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Lin J, Rivadeneira AP, Ye Y, Ryu C, Parvin S, Jang K, Garraway SM, Choi I. Sodium Bicarbonate Decreases Alcohol Consumption in Mice. Int J Mol Sci 2024; 25:5006. [PMID: 38732226 PMCID: PMC11084513 DOI: 10.3390/ijms25095006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/26/2024] [Accepted: 04/28/2024] [Indexed: 05/13/2024] Open
Abstract
We previously reported that mice with low neuronal pH drink more alcohol, demonstrating the importance of pH for alcohol reward and motivation. In this study, we tested whether systemic pH affects alcohol consumption and if so, whether it occurs by changing the alcohol reward. C57BL/6J mice were given NaHCO3 to raise their blood pH, and the animals' alcohol consumption was measured in the drinking-in-the-dark and two-bottle free choice paradigms. Alcohol consumption was also assessed after suppressing the bitterness of NaHCO3 with sucrose. Alcohol reward was evaluated using a conditioned place preference. In addition, taste sensitivity was assessed by determining quinine and sucrose preference. The results revealed that a pH increase by NaHCO3 caused mice to decrease their alcohol consumption. The decrease in high alcohol contents (20%) was significant and observed at different ages, as well as in both males and females. Alcohol consumption was also decreased after suppressing NaHCO3 bitterness. Oral gavage of NaHCO3 did not alter quinine and sucrose preference. In the conditioned place preference, NaHCO3-treated mice spent less time in the alcohol-injected chamber. Conclusively, the results show that raising systemic pH with NaHCO3 decreases alcohol consumption, as it decreases the alcohol reward value.
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Affiliation(s)
| | | | | | | | | | | | | | - Inyeong Choi
- Department of Cell Biology, Emory University School of Medicine, Atlanta, GA 30322, USA; (J.L.); (Y.Y.); (C.R.); (S.P.); (K.J.); (S.M.G.)
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2
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Körber C, Sommer WH. From ensembles to meta-ensembles: Specific reward encoding by correlated network activity. Front Behav Neurosci 2022; 16:977474. [PMID: 36177094 PMCID: PMC9513968 DOI: 10.3389/fnbeh.2022.977474] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Accepted: 08/15/2022] [Indexed: 11/29/2022] Open
Abstract
Neuronal ensembles are local, sparsely distributed populations of neurons that are reliably re-activated by a specific stimulus, context or task. Such discrete cell populations can be defined either functionally, by electrophysiological recordings or in vivo calcium imaging, or anatomically, using the expression of markers such as the immediate early gene cFos. A typical example of tasks that involve the formation of neuronal ensembles is reward learning, such as the cue-reward pairing during operant conditioning. These ensembles are re-activated during cue-presentation and increasing evidence suggests that this re-activation is the neurophysiological basis for the execution of reward-seeking behavior. Whilst the pursuit of rewards is a common daily activity, it is also related to the consumption of drugs, such as alcohol, and may result in problematic behaviors including addiction. Recent research has identified neuronal ensembles in several reward-related brain regions that control distinct aspects of a conditioned response, e.g., contextual information about the availability of a specific reward or the actions needed to retrieve this reward under the given circumstances. Here, we review studies using the activity marker cFos to identify and characterize neuronal ensembles related to alcohol and non-drug rewards with a special emphasis on the discrimination between different rewards by meta-ensembles, i.e., by dynamic co-activation of multiple ensembles across different brain areas.
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Affiliation(s)
- Christoph Körber
- Department of Functional Neuroanatomy, Institute of Anatomy and Cell Biology, Heidelberg University, Heidelberg, Germany
| | - Wolfgang H Sommer
- Medical Faculty Mannheim, Institute of Psychopharmacology, Central Institute of Mental Health, Heidelberg University, Mannheim, Germany
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3
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Czarnecki D, Ziółkowski M, Chodkiewicz J, Długosz A, Feldheim J, Waszkiewicz N, Kułak-Bejda A, Gorzkiewicz M, Budzyński J, Junkiert-Czarnecka A, Siomek-Górecka A, Nicpoń K, Kawala-Sterniuk A, Ferri R, Pelc M, Walecki P, Laskowska E, Gorzelańczyk EJ. Initial Study on COMT and DRD2 Gene Polymorphisms as Well as the Influence of Temperament and Character Trait on the Severity of Alcohol Craving in Alcohol-Dependent Patients. J Clin Med 2021; 10:jcm10245892. [PMID: 34945190 PMCID: PMC8704345 DOI: 10.3390/jcm10245892] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/07/2021] [Accepted: 12/12/2021] [Indexed: 12/31/2022] Open
Abstract
The main aim of this work was to determine the impact of COMT and DRD2 gene polymorphisms together with temperament and character traits on alcohol craving severity alcohol-dependent persons. The sample comprised of 89 men and 16 women (aged 38±7). For the sake of psychological assessment various analytic methods have been applied like the Short Alcohol Dependence Data Questionnaire (SADD), Penn Alcohol Craving Scale (PACS) or Temperament and Character Inventory (TCI) test. The SNP polymorphism of the analyzed genes was determined by Real Time PCR test. The results showed, that the COMT polymorphismmay have an indirected relationship with the intensity and changes in alcohol craving during abstinence. The DRD2 receptor gene polymorphisms are related with the intensity of alcohol craving. It seems that the character traits like “self-targeting”, including “self-acceptance”, are more closely related to the severity of alcohol craving and polymorphic changes in the DRD2 receptor than temperamental traits. Although this is a pilot study the obtained results appeared to be promising and clearly indicate the link betweengene polymorphisms alcohol craving and its severity.
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Affiliation(s)
- Damian Czarnecki
- Department of Preventive Nursing, Collegium Medicum, Nicolaus Copernicus University, Torun, ul. Ignacego Łukasiewicza 1, 85-821 Bydgoszcz, Poland; (M.Z.); (K.N.)
- Correspondence: (D.C.); (A.K.-S.)
| | - Marcin Ziółkowski
- Department of Preventive Nursing, Collegium Medicum, Nicolaus Copernicus University, Torun, ul. Ignacego Łukasiewicza 1, 85-821 Bydgoszcz, Poland; (M.Z.); (K.N.)
| | - Jan Chodkiewicz
- Institute of Psychology, Department of Clinical Psychology and Psychopathology, University of Lodz, ul. Smugowa 10/12, 91-433 Łódź, Poland;
| | - Anna Długosz
- Faculty of Chemical Technology and Engineering, University of Science and Technology, ul. Seminaryjna 3, 85-326 Bydgoszcz, Poland; (A.D.); (J.F.)
| | - Joanna Feldheim
- Faculty of Chemical Technology and Engineering, University of Science and Technology, ul. Seminaryjna 3, 85-326 Bydgoszcz, Poland; (A.D.); (J.F.)
| | - Napoleon Waszkiewicz
- Department of Psychiatry, Medical University of Białystok, pl. Brodowicza 1, 16-070 Choroszcz, Poland; (N.W.); (A.K.-B.)
| | - Agnieszka Kułak-Bejda
- Department of Psychiatry, Medical University of Białystok, pl. Brodowicza 1, 16-070 Choroszcz, Poland; (N.W.); (A.K.-B.)
| | - Marta Gorzkiewicz
- Department of Molecular Genetics and Justice, Collegium Medicum, Nicolaus Copernicus University, Torun, ul. Marii Skłodowskiej-Curie 9, 85-094 Bydgoszcz, Poland;
| | - Jacek Budzyński
- Department of Vascular and Internal Diseases, Nicolaus Copernicus University, Torun, ul. Ujejskiego 75, 85-168 Bydgoszcz, Poland;
| | - Anna Junkiert-Czarnecka
- Department of Clinical Genetics, Nicolaus Copernicus University, Torun, ul. Marii Skłodowskiej-Curie 9, 85-094 Bydgoszcz, Poland;
| | - Agnieszka Siomek-Górecka
- Department of Clinical Biochemistry, Collegium Medicum, Nicolaus Copernicus University, Torun, ul. Karłowicza 24, 85-092 Bydgoszcz, Poland;
| | - Krzysztof Nicpoń
- Department of Preventive Nursing, Collegium Medicum, Nicolaus Copernicus University, Torun, ul. Ignacego Łukasiewicza 1, 85-821 Bydgoszcz, Poland; (M.Z.); (K.N.)
| | - Aleksandra Kawala-Sterniuk
- Faculty of Electrical Engineering, Automatic Control and Informatics, Opole University of Technology, ul. Prószkowska 76, 45-758 Opole, Poland;
- Correspondence: (D.C.); (A.K.-S.)
| | - Raffaele Ferri
- Oasi Research Institute IRCCS, Via C. Ruggero, 73, 94018 Troina, Italy;
| | - Mariusz Pelc
- Faculty of Electrical Engineering, Automatic Control and Informatics, Opole University of Technology, ul. Prószkowska 76, 45-758 Opole, Poland;
- School of Computing and Mathematical Sciences, University of Greenwich, London SE10 9LS, UK
| | - Piotr Walecki
- Department of Bioinformatics and Telemedicine, Collegium Medicum, Jagiellonian University, ul. Medyczna 7, 30-688 Krakow, Poland;
| | - Ewa Laskowska
- Faculty of Medicine, Collegium Medicum, Nicolaus Copernicus University, Torun, ul. Jagiellońska 15, 85-067 Bydgoszcz, Poland;
| | - Edward Jacek Gorzelańczyk
- Department of Theoretical Basis of BioMedical Sciences and Medical Informatics, Collegium Medicum, Nicolaus Copernicus University, ul. Jagiellońska 15, 85-067 Bydgoszcz, Poland;
- Institute of Philosophy, Kazimierz Wielki University, ul. Ogińskiego 16, 85-092 Bydgoszcz, Poland
- Babinski Specialist Psychiatric Healthcare Center, Outpatient Addiction Treatment, ul. Aleksandrowska 159, 91-229 Łódź, Poland
- The Society for the Substitution Treatment of Addiction “Medically Assisted Recovery”, ul. Rzeźniackiego 1D, 85-791 Bydgoszcz, Poland
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Liu CM, Hsu TM, Suarez AN, Subramanian KS, Fatemi RA, Cortella AM, Noble EE, Roitman MF, Kanoski SE. Central oxytocin signaling inhibits food reward-motivated behaviors and VTA dopamine responses to food-predictive cues in male rats. Horm Behav 2020; 126:104855. [PMID: 32991888 PMCID: PMC7757852 DOI: 10.1016/j.yhbeh.2020.104855] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 08/02/2020] [Accepted: 08/23/2020] [Indexed: 01/08/2023]
Abstract
Oxytocin potently reduces food intake and is a potential target system for obesity treatment. A better understanding of the behavioral and neurobiological mechanisms mediating oxytocin's anorexigenic effects may guide more effective obesity pharmacotherapy development. The present study examined the effects of central (lateral intracerebroventricular [ICV]) administration of oxytocin in rats on motivated responding for palatable food. Various conditioning procedures were employed to measure distinct appetitive behavioral domains, including food seeking in the absence of consumption (conditioned place preference expression), impulsive responding for food (differential reinforcement of low rates of responding), effort-based appetitive decision making (high-effort palatable vs. low-effort bland food), and sucrose reward value encoding following a motivational shift (incentive learning). Results reveal that ICV oxytocin potently reduces food-seeking behavior, impulsivity, and effort-based palatable food choice, yet does not influence encoding of sucrose reward value in the incentive learning task. To investigate a potential neurobiological mechanism mediating these behavioral outcomes, we utilized in vivo fiber photometry in ventral tegmental area (VTA) dopamine neurons to examine oxytocin's effect on phasic dopamine neuron responses to sucrose-predictive Pavlovian cues. Results reveal that ICV oxytocin significantly reduced food cue-evoked dopamine neuron activity. Collectively, these data reveal that central oxytocin signaling inhibits various obesity-relevant conditioned appetitive behaviors, potentially via reductions in food cue-driven phasic dopamine neural responses in the VTA.
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Affiliation(s)
- Clarissa M Liu
- Neuroscience Graduate Program, University of Southern California, Los Angeles, CA, United States; Department of Biological Sciences, Human and Evolutionary Biology Section, University of Southern California, 3616 Trousdale Parkway, AHF 252, Los Angeles, CA 90089, United States
| | - Ted M Hsu
- Department of Psychology, University of Illinois at Chicago, 1007 W. Harrison St., Chicago, IL 60607-7137, United States
| | - Andrea N Suarez
- Department of Biological Sciences, Human and Evolutionary Biology Section, University of Southern California, 3616 Trousdale Parkway, AHF 252, Los Angeles, CA 90089, United States
| | - Keshav S Subramanian
- Neuroscience Graduate Program, University of Southern California, Los Angeles, CA, United States; Department of Biological Sciences, Human and Evolutionary Biology Section, University of Southern California, 3616 Trousdale Parkway, AHF 252, Los Angeles, CA 90089, United States
| | - Ryan A Fatemi
- Department of Biological Sciences, Human and Evolutionary Biology Section, University of Southern California, 3616 Trousdale Parkway, AHF 252, Los Angeles, CA 90089, United States
| | - Alyssa M Cortella
- Department of Biological Sciences, Human and Evolutionary Biology Section, University of Southern California, 3616 Trousdale Parkway, AHF 252, Los Angeles, CA 90089, United States
| | - Emily E Noble
- Department of Foods and Nutrition, University of Georgia, 129 Barrow Hall, Athens, GA 30602, United States
| | - Mitchell F Roitman
- Department of Psychology, University of Illinois at Chicago, 1007 W. Harrison St., Chicago, IL 60607-7137, United States
| | - Scott E Kanoski
- Neuroscience Graduate Program, University of Southern California, Los Angeles, CA, United States; Department of Biological Sciences, Human and Evolutionary Biology Section, University of Southern California, 3616 Trousdale Parkway, AHF 252, Los Angeles, CA 90089, United States.
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5
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Schank JR, Lee S, Gonzalez-Islas CE, Nennig SE, Fulenwider HD, Chang J, Li JM, Kim Y, Jeffers LA, Chung J, Lee JK, Jin Z, Aalkjaer C, Boedtkjer E, Choi I. Increased Alcohol Consumption in Mice Lacking Sodium Bicarbonate Transporter NBCn1. Sci Rep 2020; 10:11017. [PMID: 32620847 PMCID: PMC7335059 DOI: 10.1038/s41598-020-67291-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Accepted: 05/26/2020] [Indexed: 12/21/2022] Open
Abstract
The previous reports on an addiction vulnerability marker in the human SLC4A7 gene encoding the Na/HCO3 transporter NBCn1 suggest that this pH-regulating protein may affect alcohol-related behavior and response. Here, we examined alcohol consumption and sensitivity to the sedative effects of alcohol in male NBCn1 knockout mice. These mice displayed lower pH in neurons than wildtype controls, determined by intracellular pH in hippocampal neuronal cultures. Neurons from knockout mice had a higher action potential threshold and a more depolarized membrane potential, thus reducing membrane excitability. In a two-bottle free choice procedure, knockout mice consumed more alcohol than controls and consistently increased alcohol consumption after repeated alcohol deprivation periods. Quinine and sucrose preference was similar between genotypes. Knockout mice showed increased propensity for alcohol-induced conditioned place preference. In loss of righting reflex assessment, knockout mice revealed increased sensitivity to alcohol-induced sedation and developed tolerance to the sedation after repeated alcohol administrations. Furthermore, chronic alcohol consumption caused NBCn1 downregulation in the hippocampus and striatum of mice and humans. These results demonstrate an important role of NBCn1 in regulation of alcohol consumption and sensitivity to alcohol-induced sedation.
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Affiliation(s)
- Jesse R Schank
- Department of Physiology and Pharmacology, University of Georgia College of Veterinary Medicine, Athens, GA, 30602, USA
| | - Soojung Lee
- Department of Physiology, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | | | - Sadie E Nennig
- Department of Physiology and Pharmacology, University of Georgia College of Veterinary Medicine, Athens, GA, 30602, USA
| | - Hannah D Fulenwider
- Department of Physiology and Pharmacology, University of Georgia College of Veterinary Medicine, Athens, GA, 30602, USA
| | - Jianjun Chang
- Department of Physiology, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Jun Ming Li
- Department of Physiology, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Yejin Kim
- Department of Physiology, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Lauren A Jeffers
- Department of Medicine, Pulmonary Division, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Jaegwon Chung
- Department of Physiology and Pharmacology, University of Georgia College of Veterinary Medicine, Athens, GA, 30602, USA
| | - Jae-Kyung Lee
- Department of Physiology and Pharmacology, University of Georgia College of Veterinary Medicine, Athens, GA, 30602, USA
| | - Zhe Jin
- Department of Neuroscience, Uppsala University, Uppsala, 75124, Sweden
| | | | - Ebbe Boedtkjer
- Department of Biomedicine, Aarhus University, 8000, Aarhus C, Denmark
| | - Inyeong Choi
- Department of Physiology, Emory University School of Medicine, Atlanta, GA, 30322, USA.
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6
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Nennig SE, Fulenwider HD, Eskew JE, Whiting KE, Cotton MR, McGinty GE, Solomon MG, Schank JR. Intermittent Ethanol Access Increases Sensitivity to Social Defeat Stress. Alcohol Clin Exp Res 2020; 44:600-610. [PMID: 31957041 DOI: 10.1111/acer.14278] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 01/03/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND Comorbidity between alcoholism and depression is extremely common. Recent evidence supports a relationship between alcohol exposure and stress sensitivity, an underlying factor in the development of depression. Our laboratory has recently shown that chronic alcohol gavage increases sensitivity to social defeat stress (SDS). However, the effects of voluntary alcohol consumption, resulting from protocols such as intermittent ethanol access (IEA), on defeat stress sensitivity have yet to be elucidated. METHODS We first assessed the effects of 4 weeks of IEA to 20% alcohol on sensitivity to subthreshold SDS exposure. Next, to examine neuroinflammatory mechanisms, we analyzed gene expression of inhibitor of NFkB (IkB) following IEA or chronic alcohol exposure (10 days of 3.0 g/kg alcohol via intragastric gavage). Then, we quantified NFkB activation via β-galactosidase immunohistochemistry following IEA or chronic alcohol gavage in NFkB-LacZ mice. RESULTS IEA-exposed mice displayed an increase in sensitivity to subthreshold SDS compared to water-drinking controls. We also found that IkB gene expression was decreased in the nucleus accumbens (NAC) and amygdala (AMY) following IEA but was not altered following chronic alcohol gavage. Finally, we observed increased NFkB activity in the central amygdala (CEA), basolateral amygdala (BLA), and medial amygdala (MEA) after IEA, and increased NFkB activity solely in the CEA following chronic alcohol gavage. CONCLUSIONS These findings further corroborate that prior alcohol exposure, in this case intermittent voluntary consumption, can impact development of depressive-like behavior by altering stress sensitivity. Furthermore, our results suggest the CEA as a potential mediator of alcohol's effects on stress sensitivity, as NFkB was activated in this region following both IEA and chronic alcohol gavage. Thus, this study provides novel insight on alterations in the NFkB pathway and identifies specific regions to target in future experiments assessing the functional role of NFkB in these processes.
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Affiliation(s)
- Sadie E Nennig
- From the, Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia
| | - Hannah D Fulenwider
- From the, Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia
| | - Jacob E Eskew
- From the, Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia
| | - Kimberly E Whiting
- From the, Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia
| | - Mallory R Cotton
- From the, Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia
| | - Gabrielle E McGinty
- From the, Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia
| | - Matthew G Solomon
- From the, Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia
| | - Jesse R Schank
- From the, Department of Physiology and Pharmacology, College of Veterinary Medicine, University of Georgia, Athens, Georgia
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7
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Heilig M, Augier E, Pfarr S, Sommer WH. Developing neuroscience-based treatments for alcohol addiction: A matter of choice? Transl Psychiatry 2019; 9:255. [PMID: 31594920 PMCID: PMC6783461 DOI: 10.1038/s41398-019-0591-6] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 07/05/2019] [Accepted: 08/08/2019] [Indexed: 12/15/2022] Open
Abstract
Excessive alcohol use is the cause of an ongoing public health crisis, and accounts for ~5% of global disease burden. A minority of people with recreational alcohol use develop alcohol addiction (hereafter equated with "alcohol dependence" or simply "alcoholism"), a condition characterized by a systematically biased choice preference for alcohol at the expense of healthy rewards, and continued use despite adverse consequences ("compulsivity"). Alcoholism is arguably the most pressing area of unmet medical needs in psychiatry, with only a small fraction of patients receiving effective, evidence-based treatments. Medications currently approved for the treatment of alcoholism have small effect sizes, and their clinical uptake is negligible. No mechanistically new medications have been approved since 2004, and promising preclinical results have failed to translate into novel treatments. This has contributed to a reemerging debate whether and to what extent alcohol addiction represents a medical condition, or reflects maladaptive choices without an underlying brain pathology. Here, we review this landscape, and discuss the challenges, lessons learned, and opportunities to retool drug development in this important therapeutic area.
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Affiliation(s)
- Markus Heilig
- Center for Social and Affective Neuroscience, Department of Clinical and Experimental Medicine, Linköping University, S-581 83, Linköping, Sweden.
| | - Eric Augier
- 0000 0001 2162 9922grid.5640.7Center for Social and Affective Neuroscience, Department of Clinical and Experimental Medicine, Linköping University, S-581 83 Linköping, Sweden
| | - Simone Pfarr
- 0000 0004 0477 2235grid.413757.3Institute of Psychopharmacology, Central Institute of Mental Health (CIMH), J 5, 68159 Mannheim, Germany
| | - Wolfgang H. Sommer
- 0000 0004 0477 2235grid.413757.3Institute of Psychopharmacology, Central Institute of Mental Health (CIMH), J 5, 68159 Mannheim, Germany ,0000 0004 0477 2235grid.413757.3Department of Addiction Medicine, Central Institute of Mental Health (CIMH), J 5, 68159 Mannheim, Germany
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