1
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Gobira PH, Joca SR, Moreira FA. Roles of cannabinoid CB1 and CB2 receptors in the modulation of psychostimulant responses. Acta Neuropsychiatr 2024; 36:67-77. [PMID: 35993329 DOI: 10.1017/neu.2022.23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Addiction to psychostimulant drugs, such as cocaine, D-amphetamine, and methamphetamine, is a public health issue that substantially contributes to the global burden of disease. Psychostimulant drugs promote an increase in dopamine levels within the mesocorticolimbic system, which is central to the rewarding properties of such drugs. Cannabinoid receptors (CB1R and CB2R) are expressed in the main areas of this system and implicated in the neuronal mechanisms underlying the rewarding effect of psychostimulant drugs. Here, we reviewed studies focusing on pharmacological intervention targeting cannabinoid CB1R and CB2R and their interaction in the modulation of psychostimulant responses.
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Affiliation(s)
- P H Gobira
- Department of Biomolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - S R Joca
- Department of Biomolecular Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - F A Moreira
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
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2
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Jacotte-Simancas A, Molina PE, Gilpin NW. Repeated Mild Traumatic Brain Injury and JZL184 Produce Sex-Specific Increases in Anxiety-Like Behavior and Alcohol Consumption in Wistar Rats. J Neurotrauma 2023; 40:2427-2441. [PMID: 37503666 PMCID: PMC10649186 DOI: 10.1089/neu.2023.0088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/29/2023] Open
Abstract
Alcohol use disorder (AUD) is highly comorbid with traumatic brain injury (TBI). Previously, using a lateral fluid percussion model (LFP) (an open-head injury model) to generate a single mild to moderate traumatic brain injury (TBI) we showed that TBI produces escalation in alcohol drinking, that alcohol exposure negatively impacts TBI outcomes, and that the endocannabinoid degradation inhibitor (JZL184) confers significant protection from behavioral and neuropathological outcomes in male rodents. In the present study, we used a weight drop model (a closed-head injury model) to produce repeated mild TBI (rmTBI; three TBIs separated by 24 hours) in male and female rats to examine the sex-specific effects on anxiety-like behavior and alcohol consumption, and whether systemic treatment with JZL184 would reverse TBI effects on those behaviors. In two separate studies, adult male and female Wistar rats were subjected to rmTBI or sham procedure using the weight drop model. Physiological measures of injury severity were collected from all animals. Animals in both studies were allowed to consume alcohol using an intermittent 2-bottle choice procedure (12 pre-TBI sessions and 12 post-TBI sessions). Neurological severity and neurobehavioral scores (NSS and NBS, respectively) were tested 24 hours after the final injury. Anxiety-like behavior was tested at 37-38 days post-injury in Study 1-, and 6-8-days post-injury in Study 2. Our results show that females exhibited reduced respiratory rates relative to males with no significant differences between Sham and rmTBI, no effect of rmTBI or sex on righting reflex, and increased neurological deficits in rmTBI groups in both studies. In Study 1, rmTBI increased alcohol consumption in female but not male rats. Male rats consistently exhibited higher levels of anxiety-like behavior than females. The rmTBI did not affect anxiety-like behavior 37-38 days post-injury. In Study 2, rmTBI once again increased alcohol consumption in female but not male rats, and repeated systemic treatment with JZL184 did not affect alcohol consumption. Also in Study 2, rmTBI increased anxiety-like behavior in males but not females and repeated systemic treatment with JZL184 produced an unexpected increase in anxiety-like behavior 6-8 days post-injury. In summary, rmTBI increased alcohol consumption in female rats, systemic JZL184 treatment did not alter alcohol consumption, and both rmTBI and systemic JZL184 treatment increased anxiety-like behavior 6-8 days post-injury in males but not females, highlighting robust sex differences in rmTBI effects.
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Affiliation(s)
- Alejandra Jacotte-Simancas
- Department of Physiology, Louisiana State University Health Sciences Center, New Orleans, Louisiana, USA
- Alcohol and Drug of Abuse Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, Louisiana, USA
| | - Patricia E. Molina
- Department of Physiology, Louisiana State University Health Sciences Center, New Orleans, Louisiana, USA
- Alcohol and Drug of Abuse Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, Louisiana, USA
| | - Nicholas W. Gilpin
- Department of Physiology, Louisiana State University Health Sciences Center, New Orleans, Louisiana, USA
- Alcohol and Drug of Abuse Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, Louisiana, USA
- Southeast Louisiana VA Healthcare System, New Orleans, Louisiana, USA
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3
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Kouchaeknejad A, Van Der Walt G, De Donato MH, Puighermanal E. Imaging and Genetic Tools for the Investigation of the Endocannabinoid System in the CNS. Int J Mol Sci 2023; 24:15829. [PMID: 37958825 PMCID: PMC10648052 DOI: 10.3390/ijms242115829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 10/26/2023] [Accepted: 10/27/2023] [Indexed: 11/15/2023] Open
Abstract
As central nervous system (CNS)-related disorders present an increasing cause of global morbidity, mortality, and high pressure on our healthcare system, there is an urgent need for new insights and treatment options. The endocannabinoid system (ECS) is a critical network of endogenous compounds, receptors, and enzymes that contribute to CNS development and regulation. Given its multifaceted involvement in neurobiology and its significance in various CNS disorders, the ECS as a whole is considered a promising therapeutic target. Despite significant advances in our understanding of the ECS's role in the CNS, its complex architecture and extensive crosstalk with other biological systems present challenges for research and clinical advancements. To bridge these knowledge gaps and unlock the full therapeutic potential of ECS interventions in CNS-related disorders, a plethora of molecular-genetic tools have been developed in recent years. Here, we review some of the most impactful tools for investigating the neurological aspects of the ECS. We first provide a brief introduction to the ECS components, including cannabinoid receptors, endocannabinoids, and metabolic enzymes, emphasizing their complexity. This is followed by an exploration of cutting-edge imaging tools and genetic models aimed at elucidating the roles of these principal ECS components. Special emphasis is placed on their relevance in the context of CNS and its associated disorders.
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Affiliation(s)
| | | | | | - Emma Puighermanal
- Neuroscience Institute, Autonomous University of Barcelona, 08193 Bellaterra, Spain; (A.K.); (G.V.D.W.); (M.H.D.D.)
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4
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Kibret BG, Roberts A, Kneebone A, Embaby S, Fernandez J, Liu QR, Onaivi ES. Cannabinoid CB2 receptors modulate alcohol induced behavior, and neuro-immune dysregulation in mice. Behav Brain Res 2023; 448:114439. [PMID: 37061199 DOI: 10.1016/j.bbr.2023.114439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 04/17/2023]
Abstract
The identification of additional lipid mediators, enzymes, and receptors revealed an expanded endocannabinoid system (ECS) called the endocannabinoidome (eCBome). Furthermore, eCBome research using wild type and genetically modified mice indicate the involvement of this system in modulating alcohol induced neuroinflammatory alterations associated with behavioral impairments and the release of proinflammatory cytokines. We investigated the role of cannabinoid type 2 receptors (CB2Rs) in modulating behavioral and neuro-immune changes induced by alcohol using conditional knockout (cKO) mice with selective deletion of CB2Rs in dopamine neurons (DAT-Cnr2) and in microglia (Cx3Cr1-Cnr2) cKO mice. We used a battery of behavioral tests including locomotor and wheel running activity, rotarod performance test, and alcohol preference tests to evaluate behavioral changes induced by alcohol. ELISA assay was used, to detect alterations in IL-6, IL-1α, and IL-1β in the prefrontal cortex, striatum, and hippocampal regions of mice to investigate the role of CB2Rs in neuroinflammation induced by alcohol in the brain. The involvement of cannabinoid receptors in alcohol-induced behavior was also evaluated using the non-selective cannabinoid receptor mixed agonist WIN 55,212-2. The results showed that cell-type specific deletion of CB2Rs in dopamine neurons and microglia significantly and differentially altered locomotor activity and rotarod performance activities. The result also revealed that cell-type specific deletion of CB2Rs enhanced alcohol-induced inflammation, and WIN significantly reduced alcohol preference in all genotypes compared to the vehicle controls. These findings suggest that the involvement of CB2Rs in modulating behavioral and neuroinflammatory alterations induced by alcohol may be potential therapeutic targets in the treatment of alcohol use disorder.
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Affiliation(s)
- Berhanu Geresu Kibret
- Department of Biology, College of Science and Health, William Paterson University, Wayne, NJ 07470, USA.
| | - Aaliyah Roberts
- Department of Biology, College of Science and Health, William Paterson University, Wayne, NJ 07470, USA
| | - Adam Kneebone
- Department of Biology, College of Science and Health, William Paterson University, Wayne, NJ 07470, USA
| | - Shymaa Embaby
- Department of Biology, College of Science and Health, William Paterson University, Wayne, NJ 07470, USA
| | - Justin Fernandez
- Department of Biology, College of Science and Health, William Paterson University, Wayne, NJ 07470, USA
| | - Qing-Rong Liu
- Laboratory of Clinical Investigation, national Institute on Aging, National Institutes of Health, Baltimore, MD 21224, USA
| | - Emmanuel S Onaivi
- Department of Biology, College of Science and Health, William Paterson University, Wayne, NJ 07470, USA.
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5
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Jacotte-Simancas A, Molina P, Gilpin N. JZL184 increases anxiety-like behavior and does not reduce alcohol consumption in female rats after repeated mild traumatic brain injury. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.05.30.542943. [PMID: 37398130 PMCID: PMC10312513 DOI: 10.1101/2023.05.30.542943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Alcohol use disorder (AUD) is highly comorbid with traumatic brain injury (TBI). Previously, using a lateral fluid percussion model (LFP) (an open model of head injury) to generate a single mild to moderate traumatic brain injury (TBI), we showed that TBI produces escalation in alcohol drinking, that alcohol exposure negatively impacts TBI outcomes, and that the endocannabinoid degradation inhibitor (JZL184) confers significant protection from behavioral and neuropathological outcomes in male rodents. In the present study, we used a weight drop model (a closed model of head injury) to produce a repeated mild TBI (rmTBI, 3 TBIs, spaced by 24 hours) to examine the sex-specific effects on alcohol consumption and anxiety-like behavior in rats, and whether systemic treatment with JZL184 would reverse TBI effects on those behaviors in both sexes. In two separate studies, adult male and female Wistar rats were subjected to rmTBI or sham using the weight drop model. Physiological measures of injury severity were collected from all animals. Animals in both studies were allowed to consume alcohol using an intermittent 2-bottle choice procedure (12 pre-TBI sessions and 12 post-TBI sessions). Neurological severity and neurobehavioral scores (NSS and NBS, respectively) were tested 24 hours after the final injury. Anxiety-like behavior was tested at 37-38 days post-injury in Study 1, and 6-8 days post-injury in Study 2. Our results show that females exhibited reduced respiratory rates relative to males with no significant differences between Sham and rmTBI, no effect of rmTBI or sex on righting reflex, and increased neurological deficits in rmTBI groups in both studies. In Study 1, rmTBI increased alcohol consumption in female but not male rats. Male rats consistently exhibited higher levels of anxiety-like behavior than females. rmTBI did not affect anxiety-like behavior 37-38 days post-injury. In Study 2, rmTBI once again increased alcohol consumption in female but not male rats, and repeated systemic treatment with JZL184 did not affect alcohol consumption. Also in Study 2, rmTBI increased anxiety-like behavior in males but not females and repeated systemic treatment with JZL184 produced an unexpected increase in anxiety-like behavior 6-8 days post-injury. In summary, rmTBI increased alcohol consumption in female rats, systemic JZL184 treatment did not alter alcohol consumption, and both rmTBI and sub-chronic systemic JZL184 treatment increased anxiety-like behavior 6-8 days post-injury in males but not females, highlighting robust sex differences in rmTBI effects.
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Affiliation(s)
- Alejandra Jacotte-Simancas
- Department of Physiology, Louisiana State University Health Sciences Center, New Orleans, LA
- Alcohol and Drug of Abuse Center of Excellence, LSUHSC, New Orleans, LA
| | - Patricia Molina
- Department of Physiology, Louisiana State University Health Sciences Center, New Orleans, LA
- Alcohol and Drug of Abuse Center of Excellence, LSUHSC, New Orleans, LA
| | - Nicholas Gilpin
- Department of Physiology, Louisiana State University Health Sciences Center, New Orleans, LA
- Alcohol and Drug of Abuse Center of Excellence, LSUHSC, New Orleans, LA
- Southeast Louisiana VA Healthcare System, New Orleans, LA
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6
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Molecular Alterations of the Endocannabinoid System in Psychiatric Disorders. Int J Mol Sci 2022; 23:ijms23094764. [PMID: 35563156 PMCID: PMC9104141 DOI: 10.3390/ijms23094764] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/22/2022] [Accepted: 04/23/2022] [Indexed: 02/07/2023] Open
Abstract
The therapeutic benefits of the current medications for patients with psychiatric disorders contrast with a great variety of adverse effects. The endocannabinoid system (ECS) components have gained high interest as potential new targets for treating psychiatry diseases because of their neuromodulator role, which is essential to understanding the regulation of many brain functions. This article reviewed the molecular alterations in ECS occurring in different psychiatric conditions. The methods used to identify alterations in the ECS were also described. We used a translational approach. The animal models reproducing some behavioral and/or neurochemical aspects of psychiatric disorders and the molecular alterations in clinical studies in post-mortem brain tissue or peripheral tissues were analyzed. This article reviewed the most relevant ECS changes in prevalent psychiatric diseases such as mood disorders, schizophrenia, autism, attentional deficit, eating disorders (ED), and addiction. The review concludes that clinical research studies are urgently needed for two different purposes: (1) To identify alterations of the ECS components potentially useful as new biomarkers relating to a specific disease or condition, and (2) to design new therapeutic targets based on the specific alterations found to improve the pharmacological treatment in psychiatry.
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7
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Asth L, Santos AC, Moreira FA. The endocannabinoid system and drug-associated contextual memories. Behav Pharmacol 2022; 33:90-104. [PMID: 33491992 DOI: 10.1097/fbp.0000000000000621] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Drug abuse and addiction can be initiated and reinstated by contextual stimuli previously paired with the drug use. The influence exerted by the context on drug-seeking behaviour can be modelled in experimental animals with place-conditioning protocols. Here, we review the effects of cannabinoids in place conditioning and the therapeutic potential of the endocannabinoid system for interfering with drug-related memories. The phytocannabinoid Δ9-tetrahydrocannabinol (THC) tends to induce conditioned place preference (CPP) at low doses and conditioned place aversion at high doses; cannabidiol is devoid of any effect, yet it inhibits CPP induced by some drugs. Synthetic CB1 receptor agonists tend to recapitulate the biphasic profile observed with THC, whereas selective antagonists/inverse agonists inhibit CPP induced by cocaine, nicotine, alcohol and opioids. However, their therapeutic use is limited by potential psychiatric side effects. The CB2 receptor has also attracted attention, because selective CB2 receptor agonists inhibit cocaine-induced CPP. Inhibitors of endocannabinoid membrane transport and hydrolysis yield mixed results. In targeting the endocannabinoid system for developing new treatments for drug addiction, future research should focus on 'neutral' CB1 receptor antagonists and CB2 receptor agonists. Such compounds may offer a well-tolerated pharmacological profile and curb addiction by preventing drug-seeking triggered by conditioned contextual cues.
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Affiliation(s)
- Laila Asth
- Department of Pharmacology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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8
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Bornscheuer L, Lundin A, Forsell Y, Lavebratt C, Melas PA. The cannabinoid receptor-1 gene interacts with stressful life events to increase the risk for problematic alcohol use. Sci Rep 2022; 12:4963. [PMID: 35322131 PMCID: PMC8941304 DOI: 10.1038/s41598-022-08980-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 03/15/2022] [Indexed: 02/07/2023] Open
Abstract
Problematic alcohol use is a major contributor to the global burden of death and disabilities, and it represents a public health concern that has grown substantially following the COVID-19 pandemic. The available treatment options remain limited and to develop better pharmacotherapies for alcohol misuse we need to identify suitable biological targets. Previous research has implicated the brain’s endocannabinoid system (ECS) in psychiatric and stress-related outcomes, including substance use and habituation to repeated stress. Moreover, genetic variants in the cannabinoid-1 receptor gene (CNR1; CB1R) have been associated with personality traits, which are in turn predictors of substance use disorders. To date, however, no human genome-wide association study has provided evidence for an involvement of the ECS in substance use outcomes. One reason for this ECS-related “missing heritability” may be unexamined gene-environment interactions. To explore this possibility, we conducted cross-sectional analyses using DNA samples and stress-exposure data from a longitudinal Swedish population-based study (N = 2,915). Specifically, we genotyped rs2023239, a functional C/T single nucleotide polymorphism in CNR1, previously reported to be associated with CNR1 binding in the brain, subjective reward following alcohol intake, and alcohol cue-elicited brain activation. Our two outcomes of interest were (i) problematic alcohol use based on the Alcohol Use Disorders Identification Test (AUDIT), and (ii) personality trait scores based on the Five Factor Model. We found no baseline association between rs2023239 and problematic alcohol use or personality traits. However, there was a clear trend for interaction between rs2023239’s risk allele (C) and stressful life events (SLEs) in both childhood and adulthood, which predicted problematic alcohol use. Although not significant, there was also some indication that the risk allele interacted with child SLEs to increase scores on neuroticism. Our study supports the notion that the ECS can affect alcohol intake behaviors by interacting with life adversities and is—to the best of our knowledge—the first to focus on the interaction between CNR1 and stressors in both childhood and adulthood in humans. Further studies are warranted to confirm these findings.
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Affiliation(s)
- Lisa Bornscheuer
- Department of Public Health Sciences, Stockholm University, 10691, Stockholm, Sweden.,Center for Molecular Medicine, L8:00, Karolinska University Hospital, 17176, Stockholm, Sweden
| | - Andreas Lundin
- Department of Global Public Health, Karolinska Institutet, 17177, Stockholm, Sweden
| | - Yvonne Forsell
- Department of Global Public Health, Karolinska Institutet, 17177, Stockholm, Sweden
| | - Catharina Lavebratt
- Center for Molecular Medicine, L8:00, Karolinska University Hospital, 17176, Stockholm, Sweden.,Department of Molecular Medicine and Surgery, Karolinska Institutet, 17176, Stockholm, Sweden
| | - Philippe A Melas
- Center for Molecular Medicine, L8:00, Karolinska University Hospital, 17176, Stockholm, Sweden. .,Center for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet and Stockholm Health Care Services, 11364, Stockholm, Sweden.
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9
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Lovelock DF, Nguyen T, Van Voorhies K, Zhang Y, Besheer J. RTICBM-74 Is a Brain-Penetrant Cannabinoid Receptor Subtype 1 Allosteric Modulator that Reduces Alcohol Intake in Rats. J Pharmacol Exp Ther 2022; 380:153-161. [PMID: 34930820 PMCID: PMC11047052 DOI: 10.1124/jpet.121.000919] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 12/17/2021] [Indexed: 11/22/2022] Open
Abstract
The endocannabinoid system is implicated in the neuronal mechanisms of alcohol use disorder (AUD), with the cannabinoid receptor subtype 1 (CB1) representing a promising target for AUD therapeutic interventions. We have previously shown negative allosteric modulators (NAMs) of the CB1 receptor attenuated the reinstatement of other drugs of abuse including cocaine and methamphetamine in rats; however, their effects on alcohol-related behaviors have not been investigated. Here, we tested the pharmacokinetic properties of one such CB1 NAM, RTICBM-74, and its effects on alcohol self-administration in rats. RTICBM-74 showed low aqueous solubility and high protein binding but had excellent half-life and low clearance against rat liver microsomes and hepatocytes, and excellent brain penetrance in rats. RTICBM-74 pretreatment specifically reduced alcohol intake across a range of doses in male or female Wistar or Long-Evans rats that were trained to self-administer alcohol. These effects were similar to the CB1 antagonist/inverse agonist rimonabant, which was tested as a positive control. Importantly, RTICBM-74 was effective at reducing alcohol intake at doses that did not affect locomotion or sucrose self-administration. Our findings suggest that CB1 NAMs such as RTICBM-74 have promising therapeutic potential in treatment of AUD. SIGNIFICANCE STATEMENT: The present work shows that a metabolically stable and brain-penetrant cannabinoid receptor subtype 1 negative allosteric modulator reduces alcohol self-administration in rats without affecting locomotion or sucrose self-administration, suggesting potential therapeutic relevance for the treatment of alcohol use disorder.
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Affiliation(s)
- Dennis F Lovelock
- Bowles Center for Alcohol Studies (D.F.L., K.V.V., J.B.) and Department of Psychiatry (J.B.), University of North Carolina - Chapel Hill, Chapel Hill, North Carolina; and Research Triangle Institute, Research Triangle Park, North Carolina (T.N., Y.Z.)
| | - Thuy Nguyen
- Bowles Center for Alcohol Studies (D.F.L., K.V.V., J.B.) and Department of Psychiatry (J.B.), University of North Carolina - Chapel Hill, Chapel Hill, North Carolina; and Research Triangle Institute, Research Triangle Park, North Carolina (T.N., Y.Z.)
| | - Kalynn Van Voorhies
- Bowles Center for Alcohol Studies (D.F.L., K.V.V., J.B.) and Department of Psychiatry (J.B.), University of North Carolina - Chapel Hill, Chapel Hill, North Carolina; and Research Triangle Institute, Research Triangle Park, North Carolina (T.N., Y.Z.)
| | - Yanan Zhang
- Bowles Center for Alcohol Studies (D.F.L., K.V.V., J.B.) and Department of Psychiatry (J.B.), University of North Carolina - Chapel Hill, Chapel Hill, North Carolina; and Research Triangle Institute, Research Triangle Park, North Carolina (T.N., Y.Z.)
| | - Joyce Besheer
- Bowles Center for Alcohol Studies (D.F.L., K.V.V., J.B.) and Department of Psychiatry (J.B.), University of North Carolina - Chapel Hill, Chapel Hill, North Carolina; and Research Triangle Institute, Research Triangle Park, North Carolina (T.N., Y.Z.)
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10
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Chang HA, Dai W, Hu SSJ. Sex differences in cocaine-associated memory: The interplay between CB 1, mGluR5, and estradiol. Psychoneuroendocrinology 2021; 133:105366. [PMID: 34419761 DOI: 10.1016/j.psyneuen.2021.105366] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 07/16/2021] [Accepted: 07/22/2021] [Indexed: 10/20/2022]
Abstract
We know surprisingly little about the sex differences in the neurobiology of cocaine addiction, except females are more susceptible to the rewarding effects of cocaine than their male counterparts. Only a handful of recent studies have examined the neurobiology of cocaine-induced conditioned place preference (CPP) memory among female rodents. We contribute to this emerging line of research by documenting sex differences in cocaine-associated memory and illustrating the underlying signaling pathways in five experiments. Rimonabant (Rim), a cannabinoid CB1 antagonist and inverse agonist, exerted a facilitating effect for low-dose cocaine and an impairing effect for high-dose cocaine CPP memory in male mice, as in our previous study, but not in female mice. Nor did we observe the effect exist among CB1 knockout male mice, which indicated that the CB1 receptors played a mediating role. We also found that the metabotropic glutamate receptor 5 (mGluR5) was located in the same signaling pathway as CB1 in male mice. To clarify the mechanisms behind the sex differences, we used ovariectomized (OVX) female mice with estradiol benzoate (EB) replacement. In the OVX female mice, we showed that Rim-alone and EB-alone, but not Rim-and-EB-combined, facilitated the low-dose cocaine CPP memory. Moreover, 4-hydroxytamoxifen (4-OHT), an estrogen receptor (ER) antagonist, blocked Rim's and EB's facilitating effect. Finally, 2-methyl-6-(phenylethynyl)pyridine (MPEP), an mGluR5 antagonist, partially blocked EB's facilitating effect. In sum, we identified sex-specific effects of Rim on cocaine-induced CPP memory and the respective signaling pathways: mGluR5-CB1 for male mice and ER-mGluR5-CB1 for female mice. These findings may have merits for the development of sex-specific treatment for cocaine addiction.
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Affiliation(s)
- Heng-Ai Chang
- Department of Psychology, National Cheng Kung University, Tainan 70101, Taiwan; Institute of Basic Medical Sciences, National Cheng Kung University, Tainan 70101, Taiwan
| | - Wen Dai
- Department of Psychology, National Cheng Kung University, Tainan 70101, Taiwan
| | - Sherry Shu-Jung Hu
- Department of Psychology, National Cheng Kung University, Tainan 70101, Taiwan.
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11
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Marszalek-Grabska M, Smaga I, Surowka P, Grochecki P, Slowik T, Filip M, Kotlinska JH. Memantine Prevents the WIN 55,212-2 Evoked Cross-Priming of Ethanol-Induced Conditioned Place Preference (CPP). Int J Mol Sci 2021; 22:ijms22157940. [PMID: 34360704 PMCID: PMC8348856 DOI: 10.3390/ijms22157940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/22/2021] [Accepted: 07/23/2021] [Indexed: 11/16/2022] Open
Abstract
The activation of the endocannabinoid system controls the release of many neurotransmitters involved in the brain reward pathways, including glutamate. Both endocannabinoid and glutamate systems are crucial for alcohol relapse. In the present study, we hypothesize that N-methyl-D-aspartate (NMDA) glutamate receptors regulate the ability of a priming dose of WIN 55,212-2 to cross-reinstate ethanol-induced conditioned place preference (CPP). To test this hypothesis, ethanol-induced (1.0 g/kg, 10% w/v, i.p.) CPP (unbiased method) was established using male adult Wistar rats. After CPP extinction, one group of animals received WIN 55,212-2 (1.0 and 2.0 mg/kg, i.p.), the cannabinoid receptor 1 (CB1) agonist, or ethanol, and the other group received memantine (3.0 or 10 mg/kg, i.p.), the NMDA antagonist and WIN 55,212-2 on the reinstatement day. Our results showed that a priming injection of WIN 55,212-2 (2.0 mg/kg, i.p.) reinstated (cross-reinstated) ethanol-induced CPP with similar efficacy to ethanol. Memantine (3.0 or 10 mg/kg, i.p.) pretreatment blocked this WIN 55,212-2 effect. Furthermore, our experiments indicated that ethanol withdrawal (7 days withdrawal after 10 days ethanol administration) down-regulated the CNR1 (encoding CB1), GRIN1/2A (encoding GluN1 and GluN2A subunit of the NMDA receptor) genes expression in the prefrontal cortex and dorsal striatum, but up-regulated these in the hippocampus, confirming the involvement of these receptors in ethanol rewarding effects. Thus, our results show that the endocannabinoid system is involved in the motivational properties of ethanol, and glutamate may control cannabinoid induced relapse into ethanol seeking behavior.
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Affiliation(s)
- Marta Marszalek-Grabska
- Department of Experimental and Clinical Pharmacology, Medical University of Lublin, 20-090 Lublin, Poland;
| | - Irena Smaga
- Department of Drug Addiction Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, 31-343 Kraków, Poland; (I.S.); (M.F.)
| | - Paulina Surowka
- Affective Cognitive Neuroscience Laboratory, Department of Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, 31-343 Kraków, Poland;
| | - Pawel Grochecki
- Department of Pharmacology and Pharmacodynamics, Medical University of Lublin, 20-093 Lublin, Poland;
| | - Tymoteusz Slowik
- Experimental Medicine Center, Medical University of Lublin, 20-090 Lublin, Poland;
| | - Malgorzata Filip
- Department of Drug Addiction Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, 31-343 Kraków, Poland; (I.S.); (M.F.)
| | - Jolanta H. Kotlinska
- Department of Pharmacology and Pharmacodynamics, Medical University of Lublin, 20-093 Lublin, Poland;
- Correspondence:
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Abstract
Abstract
Purpose of Review
Current theories of alcohol use disorders (AUD) highlight the importance of Pavlovian and instrumental learning processes mainly based on preclinical animal studies. Here, we summarize available evidence for alterations of those processes in human participants with AUD with a focus on habitual versus goal-directed instrumental learning, Pavlovian conditioning, and Pavlovian-to-instrumental transfer (PIT) paradigms.
Recent Findings
The balance between habitual and goal-directed control in AUD participants has been studied using outcome devaluation or sequential decision-making procedures, which have found some evidence of reduced goal-directed/model-based control, but little evidence for stronger habitual responding. The employed Pavlovian learning and PIT paradigms have shown considerable differences regarding experimental procedures, e.g., alcohol-related or conventional reinforcers or stimuli.
Summary
While studies of basic learning processes in human participants with AUD support a role of Pavlovian and instrumental learning mechanisms in the development and maintenance of drug addiction, current studies are characterized by large variability regarding methodology, sample characteristics, and results, and translation from animal paradigms to human research remains challenging. Longitudinal approaches with reliable and ecologically valid paradigms of Pavlovian and instrumental processes, including alcohol-related cues and outcomes, are warranted and should be combined with state-of-the-art imaging techniques, computational approaches, and ecological momentary assessment methods.
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Oppong-Damoah A, Gannon BM, Murnane KS. The Endocannabinoid System and Alcohol Dependence: Will Cannabinoid Receptor 2 Agonism be More Fruitful than Cannabinoid Receptor 1 Antagonism? CNS & NEUROLOGICAL DISORDERS DRUG TARGETS 2021; 21:3-13. [PMID: 33573565 DOI: 10.2174/1871527320666210211115007] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 09/17/2020] [Accepted: 09/18/2020] [Indexed: 11/22/2022]
Abstract
Alcohol-use disorder (AUD) remains a major public health concern. In recent years, there has been a heightened interest in components of the endocannabinoid system for the treatment of AUD. Cannabinoid type 1 (CB1) receptors have been shown to modulate the rewarding effects of alcohol, reduce the abuse-related effects of alcohol, improve cognition, exhibit anti-inflammatory, and neuroprotective effects, which are all favorable properties of potential therapeutic candidates for the treatment of AUD. However, CB1 agonists have not been investigated for the treatment of AUD because they stimulate the motivational properties of alcohol, increase alcohol intake, and have the tendency to be abused. Preclinical data suggest significant potential for the use of CB1 antagonists to treat AUD; however, a clinical phase I/II trial with SR14716A (rimonabant), a CB1 receptor antagonist/inverse agonist showed that it produced serious neuropsychiatric adverse events such as anxiety, depression, and even suicidal ideation. This has redirected the field to focus on alternative components of the endocannabinoid system, including cannabinoid type 2 (CB2) receptor agonists as a potential therapeutic target for AUD. CB2 receptor agonists are of particular interest because they can modulate the reward pathway, reduce abuse-related effects of alcohol, reverse neuroinflammation, improve cognition, and exhibit anti-inflammatory and neuroprotective effects, without exhibiting the psychiatric side effects seen with CB1 antagonists. Accordingly, this article presents an overview of the studies reported in the literature that have investigated CB2 receptor agonists with regards to AUD and provides commentary as to whether this receptor is a worthy target for continued investigation.
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Affiliation(s)
- Aboagyewaah Oppong-Damoah
- Department of Pharmaceutical Sciences, Mercer University College of Pharmacy, Mercer University Health Sciences Center,United States
| | - Brenda Marie Gannon
- Department of Pharmaceutical Sciences, Mercer University College of Pharmacy, Mercer University Health Sciences Center,United States
| | - Kevin Sean Murnane
- Department of Pharmaceutical Sciences, Mercer University College of Pharmacy, Mercer University Health Sciences Center,United States
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Soundararajan S, Kazmi N, Brooks AT, Krumlauf M, Schwandt ML, George DT, Hodgkinson CA, Wallen GR, Ramchandani VA. FAAH and CNR1 Polymorphisms in the Endocannabinoid System and Alcohol-Related Sleep Quality. Front Psychiatry 2021; 12:712178. [PMID: 34566715 PMCID: PMC8458733 DOI: 10.3389/fpsyt.2021.712178] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 08/09/2021] [Indexed: 12/02/2022] Open
Abstract
Sleep disturbances are common among individuals with alcohol use disorder (AUD) and may not resolve completely with short-term abstinence from alcohol, potentially contributing to relapse to drinking. The endocannabinoid system (ECS) is associated with both sleep and alcohol consumption, and genetic variation in the ECS may underlie sleep-related phenotypes among individuals with AUD. In this study, we explored the influence of genetic variants in the ECS (Cannabinoid receptor 1/CNR1: rs806368, rs1049353, rs6454674, rs2180619, and Fatty Acid Amide Hydrolase/FAAH rs324420) on sleep quality in individuals with AUD (N = 497) and controls without AUD (N = 389). We assessed subjective sleep quality (from the Pittsburgh Sleep Quality Index/PSQI) for both groups at baseline and objective sleep efficiency and duration (using actigraphy) in a subset of individuals with AUD at baseline and after 4 weeks of inpatient treatment. We observed a dose-dependent relationship between alcohol consumption and sleep quality in both AUD and control groups. Sleep disturbance, a subscale measure in PSQI, differed significantly among CNR1 rs6454674 genotypes in both AUD (p = 0.015) and controls (p = 0.016). Only among controls, neuroticism personality scores mediated the relationship between genotype and sleep disturbance. Objective sleep measures (sleep efficiency, wake bouts and wake after sleep onset), differed significantly by CNR1 rs806368 genotype, both at baseline (p = 0.023, 0.029, 0.015, respectively) and at follow-up (p = 0.004, p = 0.006, p = 0.007, respectively), and by FAAH genotype for actigraphy recorded sleep duration at follow-up (p = 0.018). These relationships suggest a significant role of the ECS in alcohol-related sleep phenotypes.
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Affiliation(s)
- Soundarya Soundararajan
- Human Psychopharmacology Laboratory, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, United States
| | - Narjis Kazmi
- National Institutes of Health Clinical Center, Bethesda, MD, United States
| | - Alyssa T Brooks
- National Institutes of Health Clinical Center, Bethesda, MD, United States
| | - Michael Krumlauf
- National Institutes of Health Clinical Center, Bethesda, MD, United States
| | - Melanie L Schwandt
- Office of the Clinical Director, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, United States
| | - David T George
- Office of the Clinical Director, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, United States
| | - Colin A Hodgkinson
- Laboratory of Neurogenetics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, United States
| | - Gwenyth R Wallen
- National Institutes of Health Clinical Center, Bethesda, MD, United States
| | - Vijay A Ramchandani
- Human Psychopharmacology Laboratory, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, United States
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Hauser SR, Katner SN, Waeiss RA, Truitt WA, Bell RL, McBride WJ, Rodd ZA. Selective breeding for high alcohol preference is associated with increased sensitivity to cannabinoid reward within the nucleus accumbens shell. Pharmacol Biochem Behav 2020; 197:173002. [PMID: 32710885 DOI: 10.1016/j.pbb.2020.173002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 07/20/2020] [Accepted: 07/20/2020] [Indexed: 11/30/2022]
Abstract
RATIONALE The rate of cannabinoid intake by those with alcohol use disorder (AUD) exceeds that of the general public. The high prevalence of co-abuse of alcohol and cannabis has been postulated to be predicated upon both a common predisposing genetic factor and the interaction of the drugs within the organism. The current experiments examined the effects of cannabinoids in an animal model of AUD. OBJECTIVES The present study assessed the reinforcing properties of a cannabinoid receptor 1 (CB1) agonist self-administered directly into the nucleus accumbens shell (AcbSh) in female Wistar and alcohol-preferring (P) rats. METHODS Following guide cannulae surgery aimed at AcbSh, subjects were placed in an operant box equipped with an 'active lever' (fixed ratio 1; FR1) that caused the delivery of the infusate and an 'inactive lever' that did not. Subjects were arbitrarily assigned to one of seven groups that self-administered either artificial cerebrospinal fluid (aCSF), or 3.125, 6.25, 12.5, or 25 pmol/100 nl of O-1057, a water-soluble CB1 agonist, dissolved in aCSF. The first four sessions of acquisition are followed by aCSF only infusates in sessions 5 and 6 during extinction, and finally the acquisition dose of infusate during session 7 as reinstatement. RESULTS The CB1 agonist was self-administered directly into the AcbSh. P rats self-administered the CB1 agonist at lower concentrations and at higher rates compared to Wistar rats. CONCLUSIONS Overall, the data indicate selective breeding for high alcohol preference has produced rats divergent in response to cannabinoids within the brain reward pathway. The data support the hypothesis that there can be common genetic factors influencing drug addiction.
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Affiliation(s)
- Sheketha R Hauser
- Department of Psychiatry, Institute of Psychiatric Research, Indiana University School of Medicine, Indianapolis, IN, USA; Paul and Carole Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, USA.
| | - Simon N Katner
- Department of Psychiatry, Institute of Psychiatric Research, Indiana University School of Medicine, Indianapolis, IN, USA; Paul and Carole Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Robert A Waeiss
- Department of Psychiatry, Institute of Psychiatric Research, Indiana University School of Medicine, Indianapolis, IN, USA; Paul and Carole Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, USA
| | - William A Truitt
- Paul and Carole Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, USA; Department of Anatomy, Cell Biology & Physiology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Richard L Bell
- Department of Psychiatry, Institute of Psychiatric Research, Indiana University School of Medicine, Indianapolis, IN, USA; Paul and Carole Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, USA
| | - William J McBride
- Department of Psychiatry, Institute of Psychiatric Research, Indiana University School of Medicine, Indianapolis, IN, USA; Paul and Carole Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Zachary A Rodd
- Department of Psychiatry, Institute of Psychiatric Research, Indiana University School of Medicine, Indianapolis, IN, USA; Paul and Carole Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, USA
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Go J, Ryu YK, Park HY, Choi DH, Choi YK, Hwang DY, Lee CH, Kim KS. NQO1 regulates pharmaco-behavioral effects of d-amphetamine in striatal dopaminergic system in mice. Neuropharmacology 2020; 170:108039. [PMID: 32165217 DOI: 10.1016/j.neuropharm.2020.108039] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 02/11/2020] [Accepted: 03/04/2020] [Indexed: 11/18/2022]
Abstract
The NAD(P)H:quinone oxidoreductase 1 (NQO1) gene encodes a cytosolic flavoenzyme that catalyzes the two-electron reduction of quinones to hydroquinones. A polymorphic form of NQO1 is associated with mood disorders such as schizophrenia. However, the role of NQO1 in dopaminergic system has not yet been elucidated. To determine the role of NQO1 in the dopaminergic system, we investigated pharmaco-behavioral effects of d-amphetamine using NQO1-deficienct mice. According to our comparative study involving NQO1+/+ and NQO1-/- mice, NQO1 deficiency increased d-amphetamine-induced psychomotor activity and psychological dependency compared to wild-type mice. Basal and d-amphetamine-induced dopamine levels were also enhanced by NQO1 deficiency. In NQO1-/- mice, neural activation induced by d-amphetamine was higher in dorsolateral striatum, but not in dorsomedial and ventral striata. Although protein level of CaMKIIα, which is a key player in amphetamine-induced dopamine efflux, was decreased in striata of NQO1-/- mice, phosphorylation of CaMKIIα was markedly enhanced in NQO1-/- mice compared to wild-type mice. Interestingly, experiments with pharmacological antagonist showed that D2 antagonist-induced suppression of locomotion required activation of NQO1. Moreover, the rewarding effect in response to D1 agonist was increased by NQO1 deficiency. These results suggest that striatal NQO1 is of considerable interest to understand the mechanism of dopaminergic regulation of psychiatric disorders.
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Affiliation(s)
- Jun Go
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea; Department of Biomaterials Science, College of Natural Resources and Life Science/Life and Industry Convergence Research Institute, Pusan National University, Miryang, 50463, Republic of Korea
| | - Young-Kyoung Ryu
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea; College of Biosciences & Biotechnology, Chung-Nam National University, Daejeon, 34134, Republic of Korea
| | - Hye-Yeon Park
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea; Department of Brain & Cognitive Sciences, Ewha Womans University, Seoul, 03760, Republic of Korea
| | - Dong-Hee Choi
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea
| | - Young-Keun Choi
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea
| | - Dae Youn Hwang
- Department of Biomaterials Science, College of Natural Resources and Life Science/Life and Industry Convergence Research Institute, Pusan National University, Miryang, 50463, Republic of Korea
| | - Chul-Ho Lee
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea; Department of Functional Genomics, University of Science and Technology, Daejeon, 34113, Republic of Korea.
| | - Kyoung-Shim Kim
- Laboratory Animal Resource Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, Republic of Korea; Department of Functional Genomics, University of Science and Technology, Daejeon, 34113, Republic of Korea.
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Kunos G. Interactions Between Alcohol and the Endocannabinoid System. Alcohol Clin Exp Res 2020; 44:790-805. [PMID: 32056226 DOI: 10.1111/acer.14306] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Accepted: 02/05/2020] [Indexed: 12/12/2022]
Abstract
Endocannabinoids are lipid mediators that interact with the same cannabinoid receptors that recognize Δ9 -tetrahydrocannabinol (THC), the psychoactive constituent of marijuana, to induce similar effects in the brain and periphery. Alcohol and THC are both addictive substances whose acute use elicits rewarding effects that can lead to chronic and compulsive use via engaging similar signaling pathways in the brain. In the liver, both alcohol and endocannabinoids activate lipogenic gene expression leading to fatty liver disease. This review focuses on evidence accumulated over the last 2 decades to indicate that both the addictive neural effects of ethanol and its organ toxic effects in the liver and elsewhere are mediated, to a large extent, by endocannabinoids signaling via cannabinoid-1 receptors (CB1 R). The therapeutic potential of CB1 R blockade globally or in peripheral tissues only is also discussed.
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Affiliation(s)
- George Kunos
- From the, Division of Clinical and Biological Research, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, Maryland
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18
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Neasta J, Darcq E, Jeanblanc J, Carnicella S, Ben Hamida S. GPCR and Alcohol-Related Behaviors in Genetically Modified Mice. Neurotherapeutics 2020; 17:17-42. [PMID: 31919661 PMCID: PMC7007453 DOI: 10.1007/s13311-019-00828-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
G protein-coupled receptors (GPCRs) constitute the largest class of cell surface signaling receptors and regulate major neurobiological processes. Accordingly, GPCRs represent primary targets for the treatment of brain disorders. Several human genetic polymorphisms affecting GPCRs have been associated to different components of alcohol use disorder (AUD). Moreover, GPCRs have been reported to contribute to several features of alcohol-related behaviors in animal models. Besides traditional pharmacological tools, genetic-based approaches mostly aimed at deleting GPCR genes provided substantial information on how key GPCRs drive alcohol-related behaviors. In this review, we summarize the alcohol phenotypes that ensue from genetic manipulation, in particular gene deletion, of key GPCRs in rodents. We focused on GPCRs that belong to fundamental neuronal systems that have been shown as potential targets for the development of AUD treatment. Data are reviewed with particular emphasis on alcohol reward, seeking, and consumption which are behaviors that capture essential aspects of AUD. Literature survey indicates that in most cases, there is still a gap in defining the intracellular transducers and the functional crosstalk of GPCRs as well as the neuronal populations in which their signaling regulates alcohol actions. Further, the implication of only a few orphan GPCRs has been so far investigated in animal models. Combining advanced pharmacological technologies with more specific genetically modified animals and behavioral preclinical models is likely necessary to deepen our understanding in how GPCR signaling contributes to AUD and for drug discovery.
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Affiliation(s)
- Jérémie Neasta
- Laboratoire de Pharmacologie, Faculté de Pharmacie, University of Montpellier, 34093, Montpellier, France
| | - Emmanuel Darcq
- Douglas Hospital Research Center, Department of Psychiatry, McGill University, 6875 Boulevard LaSalle, Montreal, Quebec, H4H 1R3, Canada
| | - Jérôme Jeanblanc
- Research Group on Alcohol and Pharmacodependences-INSERM U1247, University of Picardie Jules Verne, 80025, Amiens, France
| | - Sebastien Carnicella
- INSERM U1216, Grenoble Institut des Neurosciences (GIN), University of Grenoble Alpes, 38000, Grenoble, France
| | - Sami Ben Hamida
- Douglas Hospital Research Center, Department of Psychiatry, McGill University, 6875 Boulevard LaSalle, Montreal, Quebec, H4H 1R3, Canada.
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19
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Smoker MP, Hernandez M, Zhang Y, Boehm SL. Assessment of Acute Motor Effects and Tolerance Following Self-Administration of Alcohol and Edible ∆ 9 -Tetrahydrocannabinol in Adolescent Male Mice. Alcohol Clin Exp Res 2019; 43:2446-2457. [PMID: 31524960 DOI: 10.1111/acer.14197] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 09/10/2019] [Indexed: 11/30/2022]
Abstract
BACKGROUND Cannabinoids and their principle psychoactive target, the cannabinoid type 1 receptor (CB1R), impact a number of alcohol-related properties, and although alcohol and cannabis are often co-used, particularly in adolescence, few animal models of this phenomenon exist. We modeled the co-use of alcohol and ∆9 -tetrahydrocannabinol (THC) in adolescent mice using ingestive methods popular during this developmental period in humans, namely binge-drinking and edible THC. With this model, we assessed levels of use, acute effects, and tolerance to each substance. METHODS Adolescent male C57BL/6J mice had daily, limited access to 1 of 2 edible doughs (THC or control), to 1 of 2 fluids (ethanol (EtOH) or water), and in 1 of 2 orders (dough-fluid or fluid-dough). Home cage locomotor activity was recorded both during access and after access. On the day following the final access session, a subset of mice were assessed for functional and metabolic tolerance to alcohol using accelerating rotarod and blood EtOH concentrations, respectively. The remaining mice were assessed for tolerance to THC-induced hypothermia, and whole-brain CB1R expression was assessed in all mice. RESULTS EtOH intake was on par with levels previously reported in adolescent mice. Edible THC was well-consumed, but consumption decreased at the highest dose provided. Locomotor activity increased following EtOH intake and decreased following edible THC consumption, and edible THC increased fluid intake in general. The use of alcohol produced neither functional nor metabolic tolerance to an alcohol challenge. However, the use of edible THC impaired subsequent drug-free rotarod performance and was associated with a reduction in THC's hypothermic effect. CONCLUSIONS Adolescent mice self-administered both alcohol and edible THC to a degree sufficient to acutely impact locomotor activity. However, only edible THC consumption had lasting effects during short-term abstinence. Thus, this adolescent co-use model could be used to explore sex differences in self-administration and the impact substance co-use might have on other domains such as mood and cognition.
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Affiliation(s)
- Michael P Smoker
- From the, Department of Psychology, Indiana Alcohol Research Center, Indiana University - Purdue University Indianapolis, Indianapolis, Indiana
| | - Maribel Hernandez
- From the, Department of Psychology, Indiana Alcohol Research Center, Indiana University - Purdue University Indianapolis, Indianapolis, Indiana
| | - Yanping Zhang
- From the, Department of Psychology, Indiana Alcohol Research Center, Indiana University - Purdue University Indianapolis, Indianapolis, Indiana
| | - Stephen L Boehm
- From the, Department of Psychology, Indiana Alcohol Research Center, Indiana University - Purdue University Indianapolis, Indianapolis, Indiana
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20
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Shahveisi K, Khazaie H, Farnia V, Khodamoradi M. REM sleep deprivation impairs retrieval, but not reconsolidation, of methamphetamine reward memory in male rats. Pharmacol Biochem Behav 2019; 185:172759. [PMID: 31415776 DOI: 10.1016/j.pbb.2019.172759] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 08/09/2019] [Accepted: 08/10/2019] [Indexed: 01/06/2023]
Abstract
Susceptibility to interference can be a result of memory retrieval and reconsolidation. Given the fact that addiction develops through the neural mechanisms of learning and memory, it would not be surprising that a consolidated drug reward memory may also be susceptible to interference following retrieval/reconsolidation. Due to the critical role of sleep in memory consolidation, sleep deprivation (SD) has been shown to impair memory. Therefore, the major objective of this study was to investigate the effect of rapid eye movement (REM) sleep deprivation (RSD) on the retrieval and reconsolidation of methamphetamine (METH) reward memory in male rats. The animals were trained to acquire METH-induced CPP (2 mg/kg, i.p.). METH reward memory was then reactivated/retrieved in the drug-paired chamber during a drug-free (memory reactivation) session. A period of 48-h RSD paradigm using the multiple platform technique resulted in persistent deficits in the retrieval of METH reward memory. Nevertheless, the same protocol of RSD, which was conducted immediately after the memory reactivation, did not affect the reconsolidation of METH reward memory. Additionally, the RSD episode induced a temporary potentiation of METH-induced hyperlocomotion. Our findings would seem to suggest that sleep is involved in the retrieval, but not reconsolidation, of METH reward memory. The results may also demonstrate that RSD mimics the effects of METH on locomotor activity. The results of this study, therefore, support the idea that sleep is involved in the processing of METH reward memory which can be considered for further investigations to manage the relapse associated with drug-related memory.
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Affiliation(s)
- Kaveh Shahveisi
- Sleep Disorders Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Habibolah Khazaie
- Sleep Disorders Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Vahid Farnia
- Substance Abuse Prevention Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mehdi Khodamoradi
- Substance Abuse Prevention Research Center, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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21
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Basavarajappa BS, Joshi V, Shivakumar M, Subbanna S. Distinct functions of endogenous cannabinoid system in alcohol abuse disorders. Br J Pharmacol 2019; 176:3085-3109. [PMID: 31265740 DOI: 10.1111/bph.14780] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 06/11/2019] [Accepted: 06/18/2019] [Indexed: 12/20/2022] Open
Abstract
Δ9 -tetrahydrocannabinol, the principal active component in Cannabis sativa extracts such as marijuana, participates in cell signalling by binding to cannabinoid CB1 and CB2 receptors on the cell surface. The CB1 receptors are present in both inhibitory and excitatory presynaptic terminals and the CB2 receptors are found in neuronal subpopulations in addition to microglial cells and astrocytes and are present in both presynaptic and postsynaptic terminals. Subsequent to the discovery of the endocannabinoid (eCB) system, studies have suggested that alcohol alters the eCB system and that this system plays a major role in the motivation to abuse alcohol. Preclinical studies have provided evidence that chronic alcohol consumption modulates eCBs and expression of CB1 receptors in brain addiction circuits. In addition, studies have further established the distinct function of the eCB system in the development of fetal alcohol spectrum disorders. This review provides a recent and comprehensive assessment of the literature related to the function of the eCB system in alcohol abuse disorders.
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Affiliation(s)
- Balapal S Basavarajappa
- Division of Analytical Psychopharmacology, Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, USA.,New York State Psychiatric Institute, New York, NY, USA.,Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York, NY, USA.,Department of Psychiatry, New York University Langone Medical Center, New York, NY, USA
| | - Vikram Joshi
- Division of Analytical Psychopharmacology, Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, USA
| | - Madhu Shivakumar
- Division of Analytical Psychopharmacology, Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, USA
| | - Shivakumar Subbanna
- Division of Analytical Psychopharmacology, Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, USA
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22
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Yazdani MA, Anwar MJ, Parveen B, Vohora D. Comparative Evaluation of A Partial Dopamine Agonist with A Preferential D2 and D3 Receptor Antagonist on Ethanol Induced Conditioned Place Preference in Mice. ACTA ACUST UNITED AC 2019. [DOI: 10.2174/2211556007666180705130103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
The role of dopamine receptor sub-families in the rewarding and reinforcing
effects of drugs of abuse has been established in numerous studies.
</P><P>
Objectives: In view of the extensive role of mesolimbic dopaminergic transmission in rewarding
and reinforcing effect of abused drugs including ethanol, the present study evaluated
three mechanistically different drugs viz a partial dopaminergic agonist (PDA, aripiprazole),
preferential D3 (mixed D2/D3) receptor antagonist (nafadotride), and a preferential D2 antagonist
(haloperidol), on ethanol-induced conditioned place preference (CPP) in mice.
</P><P>
Method: The study was carried out in Swiss strain albino mice. Ethanol (20%, 2g/kg) was
used to induce CPP in mice. After the acquisition of CPP, behavioral tests (elevated plus
maze and locomotor activity) were conducted and effect of drugs on expression and on reinstatement
(after extinction) was studied.
Results:
We found that aripiprazole (1 and 2 mg/kg but not 0.5mg/kg), haloperidol (0.2
mg/kg), and nafadotride (4.5 mg/kg) administered for 1 week during the conditioning phase
prevented acquisition, expression and reinstatement of ethanol-induced CPP. All the three
drugs reduced the ethanol-induced locomotor stimulation and produced antianxiety effects in
elevated plus maze following the acquisition of ethanol CPP.
Conclusion:
Partial dopaminergic agonism by aripiprazole was found to be a better strategy
for normalizing dopaminergic neurotransmission in alcoholics as seen in rodents.
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Affiliation(s)
- Muhammad Akmal Yazdani
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India
| | - Muhammad Jamir Anwar
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India
| | - Bushra Parveen
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India
| | - Divya Vohora
- Department of Pharmacology, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India
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23
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Chye Y, Christensen E, Solowij N, Yücel M. The Endocannabinoid System and Cannabidiol's Promise for the Treatment of Substance Use Disorder. Front Psychiatry 2019; 10:63. [PMID: 30837904 PMCID: PMC6390812 DOI: 10.3389/fpsyt.2019.00063] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 01/28/2019] [Indexed: 11/16/2022] Open
Abstract
Substance use disorder is characterized by repeated use of a substance, leading to clinically significant distress, making it a serious public health concern. The endocannabinoid system plays an important role in common neurobiological processes underlying substance use disorder, in particular by mediating the rewarding and motivational effects of substances and substance-related cues. In turn, a number of cannabinoid drugs (e.g., rimonabant, nabiximols) have been suggested for potential pharmacological treatment for substance dependence. Recently, cannabidiol (CBD), a non-psychoactive phytocannabinoid found in the cannabis plant, has also been proposed as a potentially effective treatment for the management of substance use disorder. Animal and human studies suggest that these cannabinoids have the potential to reduce craving and relapse in abstinent substance users, by impairing reconsolidation of drug-reward memory, salience of drug cues, and inhibiting the reward-facilitating effect of drugs. Such functions likely arise through the targeting of the endocannabinoid and serotonergic systems, although the exact mechanism is yet to be elucidated. This article seeks to review the role of the endocannabinoid system in substance use disorder and the proposed pharmacological action supporting cannabinoid drugs' therapeutic potential in addictions, with a focus on CBD. Subsequently, this article will evaluate the underlying evidence for CBD as a potential treatment for substance use disorder, across a range of substances including nicotine, alcohol, psychostimulants, opioids, and cannabis. While early research supports CBD's promise, further investigation and validation of CBD's efficacy, across preclinical and clinical trials will be necessary.
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Affiliation(s)
- Yann Chye
- Brain and Mental Health Research Hub, Monash Institute of Cognitive and Clinical Neurosciences, School of Psychological Sciences, Monash University, Melbourne, VIC, Australia
| | - Erynn Christensen
- Brain and Mental Health Research Hub, Monash Institute of Cognitive and Clinical Neurosciences, School of Psychological Sciences, Monash University, Melbourne, VIC, Australia
| | - Nadia Solowij
- School of Psychology and Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, NSW, Australia.,The Australian Centre for Cannabinoid Clinical and Research Excellence, New Lambton Heights, NSW, Australia
| | - Murat Yücel
- Brain and Mental Health Research Hub, Monash Institute of Cognitive and Clinical Neurosciences, School of Psychological Sciences, Monash University, Melbourne, VIC, Australia
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Endocannabinoid System and Alcohol Abuse Disorders. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1162:89-127. [PMID: 31332736 DOI: 10.1007/978-3-030-21737-2_6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Δ9-tetrahydrocannabinol (Δ9-THC), the primary active component in Cannabis sativa preparations such as hashish and marijuana, signals by binding to cell surface receptors. Two types of receptors have been cloned and characterized as cannabinoid (CB) receptors. CB1 receptors (CB1R) are ubiquitously present in the central nervous system (CNS) and are present in both inhibitory interneurons and excitatory neurons at the presynaptic terminal. CB2 receptors (CB2R) are demonstrated in microglial cells, astrocytes, and several neuron subpopulations and are present in both pre- and postsynaptic terminals. The majority of studies on these receptors have been conducted in the past two and half decades after the identification of the molecular constituents of the endocannabinoid (eCB) system that started with the characterization of CB1R. Subsequently, the seminal discovery was made, which suggested that alcohol (ethanol) alters the eCB system, thus establishing the contribution of the eCB system in the motivation to consume ethanol. Several preclinical studies have provided evidence that CB1R significantly contributes to the motivational and reinforcing properties of ethanol and that the chronic consumption of ethanol alters eCB transmitters and CB1R expression in the brain nuclei associated with addiction pathways. Additionally, recent seminal studies have further established the role of the eCB system in the development of ethanol-induced developmental disorders, such as fetal alcohol spectrum disorders (FASD). These results are augmented by in vitro and ex vivo studies, showing that acute and chronic treatment with ethanol produces physiologically relevant alterations in the function of the eCB system during development and in the adult stage. This chapter provides a current and comprehensive review of the literature concerning the role of the eCB system in alcohol abuse disorders (AUD).
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Navarrete F, García-Gutiérrez MS, Manzanares J. Pharmacological regulation of cannabinoid CB2 receptor modulates the reinforcing and motivational actions of ethanol. Biochem Pharmacol 2018; 157:227-234. [DOI: 10.1016/j.bcp.2018.07.041] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 07/27/2018] [Indexed: 11/27/2022]
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De Luca MA, Buczynski MW, Di Chiara G. Loren Parsons' contribution to addiction neurobiology. Addict Biol 2018; 23:1207-1222. [PMID: 29949237 DOI: 10.1111/adb.12642] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 05/17/2018] [Indexed: 11/29/2022]
Abstract
Loren (Larry) H. Parsons passed away at the age of 51. In spite of his premature departure, Larry much contributed to the drug abuse field. Since his graduate studies for the Ph.D. in Chemistry in J.B. Justice lab, microdialysis is the tread that links Larry's research topics, namely, the role of dopamine (DA), serotonin (5-HT), gamma-aminobutyric acid (GABA), glutamate and endocannabinoids (eCBs) in drug reinforcement and dependence. Larry was the first to show that abstinence from chronic cocaine reduces extracellular DA in the NAc, consistent with the so called 'dopamine depletion hypothesis' of cocaine addiction. Another Larry's major contributions are the studies on 5-HT and 5-HT receptors' role in cocaine stimulant actions, which resulted in the identification of 5-HT1B receptors as a critical substrate of cocaine reinforcement. By applying mass spectrometry to eCBs analysis in brain dialysates, Larry's lab showed that ethanol, heroin, nicotine and cocaine differentially affect anandamide and 2-arachidonoylglicerol overflow in the NAc shell, a critical site of drugs of abuse DA stimulant actions. Larry also applied microdialysis to study GABA and glutamate's role in ethanol dependence and heroin reinforcement, providing in vivo evidence for a sensitization of corticotropin-releasing factor-dependent release of GABA in the central amygdala in withdrawal from chronic ethanol and for a reduction of GABA transmission in the ventral pallidum in heroin but not cocaine intravenous self-administration. Larry showed the wide possibilities of microdialysis as a general purpose methodology for monitoring neurotransmitters and neuromodulators in the brain extracellular compartment. From this viewpoint, he stands as the best advocate for microdialysis.
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Affiliation(s)
- Maria A. De Luca
- Department of Biomedical Sciences, Section of Neuropsychopharmacology; University of Cagliari; Cagliari Italy
- National Institute of Neuroscience (INN); University of Cagliari; Cagliari Italy
| | - Matthew W. Buczynski
- School of Neuroscience; Virginia Polytechnic Institute and State University; Blacksburg VA 24061 USA
| | - Gaetano Di Chiara
- Department of Biomedical Sciences, Section of Neuropsychopharmacology; University of Cagliari; Cagliari Italy
- National Institute of Neuroscience (INN); University of Cagliari; Cagliari Italy
- National Research Council of Italy; Institute of Neuroscience; Cagliari Italy
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Role of the endocannabinoid system in drug addiction. Biochem Pharmacol 2018; 157:108-121. [PMID: 30217570 DOI: 10.1016/j.bcp.2018.09.013] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 09/10/2018] [Indexed: 12/20/2022]
Abstract
Drug addiction is a chronic relapsing disorder that produces a dramaticglobal health burden worldwide. Not effective treatment of drug addiction is currently available probably due to the difficulties to find an appropriate target to manage this complex disease raising the needs for further identification of novel therapeutic approaches. The endocannabinoid system has been found to play a crucial role in the neurobiological substrate underlying drug addiction. Endocannabinoids and cannabinoid receptors are widely expressed in the main areas of the mesocorticolimbic system that participate in the initiation and maintenance of drug consumption and in the development of compulsion and loss of behavioral control occurring during drug addiction. The identification of the important role played by CB1 cannabinoid receptors in drug addiction encouraged the possible used of an early commercialized CB1 receptor antagonist for treating drug addiction. However, the incidence of serious psychiatric adverse events leaded to the sudden withdrawal from the market of this CB1 antagonist and all the research programs developed by pharmaceutical companies to obtain new CB1 antagonists were stopped. Currently, new research strategies are under development to target the endocannabinoid system for drug addiction avoiding these side effects, which include allosteric negative modulators of CB1 receptors and compounds targeting CB2 receptors. Recent studies showing the potential role of CB2 receptors in the addictive properties of different drugs of abuse have open a promising research opportunity to develop novel possible therapeutic approaches.
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Zhou Y, Kreek MJ. Involvement of Activated Brain Stress Responsive Systems in Excessive and "Relapse" Alcohol Drinking in Rodent Models: Implications for Therapeutics. J Pharmacol Exp Ther 2018; 366:9-20. [PMID: 29669731 PMCID: PMC5988024 DOI: 10.1124/jpet.117.245621] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Accepted: 04/16/2018] [Indexed: 02/06/2023] Open
Abstract
Addictive diseases, including addiction to alcohol, pose massive public health costs. Addiction is a chronic relapsing disease caused by both the direct effects induced by drugs and persistent neuroadaptations at the molecular, cellular, and behavioral levels. These drug-type specific neuroadaptations are brought on largely by the reinforcing effects of drugs on the central nervous system and environmental stressors. Results from animal experiments have demonstrated important interactions between alcohol and stress-responsive systems. Addiction to specific drugs such as alcohol, psychostimulants, and opioids shares some common direct or downstream effects on the brain's stress-responsive systems, including arginine vasopressin and its V1b receptors, dynorphin and the κ-opioid receptors, pro-opiomelanocortin/β-endorphin and the μ-opioid receptors, and the endocannabinoids. Further study of these systems through laboratory-based and translational research could lead to the discovery of novel treatment targets and the early optimization of interventions (for example, combination) for the pharmacologic therapy of alcoholism.
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Affiliation(s)
- Yan Zhou
- Laboratory of Biology of Addictive Diseases, Rockefeller University, New York, New York
| | - Mary Jeanne Kreek
- Laboratory of Biology of Addictive Diseases, Rockefeller University, New York, New York
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Frontera JL, Gonzalez Pini VM, Messore FL, Brusco A. Exposure to cannabinoid agonist WIN 55,212-2 during early adolescence increases alcohol preference and anxiety in CD1 mice. Neuropharmacology 2018; 137:268-274. [PMID: 29778010 DOI: 10.1016/j.neuropharm.2018.05.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Revised: 05/10/2018] [Accepted: 05/11/2018] [Indexed: 01/31/2023]
Abstract
The endocannabinoid (eCB) system is involved in the modulation of the reward system and participates in the reinforcing effects of different drugs of abuse, including alcohol. The most abundant receptor of the eCB system in the central nervous system is the CB1 receptor (CB1R), which is predominantly expressed in areas involved in drug addiction, such as the nucleus accumbens, the ventral tegmental area, the substantia nigra and the raphe nucleus. CB1R is expressed in early stages during development, and reaches maximum levels during early adolescence. In addition, cannabinoid receptor 2 has been found expressed also in the central nervous system at postsynaptic level. In order to analyze the participation of the eCB system on ethanol (EtOH) preference, mice were exposed to cannabinoid agonist WIN 55,212-2 (WIN) for 5 consecutive days during early adolescence. Anxiety tests were performed the day after WIN treatment withdrawal, and EtOH preference was measured throughout adolescence. Mice exposed to WIN during early adolescence exhibited a significant increase in EtOH intake and preference after treatment. Moreover, WIN exposure during early adolescence induced an anxiogenic effect. Morphometric analysis revealed higher dendritic ramifications and fewer dendritic spines in neurons of the substantia nigra pars compacta in WIN-treated mice. On the other hand, immunohistochemical analysis revealed an increase in the number of tryptophan hydroxylase-expressing neurons in the dorsal raphe nucleus but no differences were found in the ventral tegmental area or substantia nigra pars compacta for tyrosine hydroxylase-expressing neurons. These results demonstrate that exposure to WIN in early adolescence can affect neural development and induce alcohol preference and anxiety-like behavior during late adolescence.
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Affiliation(s)
- Jimena Laura Frontera
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Fisiología, Biología Molecular y Celular, Bs As, Argentina; CONICET- Universidad de Buenos Aires, Instituto de Biología Celular y Neurociencia (IBCN), Bs As, Argentina.
| | | | - Fernando Luis Messore
- CONICET- Universidad de Buenos Aires, Instituto de Biología Celular y Neurociencia (IBCN), Bs As, Argentina; Universidad de Buenos Aires, Facultad de Medicina, Departamento de Fisiología, Bs As, Argentina
| | - Alicia Brusco
- CONICET- Universidad de Buenos Aires, Instituto de Biología Celular y Neurociencia (IBCN), Bs As, Argentina; Universidad de Buenos Aires, Facultad de Medicina, Departamento de Biología Celular, Histología, Embriología y Genética, Bs As, Argentina
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Portero-Tresserra M, Gracia-Rubio I, Cantacorps L, Pozo OJ, Gómez-Gómez A, Pastor A, López-Arnau R, de la Torre R, Valverde O. Maternal separation increases alcohol-drinking behaviour and reduces endocannabinoid levels in the mouse striatum and prefrontal cortex. Eur Neuropsychopharmacol 2018; 28:499-512. [PMID: 29478745 DOI: 10.1016/j.euroneuro.2018.02.003] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 12/04/2017] [Accepted: 02/07/2018] [Indexed: 12/18/2022]
Abstract
Childhood adversity is associated with an increased risk of mood, anxiety and substance use disorders. Maternal separation is a reliable rodent model of early life adversity that leads to depression-like symptoms, which may increase the vulnerability to alcohol consumption during adolescence. However, the specific alterations in the pattern of alcohol consumption induced by maternal separation and the underlying molecular mechanisms are still unclear. The purpose of this study is to evaluate the long-term effects of maternal separation with early weaning (MSEW) on emotional and social behaviour, alcohol rewarding properties, and alcohol consumption, abstinence and relapse in adolescent male C57BL/6 mice. In addition, endocannabinoid and monoamine levels were analysed in discrete brain areas. Results showed that MSEW mice presented emotional alterations related to depressive-like behaviour and modified endocannabinoid levels in the striatum and the prefrontal cortex. MSEW mice also showed impairments in alcohol-induced conditioned place preference and higher alcohol intake in a model of binge drinking. Moreover, MSEW animals displayed a higher propensity to relapse in the two-bottle choice paradigm following a period of alcohol abstinence associated with reduced monoamine levels in the striatum. Such results indicate that exposure to early life stress increased the vulnerability to alcohol binge-drinking during adolescence, which may be partially explained by decreased sensitivity to alcohol rewarding properties and the ability to potentiate alcohol intake following a period of abstinence.
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Affiliation(s)
- Marta Portero-Tresserra
- Neurobiology of Behaviour Research Group (GReNeC-NeuroBio), Universitat Pompeu Fabra, Barcelona, Spain
| | - Irene Gracia-Rubio
- Neurobiology of Behaviour Research Group (GReNeC-NeuroBio), Universitat Pompeu Fabra, Barcelona, Spain
| | - Lídia Cantacorps
- Neurobiology of Behaviour Research Group (GReNeC-NeuroBio), Universitat Pompeu Fabra, Barcelona, Spain
| | - Oscar J Pozo
- IMIM-Hospital del Mar Medical Research Institute. Integrative Pharmacology and Systems Neuroscience Research Group, Barcelona, Spain
| | - Alejandro Gómez-Gómez
- IMIM-Hospital del Mar Medical Research Institute. Integrative Pharmacology and Systems Neuroscience Research Group, Barcelona, Spain
| | - Antoni Pastor
- IMIM-Hospital del Mar Medical Research Institute. Integrative Pharmacology and Systems Neuroscience Research Group, Barcelona, Spain
| | - Raúl López-Arnau
- Department of Pharmacology, Toxicology and Medicinal Chemistry, University of Barcelona, Barcelona, Spain
| | - Rafael de la Torre
- IMIM-Hospital del Mar Medical Research Institute. Integrative Pharmacology and Systems Neuroscience Research Group, Barcelona, Spain
| | - Olga Valverde
- Neurobiology of Behaviour Research Group (GReNeC-NeuroBio), Universitat Pompeu Fabra, Barcelona, Spain; Neuroscience Research Program, IMIM-Hospital del Mar Medical Research Institute, Barcelona, Spain.
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The cannabinoid-1 receptor is abundantly expressed in striatal striosomes and striosome-dendron bouquets of the substantia nigra. PLoS One 2018; 13:e0191436. [PMID: 29466446 PMCID: PMC5821318 DOI: 10.1371/journal.pone.0191436] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 01/04/2018] [Indexed: 12/20/2022] Open
Abstract
Presynaptic cannabinoid-1 receptors (CB1-R) bind endogenous and exogenous cannabinoids to modulate neurotransmitter release. CB1-Rs are expressed throughout the basal ganglia, including striatum and substantia nigra, where they play a role in learning and control of motivated actions. However, the pattern of CB1-R expression across different striatal compartments, microcircuits and efferent targets, and the contribution of different CB1-R-expressing neurons to this pattern, are unclear. We use a combination of conventional techniques and novel genetic models to evaluate CB1-R expression in striosome (patch) and matrix compartments of the striatum, and in nigral targets of striatal medium spiny projection neurons (MSNs). CB1-R protein and mRNA follow a descending dorsolateral-to-ventromedial intensity gradient in the caudal striatum, with elevated expression in striosomes relative to the surrounding matrix. The lateral predominance of striosome CB1-Rs contrasts with that of the classical striosomal marker, the mu opioid receptor (MOR), which is expressed most prominently in rostromedial striosomes. The dorsolateral-to-ventromedial CB1-R gradient is similar to Drd2 dopamine receptor immunoreactivity and opposite to Substance P. This topology of CB1-R expression is maintained downstream in the globus pallidus and substantia nigra. Dense CB1-R-expressing striatonigral fibers extend dorsally within the substantia nigra pars reticulata, and colocalize with bundles of ventrally extending, striosome-targeted, dendrites of dopamine-containing neurons in the substantia nigra pars compacta (striosome-dendron bouquets). Within striatum, CB1-Rs colocalize with fluorescently labeled MSN collaterals within the striosomes. Cre recombinase-mediated deletion of CB1-Rs from cortical projection neurons or MSNs, and MSN-selective reintroduction of CB1-Rs in knockout mice, demonstrate that the principal source of CB1-Rs in dorsolateral striosomes is local MSN collaterals. These data suggest a role for CB1-Rs in caudal dorsolateral striosome collaterals and striosome-dendron bouquet projections to lateral substantia nigra, where they are anatomically poised to mediate presynaptic disinhibition of both striosomal MSNs and midbrain dopamine neurons in response to endocannabinoids and cannabinomimetics.
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Tournier BB, Dimiziani A, Tsartsalis S, Millet P, Ginovart N. Different effects of chronic THC on the neuroadaptive response of dopamine D2/3 receptor-mediated signaling in roman high- and roman low-avoidance rats. Synapse 2018; 72. [DOI: 10.1002/syn.22023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 12/01/2017] [Accepted: 12/18/2017] [Indexed: 12/16/2022]
Affiliation(s)
- Benjamin B. Tournier
- Department of Mental Health and Psychiatry, Laboratory for Translational Imaging in Psychiatric Neuroscience; University Hospitals of Geneva; Geneva Switzerland
| | - Andrea Dimiziani
- Department of Mental Health and Psychiatry, Laboratory for Translational Imaging in Psychiatric Neuroscience; University Hospitals of Geneva; Geneva Switzerland
- Department of Psychiatry; University of Geneva; Geneva Switzerland
| | - Stergios Tsartsalis
- Department of Mental Health and Psychiatry, Laboratory for Translational Imaging in Psychiatric Neuroscience; University Hospitals of Geneva; Geneva Switzerland
- Department of Psychiatry; University of Geneva; Geneva Switzerland
| | - Philippe Millet
- Department of Mental Health and Psychiatry, Laboratory for Translational Imaging in Psychiatric Neuroscience; University Hospitals of Geneva; Geneva Switzerland
- Department of Psychiatry; University of Geneva; Geneva Switzerland
| | - Nathalie Ginovart
- Department of Mental Health and Psychiatry, Laboratory for Translational Imaging in Psychiatric Neuroscience; University Hospitals of Geneva; Geneva Switzerland
- Department of Psychiatry; University of Geneva; Geneva Switzerland
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Delis F, Rosko L, Shroff A, Leonard KE, Thanos PK. Oral haloperidol or olanzapine intake produces distinct and region-specific increase in cannabinoid receptor levels that is prevented by high fat diet. Prog Neuropsychopharmacol Biol Psychiatry 2017; 79:268-280. [PMID: 28619471 DOI: 10.1016/j.pnpbp.2017.06.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 06/02/2017] [Accepted: 06/12/2017] [Indexed: 10/19/2022]
Abstract
Clinical studies show higher levels of cannabinoid CB1 receptors (CB1R) in the brain of schizophrenic patients while preclinical studies report a significant functional interaction between dopamine D2 receptors and CB1Rs as well as an upregulation of CB1Rs after antipsychotic treatment. These findings prompted us to study the effects of chronic oral intake of a first and a second generation antipsychotic, haloperidol and olanzapine, on the levels and distribution of CB1Rs in the rat brain. Rats consumed either regular chow or high-fat food and drank water, haloperidol drinking solution (1.5mg/kg), or olanzapine drinking solution (10mg/kg) for four weeks. Motor and cognitive functions were tested at the end of treatment week 3 and upon drug discontinuation. Two days after drug discontinuation, rats were euthanized and brains were processed for in vitro receptor autoradiography. In chow-fed animals, haloperidol and olanzapine increased CB1R levels in the basal ganglia and the hippocampus, in a similar, but not identical pattern. In addition, olanzapine had unique effects in CB1R upregulation in higher order cognitive areas, in the secondary somatosensory cortex, in the visual and auditory cortices and the geniculate nuclei, as well as in the hypothalamus. High fat food consumption prevented antipsychotic-induced increase in CB1R levels in all regions examined, with one exception, the globus pallidus, in which they were higher in haloperidol-treated rats. The results point towards the hypothesis that increased CB1R levels could be a confounding effect of antipsychotic medication in schizophrenia that is circumveneted by high fat feeding.
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Affiliation(s)
- Foteini Delis
- Department of Pharmacology, Medical School, University of Ioannina, 45110, Ioannina, Greece
| | - Lauren Rosko
- Georgetown University Medical Center, Georgetown University, Washington, DC, 20007, USA
| | - Aditya Shroff
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Research Institute on Addictions, University at Buffalo, Buffalo, NY, 14203, USA
| | - Kenneth E Leonard
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Research Institute on Addictions, University at Buffalo, Buffalo, NY, 14203, USA
| | - Panayotis K Thanos
- Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Research Institute on Addictions, University at Buffalo, Buffalo, NY, 14203, USA.
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Silva AAF, Barbosa-Souza E, Confessor-Carvalho C, Silva RRR, De Brito ACL, Cata-Preta EG, Silva Oliveira T, Berro LF, Oliveira-Lima AJ, Marinho EAV. Context-dependent effects of rimonabant on ethanol-induced conditioned place preference in female mice. Drug Alcohol Depend 2017; 179:317-324. [PMID: 28837947 DOI: 10.1016/j.drugalcdep.2017.07.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 07/12/2017] [Accepted: 07/20/2017] [Indexed: 11/27/2022]
Abstract
BACKGROUND The CB1 receptor antagonist rimonabant has been previously found to prevent behavioral effects of drugs of abuse in a context-dependent manner, suggesting an important role of endocannabinoid signaling in drug-induced environmental conditioning. The aim of the present study was to evaluate the effects of rimonabant on ethanol-induced conditioned place preference (CPP) in female mice. METHODS Animals were conditioned with saline or ethanol (1.8g/kg) during 8 sessions, and subsequently treated with either saline or rimonabant (1 or 10mg/kg) in the CPP environment previously associated with saline (unpaired) or ethanol (paired) for 6 consecutive days. Animals were then challenged with ethanol (1.8g/kg) in the ethanol-paired environment and ethanol-induced CPP was quantified on the following day. RESULTS While treatment with 1mg/kg rimonabant in the saline-associated environment had no effects on the subsequent expression of ethanol-induced CPP, it blocked the expression of CPP to ethanol when paired to the ethanol-associated environment. When given in the ethanol-paired environment, 10mg/kg rimonabant induced aversion to the ethanol-associated environment. The same aversion effect was observed for 10mg/kg rimonabant when given in the saline-associated environment, thereby potentiating the expression of ethanol-induced CPP. Importantly, rimonabant did not induce CPP or conditioned place aversion on its own. Controlling for the estrous cycle phase showed no influences of hormonal cycle on the development and expression of ethanol-induced CPP. CONCLUSIONS Our data suggest that rimonabant reduces the rewarding properties of ethanol by abolishing drug-environment conditioning in the CPP paradigm in a context-dependent manner.
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Affiliation(s)
- Aline A F Silva
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, 45662-0, Ilhéus, BA, Brazil
| | - Evelyn Barbosa-Souza
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, 45662-0, Ilhéus, BA, Brazil
| | - Cassio Confessor-Carvalho
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, 45662-0, Ilhéus, BA, Brazil
| | - Raiany R R Silva
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, 45662-0, Ilhéus, BA, Brazil
| | - Ana Carolina L De Brito
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, 45662-0, Ilhéus, BA, Brazil
| | - Elisangela G Cata-Preta
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, 45662-0, Ilhéus, BA, Brazil
| | - Thaynara Silva Oliveira
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, 45662-0, Ilhéus, BA, Brazil
| | - Lais F Berro
- Department of Psychiatry and Human Behavior, University of Mississippi Medical Center, 2500 N State St, Jackson, MS, 39216, USA.
| | - Alexandre J Oliveira-Lima
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, 45662-0, Ilhéus, BA, Brazil
| | - Eduardo A V Marinho
- Department of Health Sciences, Universidade Estadual de Santa Cruz, Rod. Ilhéus/Itabuna, Km 16, 45662-0, Ilhéus, BA, Brazil.
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Blockade of alcohol escalation and "relapse" drinking by pharmacological FAAH inhibition in male and female C57BL/6J mice. Psychopharmacology (Berl) 2017; 234:2955-2970. [PMID: 28730283 PMCID: PMC5693682 DOI: 10.1007/s00213-017-4691-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 07/03/2017] [Indexed: 01/09/2023]
Abstract
BACKGROUND Anandamide (AEA)-dependent signaling is regulated by the catabolic enzyme fatty acid amide hydrolase (FAAH). Several lines of evidence have demonstrated that FAAH and AEA are involved in the behavioral effects of alcohol. Therefore, we investigated whether a selective FAAH inhibitor, URB597 (cyclohexylcarbamic acid 3'-[aminocarbonyl]-[1,1'-biphenyl]-3-yl ester), altered alcohol intake in mice in a voluntary alcohol drinking model. METHODS Mice, subjected to 3 weeks of chronic intermittent access (IA) in a two-bottle choice paradigm with 24-h access every other day, developed rapid escalation of alcohol intake and high preference. We evaluated the pharmacological effects of URB597 after both acute (1-day) withdrawal from chronic IA and 1-week withdrawal using the alcohol deprivation effect (ADE) model. AEA and N-acyl ethanolamide (NAE) abundances were determined after chronic IA, acute (1-day), or long-term (1 and 2 weeks) withdrawal in four brain regions. RESULTS Acute pretreatment with URB597 reduced alcohol intake and preference after acute withdrawal. This effect was blocked by pretreatment with a selective type 1 cannabinoid receptor (CB1) antagonist, suggesting a CB1-mediated mechanism. Both single- and multiple-dosing regimens with an effective dose of URB597 prevented the ADE, with no tolerance development after the multi-dosing regimen. AEA and NAE levels were transiently increased in all brain regions measured after acute withdrawal, indicating that the endocannabinoid system is involved in acute alcohol withdrawal stress response. CONCLUSION FAAH inhibitors reduce alcohol escalation and "relapse" drinking in mice.
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Marcus DJ, Henderson-Redmond AN, Gonek M, Zee ML, Farnsworth JC, Amin RA, Andrews MJ, Davis BJ, Mackie K, Morgan DJ. Mice expressing a "hyper-sensitive" form of the CB1 cannabinoid receptor (CB1) show modestly enhanced alcohol preference and consumption. PLoS One 2017; 12:e0174826. [PMID: 28426670 PMCID: PMC5398885 DOI: 10.1371/journal.pone.0174826] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 03/15/2017] [Indexed: 11/17/2022] Open
Abstract
We recently characterized S426A/S430A mutant mice expressing a desensitization-resistant form of the CB1 receptor. These mice display an enhanced response to endocannabinoids and ∆9-THC. In this study, S426A/S430A mutants were used as a novel model to test whether ethanol consumption, morphine dependence, and reward for these drugs are potentiated in mice with a "hyper-sensitive" form of CB1. Using an unlimited-access, two-bottle choice, voluntary drinking paradigm, S426A/S430A mutants exhibit modestly increased intake and preference for low (6%) but not higher concentrations of ethanol. S426A/S430A mutants and wild-type mice show similar taste preference for sucrose and quinine, exhibit normal sensitivity to the hypothermic and ataxic effects of ethanol, and have normal blood ethanol concentrations following administration of ethanol. S426A/S430A mutants develop robust conditioned place preference for ethanol (2 g/kg), morphine (10 mg/kg), and cocaine (10 mg/kg), demonstrating that drug reward is not changed in S426A/S430A mutants. Precipitated morphine withdrawal is also unchanged in opioid-dependent S426A/S430A mutant mice. Although ethanol consumption is modestly changed by enhanced CB1 signaling, reward, tolerance, and acute sensitivity to ethanol and morphine are normal in this model.
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Affiliation(s)
- David J. Marcus
- Department of Psychological and Brain Sciences and The Linda and Jack Gill Center for Biomolecular Science, Indiana University, Bloomington, IN, United States of America
- Department of Anesthesiology, Penn State University College of Medicine, Hershey, PA, United States of America
| | - Angela N. Henderson-Redmond
- Department of Anesthesiology, Penn State University College of Medicine, Hershey, PA, United States of America
| | - Maciej Gonek
- Department of Psychological and Brain Sciences and The Linda and Jack Gill Center for Biomolecular Science, Indiana University, Bloomington, IN, United States of America
| | - Michael L. Zee
- Department of Psychological and Brain Sciences and The Linda and Jack Gill Center for Biomolecular Science, Indiana University, Bloomington, IN, United States of America
- Department of Anesthesiology, Penn State University College of Medicine, Hershey, PA, United States of America
| | - Jill C. Farnsworth
- Department of Psychological and Brain Sciences and The Linda and Jack Gill Center for Biomolecular Science, Indiana University, Bloomington, IN, United States of America
| | - Randa A. Amin
- Department of Psychological and Brain Sciences and The Linda and Jack Gill Center for Biomolecular Science, Indiana University, Bloomington, IN, United States of America
| | - Mary-Jeanette Andrews
- Department of Psychological and Brain Sciences and The Linda and Jack Gill Center for Biomolecular Science, Indiana University, Bloomington, IN, United States of America
| | - Brian J. Davis
- Department of Psychological and Brain Sciences and The Linda and Jack Gill Center for Biomolecular Science, Indiana University, Bloomington, IN, United States of America
| | - Ken Mackie
- Department of Psychological and Brain Sciences and The Linda and Jack Gill Center for Biomolecular Science, Indiana University, Bloomington, IN, United States of America
| | - Daniel J. Morgan
- Department of Psychological and Brain Sciences and The Linda and Jack Gill Center for Biomolecular Science, Indiana University, Bloomington, IN, United States of America
- Department of Anesthesiology, Penn State University College of Medicine, Hershey, PA, United States of America
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Johnson KA, Lovinger DM. Presynaptic G Protein-Coupled Receptors: Gatekeepers of Addiction? Front Cell Neurosci 2016; 10:264. [PMID: 27891077 PMCID: PMC5104741 DOI: 10.3389/fncel.2016.00264] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 10/31/2016] [Indexed: 12/21/2022] Open
Abstract
Drug abuse and addiction cause widespread social and public health problems, and the neurobiology underlying drug actions and drug use and abuse is an area of intensive research. Drugs of abuse alter synaptic transmission, and these actions contribute to acute intoxication as well as the chronic effects of abused substances. Transmission at most mammalian synapses involves neurotransmitter activation of two receptor subtypes, ligand-gated ion channels that mediate fast synaptic responses and G protein-coupled receptors (GPCRs) that have slower neuromodulatory actions. The GPCRs represent a large proportion of neurotransmitter receptors involved in almost all facets of nervous system function. In addition, these receptors are targets for many pharmacotherapeutic agents. Drugs of abuse directly or indirectly affect neuromodulation mediated by GPCRs, with important consequences for intoxication, drug taking and responses to prolonged drug exposure, withdrawal and addiction. Among the GPCRs are several subtypes involved in presynaptic inhibition, most of which are coupled to the Gi/o class of G protein. There is increasing evidence that these presynaptic Gi/o-coupled GPCRs have important roles in the actions of drugs of abuse, as well as behaviors related to these drugs. This topic will be reviewed, with particular emphasis on receptors for three neurotransmitters, Dopamine (DA; D1- and D2-like receptors), Endocannabinoids (eCBs; CB1 receptors) and glutamate (group II metabotropic glutamate (mGlu) receptors). The focus is on recent evidence from laboratory animal models (and some evidence in humans) implicating these receptors in the acute and chronic effects of numerous abused drugs, as well as in the control of drug seeking and taking. The ability of drugs targeting these receptors to modify drug seeking behavior has raised the possibility of using compounds targeting these receptors for addiction pharmacotherapy. This topic is also discussed, with emphasis on development of mGlu2 positive allosteric modulators (PAMs).
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Affiliation(s)
- Kari A. Johnson
- Section on Synaptic Pharmacology, Laboratory for Integrative Neuroscience, National Institute on Alcohol Abuse and Alcoholism, National Institutes of HealthBethesda, MD, USA
| | - David M. Lovinger
- Section on Synaptic Pharmacology, Laboratory for Integrative Neuroscience, National Institute on Alcohol Abuse and Alcoholism, National Institutes of HealthBethesda, MD, USA
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Delis F, Polissidis A, Poulia N, Justinova Z, Nomikos GG, Goldberg SR, Antoniou K. Attenuation of Cocaine-Induced Conditioned Place Preference and Motor Activity via Cannabinoid CB2 Receptor Agonism and CB1 Receptor Antagonism in Rats. Int J Neuropsychopharmacol 2016; 20:269-278. [PMID: 27994006 PMCID: PMC5408977 DOI: 10.1093/ijnp/pyw102] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 11/07/2016] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Studies have shown the involvement of cannabinoid (CB) receptors in the behavioral and neurobiological effects of psychostimulants. Most of these studies have focused on the role of CB1 receptors in the psychostimulant effects of cocaine, while very few have investigated the respective role of CB2 receptors. Further studies are warranted to elucidate the extent of CB receptor involvement in the expression of cocaine-induced effects. METHODS The role of CB1 and CB2 receptors in the rewarding and motor properties of cocaine was assessed in conditioned place preference, conditioned motor activity, and open field activity in rats. RESULTS The CB1 receptor antagonist rimonabant (3 mg/kg) decreased the acquisition and the expression of conditioned place preference induced by cocaine (20 mg/kg). Rimonabant inhibited cocaine-elicited conditioned motor activity when administered during the expression of cocaine-induced conditioned place preference. Rimonabant decreased ambulatory and vertical activity induced by cocaine. The CB2 receptor agonist JWH-133 (10 mg/kg) decreased the acquisition and the expression of cocaine-induced conditioned place preference. JWH-133 inhibited cocaine-elicited conditioned motor activity when administered during the acquisition and the expression of cocaine-induced conditioned place preference. JWH-133 decreased ambulatory activity and abolished vertical activity induced by cocaine. The effects of JWH-133 on cocaine conditioned and stimulated responses were abolished when the CB2 receptor antagonist/inverse agonist AM630 (5 mg/kg) was preadministered. CONCLUSIONS Cannabinoid CB1 and CB2 receptors modulate cocaine-induced rewarding behavior and appear to have opposite roles in the regulation of cocaine's reinforcing and psychomotor effects.
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Affiliation(s)
- Foteini Delis
- Department of Pharmacology, Faculty of Medicine, School of Health Sciences, University of Ioannina, Ioannina, Greece (Dr Delis, Dr Polissidis, Ms Poulia, and Dr Anoniou)
| | - Alexia Polissidis
- Department of Pharmacology, Faculty of Medicine, School of Health Sciences, University of Ioannina, Ioannina, Greece (Dr Delis, Dr Polissidis, Ms Poulia, and Dr Anoniou);,Laboratory of Neurodegenerative Diseases, Center for Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation Academy of Athens, Athens, Greece (Dr Polissidis)
| | - Nafsika Poulia
- Department of Pharmacology, Faculty of Medicine, School of Health Sciences, University of Ioannina, Ioannina, Greece (Dr Delis, Dr Polissidis, Ms Poulia, and Dr Anoniou)
| | - Zuzana Justinova
- Preclinical Pharmacology Section, Behavioral Neuroscience Research Branch, Intramural Research Program, National Institute on Drug Abuse, NIH, DHHS, Baltimore, MD (Drs Justinova and Goldberg)
| | - George G. Nomikos
- Global Clinical Science, Takeda Development Center Americas, Inc, Deerfield, IL (Dr Nomikos)
| | - Steven R. Goldberg
- Preclinical Pharmacology Section, Behavioral Neuroscience Research Branch, Intramural Research Program, National Institute on Drug Abuse, NIH, DHHS, Baltimore, MD (Drs Justinova and Goldberg)
| | - Katerina Antoniou
- Department of Pharmacology, Faculty of Medicine, School of Health Sciences, University of Ioannina, Ioannina, Greece (Dr Delis, Dr Polissidis, Ms Poulia, and Dr Anoniou)
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Tournier BB, Tsartsalis S, Dimiziani A, Millet P, Ginovart N. Time-dependent effects of repeated THC treatment on dopamine D2/3 receptor-mediated signalling in midbrain and striatum. Behav Brain Res 2016; 311:322-329. [DOI: 10.1016/j.bbr.2016.05.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 05/17/2016] [Accepted: 05/21/2016] [Indexed: 02/07/2023]
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Martín-García E, Bourgoin L, Cathala A, Kasanetz F, Mondesir M, Gutiérrez-Rodriguez A, Reguero L, Fiancette JF, Grandes P, Spampinato U, Maldonado R, Piazza PV, Marsicano G, Deroche-Gamonet V. Differential Control of Cocaine Self-Administration by GABAergic and Glutamatergic CB1 Cannabinoid Receptors. Neuropsychopharmacology 2016; 41:2192-205. [PMID: 26612422 PMCID: PMC4946049 DOI: 10.1038/npp.2015.351] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 11/13/2015] [Accepted: 11/19/2015] [Indexed: 01/19/2023]
Abstract
The type 1 cannabinoid receptor (CB1) modulates numerous neurobehavioral processes and is therefore explored as a target for the treatment of several mental and neurological diseases. However, previous studies have investigated CB1 by targeting it globally, regardless of its two main neuronal localizations on glutamatergic and GABAergic neurons. In the context of cocaine addiction this lack of selectivity is critical since glutamatergic and GABAergic neuronal transmission is involved in different aspects of the disease. To determine whether CB1 exerts different control on cocaine seeking according to its two main neuronal localizations, we used mutant mice with deleted CB1 in cortical glutamatergic neurons (Glu-CB1) or in forebrain GABAergic neurons (GABA-CB1). In Glu-CB1, gene deletion concerns the dorsal telencephalon, including neocortex, paleocortex, archicortex, hippocampal formation and the cortical portions of the amygdala. In GABA-CB1, it concerns several cortical and non-cortical areas including the dorsal striatum, nucleus accumbens, thalamic, and hypothalamic nuclei. We tested complementary components of cocaine self-administration, separating the influence of primary and conditioned effects. Mechanisms underlying each phenotype were explored using in vivo microdialysis and ex vivo electrophysiology. We show that CB1 expression in forebrain GABAergic neurons controls mouse sensitivity to cocaine, while CB1 expression in cortical glutamatergic neurons controls associative learning processes. In accordance, in the nucleus accumbens, GABA-CB1 receptors control cocaine-induced dopamine release and Glu-CB1 receptors control AMPAR/NMDAR ratio; a marker of synaptic plasticity. Our findings demonstrate a critical distinction of the altered balance of Glu-CB1 and GABA-CB1 activity that could participate in the vulnerability to cocaine abuse and addiction. Moreover, these novel insights advance our understanding of CB1 neuropathophysiology.
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Affiliation(s)
- Elena Martín-García
- INSERM U862, Pathophysiology of Addiction, NeuroCentre Magendie, Bordeaux, France,University of Bordeaux, Bordeaux, France,Departament de Ciencies Experimentals i de la Salut, Universitat Pompeu Fabra, PRBB, Barcelona, Spain
| | - Lucie Bourgoin
- INSERM U862, Pathophysiology of Addiction, NeuroCentre Magendie, Bordeaux, France,University of Bordeaux, Bordeaux, France
| | - Adeline Cathala
- INSERM U862, Pathophysiology of Addiction, NeuroCentre Magendie, Bordeaux, France,University of Bordeaux, Bordeaux, France
| | - Fernando Kasanetz
- INSERM U862, Pathophysiology of Addiction, NeuroCentre Magendie, Bordeaux, France,University of Bordeaux, Bordeaux, France
| | - Miguel Mondesir
- INSERM U862, Pathophysiology of Addiction, NeuroCentre Magendie, Bordeaux, France,University of Bordeaux, Bordeaux, France
| | - Ana Gutiérrez-Rodriguez
- Department of Neurosciences, Faculty of Medicine and Dentistry, University of the Basque Country UPV/EHU, Leioa, Spain,Achucarro Basque Center for Neuroscience, Bizkaia Science and Technology Park, Zamudio, Spain
| | - Leire Reguero
- Department of Neurosciences, Faculty of Medicine and Dentistry, University of the Basque Country UPV/EHU, Leioa, Spain,Achucarro Basque Center for Neuroscience, Bizkaia Science and Technology Park, Zamudio, Spain
| | - Jean- François Fiancette
- INSERM U862, Pathophysiology of Addiction, NeuroCentre Magendie, Bordeaux, France,University of Bordeaux, Bordeaux, France
| | - Pedro Grandes
- Department of Neurosciences, Faculty of Medicine and Dentistry, University of the Basque Country UPV/EHU, Leioa, Spain,Achucarro Basque Center for Neuroscience, Bizkaia Science and Technology Park, Zamudio, Spain
| | - Umberto Spampinato
- INSERM U862, Pathophysiology of Addiction, NeuroCentre Magendie, Bordeaux, France,University of Bordeaux, Bordeaux, France
| | - Rafael Maldonado
- Departament de Ciencies Experimentals i de la Salut, Universitat Pompeu Fabra, PRBB, Barcelona, Spain
| | - Pier Vincenzo Piazza
- INSERM U862, Pathophysiology of Addiction, NeuroCentre Magendie, Bordeaux, France,University of Bordeaux, Bordeaux, France
| | - Giovanni Marsicano
- University of Bordeaux, Bordeaux, France,INSERM U862, Endocannabinoids and Neuroadaptation, NeuroCentre Magendie, Bordeaux, France
| | - Véronique Deroche-Gamonet
- INSERM U862, Pathophysiology of Addiction, NeuroCentre Magendie, Bordeaux, France,University of Bordeaux, Bordeaux, France,CRI U862, Pathophysiology of Addiction, Neurocentre Magendie, 146 rue Léo Saignat, Bordeaux 33077, France, Tel: +33 5 57 57 36 80, Fax: +33 5 57 57 36 69, E-mail:
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Tung LW, Lu GL, Lee YH, Yu L, Lee HJ, Leishman E, Bradshaw H, Hwang LL, Hung MS, Mackie K, Zimmer A, Chiou LC. Orexins contribute to restraint stress-induced cocaine relapse by endocannabinoid-mediated disinhibition of dopaminergic neurons. Nat Commun 2016; 7:12199. [PMID: 27448020 PMCID: PMC4961842 DOI: 10.1038/ncomms12199] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 06/10/2016] [Indexed: 12/31/2022] Open
Abstract
Orexins are associated with drug relapse in rodents. Here, we show that acute restraint stress in mice activates lateral hypothalamic (LH) orexin neurons, increases levels of orexin A and 2-arachidonoylglycerol (2-AG) in the ventral tegmental area (VTA), and reinstates extinguished cocaine-conditioned place preference (CPP). This stress-induced reinstatement of cocaine CPP depends on type 1 orexin receptors (OX1Rs), type 1 cannabinoid receptors (CB1Rs) and diacylglycerol lipase (DAGL) in the VTA. In dopaminergic neurons of VTA slices, orexin A presynaptically inhibits GABAergic transmission. This effect is prevented by internal GDP-β-S or inhibiting OX1Rs, CB1Rs, phospholipase C or DAGL, and potentiated by inhibiting 2-AG degradation. These results suggest that restraint stress activates LH orexin neurons, releasing orexins into the VTA to activate postsynaptic OX1Rs of dopaminergic neurons and generate 2-AG through a Gq-protein-phospholipase C-DAGL cascade. 2-AG retrogradely inhibits GABA release through presynaptic CB1Rs, leading to VTA dopaminergic disinhibition and reinstatement of cocaine CPP. Stress is a major cause of relapse to cocaine seeking behaviour. Tung et al. show that orexin mediates stress-induced reinstatement of cocaine seeking behaviour in mice by endocannabinoid-dependent disinhibition in the ventral tegmental area.
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Affiliation(s)
- Li-Wei Tung
- Graduate Institute of Pharmacology, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Guan-Ling Lu
- Graduate Institute of Pharmacology, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Yen-Hsien Lee
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, No. 250 Wuxing Street, Taipei 11031, Taiwan
| | - Lung Yu
- Institute of Behavioral Medicine, College of Medicine, National Cheng Kung University, No.1, University Road, Tainan City 70101, Taiwan
| | - Hsin-Jung Lee
- Department of Pharmacology, College of Medicine, National Taiwan University, Taipei 100, Taiwan
| | - Emma Leishman
- Gill Center and the Department of Psychological and Brain Sciences, Indiana University, Bloomington, Indiana 47405, USA
| | - Heather Bradshaw
- Gill Center and the Department of Psychological and Brain Sciences, Indiana University, Bloomington, Indiana 47405, USA
| | - Ling-Ling Hwang
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, No. 250 Wuxing Street, Taipei 11031, Taiwan.,Department of Physiology, College of Medicine, Taipei Medical University, No. 250 Wuxing Street, Taipei 11031, Taiwan
| | - Ming-Shiu Hung
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan, Miaoli County 35053, Taiwan
| | - Ken Mackie
- Gill Center and the Department of Psychological and Brain Sciences, Indiana University, Bloomington, Indiana 47405, USA
| | - Andreas Zimmer
- Institute for Molecular Psychiatry, Medical Faculty, University of Bonn, 53127 Bonn, Germany
| | - Lih-Chu Chiou
- Graduate Institute of Pharmacology, College of Medicine, National Taiwan University, Taipei 100, Taiwan.,Department of Pharmacology, College of Medicine, National Taiwan University, Taipei 100, Taiwan.,Graduate Institute of Brain and Mind Sciences, College of Medicine, National Taiwan University, Taipei 100, Taiwan.,Research Center for Chinese Medicine &Acupuncture, China Medical University, Taichung 40447, Taiwan
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Karlsson C, Rehman F, Damadzic R, Atkins AL, Schank JR, Gehlert DR, Steensland P, Thorsell A, Heilig M. The melanin-concentrating hormone-1 receptor modulates alcohol-induced reward and DARPP-32 phosphorylation. Psychopharmacology (Berl) 2016; 233:2355-63. [PMID: 27044354 DOI: 10.1007/s00213-016-4285-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 03/22/2016] [Indexed: 11/24/2022]
Abstract
RATIONALE Melanin-concentrating hormone (MCH) is involved in the regulation of food intake and has recently been associated with alcohol-related behaviors. Blockade of MCH-1 receptors (MCH1-Rs) attenuates operant alcohol self-administration and decreases cue-induced reinstatement, but the mechanism through which the MCH1-R influences these behaviors remains unknown. MCH1-Rs are highly expressed in the nucleus accumbens shell (NAcSh) where they are co-expressed with dopamine (DA) receptors. MCH has been shown to potentiate responses to dopamine and to increase phosphorylation of DARPP-32, an intracellular marker of DA receptor activation, in the NAcSh. METHODS In the present study, we investigated the role of the MCH1-R in alcohol reward using the conditioned place preference (CPP) paradigm. We then used immunohistochemistry (IHC) to assess activation of downstream signaling after administration of a rewarding dose of alcohol. RESULTS We found that alcohol-induced CPP was markedly decreased in mice with a genetic deletion of the MCH1-R as well as after pharmacological treatment with an MCH1-R antagonist, GW803430. In contrast, an isocaloric dose of dextrose did not produce CPP. The increase in DARPP-32 phosphorylation seen in wildtype (WT) mice after acute alcohol administration in the NAcSh was markedly reduced in MCH1-R knock-out (KO) mice. CONCLUSION Our results suggest that MCH1-Rs regulate the rewarding properties of alcohol through interactions with signaling cascades downstream of DA receptors in the NAcSh.
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Affiliation(s)
- Camilla Karlsson
- Department of Clinical and Experimental Medicine, Linkopings University, Linkoping, Sweden
| | - Faazal Rehman
- Laboratory of Clinical and Translational Studies, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Ruslan Damadzic
- Laboratory of Clinical and Translational Studies, National Institute on Alcohol Abuse and Alcoholism (NIAAA), National Institutes of Health (NIH), Bethesda, MD, USA
| | - Alison L Atkins
- Department of Clinical and Experimental Medicine, Linkopings University, Linkoping, Sweden
| | - Jesse R Schank
- Department of Physiology and Pharmacology, University of Georgia, Athens, GA, USA
| | - Donald R Gehlert
- Neuroscience and Endocrine Discovery Research, Lilly Research Laboratories, a Division of Eli Lilly and Company, Indianapolis, IN, USA
| | - Pia Steensland
- Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Annika Thorsell
- Department of Clinical and Experimental Medicine, Linkopings University, Linkoping, Sweden
| | - Markus Heilig
- Department of Clinical and Experimental Medicine, Linkopings University, Linkoping, Sweden.
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Matchynski-Franks JJ, Susick LL, Schneider BL, Perrine SA, Conti AC. Impaired Ethanol-Induced Sensitization and Decreased Cannabinoid Receptor-1 in a Model of Posttraumatic Stress Disorder. PLoS One 2016; 11:e0155759. [PMID: 27186643 PMCID: PMC4871361 DOI: 10.1371/journal.pone.0155759] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Accepted: 04/13/2016] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND AND PURPOSE Impaired striatal neuroplasticity may underlie increased alcoholism documented in those with posttraumatic stress disorder (PTSD). Cannabinoid receptor-1 (CB1) is sensitive to the effects of ethanol (EtOH) and traumatic stress, and is a critical regulator of striatal plasticity. To investigate CB1 involvement in the PTSD-alcohol interaction, this study measured the effects of traumatic stress using a model of PTSD, mouse single-prolonged stress (mSPS), on EtOH-induced locomotor sensitization and striatal CB1 levels. METHODS Mice were exposed to mSPS, which includes: 2-h restraint, 10-min group forced swim, 15-min exposure to rat bedding odor, and diethyl ether exposure until unconsciousness or control conditions. Seven days following mSPS exposure, the locomotor sensitizing effects of EtOH were assessed. CB1, post-synaptic density-95 (PSD95), and dopamine-2 receptor (D2) protein levels were then quantified in the dorsal striatum using standard immunoblotting techniques. RESULTS Mice exposed to mSPS-EtOH demonstrated impaired EtOH-induced locomotor sensitization compared to Control-EtOH mice, which was accompanied by reduced striatal CB1 levels. EtOH increased striatal PSD95 in control and mSPS-exposed mice. Additionally, mSPS-Saline exposure increased striatal PSD95 and decreased D2 protein expression, with mSPS-EtOH exposure alleviating these changes. CONCLUSIONS These data indicate that the mSPS model of PTSD blunts the behavioral sensitizing effects of EtOH, a response that suggests impaired striatal neuroplasticity. Additionally, this study demonstrates that mice exposed to mSPS and repeated EtOH exposure decreases CB1 in the striatum, providing a mechanism of interest for understanding the effects of EtOH following severe, multimodal stress exposure.
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Affiliation(s)
- Jessica J. Matchynski-Franks
- Research Service, John D. Dingell VA Medical Center, Detroit, Michigan, United States of America
- Department of Neurosurgery, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Laura L. Susick
- Research Service, John D. Dingell VA Medical Center, Detroit, Michigan, United States of America
- Department of Neurosurgery, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Brandy L. Schneider
- Research Service, John D. Dingell VA Medical Center, Detroit, Michigan, United States of America
- Department of Neurosurgery, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Shane A. Perrine
- Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Alana C. Conti
- Research Service, John D. Dingell VA Medical Center, Detroit, Michigan, United States of America
- Department of Neurosurgery, Wayne State University School of Medicine, Detroit, Michigan, United States of America
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Zhou Y, Huang T, Lee F, Kreek MJ. Involvement of Endocannabinoids in Alcohol "Binge" Drinking: Studies of Mice with Human Fatty Acid Amide Hydrolase Genetic Variation and After CB1 Receptor Antagonists. Alcohol Clin Exp Res 2016; 40:467-73. [PMID: 26857901 DOI: 10.1111/acer.12989] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 12/14/2015] [Indexed: 11/27/2022]
Abstract
BACKGROUND The endocannabinoid system has been found to play an important role in modulating alcohol intake. Inhibition or genetic deletion of fatty acid amide hydrolase (FAAH; a key catabolic enzyme for endocannabinoids) leads to increased alcohol consumption and preference in rodent models. A common human single-nucleotide polymorphism (SNP; C385A, rs324420) in the FAAH gene is associated with decreased enzymatic activity of FAAH, resulting in increased anandamide levels in both humans and FAAH C385A knock-in mice. METHODS As this FAAH SNP has been reported to be associated with altered alcohol abuse, the present study used these genetic knock-in mice containing the human SNP C385A to determine the impact of variant FAAH gene on alcohol "binge" drinking in the drinking-in-the-dark (DID) model. RESULTS We found that the FAAH(A/A) mice had greater alcohol intake and preference than the wild-type FAAH(C/C) mice, suggesting that increased endocannabinoid signaling in FAAH(A/A) mice led to increased alcohol "binge" consumption. The specificity on alcohol vulnerability was suggested by the lack of any FAAH genotype difference on sucrose or saccharin intake. Using the "binge" DID model, we confirmed that selective CB1 receptor antagonist AM251 reduced alcohol intake in the wild-type mice. CONCLUSIONS These data suggest that there is direct and selective involvement of the human FAAH C385A SNP and CB1 receptors in alcohol "binge" drinking.
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Affiliation(s)
- Yan Zhou
- Laboratory of the Biology of Addictive Diseases , The Rockefeller University, New York, New York
| | - Ted Huang
- Department of Psychiatry , Weill Cornell Medical Center, New York, New York
| | - Francis Lee
- Department of Psychiatry , Weill Cornell Medical Center, New York, New York
| | - Mary Jeanne Kreek
- Laboratory of the Biology of Addictive Diseases , The Rockefeller University, New York, New York
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Henderson-Redmond AN, Guindon J, Morgan DJ. Roles for the endocannabinoid system in ethanol-motivated behavior. Prog Neuropsychopharmacol Biol Psychiatry 2016; 65:330-9. [PMID: 26123153 PMCID: PMC4679600 DOI: 10.1016/j.pnpbp.2015.06.011] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 06/15/2015] [Accepted: 06/22/2015] [Indexed: 12/19/2022]
Abstract
Alcohol use disorder represents a significant human health problem that leads to substantial loss of human life and financial cost to society. Currently available treatment options do not adequately address this human health problem, and thus, additional therapies are desperately needed. The endocannabinoid system has been shown, using animal models, to modulate ethanol-motivated behavior, and it has also been demonstrated that chronic ethanol exposure can have potentially long-lasting effects on the endocannabinoid system. For example, chronic exposure to ethanol, in either cell culture or preclinical rodent models, causes an increase in endocannabinoid levels that results in down-regulation of the cannabinoid receptor 1 (CB1) and uncoupling of this receptor from downstream G protein signaling pathways. Using positron emission tomography (PET), similar down-regulation of CB1 has been noted in multiple regions of the brain in human alcoholic patients. In rodents, treatment with the CB1 inverse agonist SR141716A (Rimonabant), or genetic deletion of CB1 leads to a reduction in voluntary ethanol drinking, ethanol-stimulated dopamine release in the nucleus accumbens, operant self-administration of ethanol, sensitization to the locomotor effects of ethanol, and reinstatement/relapse of ethanol-motivated behavior. Although the clinical utility of Rimonabant or other antagonists/inverse agonists for CB1 is limited due to negative neuropsychiatric side effects, negative allosteric modulators of CB1 and inhibitors of endocannabinoid catabolism represent therapeutic targets worthy of additional examination.
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Affiliation(s)
| | - Josée Guindon
- Department of Pharmacology and Neuroscience, Texas Tech University Health Science Center, Lubbock, TX, 79430
| | - Daniel J Morgan
- Department of Anesthesiology, Penn State University College of Medicine, Hershey, PA 17033, United States; Department of Pharmacology, Penn State University College of Medicine, Hershey, PA 17033, United States.
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Interactions between ethanol and the endocannabinoid system at GABAergic synapses on basolateral amygdala principal neurons. Alcohol 2015; 49:781-94. [PMID: 26603632 DOI: 10.1016/j.alcohol.2015.08.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 08/11/2015] [Accepted: 08/25/2015] [Indexed: 12/30/2022]
Abstract
The basolateral amygdala (BLA) plays crucial roles in stimulus value coding, as well as drug and alcohol dependence. Ethanol alters synaptic transmission in the BLA, while endocannabinoids (eCBs) produce presynaptic depression at BLA synapses. Recent studies suggest interactions between ethanol and eCBs that have important consequences for alcohol drinking behavior. To determine how ethanol and eCBs interact in the BLA, we examined the physiology and pharmacology of GABAergic synapses onto BLA pyramidal neurons in neurons from young rats. Application of ethanol at concentrations relevant to intoxication increased, in both young and adult animals, the frequency of spontaneous and miniature GABAergic inhibitory postsynaptic currents, indicating a presynaptic site of ethanol action. Ethanol did not potentiate sIPSCs during inhibition of adenylyl cyclase while still exerting its effect during inhibition of protein kinase A. Activation of type 1 cannabinoid receptors (CB1) in the BLA inhibited GABAergic transmission via an apparent presynaptic mechanism, and prevented ethanol potentiation. Surprisingly, ethanol potentiation was also prevented by CB1 antagonists/inverse agonists. Brief depolarization of BLA pyramidal neurons suppressed GABAergic transmission (depolarization-induced suppression of inhibition [DSI]), an effect previously shown to be mediated by postsynaptic eCB release and presynaptic CB1 activation. A CB1-mediated suppression of GABAergic transmission was also produced by combined afferent stimulation at 0.1 Hz (LFS), and postsynaptic loading with the eCB arachidonoyl ethanolamide (AEA). Both DSI and LFS-induced synaptic depression were prevented by ethanol. Our findings indicate antagonistic interactions between ethanol and eCB/CB1 modulation at GABAergic BLA synapses that may contribute to eCB roles in ethanol seeking and drinking.
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Romano-López A, Méndez-Díaz M, García FG, Regalado-Santiago C, Ruiz-Contreras AE, Prospéro-García O. Maternal separation and early stress cause long-lasting effects on dopaminergic and endocannabinergic systems and alters dendritic morphology in the nucleus accumbens and frontal cortex in rats. Dev Neurobiol 2015; 76:819-31. [PMID: 26539755 DOI: 10.1002/dneu.22361] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 10/22/2015] [Accepted: 11/02/2015] [Indexed: 12/22/2022]
Abstract
A considerable amount experimental studies have shown that maternal separation (MS) is associated with adult offspring abnormal behavior and cognition disorder. Accordingly, this experimental procedure has been proposed as a predictor for alcohol and drug dependence based on the neurodevelopmental soon after birth. Endocannabinoid system (eCBs) has been implicated in reward processes, including drug abuse and dependence. MS and associated stress causes changes in the eCBs that seem to facilitate alcohol consumption. In this study, we seek to evaluate potential morphological changes in neurons of the frontal cortex (FCx) and nucleus accumbens (NAcc), in the expression of receptors and enzymes of the endocannabinoid and dopamine systems and in second messengers, such as Akt, in adult rats subjected to MS and early stress (MS + ES; 2 × 180 min daily) vs. nonseparated rats (NMS). Results showed that MS + ES induces higher D2R expression and lower D3R, FAAH, and MAGL expression compared with NMS rats. Alterations in total dendritic length were also detected and were characterized by increases in the NAcc while there were decreases in the FCx. We believe MS + ES-induced changes in the dopaminergic and endocannabinergic systems and in the neuronal microstructure might be contributing to alcohol seeking behavior and, potential vulnerability to other drugs in rats. © 2015 Wiley Periodicals, Inc. Develop Neurobiol 76: 819-831, 2016.
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Affiliation(s)
- Antonio Romano-López
- Departamento De Fisiología, Laboratorio De Canabinoides, Facultad De Medicina, Universidad Nacional Autónoma De México, Mexico City, Mexico
| | - Mónica Méndez-Díaz
- Departamento De Fisiología, Laboratorio De Canabinoides, Facultad De Medicina, Universidad Nacional Autónoma De México, Mexico City, Mexico
| | - Fabio García García
- Laboratorio De Biología Del Sueño, Instituto De Ciencias De La Salud, Universidad Veracruzana, 91160, Ver., Mexico
| | - Citlalli Regalado-Santiago
- Laboratorio De Biología Del Sueño, Instituto De Ciencias De La Salud, Universidad Veracruzana, 91160, Ver., Mexico
| | - Alejandra E Ruiz-Contreras
- Laboratorio De Neurogenómica Cognitiva, Coordinación De Psicofisiología, Facultad De Psicología, Universidad Nacional Autónoma De México, Mexico City, Mexico
| | - Oscar Prospéro-García
- Departamento De Fisiología, Laboratorio De Canabinoides, Facultad De Medicina, Universidad Nacional Autónoma De México, Mexico City, Mexico
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Aguiar AS, Lopes SC, Tristão FSM, Rial D, de Oliveira G, da Cunha C, Raisman-Vozari R, Prediger RD. Exercise Improves Cognitive Impairment and Dopamine Metabolism in MPTP-Treated Mice. Neurotox Res 2015; 29:118-25. [DOI: 10.1007/s12640-015-9566-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 09/11/2015] [Accepted: 09/28/2015] [Indexed: 12/22/2022]
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Cannabinoid Ligands and Alcohol Addiction: A Promising Therapeutic Tool or a Humbug? Neurotox Res 2015; 29:173-96. [PMID: 26353844 PMCID: PMC4701763 DOI: 10.1007/s12640-015-9555-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 08/04/2015] [Accepted: 08/06/2015] [Indexed: 01/08/2023]
Abstract
The vast therapeutic potential of cannabinoids of both synthetic and plant-derived origins currently makes these compounds the focus of a growing interest. Although cannabinoids are still illicit drugs, their possible clinical usefulness, including treatment of acute or neuropathic pain, have been suggested by several studies. In addition, some observations indicate that cannabinoid receptor antagonists may be useful for the treatment of alcohol dependence and addiction, which is a major health concern worldwide. While the synergism between alcohol and cannabinoid agonists (in various forms) creates undesirable side effects when the two are consumed together, the administration of CB1 antagonists leads to a significant reduction in alcohol consumption. Furthermore, cannabinoid antagonists also mitigate alcohol withdrawal symptoms. Herein, we present an overview of studies focusing on the effects of cannabinoid ligands (agonists and antagonists) during acute or chronic consumption of ethanol.
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Alterations in the hippocampal phosphorylated CREB expression in drug state-dependent learning. Behav Brain Res 2015; 292:109-15. [PMID: 26055203 DOI: 10.1016/j.bbr.2015.06.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Revised: 06/01/2015] [Accepted: 06/03/2015] [Indexed: 01/08/2023]
Abstract
The present study investigated the possible alterations of hippocampal CREB phosphorylation in drug state-dependent memory retrieval. One-trial step-down passive avoidance task was used to assess memory retrieval in adult male NMRI mice. Pre-training administration of ethanol (1g/kg, i.p.) induced amnesia. Pre-test administration of ethanol (1g/kg, i.p) or nicotine (0.7 mg/kg, s.c.) reversed ethanol-induced amnesia, indicating ethanol- or ethanol-nicotine induced state-dependent learning (STD). Using Western blot analysis, it was found that the p-CREB/CREB ratio in the hippocampus increased in the mice that showed successful memory retrieval as compared with untrained mice. In contrast, pre-training administration of ethanol (1g/kg, i.p.) decreased the hippocampal p-CREB/CREB ratio in comparison with the control group. The hippocampal p-CREB/CREB ratio enhanced in ethanol- and ethanol-nicotine induced STD. Moreover, memory impairment induced by pre-training administration of WIN (1 mg/kg, i.p.) improved in the animals that received pre-test administration of WIN (1 mg/kg, i.p.), ethanol (0.5 g/kg, i.p.) or nicotine (0.7 mg/kg, s.c.), suggesting a cross STD between the drugs. The p-CREB/CREB ratio in the hippocampus decreased in the of WIN-induced amnesia and STD groups in comparison with the control group. In addition, cross state-dependent learning between WIN and ethanol or nicotine was associated with the increase of the hippocampal p-CREB/CREB ratio. It can be concluded that phosphorylation of CREB in the hippocampus is a critical event underlying the interaction of co-administration of drugs on memory retrieval in passive avoidance learning.
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