with RNA sequencing to establish transcriptional profiles associated with the protective effects of exercise (during early withdrawal [days 1-7] or throughout withdrawal [days 1-14]) versus noneffective exercise (during late withdrawal [days 8-14]) against cocaine-seeking and sedentary conditions. Results As expected, cue-induced cocaine seeking was highest in the sedentary and late-withdrawal exercise groups; both groups also showed upregulation of a Grin1-associated transcript and enrichment of Drd1-Nmdar1 complex and glutamate receptor complex terms. Surprisingly, these glutamate markers were also enriched in the early- and throughout-withdrawal exercise groups, despite lower levels of cocaine seeking. However, a closer examination of the Grin1-associated transcript revealed a robust loss of transcripts spanning exons 9 and 10 in the sedentary condition relative to saline controls that was normalized by early- and throughout-withdrawal exercise, but not late-withdrawal exercise, indicating that these exercise conditions may normalize RNA mis-splicing induced by cocaine seeking. Our findings also revealed novel mechanisms by which exercise initiated during early withdrawal may modulate glutamatergic signaling in dorsomedial prefrontal cortex (e.g., via transcripts associated with non-NMDA glutamate receptors or those affecting signaling downstream of NMDA receptors), along with mechanisms outside of glutamatergic signaling such as circadian rhythm regulation and neuronal survival. Conclusions These findings provide a rich resource for future studies aimed at manipulating these molecular networks to better understand how exercise decreases cocaine seeking.
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Affiliation(s)
- Eleanor Blair Towers
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, Virginia
- Medical Scientist Training Program, University of Virginia, Charlottesville, Virginia
| | - Daniel A. Shapiro
- Center for Brain Immunology and Glia, Department of Neuroscience, University of Virginia, Charlottesville, Virginia
| | - Jean M. Abel
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, Virginia
| | - Anousheh Bakhti-Suroosh
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, Virginia
| | - Kristyna Kupkova
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, Virginia
| | - David T. Auble
- Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, Virginia
| | - Patrick A. Grant
- Department of Biomedical Science, Florida Atlantic University, Boca Raton, Florida
| | - Wendy J. Lynch
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, Virginia
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Li X, Li K, Zhu Z, Jin Y, Gao Z, Xu J, Zhang L. Exercise Regulates the Metabolic Homeostasis of Methamphetamine Dependence. Metabolites 2022; 12:metabo12070606. [PMID: 35888730 PMCID: PMC9323070 DOI: 10.3390/metabo12070606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 06/21/2022] [Accepted: 06/25/2022] [Indexed: 12/10/2022] Open
Abstract
Physical exercise is effective in enhancing cognitive function, reducing anxiety and depressive symptoms, reducing cravings, and improving quality of life in methamphetamine (METH) addiction. However, little is known about the effect of exercise on metabolic profiles. We performed LC/MS-based targeted metabolic profiling on serum samples to investigate the metabolic characteristics of METH dependence and find the differences between METH-dependent individuals and nonusers and evaluated the metabolomic profiles of individuals with METH dependence following aerobic exercise training. We identified a total of 201 metabolites, among which 115 were differentially expressed under METH use. Among the differentially regulated metabolites, 72 were selected as potential biomarkers. Further analysis identified 19 pathways, among which glyoxylate and dicarboxylate metabolism; alanine, aspartate, and glutamate metabolism; and citrate cycle were most significantly affected by METH. The aerobic exercise intervention differentially regulated 55 metabolites, of which 51 were selected as potential biomarkers and were mainly enriched in 10 pathways. Interestingly, alanine, aspartate, and glutamate metabolism and nitrogen metabolism were the remarkably affected pathways. Furthermore, METH increased the serum levels of glutamate and decreased GABA, whereas exercise decreased the serum levels of glutamate and increased GABA. Results suggested that METH dependency disturbed normal metabolic homeostasis, whereas exercise restored metabolism.
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Affiliation(s)
- Xue Li
- School of Sports Medicine and Health, Chengdu Sport University, Chengdu 610041, China; (Z.Z.); (Y.J.); (Z.G.); (J.X.)
- Correspondence:
| | - Kefeng Li
- Department of Medicine, Quzhou College of Technology, Quzhou 324000, China;
| | - Zhicheng Zhu
- School of Sports Medicine and Health, Chengdu Sport University, Chengdu 610041, China; (Z.Z.); (Y.J.); (Z.G.); (J.X.)
| | - Yu Jin
- School of Sports Medicine and Health, Chengdu Sport University, Chengdu 610041, China; (Z.Z.); (Y.J.); (Z.G.); (J.X.)
| | - Zhanle Gao
- School of Sports Medicine and Health, Chengdu Sport University, Chengdu 610041, China; (Z.Z.); (Y.J.); (Z.G.); (J.X.)
| | - Jisheng Xu
- School of Sports Medicine and Health, Chengdu Sport University, Chengdu 610041, China; (Z.Z.); (Y.J.); (Z.G.); (J.X.)
| | - Li Zhang
- Key Laboratory of Central CNS Regeneration (Ministry of Education), Guangdong-Hong Kong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou 510632, China;
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Marrero-Cristobal G, Gelpi-Dominguez U, Morales-Silva R, Alvarado-Torres J, Perez-Torres J, Perez-Perez Y, Sepulveda-Orengo M. Aerobic exercise as a promising nonpharmacological therapy for the treatment of substance use disorders. J Neurosci Res 2021; 100:1602-1642. [PMID: 34850988 PMCID: PMC9156662 DOI: 10.1002/jnr.24990] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 10/06/2021] [Accepted: 10/14/2021] [Indexed: 12/12/2022]
Abstract
Despite the prevalence and public health impact of substance use disorders (SUDs), effective long-term treatments remain elusive. Aerobic exercise is a promising, nonpharmacological treatment currently under investigation as a strategy for preventing drug relapse. Aerobic exercise could be incorporated into the comprehensive treatment regimens for people with substance abuse disorders. Preclinical studies of SUD with animal models have shown that aerobic exercise diminishes drug-seeking behavior, which leads to relapse, in both male and female rats. Nevertheless, little is known regarding the effects of substance abuse-induced cellular and physiological adaptations believed to be responsible for drug-seeking behavior. Accordingly, the overall goal of this review is to provide a summary and an assessment of findings to date, highlighting evidence of the molecular and neurological effects of exercise on adaptations associated with SUD.
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Affiliation(s)
| | - Ursula Gelpi-Dominguez
- School of Behavioral and Brain Sciences, Ponce Health Sciences University, Ponce, PR, USA
| | - Roberto Morales-Silva
- Department of Basic Sciences, Ponce Research Institute, Ponce Health Sciences University, Ponce, PR, USA
| | - John Alvarado-Torres
- Department of Basic Sciences, Ponce Research Institute, Ponce Health Sciences University, Ponce, PR, USA
| | - Joshua Perez-Torres
- Department of Basic Sciences, Ponce Research Institute, Ponce Health Sciences University, Ponce, PR, USA
| | - Yobet Perez-Perez
- Department of Basic Sciences, Ponce Research Institute, Ponce Health Sciences University, Ponce, PR, USA
| | - Marian Sepulveda-Orengo
- Department of Basic Sciences, Ponce Research Institute, Ponce Health Sciences University, Ponce, PR, USA
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Jung S, Kim Y, Kim M, Seo M, Kim S, Kim S, Lee S. Exercise Pills for Drug Addiction: Forced Moderate Endurance Exercise Inhibits Methamphetamine-Induced Hyperactivity through the Striatal Glutamatergic Signaling Pathway in Male Sprague Dawley Rats. Int J Mol Sci 2021; 22:ijms22158203. [PMID: 34360969 PMCID: PMC8348279 DOI: 10.3390/ijms22158203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/26/2021] [Accepted: 07/28/2021] [Indexed: 01/22/2023] Open
Abstract
Physical exercise reduces the extent, duration, and frequency of drug use in drug addicts during the drug initiation phase, as well as during prolonged addiction, withdrawal, and recurrence. However, information about exercise-induced neurobiological changes is limited. This study aimed to investigate the effects of forced moderate endurance exercise training on methamphetamine (METH)-induced behavior and the associated neurobiological changes. Male Sprague Dawley rats were subjected to the administration of METH (1 mg/kg/day, i.p.) and/or forced moderate endurance exercise (treadmill running, 21 m/min, 60 min/day) for 2 weeks. Over the two weeks, endurance exercise training significantly reduced METH-induced hyperactivity. METH and/or exercise treatment increased striatal dopamine (DA) levels, decreased p(Thr308)-Akt expression, and increased p(Tyr216)-GSK-3β expression. However, the phosphorylation levels of Ser9-GSK-3β were significantly increased in the exercise group. METH administration significantly increased the expression of NMDAr1, CaMKK2, MAPKs, and PP1 in the striatum, and exercise treatment significantly decreased the expression of these molecules. Therefore, it is apparent that endurance exercise inhibited the METH-induced hyperactivity due to the decrease in GSK-3β activation by the regulation of the striatal glutamate signaling pathway.
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Affiliation(s)
| | | | | | | | | | | | - Sooyeun Lee
- Correspondence: ; Tel.: +82-53-580-6651; Fax: +82-53-580-5164
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Vázquez-León P, Miranda-Páez A, Chávez-Reyes J, Allende G, Barragán-Iglesias P, Marichal-Cancino BA. The Periaqueductal Gray and Its Extended Participation in Drug Addiction Phenomena. Neurosci Bull 2021; 37:1493-1509. [PMID: 34302618 DOI: 10.1007/s12264-021-00756-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Accepted: 05/11/2021] [Indexed: 12/19/2022] Open
Abstract
The periaqueductal gray (PAG) is a complex mesencephalic structure involved in the integration and execution of active and passive self-protective behaviors against imminent threats, such as immobility or flight from a predator. PAG activity is also associated with the integration of responses against physical discomfort (e.g., anxiety, fear, pain, and disgust) which occurs prior an imminent attack, but also during withdrawal from drugs such as morphine and cocaine. The PAG sends and receives projections to and from other well-documented nuclei linked to the phenomenon of drug addiction including: (i) the ventral tegmental area; (ii) extended amygdala; (iii) medial prefrontal cortex; (iv) pontine nucleus; (v) bed nucleus of the stria terminalis; and (vi) hypothalamus. Preclinical models have suggested that the PAG contributes to the modulation of anxiety, fear, and nociception (all of which may produce physical discomfort) linked with chronic exposure to drugs of abuse. Withdrawal produced by the major pharmacological classes of drugs of abuse is mediated through actions that include participation of the PAG. In support of this, there is evidence of functional, pharmacological, molecular. And/or genetic alterations in the PAG during the impulsive/compulsive intake or withdrawal from a drug. Due to its small size, it is difficult to assess the anatomical participation of the PAG when using classical neuroimaging techniques, so its physiopathology in drug addiction has been underestimated and poorly documented. In this theoretical review, we discuss the involvement of the PAG in drug addiction mainly via its role as an integrator of responses to the physical discomfort associated with drug withdrawal.
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Affiliation(s)
- Priscila Vázquez-León
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Ciudad Universitaria, 20131, Aguascalientes, Ags., Mexico
| | - Abraham Miranda-Páez
- Departamento de Fisiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Wilfrido Massieu esq. Manuel Stampa s/n Col. Nueva Industrial Vallejo, 07738, Gustavo A. Madero, Mexico City, Mexico
| | - Jesús Chávez-Reyes
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Ciudad Universitaria, 20131, Aguascalientes, Ags., Mexico
| | - Gonzalo Allende
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Ciudad Universitaria, 20131, Aguascalientes, Ags., Mexico
| | - Paulino Barragán-Iglesias
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Ciudad Universitaria, 20131, Aguascalientes, Ags., Mexico.
| | - Bruno A Marichal-Cancino
- Departamento de Fisiología y Farmacología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, Ciudad Universitaria, 20131, Aguascalientes, Ags., Mexico.
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Female rats display higher methamphetamine-primed reinstatement and c-Fos immunoreactivity than male rats. Pharmacol Biochem Behav 2021; 201:173089. [PMID: 33422599 DOI: 10.1016/j.pbb.2020.173089] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 12/07/2020] [Accepted: 12/08/2020] [Indexed: 11/20/2022]
Abstract
Methamphetamine (meth) dependence is often characterized by persistent and chronic relapse (i.e., return to drug use). Previous work suggests females may be at greater risk to relapse. In this study, we extended this limited evidence and identified sex-dependent neural substrates related to meth-triggered reinstatement. Male and female Sprague-Dawley rats were implanted with indwelling jugular catheters. Half of the rats were then trained to self-administer meth (0.05 mg/kg/inf); the other half self-administered saline during 21 daily sessions (2 h). Rats were then given 12 extinction sessions. Twenty-four hours after the last extinction session, rats received reinstatement testing. Half of the rats received a meth-prime (0.3 mg/kg, IP) injection and the remaining rats received a saline injection. This design resulted in 4 separate groups for each sex, allowing for careful investigation of brain regions related to meth-triggered reinstatement. Brains were harvested following the reinstatement session and c-Fos immunoreactivity was measured in multiple brain regions. Meth triggered reinstatement in both sexes and this effect was more robust in females compared to males. Significant sex differences were detected. Females showed greater c-Fos immunoreactivity in the cingulate cortex area 1, lateral orbitofrontal cortex, prelimbic cortex, caudate-putamen, nucleus accumbens core and shell, and central nucleus of the amygdala following meth-primed reinstatement.
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Zhang S, Zhornitsky S, Wang W, Dhingra I, Le TM, Li CSR. Cue-elicited functional connectivity of the periaqueductal gray and tonic cocaine craving. Drug Alcohol Depend 2020; 216:108240. [PMID: 32853997 PMCID: PMC7606798 DOI: 10.1016/j.drugalcdep.2020.108240] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 08/11/2020] [Accepted: 08/12/2020] [Indexed: 12/19/2022]
Abstract
BACKGROUND Withdrawal from chronic cocaine use leads to anxiety and dysphoria that may perpetuate habitual drug use. The pain circuit is widely implicated in the processing and manifestations of negative emotions. Numerous studies have focused on characterizing reward circuit dysfunction but relatively little is known about the pain circuit response during cocaine withdrawal. METHODS Here we examined the activity and connectivity of the periaqueductal gray (PAG), a hub of the pain circuit, during cocaine cue exposure in 52 recently abstinent cocaine dependent participants (CD, 42 men). Imaging data were processed with published routines, and the results were evaluated at a corrected threshold. RESULTS CD showed higher activation of the PAG and connectivity of the PAG with the ventromedial prefrontal cortex (vmPFC) during cocaine as compared to neutral cue exposure. PAG-vmPFC connectivity was positively and negatively correlated with tonic cocaine craving, as assessed by the Cocaine Craving Questionnaire, in male and female CD, respectively, and the sex difference was confirmed by a slope test. Granger causality analyses showed that the PAG Granger caused vmPFC time series in men and the reverse was true in women, substantiating sex differences in the directional interactions of the PAG and vmPFC. CONCLUSION The findings provide the first evidence in humans implicating the PAG circuit in cocaine withdrawal and cocaine craving and advance our understanding of the role of the pain circuit and negative reinforcement in sustaining habitual drug use in cocaine addiction.
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Affiliation(s)
- Sheng Zhang
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States.
| | - Simon Zhornitsky
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT
| | - Wuyi Wang
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT
| | - Isha Dhingra
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT
| | - Thang M. Le
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT
| | - Chiang-shan R. Li
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT,Department of Neuroscience, Yale University School of Medicine, New Haven, CT,Interdepartmental Neuroscience Program, Yale University, New Haven, CT
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Althobaiti YS, Almalki AH. Effects of environmental enrichment on reinstatement of methamphetamine-induced conditioned place preference. Behav Brain Res 2020; 379:112372. [PMID: 31759048 DOI: 10.1016/j.bbr.2019.112372] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 11/15/2019] [Accepted: 11/19/2019] [Indexed: 12/17/2022]
Abstract
OBJECTIVE The influence of environmental enrichment (EE) on reinstatement to methamphetamine (METH) seeking in rat model was investigated. METHODS Wistar rats were divided to receive saline (1 ml/kg) or METH (1 mg/kg, i.p.) for 8 days during the conditioning training in the conditioned place preference (CPP) paradigm, which is one of the most popular models to study the motivational effects of drugs and non-drug treatments in experimental animals. Rats were then kept in either isolated (IE) or enriched environment (EE) for 30 days during the extinction training. Animals were finally examined for reinstatement provoked by i.p. injections of METH. RESULTS Saline injections during the conditioning phase did not change CPP during reinstatement in animals of IE or EE control groups. METH injections reinstated place preference in the IE animal group. Interestingly, EE significantly blocked this reinstatement effects of METH. CONCLUSION These results show the important role of social interactions and positive environment conditions in preventing reinstatement to drug use.
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Affiliation(s)
- Yusuf S Althobaiti
- Taif University, College of Pharmacy, Department of Pharmacology and Toxicology, Taif, Saudi Arabia; Taif University, College of Pharmacy, Addiction and Neuroscience Research Unit, Taif, Saudi Arabia.
| | - Atiah H Almalki
- Taif University, College of Pharmacy, Addiction and Neuroscience Research Unit, Taif, Saudi Arabia; Taif University, College of Pharmacy, Department of Pharmaceutical chemistry, Taif, Saudi Arabia
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Therapeutic efficacy of environmental enrichment for substance use disorders. Pharmacol Biochem Behav 2019; 188:172829. [PMID: 31778722 DOI: 10.1016/j.pbb.2019.172829] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 11/13/2019] [Accepted: 11/15/2019] [Indexed: 12/18/2022]
Abstract
Addiction to drug and alcohol is regarded as a major health problem worldwide for which available treatments show limited effectiveness. The biggest challenge remains to enhance the capacities of interventions to reduce craving, prevent relapse and promote long-term recovery. New strategies to meet these challenges are being explored. Findings from preclinical work suggest that environmental enrichment (EE) holds therapeutic potential for the treatment of substance use disorders, as demonstrated in a number of animal models of drug abuse. The EE intervention introduced after drug exposure leads to attenuation of compulsive drug taking, attenuation of the rewarding (and reinforcing) effects of drugs, reductions in control of behavior by drug cues, and, very importantly, relapse prevention. Clinical work also suggests that multidimensional EE interventions (involving physical activity, social interaction, vocational training, recreational and community involvement) might produce similar therapeutic effects, if implemented continuously and rigorously. In this review we survey preclinical and clinical studies assessing the efficacy of EE as a behavioral intervention for substance use disorders and address related challenges. We also review work providing empirical evidence for EE-induced neuroplasticity within the mesocorticolimbic system that is believed to contribute to the seemingly therapeutic effects of EE on drug and alcohol-related behaviors.
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Transient Chemogenetic Inhibition of D1-MSNs in the Dorsal Striatum Enhances Methamphetamine Self-Administration. Brain Sci 2019; 9:brainsci9110330. [PMID: 31752398 PMCID: PMC6895983 DOI: 10.3390/brainsci9110330] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 11/13/2019] [Indexed: 12/31/2022] Open
Abstract
The dorsal striatum is important for the development of drug addiction; however, the role of dopamine D1 receptor (D1R) expressing medium-sized spiny striatonigral (direct pathway) neurons (D1-MSNs) in regulating excessive methamphetamine intake remains elusive. Here we seek to determine if modulating D1-MSNs in the dorsal striatum alters methamphetamine self-administration in animals that have demonstrated escalation of self-administration. A viral vector-mediated approach was used to induce expression of the inhibitory (Gi coupled-hM4D) or stimulatory (Gs coupled-rM3D) designer receptors exclusively activated by designer drugs (DREADDs) engineered to specifically respond to the exogenous ligand clozapine-N-oxide (CNO) selectively in D1-MSNs in the dorsal striatum. CNO in animals expressing hM4D increased responding for methamphetamine compared to vehicle in a within subject treatment paradigm. CNO in animals that did not express DREADDs (DREADD naïve-CNO) or expressed rM3D did not alter responding for methamphetamine, demonstrating specificity for hM4D-CNO interaction in increasing self-administration. Postmortem tissue analysis reveals that hM4D-CNO animals had reduced Fos immunoreactivity in the dorsal striatum compared to rM3D-CNO animals and DREADD naïve-CNO animals. Cellular mechanisms in the dorsal striatum in hM4D-CNO animals reveal enhanced expression of D1R and Ca2+/calmodulin-dependent kinase II (CaMKII). Conversely, rM3D-CNO animals had enhanced activity of extracellular signal-regulated kinase (Erk1/2) and Akt in the dorsal striatum, supporting rM3D-CNO interaction in these animals compared with drug naïve controls, DREADD naïve-CNO and hM4D-CNO animals. Our studies indicate that transient inhibition of D1-MSNs-mediated strengthening of methamphetamine addiction-like behavior is associated with cellular adaptations that support dysfunctional dopamine signaling in the dorsal striatum.
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Abstract
Exercise intervention has long been used as one adjunctive treatment for drug abuse. Both animal studies and human trials suggest that exercise training effectively prevents addiction formation, suppresses drug-seeking behaviors, and ceases addictions. Moreover, exercise improves both mental and cognitive deficits that commonly occur during drug withdrawal. Those observations are supported by neurobiological studies in which exercise training modulates several neural networks including the dopaminergic reward system, and regulates neurogenesis and spinogenesis that affect cognitive behaviors and mental health. In sum, exercise training is a safe and effective way to relieve substance abuse, although both intervention guideline and biomarkers warrants further investigation.
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Affiliation(s)
- Li Zhang
- GHM Institute of CNS Regeneration, Jinan University, China
| | - Ti-Fei Yuan
- Shanghai Key Laboratory for Psychotic disorders, Shanghai Mental Health Center, Shanghai Jiaotong University School of Medicine, China.
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Ferrucci M, Limanaqi F, Ryskalin L, Biagioni F, Busceti CL, Fornai F. The Effects of Amphetamine and Methamphetamine on the Release of Norepinephrine, Dopamine and Acetylcholine From the Brainstem Reticular Formation. Front Neuroanat 2019; 13:48. [PMID: 31133823 PMCID: PMC6524618 DOI: 10.3389/fnana.2019.00048] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 04/26/2019] [Indexed: 12/22/2022] Open
Abstract
Amphetamine (AMPH) and methamphetamine (METH) are widely abused psychostimulants, which produce a variety of psychomotor, autonomic and neurotoxic effects. The behavioral and neurotoxic effects of both compounds (from now on defined as AMPHs) stem from a fair molecular and anatomical specificity for catecholamine-containing neurons, which are placed in the brainstem reticular formation (RF). In fact, the structural cross-affinity joined with the presence of shared molecular targets between AMPHs and catecholamine provides the basis for a quite selective recruitment of brainstem catecholamine neurons following AMPHs administration. A great amount of investigations, commentary manuscripts and books reported a pivotal role of mesencephalic dopamine (DA)-containing neurons in producing behavioral and neurotoxic effects of AMPHs. Instead, the present review article focuses on catecholamine reticular neurons of the low brainstem. In fact, these nuclei add on DA mesencephalic cells to mediate the effects of AMPHs. Among these, we also include two pontine cholinergic nuclei. Finally, we discuss the conundrum of a mixed neuronal population, which extends from the pons to the periaqueductal gray (PAG). In this way, a number of reticular nuclei beyond classic DA mesencephalic cells are considered to extend the scenario underlying the neurobiology of AMPHs abuse. The mechanistic approach followed here to describe the action of AMPHs within the RF is rooted on the fine anatomy of this region of the brainstem. This is exemplified by a few medullary catecholamine neurons, which play a pivotal role compared with the bulk of peripheral sympathetic neurons in sustaining most of the cardiovascular effects induced by AMPHs.
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Affiliation(s)
- Michela Ferrucci
- Human Anatomy, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Fiona Limanaqi
- Human Anatomy, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Larisa Ryskalin
- Human Anatomy, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | | | | | - Francesco Fornai
- Human Anatomy, Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
- IRCCS Neuromed, Pozzilli, Italy
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14
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Huang J, Zheng Y, Gao D, Hu M, Yuan T. Effects of Exercise on Depression, Anxiety, Cognitive Control, Craving, Physical Fitness and Quality of Life in Methamphetamine-Dependent Patients. Front Psychiatry 2019; 10:999. [PMID: 32047445 PMCID: PMC6997340 DOI: 10.3389/fpsyt.2019.00999] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 12/17/2019] [Indexed: 01/23/2023] Open
Abstract
Methamphetamine (MA) abuse results in a variety of harmful changes in mood states and cognitive function, together with declined physical health and quality of life. Recent studies highlighted the therapeutic potential of physical exercise on MA addiction. Physical exercise improves emotional state and general health conditions, enhances cognitive function, reduces relapse rate, and facilitates abstinence, thereby improves the overall quality of life of the drug users. This review summarizes the present situation of physical exercise on MA-dependent patients with both animal and clinical population results.
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Affiliation(s)
- Junhao Huang
- Guangdong Provincial Key Laboratory of Sports and Health Promotion, Scientific Research Center, Guangzhou Sport University, Guangzhou, China
| | - Yuqing Zheng
- Guangdong Provincial Key Laboratory of Sports and Health Promotion, Scientific Research Center, Guangzhou Sport University, Guangzhou, China
| | - Dongdong Gao
- Guangdong Provincial Key Laboratory of Sports and Health Promotion, Scientific Research Center, Guangzhou Sport University, Guangzhou, China
| | - Min Hu
- Guangdong Provincial Key Laboratory of Sports and Health Promotion, Scientific Research Center, Guangzhou Sport University, Guangzhou, China
| | - Tifei Yuan
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, China
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15
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Takashima Y, Tseng J, Fannon MJ, Purohit DC, Quach LW, Terranova MJ, Kharidia KM, Oliver RJ, Mandyam CD. Sex Differences in Context-Driven Reinstatement of Methamphetamine Seeking is Associated with Distinct Neuroadaptations in the Dentate Gyrus. Brain Sci 2018; 8:brainsci8120208. [PMID: 30487415 PMCID: PMC6316047 DOI: 10.3390/brainsci8120208] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 11/16/2018] [Accepted: 11/22/2018] [Indexed: 12/15/2022] Open
Abstract
The present study examined differences in operant responses in adult male and female rats during distinct phases of addiction. Males and females demonstrated escalation in methamphetamine (0.05 mg/kg, i.v.) intake with females showing enhanced latency to escalate, and bingeing. Following protracted abstinence, females show reduced responses during extinction, and have greater latency to extinguish compared with males, indicating reduced craving. Females demonstrated lower context-driven reinstatement compared to males, indicating that females have less motivational significance to the context associated with methamphetamine. Whole-cell patch-clamp recordings on dentate gyrus (DG) granule cell neurons (GCNs) were performed in acute brain slices from controls and methamphetamine experienced male and female rats, and neuronal excitability was evaluated from GCNs. Reinstatement of methamphetamine seeking reduced spiking in males, and increased spiking in females compared to controls, demonstrating distinct neuroadaptations in intrinsic excitability of GCNs in males and females. Reduced excitability of GCNs in males was associated with enhanced levels of neural progenitor cells, expression of plasticity-related proteins including CaMKII, and choline acetyltransferase in the DG. Enhanced excitability in females was associated with an increased GluN2A/2B ratio, indicating changes in postsynaptic GluN subunit composition in the DG. Altered intrinsic excitability of GCNs was associated with reduced mossy fiber terminals in the hilus and pyramidal projections, demonstrating compromised neuroplasticity in the DG in both sexes. The alterations in excitability, plasticity-related proteins, and mossy fiber density were correlated with enhanced activation of microglial cells in the hilus, indicating neuroimmune responses in both sexes. Together, the present results indicate sexually dimorphic adaptive biochemical changes in excitatory neurotransmitter systems in the DG and highlight the importance of including sex as a biological variable in exploring neuroplasticity and neuroimmune changes that predict enhanced relapse to methamphetamine-seeking behaviors.
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Affiliation(s)
- Yoshio Takashima
- Department of Anesthesiology, University of California San Diego, San Diego, CA 92161, USA.
- VA San Diego Healthcare System, San Diego, CA 92161, USA.
| | - Joyee Tseng
- VA San Diego Healthcare System, San Diego, CA 92161, USA.
| | | | | | - Leon W Quach
- VA San Diego Healthcare System, San Diego, CA 92161, USA.
| | | | | | | | - Chitra D Mandyam
- Department of Anesthesiology, University of California San Diego, San Diego, CA 92161, USA.
- VA San Diego Healthcare System, San Diego, CA 92161, USA.
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16
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Khazaee-Pool M, Jahangiry L, Pashaei T, Ramezani-Badr F, Nadrian H, Ponnet K. Development and psychometric properties of the methamphetamine decisional balance scale (METH-DBS) for young adults. SUBSTANCE ABUSE TREATMENT PREVENTION AND POLICY 2018; 13:38. [PMID: 30373625 PMCID: PMC6206728 DOI: 10.1186/s13011-018-0175-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 10/17/2018] [Indexed: 11/10/2022]
Abstract
BACKGROUND Drug misuse is a major problem that has an extreme negative effect on people's health. Methamphetamine (MA) is frequently used by young adults, despite its harmful consequences. The Transtheoretical Model (TTM) has been known to be very effective in explaining both the achievement and cessation of several health-related behaviors. Therefore, in this study, the TTM was used toward the domain of immoderate MA use among young adults. This study aimed to test the validity and reliability of a decisional balance scale for MA use in young adults. METHODS A multi-phase scale development approach was used to develop the scale. First, 41 university students enrolled in a qualitative study that generated content for a primary set of a 40-item instrument. In order to produce a pre-final version of the instrument, face and content validity were calculated in the next step. The instrument validation was assessed with a sample of 250 university students. Then, the construct validity (exploratory and confirmatory), convergent validity, discriminate validity, internal consistency applying test-retest reliability, and Cronbach's alpha of the scale were measured. RESULTS Forty items were initially generated from the qualitative data. After content validity, this amount was reduced to 25 items. The exploratory factor analysis revealed four factors (self and other cons, coping and social pros) containing 21 items that jointly accounted for 55.24% of the observed variance. The confirmatory factor analysis indicated a model with appropriate fitness for the data. Cronbach's alpha coefficient for the dimensions ranged from .74 to .87, and the Intraclass Correlation Coefficient (ICC) ranged from .83 to .91, which is within acceptable ranges. CONCLUSION The findings showed that the Methamphetamine Decisional Balance Scale is a valid and reliable scale that increases our ability to study motivational factors related to MA use among young adult. Consequently, the instrument could be applied in both practice and future studies.
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Affiliation(s)
- Maryam Khazaee-Pool
- Department of Health Education and Promotion, School of Public Health, Zanjan University of Medical Sciences, Zanjan, Iran.
| | - Leila Jahangiry
- Department of Health Education and Health Promotion, Health Faculty, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Tahereh Pashaei
- Environmental Health Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran. .,Department of Public Health, Faculty of Health, Kurdistan University of Medical Sciences, Sanandaj, Iran.
| | - Farhad Ramezani-Badr
- Department of Critical Care Nursing, School of Nursing and Midwifery, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Haidar Nadrian
- Department of Health Education and Health Promotion, Health Faculty, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Koen Ponnet
- Department of Communication Sciences, Faculty of Political and Social Sciences, imec-mict-Ghent University, Ghent, Belgium
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17
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Saanijoki T, Nummenmaa L, Tuulari JJ, Tuominen L, Arponen E, Kalliokoski KK, Hirvonen J. Aerobic exercise modulates anticipatory reward processing via the μ-opioid receptor system. Hum Brain Mapp 2018; 39:3972-3983. [PMID: 29885086 DOI: 10.1002/hbm.24224] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 04/20/2018] [Accepted: 05/10/2018] [Indexed: 01/18/2023] Open
Abstract
Physical exercise modulates food reward and helps control body weight. The endogenous µ-opioid receptor (MOR) system is involved in rewarding aspects of both food and physical exercise, yet interaction between endogenous opioid release following exercise and anticipatory food reward remains unresolved. Here we tested whether exercise-induced opioid release correlates with increased anticipatory reward processing in humans. We scanned 24 healthy lean men after rest and after a 1 h session of aerobic exercise with positron emission tomography (PET) using MOR-selective radioligand [11 C]carfentanil. After both PET scans, the subjects underwent a functional magnetic resonance imaging (fMRI) experiment where they viewed pictures of palatable versus nonpalatable foods to trigger anticipatory food reward responses. Exercise-induced changes in MOR binding in key regions of reward circuit (amygdala, thalamus, ventral and dorsal striatum, and orbitofrontal and cingulate cortices) were used to predict the changes in anticipatory reward responses in fMRI. Exercise-induced changes in MOR binding correlated negatively with the exercise-induced changes in neural anticipatory food reward responses in orbitofrontal and cingulate cortices, insula, ventral striatum, amygdala, and thalamus: higher exercise-induced opioid release predicted higher brain responses to palatable versus nonpalatable foods. We conclude that MOR activation following exercise may contribute to the considerable interindividual variation in food craving and consumption after exercise, which might promote compensatory eating and compromise weight control.
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Affiliation(s)
| | - Lauri Nummenmaa
- Turku PET Centre, University of Turku, Turku, Finland.,Department of Psychology, University of Turku, Turku, Finland
| | | | - Lauri Tuominen
- Turku PET Centre, University of Turku, Turku, Finland.,Department of Psychiatry, Massachusetts General Hospital, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts
| | | | | | - Jussi Hirvonen
- Turku PET Centre, University of Turku, Turku, Finland.,Department of Radiology, Turku University Hospital, Turku, Finland
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18
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Takashima Y, Fannon MJ, Galinato MH, Steiner NL, An M, Zemljic-Harpf AE, Somkuwar SS, Head BP, Mandyam CD. Neuroadaptations in the dentate gyrus following contextual cued reinstatement of methamphetamine seeking. Brain Struct Funct 2018; 223:2197-2211. [PMID: 29441405 PMCID: PMC5970030 DOI: 10.1007/s00429-018-1615-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 01/17/2018] [Indexed: 02/06/2023]
Abstract
Abstinence from unregulated methamphetamine self-administration increases hippocampal dependent, context-driven reinstatement of methamphetamine seeking. The current study tested the hypothesis that alterations in the functional properties of granule cell neurons (GCNs) in the dentate gyrus (DG) of the hippocampus in concert with altered expression of synaptic plasticity-related proteins and ultrastructural changes in the DG are associated with enhanced context-driven methamphetamine-seeking behavior. Whole-cell patch-clamp recordings were performed in acute brain slices from methamphetamine naïve (controls) and methamphetamine experienced animals (during acute withdrawal, during abstinence, after extinction and after reinstatement). Spontaneous excitatory postsynaptic currents (sEPSCs) and intrinsic excitability were recorded from GCNs. Reinstatement of methamphetamine seeking increased sEPSC frequency and produced larger amplitude responses in GCNs compared to controls and all other groups. Reinstatement of methamphetamine seeking reduced spiking capability in GCNs compared to controls, and all other groups, as indicated by reduced intrinsic spiking elicited by increasing current injections, membrane resistance and fast after hyperpolarization. In rats that reinstated methamphetamine seeking, these altered electrophysiological properties of GCNs were associated with enhanced expression of Fos, GluN2A subunits and PSD95 and reduced expression of GABAA subunits in the DG and enhanced expression of synaptic PSD in the molecular layer. The alterations in functional properties of GCNs and plasticity related proteins in the DG paralleled with no changes in structure of microglial cells in the DG. Taken together, our results demonstrate that enhanced reinstatement of methamphetamine seeking results in alterations in intrinsic spiking and spontaneous glutamatergic synaptic transmission in the GCNs and concomitant increases in neuronal activation of GCNs, and expression of GluNs and decreases in GABAA subunits that may contribute to the altered synaptic connectivity-neuronal circuitry-and activity in the hippocampus, and enhance propensity for relapse.
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Affiliation(s)
- Yoshio Takashima
- Department of Neuroscience, University of California San Diego, San Diego, CA, USA
- Department of Anesthesiology, University of California San Diego, San Diego, CA, USA
| | | | - Melissa H Galinato
- Department of Neuroscience, University of California San Diego, San Diego, CA, USA
- VA San Diego Healthcare System, San Diego, CA, USA
| | | | - Michelle An
- VA San Diego Healthcare System, San Diego, CA, USA
| | - Alice E Zemljic-Harpf
- Department of Anesthesiology, University of California San Diego, San Diego, CA, USA
- VA San Diego Healthcare System, San Diego, CA, USA
| | | | - Brian P Head
- Department of Anesthesiology, University of California San Diego, San Diego, CA, USA
- VA San Diego Healthcare System, San Diego, CA, USA
| | - Chitra D Mandyam
- Department of Neuroscience, University of California San Diego, San Diego, CA, USA.
- Department of Anesthesiology, University of California San Diego, San Diego, CA, USA.
- VA San Diego Healthcare System, San Diego, CA, USA.
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19
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Abstract
Accumulating research in rodents and humans indicates that exercise benefits brain function and may prevent or delay onset of neurodegenerative conditions. In particular, exercise modifies the structure and function of the hippocampus, a brain area important for learning and memory. This review addresses the central and peripheral mechanisms underlying the beneficial effects of exercise on the hippocampus. We focus on running-induced changes in adult hippocampal neurogenesis, neural circuitry, neurotrophins, synaptic plasticity, neurotransmitters, and vasculature. The role of peripheral factors in hippocampal plasticity is also highlighted. We discuss recent evidence that systemic factors released from peripheral organs such as muscle (myokines), liver (hepatokines), and adipose tissue (adipokines) during exercise contribute to hippocampal neurotrophin and neurogenesis levels, and memory function. A comprehensive understanding of the body-brain axis is needed to elucidate how exercise improves hippocampal plasticity and cognition.
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Affiliation(s)
- C'iana Cooper
- Neuroplasticity and Behavior Unit, Laboratory of Neurosciences, National Institute on Aging, National Institutes of Health, Biomedical Research Center, Baltimore, Maryland 21224
| | - Hyo Youl Moon
- Neuroplasticity and Behavior Unit, Laboratory of Neurosciences, National Institute on Aging, National Institutes of Health, Biomedical Research Center, Baltimore, Maryland 21224
- Institute of Sport Science, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Henriette van Praag
- Neuroplasticity and Behavior Unit, Laboratory of Neurosciences, National Institute on Aging, National Institutes of Health, Biomedical Research Center, Baltimore, Maryland 21224
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20
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Smith MA, Fronk GE, Abel JM, Lacy RT, Bills SE, Lynch WJ. Resistance exercise decreases heroin self-administration and alters gene expression in the nucleus accumbens of heroin-exposed rats. Psychopharmacology (Berl) 2018; 235:1245-1255. [PMID: 29396617 PMCID: PMC5871570 DOI: 10.1007/s00213-018-4840-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 01/21/2018] [Indexed: 12/11/2022]
Abstract
RATIONALE Preclinical studies consistently report that aerobic exercise decreases drug self-administration and other forms of drug-seeking behavior; however, relatively few studies have examined other types of physical activity. OBJECTIVES The purpose of the present study was to examine the effects of resistance exercise (i.e., strength training) on heroin self-administration and mRNA expression of genes known to mediate opioid reinforcement and addictive behavior in the nucleus accumbens (NAc) of heroin-exposed rats. METHODS Female rats were obtained during late adolescence and divided into two groups. Resistance exercise rats were trained to climb a vertical ladder wearing a weighted vest; sedentary control rats were placed repeatedly on the ladder oriented horizontally on its side. All rats were implanted with intravenous catheters and trained to self-administer heroin on a fixed ratio (FR1) schedule of reinforcement. mRNA expression in the NAc core and shell was examined following behavioral testing. RESULTS Resistance exercise significantly decreased heroin self-administration, resulting in a downward shift in the dose-effect curve. Resistance exercise also reduced mRNA expression for mu opioid receptors and dopamine D1, D2, and D3 receptors in the NAc core. Resistance exercise increased mRNA expression of dopamine D5 receptors in the NAc shell and increased mRNA expression of brain-derived neurotrophic factor (exons I, IIB, IIC, IV, VI, IX) in the NAc core. CONCLUSIONS These data indicate that resistance exercise decreases the positive reinforcing effects of heroin and produces changes in opioid and dopamine systems in the NAc of heroin-exposed rats.
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Affiliation(s)
- Mark A Smith
- Department of Psychology, Davidson College, Davidson, NC, 28035, USA.
- Program in Neuroscience, Davidson College, Davidson, NC, USA.
| | - Gaylen E Fronk
- Department of Psychology, Davidson College, Davidson, NC, 28035, USA
| | - Jean M Abel
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, USA
| | - Ryan T Lacy
- Department of Psychology, Franklin and Marshall College, Lancaster, PA, USA
| | - Sarah E Bills
- Department of Psychology, Davidson College, Davidson, NC, 28035, USA
| | - Wendy J Lynch
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA, USA
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21
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Morais APD, Pita IR, Fontes‐Ribeiro CA, Pereira FC. The neurobiological mechanisms of physical exercise in methamphetamine addiction. CNS Neurosci Ther 2018; 24:85-97. [PMID: 29266758 PMCID: PMC6489779 DOI: 10.1111/cns.12788] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 11/28/2017] [Accepted: 11/30/2017] [Indexed: 12/15/2022] Open
Abstract
Methamphetamine (METH) is the primary drug within amphetamine-type stimulants which are the second most abused group of drugs worldwide. There is no pharmacological treatment addressed specifically to METH addiction, and behavioral therapy is shadowed by poor long-term recovery and relapse. Therefore, novel approaches to manage METH addiction are an urgent need. This review aims to describe the current state of physical exercise use on methamphetamine addiction management. The following searching terms in PubMed were used: ("physical exercise" OR "exercise") AND "methamphetamine." Relevant references from key publications and gray literature were also reviewed to identify additional citations for inclusion. Original investigation regarding physical exercise and methamphetamine addiction (clinical data) or neurobiological mechanisms of physical exercise in animal models of methamphetamine administration (preclinical data) was included. Overall, METH users demonstrated improvements, including better fitness and emotional measures, lower relapse rates, and sustained abstinence when compared to nonexercised individuals. The neurobiological mechanisms of physical exercise in METH users seem to reflect an interplay of several agents, including neurochemicals, oxidative stress, neurogenesis, gliogenesis, and blood-brain barrier as disclosed by preclinical data. Exercise-based interventions alone or as a conjoint therapy may be a useful tool for managing METH addiction.
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Affiliation(s)
- António Pedro Delgado Morais
- Institute of Pharmacology and Experimental Therapeutics/IBILIFaculty of MedicineUniversity of CoimbraCoimbraPortugal
| | - Inês Roque Pita
- Institute of Pharmacology and Experimental Therapeutics/IBILIFaculty of MedicineUniversity of CoimbraCoimbraPortugal
| | - Carlos Alberto Fontes‐Ribeiro
- Institute of Pharmacology and Experimental Therapeutics/IBILIFaculty of MedicineUniversity of CoimbraCoimbraPortugal
- CNC.IBILI—University of CoimbraCoimbraPortugal
| | - Frederico Costa Pereira
- Institute of Pharmacology and Experimental Therapeutics/IBILIFaculty of MedicineUniversity of CoimbraCoimbraPortugal
- CNC.IBILI—University of CoimbraCoimbraPortugal
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22
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Does exercise augment operant and Pavlovian extinction: A meta-analysis. J Psychiatr Res 2018; 96:73-93. [PMID: 28987515 DOI: 10.1016/j.jpsychires.2017.09.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 08/17/2017] [Accepted: 09/14/2017] [Indexed: 12/16/2022]
Abstract
BACKGROUND Exposure therapy, a behavioral approach to reduce symptomology in fear, anxiety, and drug-related psychiatric disorders, is based on learning and memory principles of extinction, and is subject to relapse. As such, it is important to find ways to enhance outcomes. One such way is through exercise. OBJECTIVES Identify if exercise augments extinction behavior, and whether this depends on the experimental paradigm used (i.e. operant or Pavlovian) and/or stimulus (i.e. appetitive or aversive). Additionally, determine which moderating variables influence the effects of exercise on extinction learning. METHODS A literature search was conducted and a Hedges' g calculation was employed to conduct a meta-analysis (metaSEM) using a structural equation modeling approach. This approach was chosen because of its ability to account for dependencies in effect sizes. RESULTS We found a significant effect of exercise as an augmentation over extinction alone (g = 0.37, p < 0.001), with extinction paradigm (but not stimulus) producing a moderating effect (B = 0.43, p = 0.030). Data were then split by extinction paradigm, with operant extinction models having a significant effect (g = 0.55, p < 0.001), and number of extinction sessions moderating aggregate effects. Pavlovian models did not have significant overall effects (g = 0.11, p = 0.3976), but were moderated by the number of animals housed together and exercise after extinction. CONCLUSIONS The effects of exercise on extinction learning are differentially modulated by the type of paradigm used, the number of extinction sessions, the timing of when exercise treatment was applied (after extinction), and the housing conditions.
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23
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Lynch WJ, Abel J, Robinson AM, Smith MA. Exercise as a Sex-Specific Treatment for Substance Use Disorder. CURRENT ADDICTION REPORTS 2017; 4:467-481. [PMID: 29404264 PMCID: PMC5796660 DOI: 10.1007/s40429-017-0177-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
PURPOSE OF REVIEW Exercise is a promising treatment for substance use disorder that may reduce withdrawal symptoms and prevent relapse. In this review, we discuss recent evidence from clinical and preclinical studies for its efficacy, from a behavioral to a molecular level, in order to understand the exercise conditions that lead to beneficial effects. We also highlight the few recent findings of sex-specific differences. RECENT FINDINGS Clinical and preclinical findings show that exercise decreases withdrawal symptoms, including craving, in both males and females. Evidence from clinical studies support the efficacy of exercise to prevent relapse to smoking, although further research is needed to examine sex differences, establish long-term efficacy, and to determine if effects extend to other substance use disorders. Preclinical findings also support the potential utility of exercise to prevent relapse with evidence suggesting that its efficacy is enhanced in males, and mediated by blocking drug-induced adaptations that occur during early abstinence. SUMMARY Sex differences and timing of exercise availability during abstinence should be considered in future studies examining exercise as an intervention for relapse. A better understanding of the neurobiological mechanisms underlying the efficacy of exercise to reduce withdrawal symptoms and prevent relapse is needed to guide its development as a sex-specific treatment.
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Affiliation(s)
- Wendy J Lynch
- Associate Professor of Psychiatry and Neurobehavioral Sciences University of Virginia: P.O. Box 801402, Charlottesville, VA 22904 434-243-0580 (phone); 434-973-7031 (fax)
| | - Jean Abel
- Assistant Professor of Psychiatry and Neurobehavioral Sciences University of Virginia; P.O. Box 801402, Charlottesville, VA 22904-1402 434) 243-5767 (phone); 434-973-7031 (fax)
| | - Andrea M Robinson
- Postdoctoral Fellow of Psychology Davidson College: Box 7136 Davidson, NC 28035 704-894-3012 (phone); 704-894-2512 (fax)
| | - Mark A Smith
- Professor of Psychology Davidson College, Davidson, NC 28035 704-894-2470 (phone); 704-894-2512 (fax)
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24
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Lynch WJ, Tan L, Narmeen S, Beiter R, Brunzell DH. Exercise or saccharin during abstinence block estrus-induced increases in nicotine-seeking. Physiol Behav 2017; 203:33-41. [PMID: 29080668 DOI: 10.1016/j.physbeh.2017.10.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 09/29/2017] [Accepted: 10/23/2017] [Indexed: 12/11/2022]
Abstract
Recent evidence suggests that adolescent and young adult females may be particularly responsive to nicotine use interventions that include exercise or environmental enrichment. This possibility was addressed in the current study by comparing the efficacy of exercise versus non-exercise environmental enrichment (saccharin) during abstinence at reducing subsequent nicotine-seeking/relapse vulnerability in an adolescent-onset rat model. The efficacy of each intervention was examined as a function of estrous cycle phase given findings indicating that hormonal status influences relapse vulnerability and treatment outcome in females. Once adolescent female rats acquired nicotine self-administration, they were given 23-h/day access to nicotine (0.01mg/kg/infusion) for 10days. Following the last self-administration session, rats began a 10-day forced abstinence period with 2-h/day access to an unlocked wheel (exercise, n=15), a bottle containing a saccharin-sweetened solution (0.25%; saccharin, n=19), or without access to a wheel or saccharin (control, n=20). Nicotine-seeking, as assessed under an extinction/cued-induced reinstatement procedure, was examined on day 11 of abstinence. Levels of nicotine-seeking were highest in females tested during estrus as compared to females tested during non-estrus phases. Exercise or saccharin during abstinence reduced nicotine-seeking in females tested during estrus, but neither affected the low levels of nicotine-seeking observed in females tested during non-estrus phases, presumably due to a floor effect. These results demonstrate that exercise or saccharin during abstinence decrease nicotine-seeking, and suggest that either would be effective as an early intervention for nicotine use and addiction in females.
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Affiliation(s)
- Wendy J Lynch
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA 22902, USA.
| | - Lillian Tan
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA 22902, USA
| | - Syeda Narmeen
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA 22902, USA
| | - Rebecca Beiter
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA 22902, USA
| | - Darlene H Brunzell
- Department of Pharmacology and Toxicology, Virginia Commonwealth University, Richmond, VA 23298, USA
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Abstract
An increasing emphasis has been placed on the development and use of animal models of addiction that capture defining features of human drug addiction, including escalation/binge drug use, enhanced motivation for the drug, preference for the drug over other reward options, use despite negative consequences, and enhanced drug-seeking/relapse vulnerability. The need to examine behavior in both males and females has also become apparent given evidence demonstrating that the addiction process occurs differently in males and females. This review discusses the procedures that are used to model features of addiction in animals, as well as factors that influence their development. Individual differences are also discussed, with a particular focus on sex differences. While no one procedure consistently produces all characteristics, different models have been developed to focus on certain characteristics. A history of escalating/binge patterns of use appears to be critical for producing other features characteristic of addiction, including an enhanced motivation for the drug, enhanced drug seeking, and use despite negative consequences. These characteristics tend to emerge over abstinence, and appear to increase rather than decrease in magnitude over time. In females, these characteristics develop sooner during abstinence and/or following less drug exposure as compared to males, and for psychostimulant addiction, may require estradiol. Although preference for the drug over other reward options has been demonstrated in non-human primates, it has been more difficult to establish in rats. Future research is needed to define the parameters that optimally induce each of these features of addiction in the majority of animals. Such models are essential for advancing our understanding of human drug addiction and its treatment in men and women.
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Affiliation(s)
- Wendy J Lynch
- Department of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA 22904, USA.
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Galaj E, Shukur A, Manuszak M, Newman K, Ranaldi R. No evidence that environmental enrichment during rearing protects against cocaine behavioral effects but as an intervention reduces an already established cocaine conditioned place preference. Pharmacol Biochem Behav 2017; 156:56-62. [DOI: 10.1016/j.pbb.2017.04.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 04/12/2017] [Accepted: 04/14/2017] [Indexed: 12/13/2022]
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27
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Motta SC, Carobrez AP, Canteras NS. The periaqueductal gray and primal emotional processing critical to influence complex defensive responses, fear learning and reward seeking. Neurosci Biobehav Rev 2017; 76:39-47. [DOI: 10.1016/j.neubiorev.2016.10.012] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 09/26/2016] [Accepted: 10/13/2016] [Indexed: 12/22/2022]
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Staples MC, Fannon MJ, Mysore KK, Dutta RR, Ongjoco AT, Quach LW, Kharidia KM, Somkuwar SS, Mandyam CD. Dietary restriction reduces hippocampal neurogenesis and granule cell neuron density without affecting the density of mossy fibers. Brain Res 2017; 1663:59-65. [PMID: 28284897 DOI: 10.1016/j.brainres.2017.02.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2016] [Revised: 02/04/2017] [Accepted: 02/27/2017] [Indexed: 11/25/2022]
Abstract
The hippocampal formation undergoes significant morphological and functional changes after prolonged caloric and dietary restriction (DR). In this study we tested whether prolonged DR results in deleterious alterations in hippocampal neurogenesis, density of granule cell neurons and mossy fibers, all of which support plasticity in the dentate gyrus. Young adult animals either experienced free access to food (control condition), or every-other-day feeding regimen (DR condition) for 3months. The number of Ki-67 cells and 28-day old 5-bromo-2'-deoxyuridine (BrdU) cells were quantified in the dorsal and ventral dentate gyrus to determine the effect of DR on cellular proliferation and survival of neural progenitor cells in the anatomically defined regions of the dentate gyrus. The density of granule cell neurons and synaptoporin were also quantified to determine the effect of DR on granule cell neurons and mossy fiber projections in the dentate gyrus. Our results show that DR increases cellular proliferation and concurrently reduces survival of newly born neurons in the ventral dentate gyrus without effecting the number of cells in the dorsal dentate gyrus. DR reduced density of granule cell neurons in the dorsal dentate gyrus. These alterations in the number of granule cell neurons did not affect mossy fiber density in DR animals, which was visualized as no differences in synaptoporin expression. Our findings demonstrate that granule cell neurons in the dentate gyrus are vulnerable to chronic DR and that the reorganization of granule cells in the dentate gyrus subregions is not producing concomitant alterations in dentate gyrus neuronal circuitry with this type of DR.
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Affiliation(s)
- Miranda C Staples
- Veterans Medical Research Foundation, VA San Diego Healthcare System, La Jolla, CA, USA
| | - McKenzie J Fannon
- Veterans Medical Research Foundation, VA San Diego Healthcare System, La Jolla, CA, USA
| | - Karthik K Mysore
- Veterans Medical Research Foundation, VA San Diego Healthcare System, La Jolla, CA, USA
| | - Rahul R Dutta
- Veterans Medical Research Foundation, VA San Diego Healthcare System, La Jolla, CA, USA
| | - Alexandria T Ongjoco
- Veterans Medical Research Foundation, VA San Diego Healthcare System, La Jolla, CA, USA
| | - Leon W Quach
- Veterans Medical Research Foundation, VA San Diego Healthcare System, La Jolla, CA, USA
| | - Khush M Kharidia
- Veterans Medical Research Foundation, VA San Diego Healthcare System, La Jolla, CA, USA
| | - Sucharita S Somkuwar
- Veterans Medical Research Foundation, VA San Diego Healthcare System, La Jolla, CA, USA
| | - Chitra D Mandyam
- Veterans Medical Research Foundation, VA San Diego Healthcare System, La Jolla, CA, USA.
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Struik D, Fadda P, Zara T, Zamberletti E, Rubino T, Parolaro D, Fratta W, Fattore L. The anabolic steroid nandrolone alters cannabinoid self-administration and brain CB 1 receptor density and function. Pharmacol Res 2016; 115:209-217. [PMID: 27890818 DOI: 10.1016/j.phrs.2016.11.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 10/21/2016] [Accepted: 11/22/2016] [Indexed: 11/27/2022]
Abstract
Clinical and pre-clinical observations indicate that anabolic-androgenic steroids can induce neurobiological changes that alter the rewarding effects of drugs of abuse. In this study, we investigated the effect of the anabolic steroid nandrolone on the rewarding properties of the cannabinoid CB1 receptor agonist WIN55,212-2 (WIN) in rats. Lister Hooded male rats were treated intramuscularly with nandrolone (15mg/kg) or vehicle for 14 consecutive days, and then allowed to self-administer WIN (12.5μg/kg/infusion) intravenously. After reaching stable drug intake, self-administration behavior was extinguished to examine drug- and cue-induced reinstatement of cannabinoid-seeking behavior. Other behavioral parameters presumed to influence drug-taking and drug-seeking behaviors were examined to gain more insight into the behavioral specificity of nandrolone treatment. Finally, animals were sacrificed for analysis of CB1 receptor density and function in selected brain areas. We found that nandrolone-treated rats self-administered up to 2 times more cannabinoid than vehicle-treated rats, but behaved similarly to control rats when tested for drug- and cue-induced reinstatement of cannabinoid-seeking behavior. Enhanced cannabinoid intake by nandrolone-treated rats was not accompanied by changes in locomotor activity, sensorimotor gating, or memory function. However, our molecular data show that after chronic WIN self-administration nandrolone-treated rats display altered CB1 receptor density and function in selected brain areas. We hypothesize that increased cannabinoid self-administration in nandrolone-treated rats results from a nandrolone-induced decrease in reward function, which rats seem to compensate by voluntarily increasing their cannabinoid intake. Altogether, our findings corroborate the hypothesis that chronic exposure to anabolic-androgenic steroids induces dysfunction of the reward pathway in rats and might represent a potential risk factor for abuse of cannabis and other drugs in humans.
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Affiliation(s)
- Dicky Struik
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen 9713ZG, the Netherlands
| | - Paola Fadda
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria di Monserrato, SS 554Km 4,500, 09042 Monserrato, CA, Italy; Centre of Excellence "Neurobiology of Dependence", University of Cagliari, Cittadella Universitaria di Monserrato, SS 554 Km 4,500, 09042 Monserrato, CA, Italy
| | - Tamara Zara
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria di Monserrato, SS 554Km 4,500, 09042 Monserrato, CA, Italy
| | - Erica Zamberletti
- Department of Biotechnology and Life Sciences, and Neuroscience Center University of Insubria, Busto Arsizio, VA, Italy
| | - Tiziana Rubino
- Department of Biotechnology and Life Sciences, and Neuroscience Center University of Insubria, Busto Arsizio, VA, Italy
| | - Daniela Parolaro
- Department of Biotechnology and Life Sciences, and Neuroscience Center University of Insubria, Busto Arsizio, VA, Italy; Zardi Gori Foundation, Via Curtatone 25, Milano, Italy
| | - Walter Fratta
- Department of Biomedical Sciences, University of Cagliari, Cittadella Universitaria di Monserrato, SS 554Km 4,500, 09042 Monserrato, CA, Italy; Centre of Excellence "Neurobiology of Dependence", University of Cagliari, Cittadella Universitaria di Monserrato, SS 554 Km 4,500, 09042 Monserrato, CA, Italy
| | - Liana Fattore
- Centre of Excellence "Neurobiology of Dependence", University of Cagliari, Cittadella Universitaria di Monserrato, SS 554 Km 4,500, 09042 Monserrato, CA, Italy; CNR Institute of Neuroscience-Cagliari, National Research Council, Italy.
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30
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Trifilieff P, Ducrocq F, van der Veldt S, Martinez D. Blunted Dopamine Transmission in Addiction: Potential Mechanisms and Implications for Behavior. Semin Nucl Med 2016; 47:64-74. [PMID: 27987559 DOI: 10.1053/j.semnuclmed.2016.09.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Positron emission tomography (PET) imaging consistently shows blunted striatal dopamine release and decreased dopamine D2 receptor availability in addiction. Here, we review the preclinical and clinical studies indicating that this neurobiological phenotype is likely to be both a consequence of chronic drug consumption and a vulnerability factor in the development of addiction. We propose that, behaviorally, blunted striatal dopamine transmission could reflect the increased impulsivity and altered cost/benefit computations that are associated with addiction. The factors that influence blunted striatal dopamine transmission in addiction are unknown. Herein, we give an overview of various factors, genetic, environmental, and social, that are known to affect dopamine transmission and that have been associated with the vulnerability to develop addiction. Altogether, these data suggest that blunted dopamine transmission and decreased D2 receptor availability are biomarkers both for the development of addiction and resistance to treatment. These findings support the view that blunted dopamine reflects impulsive behavior and deficits in motivation, which lead to the escalation of drug use.
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Affiliation(s)
- Pierre Trifilieff
- Nutrition et Neurobiologie Intégrée, INRA UMR 1286, University of Bordeaux, Bordeaux, France.
| | - Fabien Ducrocq
- Nutrition et Neurobiologie Intégrée, INRA UMR 1286, University of Bordeaux, Bordeaux, France
| | - Suzanne van der Veldt
- Nutrition et Neurobiologie Intégrée, INRA UMR 1286, University of Bordeaux, Bordeaux, France; Department of Psychiatry, Douglas Mental Health University Institute, McGill University, Montreal, Canada
| | - Diana Martinez
- Department of Psychiatry, New York State Psychiatric Institute, Columbia University Medical College, New York, NY.
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31
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Galaj E, Manuszak M, Ranaldi R. Environmental enrichment as a potential intervention for heroin seeking. Drug Alcohol Depend 2016; 163:195-201. [PMID: 27125660 DOI: 10.1016/j.drugalcdep.2016.04.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 04/08/2016] [Accepted: 04/14/2016] [Indexed: 12/25/2022]
Abstract
BACKGROUND Heroin-related cues can trigger craving and relapse in addicts or heroin seeking in rats. In the present study we investigated whether environmental enrichment (EE) implemented after heroin exposure can reduce cue-induced reinstatement of heroin seeking and expression of heroin conditioned place preference. METHODS In Experiment 1, male Long Evans rats that already acquired a heroin self-administration habit, were housed in enriched or non-enriched environments, underwent extinction training and later were tested for cue-induced reinstatement of heroin seeking. In Experiment 2, rats were conditioned with heroin in one compartment of a CPP apparatus and saline in the other, exposed to 30days of enrichment or no enrichment and were later tested for heroin CPP. RESULTS The results showed that exposure to EE significantly reduced responding during the reinstatement test (Experiment 1) and prevented the expression of heroin CPP (Experiment 2). CONCLUSION Our findings suggest that EE can be an effective behavioral approach to diminish the effects of conditioned cues on heroin seeking.
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Affiliation(s)
- E Galaj
- CUNY, The Graduate Center, United States
| | - M Manuszak
- Queens College of the City University of New York, Department of Psychology, United States
| | - R Ranaldi
- CUNY, The Graduate Center, United States; Queens College of the City University of New York, Department of Psychology, United States.
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32
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Damghani F, Bigdeli I, Miladi-Gorji H, Fadaei A. Swimming exercise attenuates psychological dependence and voluntary methamphetamine consumption in methamphetamine withdrawn rats. IRANIAN JOURNAL OF BASIC MEDICAL SCIENCES 2016; 19:594-600. [PMID: 27482339 PMCID: PMC4951597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVES This study evaluated the effect of swimming exercise during spontaneous methamphetamine (METH) withdrawal on the anxiety, depression, obsessive-compulsive disorder (OCD) and voluntary METH consumption in METH-dependent rats. MATERIALS AND METHODS Male Wistar rats were repeatedly administered with bi-daily doses of METH (2 mg/kg, subcutaneous) over a period of 14 days. Exercised rats were submitted to swimming sessions (45 min/day, five days per week, for 14 days) during spontaneous METH-withdrawal. Then, all animals were tested for the assessment of anxiety by using the elevated plus-maze (EPM), the grooming behaviors (OCD), and depression using forced swimming test (FST) and voluntary METH consumption using a two-bottle choice (TBC) paradigm for the assessment of craving. RESULTS The results showed that the swimmer METH-withdrawn rats exhibited an increase in EPM open arm time and entries and a reduction of immobility and grooming behaviors compared with the sedentary METH groups. Also, voluntary METH consumption was less in the swimmer METH-withdrawn rats than the sedentary METH groups throughout 5-8 days. CONCLUSION This study showed that regular swimming exercise reduced voluntary METH consumption in animal models of craving by reducing anxiety, OCD, and depression in the METH-withdrawn rats. Thus, physical training may be ameliorating some of the withdrawal behavioral consequences of METH.
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Affiliation(s)
- Fatemeh Damghani
- Faculty of Psychology and Educational Sciences, University of Semnan, Semnan, Iran
| | - Imanollah Bigdeli
- Faculty of Educational Sciences and Psychology, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Hossein Miladi-Gorji
- Laboratory of Animal Addiction Models, Research Center and Department of Physiology, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran,Corresponding author: Hossein Miladi-Gorji. Laboratory of Animal Addiction Models, Research Center and Department of Physiology, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran. Fax: +98-23 33354186;
| | - Atefeh Fadaei
- Faculty of Psychology and Educational Sciences, University of Semnan, Semnan, Iran
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33
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Methamphetamine reduces expression of caveolin-1 in the dorsal striatum: Implication for dysregulation of neuronal function. Neuroscience 2016; 328:147-56. [PMID: 27138644 DOI: 10.1016/j.neuroscience.2016.04.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 03/30/2016] [Accepted: 04/25/2016] [Indexed: 12/15/2022]
Abstract
Role of striatal dopamine D1 receptors (D1Rs) in methamphetamine (Meth) taking and seeking is recognized from contingent Meth self-administration studies. For example, Meth increases levels of D1Rs in the dorsal striatum in animal models of Meth addiction, and blockade of striatal D1Rs decreased responding for Meth and reduced Meth priming-induced drug seeking. However, the mechanism underlying enhanced expression of striatal D1Rs in animals self-administering Meth is unknown and is hypothesized to involve maladaptive intracellular signal transduction mechanism via hyperphosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2). D1Rs are predominantly localized to detergent-resistant membrane/lipid raft fractions (MLR fraction), and in vitro studies indicate that D1R signaling and recycling is regulated by the MLR-resident protein caveolin-1 (Cav-1), in an endocytotic-dependent manner. Notably, expression of Cav-1 is inversely regulated by ERK1/2 activation, suggesting a signaling interplay among D1Rs, ERK1/2 and Cav-1. We therefore evaluated the effects of extended access Meth self-administration on expression of striatal D1Rs, activated ERK1/2 and Cav-1. We first report that Cav-1 is heavily expressed in neurons located in the dorsal striatum. We also report that extended access Meth produces compulsive-like unregulated intake of the drug, and these behavioral outcomes are associated with enhanced expression of D1Rs, increased activity of ERK1/2, and reduced Cav-1 expression in the dorsal striatum. These data suggest a possible cellular mechanism that involves Cav-1 regulation of D1R expression in response to escalated Meth intake, and how this response of altered D1Rs and enhanced ERK1/2 activation to Meth self-administration contributes to contingent-related processes such as addiction.
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Carroll ME, Smethells JR. Sex Differences in Behavioral Dyscontrol: Role in Drug Addiction and Novel Treatments. Front Psychiatry 2016; 6:175. [PMID: 26903885 PMCID: PMC4745113 DOI: 10.3389/fpsyt.2015.00175] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Accepted: 11/30/2015] [Indexed: 11/22/2022] Open
Abstract
The purpose of this review is to discuss recent findings related to sex differences in behavioral dyscontrol that lead to drug addiction, and clinical implications for humans are discussed. This review includes research conducted in animals and humans that reveals fundamental aspects of behavioral dyscontrol. The importance of sex differences in aspects of behavioral dyscontrol, such as impulsivity and compulsivity, is discussed as major determinants of drug addiction. Behavioral dyscontrol during adolescence is also an important consideration, as this is the time of onset for drug addiction. These vulnerability factors additively increase drug-abuse vulnerability, and they are integral aspects of addiction that covary and interact with sex differences. Sex differences in treatments for drug addiction are also reviewed in terms of their ability to modify the behavioral dyscontrol that underlies addictive behavior. Customized treatments to reduce behavioral dyscontrol are discussed, such as (1) using natural consequences such as non-drug rewards (e.g., exercise) to maintain abstinence, or using punishment as a consequence for drug use, (2) targeting factors that underlie behavioral dyscontrol, such as impulsivity or anxiety, by repurposing medications to relieve these underlying conditions, and (3) combining two or more novel behavioral or pharmacological treatments to produce additive reductions in drug seeking. Recent published work has indicated that factors contributing to behavioral dyscontrol are an important target for advancing our knowledge on the etiology of drug abuse, intervening with the drug addiction process and developing novel treatments.
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Affiliation(s)
| | - John R. Smethells
- Program in PharmacoNeuroImmunology, Department of Psychiatry, University of Minnesota, Minneapolis, MN, USA
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35
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Sex differences in drug addiction and response to exercise intervention: From human to animal studies. Front Neuroendocrinol 2016; 40:24-41. [PMID: 26182835 PMCID: PMC4712120 DOI: 10.1016/j.yfrne.2015.07.001] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 06/08/2015] [Accepted: 07/10/2015] [Indexed: 02/08/2023]
Abstract
Accumulated research supports the idea that exercise could be an option of potential prevention and treatment for drug addiction. During the past few years, there has been increased interest in investigating of sex differences in exercise and drug addiction. This demonstrates that sex-specific exercise intervention strategies may be important for preventing and treating drug addiction in men and women. However, little is known about how and why sex differences are found when doing exercise-induced interventions for drug addiction. In this review, we included both animal and human that pulled subjects from a varied age demographic, as well as neurobiological mechanisms that may highlight the sex-related differences in these potential to assess the impact of sex-specific roles in drug addiction and exercise therapies.
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36
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Lespine LF, Tirelli E. The protective effects of free wheel-running against cocaine psychomotor sensitization persist after exercise cessation in C57BL/6J mice. Neuroscience 2015; 310:650-64. [DOI: 10.1016/j.neuroscience.2015.10.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 09/28/2015] [Accepted: 10/04/2015] [Indexed: 01/03/2023]
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Thompson AB, Stolyarova A, Ying Z, Zhuang Y, Gómez-Pinilla F, Izquierdo A. Methamphetamine blocks exercise effects on Bdnf and Drd2 gene expression in frontal cortex and striatum. Neuropharmacology 2015; 99:658-64. [PMID: 26334786 PMCID: PMC5352165 DOI: 10.1016/j.neuropharm.2015.08.045] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 08/26/2015] [Accepted: 08/26/2015] [Indexed: 10/23/2022]
Abstract
Exposure to drugs of abuse can produce many neurobiological changes which may lead to increased valuation of rewards and decreased sensitivity to their costs. Many of these behavioral alterations are associated with activity of D2-expressing medium spiny neurons in the striatum. Additionally, Bdnf in the striatum has been shown to play a role in flexible reward-seeking behavior. Given that voluntary aerobic exercise can affect the expression of these proteins in healthy subjects, and that exercise has shown promise as an anti-addictive therapy, we set out to quantify changes in D2 and Bdnf expression in methamphetamine-exposed rats given access to running wheels. Sixty-four rats were treated for two weeks with an escalating dose of methamphetamine or saline, then either sacrificed, housed in standard cages, or given free access to a running wheel for 6 weeks prior to sacrifice. Rats treated with methamphetamine ran significantly greater distances than saline-treated rats, suggesting an augmentation in the reinforcement value of voluntary wheel running. Transcription of Drd2 and Bdnf was assessed via RT-qPCR. Protein expression levels of D2 and phosphorylation of the TrkB receptor were measured via western blot. Drd2 and Bdnf mRNA levels were impacted independently by exercise and methamphetamine, but exposure to methamphetamine prior to the initiation of exercise blocked the exercise-induced changes seen in rats treated with saline. Expression levels of both proteins were elevated immediately after methamphetamine, but returned to baseline after six weeks, regardless of exercise status.
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Affiliation(s)
- Andrew B Thompson
- Department of Psychology, University of California, Los Angeles 90095, USA
| | | | - Zhe Ying
- Department of Integrative Biology and Physiology, University of California, Los Angeles 90095, USA
| | - Yumei Zhuang
- Department of Integrative Biology and Physiology, University of California, Los Angeles 90095, USA
| | - Fernando Gómez-Pinilla
- Department of Integrative Biology and Physiology, University of California, Los Angeles 90095, USA; Department of Neurosurgery, University of California, Los Angeles 90095, USA
| | - Alicia Izquierdo
- Department of Psychology, University of California, Los Angeles 90095, USA.
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Somkuwar SS, Staples MC, Fannon MJ, Ghofranian A, Mandyam CD. Evaluating Exercise as a Therapeutic Intervention for Methamphetamine Addiction-Like Behavior. Brain Plast 2015; 1:63-81. [PMID: 29765835 PMCID: PMC5928557 DOI: 10.3233/bpl-150007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The need for effective treatments for addiction and dependence to the illicit stimulant methamphetamine in primary care settings is increasing, yet no effective medications have been FDA approved to reduce dependence [1]. This is partially attributed to the complex and dynamic neurobiology underlying the various stages of addiction [2]. Therapeutic strategies to treat methamphetamine addiction, particularly the relapse stage of addiction, could revolutionize methamphetamine addiction treatment. In this context, preclinical studies demonstrate that voluntary exercise (sustained physical activity) could be used as an intervention to reduce methamphetamine addiction. Therefore, it appears that methamphetamine disrupts normal functioning in the brain and this disruption is prevented or reduced by engaging in exercise. This review discusses animal models of methamphetamine addiction and sustained physical activity and the interactions between exercise and methamphetamine behaviors. The review highlights how methamphetamine and exercise affect neuronal plasticity and neurotoxicity in the adult mammalian striatum, hippocampus, and prefrontal cortex, and presents the emerging mechanisms of exercise in attenuating intake and in preventing relapse to methamphetamine seeking in preclinical models of methamphetamine addiction.
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Affiliation(s)
- Sucharita S Somkuwar
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
| | - Miranda C Staples
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
| | - McKenzie J Fannon
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
| | - Atoosa Ghofranian
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
| | - Chitra D Mandyam
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA, USA
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39
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Aarde SM, Miller ML, Creehan KM, Vandewater SA, Taffe MA. One day access to a running wheel reduces self-administration of D-methamphetamine, MDMA and methylone. Drug Alcohol Depend 2015; 151:151-8. [PMID: 25863714 PMCID: PMC4447594 DOI: 10.1016/j.drugalcdep.2015.03.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Revised: 03/09/2015] [Accepted: 03/15/2015] [Indexed: 01/05/2023]
Abstract
BACKGROUND Exercise influences drug craving and consumption in humans and drug self-administration in laboratory animals, but the effects can be variable. Improved understanding of how exercise affects drug intake or craving would enhance applications of exercise programs to human drug users attempting cessation. METHODS Rats were trained in the intravenous self-administration (IVSA) of D-methamphetamine (METH; 0.05 mg/kg/inf), 3,4-methylenedioxymethamphetamine (MDMA; 0.5 mg/kg/inf) or methylone (0.5 mg/kg/inf). Once IVSA was established, the effect of ∼ 22 h of wheel access in the home cage on subsequent drug taking was assessed in a two cohort crossover design. RESULTS Provision of home cage wheel access during the day prior to IVSA sessions significantly decreased the self-administration of METH, MDMA and methylone. At the individual level, there was no correlation between the amount a rat used the wheel and the size of the individual's decrease in drug intake. CONCLUSIONS Wheel access can reduce self-administration of a variety of psychomotor stimulants. It does so immediately, i.e., without a need for weeks of exercise prior to drug access. This study therefore indicates that future mechanistic investigations should focus on acute effects of exercise. In sum, the results predict that exercise programs can be used to decrease stimulant drug use in individuals even with no exercise history and an established drug taking pattern.
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Affiliation(s)
- Shawn M Aarde
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, SP30-2400, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Michelle L Miller
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, SP30-2400, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Kevin M Creehan
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, SP30-2400, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Sophia A Vandewater
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, SP30-2400, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Michael A Taffe
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, SP30-2400, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
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