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Kumar P, Chaudhary A, Rai V. Evaluation of the Relationship Between Dopamine Receptor D2 Gene TaqIA1 Polymorphism and Alcohol Dependence Risk. Indian J Clin Biochem 2024; 39:301-311. [PMID: 39005876 PMCID: PMC11239648 DOI: 10.1007/s12291-023-01122-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Accepted: 02/20/2023] [Indexed: 04/03/2023]
Abstract
Several studies are published, that investigated dopamine receptor 2 (DRD2) gene TaqIA polymorphism as a risk factor for alcohol dependence (AD) with positive and negative associations. To derive a more precise estimation of the relationship, a meta-analysis of case-control studies that examined the association between DRD2 gene Taq1A polymorphism and alcohol dependence was performed. Eligible articles were identified through a search of databases including PubMed, Science Direct, Springer link, and Google Scholar. The association between the DRD2 TaqIA polymorphism and AD susceptibility was conducted using odds ratios (ORs) and 95% confidence intervals (95% CIs) as association measures. A total of 69 studies with 9125 cases and 9123 healthy controls were included in the current meta-analysis. Results of the present analysis showed significant association between DRD2 TaqIA polymorphism and AD risk using five genetic modes (allele contrast model-OR 1.22, 95% CI 1.13-1.32, p < 0.0001; homozygote model-OR 1.35, 95%CI 1.18-1.55; p ≤ 0.0001; dominant model-OR 1.29; 95% CI 1.20-1.39; p < 0.0001; recessive model-OR 1.21; 95% CI 1.08-1.36; p = 0.0006). There was no significant association found in subgroup analysis, TaqIA polymorphism was not significantly associated with AD risk in the Asian population under all genetic models, but in the Caucasian population, TaqIA polymorphism was significantly associated with AD risk. Overall, results support the hypothesis that DRD2 Taq1A polymorphism plays a role in alcohol dependence.
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Affiliation(s)
- Pradeep Kumar
- Human Molecular Genetics Laboratory, Department of Biotechnology, VBS Purvanchal University, Jaunpur, UP 222003 India
| | - Amrita Chaudhary
- Human Molecular Genetics Laboratory, Department of Biotechnology, VBS Purvanchal University, Jaunpur, UP 222003 India
| | - Vandana Rai
- Human Molecular Genetics Laboratory, Department of Biotechnology, VBS Purvanchal University, Jaunpur, UP 222003 India
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2
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Mehlig K, Berg C, Björck L, Nyberg F, Olin AC, Rosengren A, Strandhagen E, Torén K, Thelle DS, Lissner L. Cohort Profile: The INTERGENE Study. Int J Epidemiol 2018; 46:1742-1743h. [PMID: 28186561 DOI: 10.1093/ije/dyw332] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/24/2016] [Indexed: 12/17/2022] Open
Affiliation(s)
- Kirsten Mehlig
- Section for Epidemiology and Social Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Christina Berg
- Department of Food and Nutrition, and Sport Science, University of Gothenburg, Gothenburg, Sweden
| | - Lena Björck
- Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Institute of Health and Care Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Fredrik Nyberg
- Section for Occupational and Environmental Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Medical Evidence and Observational Research Centre, Global Medical Affairs, AstraZeneca Gothenburg, Mölndal, Sweden
| | - Anna-Carin Olin
- Section for Occupational and Environmental Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Annika Rosengren
- Section for Epidemiology and Social Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Elisabeth Strandhagen
- Section for Epidemiology and Social Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Kjell Torén
- Section for Occupational and Environmental Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Dag S Thelle
- Section for Epidemiology and Social Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Biostatistics, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Lauren Lissner
- Section for Epidemiology and Social Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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Balldin J, Berglund KJ, Berggren U, Wennberg P, Fahlke C. TAQ1A1 Allele of the DRD2 Gene Region Contribute to Shorter Survival Time in Alcohol Dependent Individuals When Controlling for the Influence of Age and Gender. A Follow-up Study of 18 Years. Alcohol Alcohol 2018; 53:216-220. [PMID: 29236941 DOI: 10.1093/alcalc/agx089] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 10/10/2017] [Indexed: 11/13/2022] Open
Abstract
Aims To investigate the influence of the A1 allele of the TAQ1A polymorphism in the dopamine D2 receptor (DRD2) gene region on mortality in adult individuals with alcohol dependence. Methods The study sample consisted of 359 alcohol-dependent individuals treated for severe alcohol withdrawal symptoms in 1997. Years of survival was studied in an 18-year follow-up. In the analyses, gender and age were controlled for. Results At the 18-year follow-up, 53% individuals had deceased. The analyses showed that older age (P < 0.001), male gender (P < 0.05) and carrying the A1 allele (P < 0.01) all significantly and independently contributed to shorten years of survival. Among the deceased individuals, the genotype A1+ was the only significant contributor to shorten years of survival. Conclusions An important contribution of the present study is that in alcohol dependence the Taq1A1 allele of the DRD2 gene region is a risk factor for premature death of similar importance as the well-known risk factors of age and gender. Short Summary We investigated the influence of A1 allele of the TAQ1A polymorphism in DRD2 receptor gene region on mortality in alcohol-dependent individuals in an 18-year follow-up. Age, gender and the A1 allele contributed to shorten years of survival. Among the deceased, the A1+ was the only contributor to shorten years of survival.
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Affiliation(s)
- Jan Balldin
- Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, Sahlgrenska Academy at the University of Gothenburg, PO Box 430, SE-405 30 Göteborg, Sweden
| | - Kristina J Berglund
- Department of Psychology, University of Gothenburg, PO Box 500, SE-405 30 Göteborg, Sweden
| | - Ulf Berggren
- Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, Sahlgrenska Academy at the University of Gothenburg, PO Box 430, SE-405 30 Göteborg, Sweden
| | - Peter Wennberg
- Centre for Social Research on Alcohol and Drugs, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Claudia Fahlke
- Department of Psychology, University of Gothenburg, PO Box 500, SE-405 30 Göteborg, Sweden
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4
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Panduro A, Ramos-Lopez O, Campollo O, Zepeda-Carrillo EA, Gonzalez-Aldaco K, Torres-Valadez R, Roman S. High frequency of the DRD2/ANKK1 A1 allele in Mexican Native Amerindians and Mestizos and its association with alcohol consumption. Drug Alcohol Depend 2017; 172:66-72. [PMID: 28152448 DOI: 10.1016/j.drugalcdep.2016.12.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Revised: 11/28/2016] [Accepted: 12/01/2016] [Indexed: 02/07/2023]
Abstract
BACKGROUND Mexico has an ancient tradition of alcohol drinking influenced by genetic and sociocultural factors. This study aimed to determine the distribution of the DRD2/ANKK1 TaqIA polymorphism in Mexican populations and to analyze its association with heavy drinking. METHODS In a cross-sectional and analytical study, 680 unrelated subjects including two Native Amerindians groups (87 Nahuas and 139 Huicholes), and two Mestizos groups (158 subjects from Tepic, Nayarit and 296 subjects from Guadalajara, Jalisco) were enrolled. DRD2/ANKK1 genotyping was performed by PCR-RFLP and allelic discrimination assays. Genetic analyses were conducted by Arlequin and Structure software. Heavy drinking was defined as ≥300g alcohol/week. The association of the DRD2/ANKK1 TaqIA polymorphism with heavy drinking was estimated. RESULTS Heavy drinking was prevalent in 64.7% of the study population. The DRD2/ANKK1 A1 allele prevailed in 67% and 65% of Nahuas and Huicholes, respectively and 51% and 47.3% in Mestizos from Tepic and Guadalajara, respectively. Heavy drinking was associated with the A1A1 genotype in the Mestizos of Guadalajara (A1A1 vs. A1A2 OR=4.79, 95%CI 1.81-12.68, p=0.0006; A1A1 vs. A1A2+A2A2, OR=4.09, 95%CI 1.56-10.68, p=0.0021) and in the Mestizos from Tepic (A1A1 vs. A1A2, OR=5.92, 95%CI 2.12-16.49, p=0.0002); A2A2, OR=14.56, 95%CI 3.57-59.24, p=0.00004); A1A2+A2A2, OR=6.68, 95%CI 2.42-18.42, p=0.00005). In Native Amerindians, a lack of association was found. CONCLUSIONS High frequencies of the DRD2/ANKK1 A1 allele were present in Mexican populations. Native Amerindians exhibited the highest frequencies of the A1 allele documented worldwide to date. The A1A1 genotype was associated with heavy drinking in Mestizos.
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Affiliation(s)
- Arturo Panduro
- Department of Molecular Biology in Medicine, Civil Hospital of Guadalajara, "Fray Antonio Alcalde," Guadalajara, Jalisco, Mexico; Health Sciences Center, University of Guadalajara, Guadalajara, Jalisco, Mexico.
| | - Omar Ramos-Lopez
- Department of Molecular Biology in Medicine, Civil Hospital of Guadalajara, "Fray Antonio Alcalde," Guadalajara, Jalisco, Mexico; Health Sciences Center, University of Guadalajara, Guadalajara, Jalisco, Mexico
| | - Octavio Campollo
- Center for the Study of Alcoholism and Addictions, Guadalajara, Jalisco, Mexico; Health Sciences Center, University of Guadalajara, Guadalajara, Jalisco, Mexico
| | - Eloy Alfonso Zepeda-Carrillo
- Department of Molecular Biology in Medicine, Civil Hospital of Guadalajara, "Fray Antonio Alcalde," Guadalajara, Jalisco, Mexico; Health Sciences Center, University of Guadalajara, Guadalajara, Jalisco, Mexico
| | - Karina Gonzalez-Aldaco
- Department of Molecular Biology in Medicine, Civil Hospital of Guadalajara, "Fray Antonio Alcalde," Guadalajara, Jalisco, Mexico; Health Sciences Center, University of Guadalajara, Guadalajara, Jalisco, Mexico
| | - Rafael Torres-Valadez
- Department of Molecular Biology in Medicine, Civil Hospital of Guadalajara, "Fray Antonio Alcalde," Guadalajara, Jalisco, Mexico; Health Sciences Center, University of Guadalajara, Guadalajara, Jalisco, Mexico
| | - Sonia Roman
- Department of Molecular Biology in Medicine, Civil Hospital of Guadalajara, "Fray Antonio Alcalde," Guadalajara, Jalisco, Mexico; Health Sciences Center, University of Guadalajara, Guadalajara, Jalisco, Mexico
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5
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Blum K, Febo M, Badgaiyan RD, Demetrovics Z, Simpatico T, Fahlke C, Li M, Dushaj K, Gold MS. Common Neurogenetic Diagnosis and Meso-Limbic Manipulation of Hypodopaminergic Function in Reward Deficiency Syndrome (RDS): Changing the Recovery Landscape. Curr Neuropharmacol 2017; 15:184-194. [PMID: 27174576 PMCID: PMC5327445 DOI: 10.2174/1570159x13666160512150918] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 04/11/2016] [Accepted: 04/21/2016] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND In 1990, Blum and associates provided the first confirmed genetic link between the DRD2 polymorphisms and alcoholism. This finding was based on an earlier conceptual framework, which served as a blueprint for their seminal genetic association discovery they termed "Brain Reward Cascade." These findings were followed by a new way of understanding all addictive behaviors (substance and non-substance) termed "Reward Deficiency Syndrome" (RDS). RDS incorporates a complex multifaceted array of inheritable behaviors that are polygenic. OBJECTIVE In this review article, we attempt to clarify these terms and provide a working model to accurately diagnose and treat these unwanted behaviors. METHOD We are hereby proposing the development of a translational model we term "Reward Deficiency Solution System™" that incorporates neurogenetic testing and meso-limbic manipulation of a "hypodopaminergic" trait/state, which provides dopamine agonistic therapy (DAT) as well as reduced "dopamine resistance," while embracing "dopamine homeostasis." RESULT The result is better recovery and relapse prevention, despite DNA antecedents, which could impact the recovery process and relapse. Understanding the commonality of mental illness will transform erroneous labeling based on symptomatology, into a genetic and anatomical etiology. WC: 184.
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Affiliation(s)
- Kenneth Blum
- Department of Psychiatry, University of Florida College of Medicine and McKnight Brain Institute, Gainesville, FL, USA
- Department of Nutrigenomics, RDSolutions, Inc., Salt Lake City, UT, USA
- Department of Psychology, Eotvos Lorand University, Budapest, Hungary
- PATH Foundation NY, New York, NY, USA
- Division of Neuroscience Research and Addiction Therapy, The Shores Treatment and Recovery, Port Saint Lucie, FL, USA
| | - Marcelo Febo
- Department of Psychiatry, University of Florida College of Medicine and McKnight Brain Institute, Gainesville, FL, USA
| | - Rajendra D. Badgaiyan
- Division of Neuroimaging, Department of Psychiatry, University of Minnesota College of Medicine, Minneapolis, MN, USA;
| | - Zsolt Demetrovics
- Department of Psychology, Eotvos Lorand University, Budapest, Hungary
| | - Thomas Simpatico
- Department of Psychiatry, University of Vermont, Burlington, VT, USA
| | - Claudia Fahlke
- Department of Psychology, University of Gothenburg, Göteborg, Sweden;
| | - Oscar-Berman M
- Departments of Psychiatry and Anatomy & Neurobiology, Boston University School of Medicine and Boston VA Healthcare System, Boston, MA, USA
| | - Mona Li
- PATH Foundation NY, New York, NY, USA
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Blum K, Febo M, Fahlke C, Archer T, Berggren U, Demetrovics Z, Dushaj K, Badgaiyan RD. Hypothesizing Balancing Endorphinergic and Glutaminergic Systems to Treat and Prevent Relapse to Reward Deficiency Behaviors: Coupling D-Phenylalanine and N-Acetyl-L-Cysteine (NAC) as a Novel Therapeutic Modality. ACTA ACUST UNITED AC 2015; 2. [PMID: 26900600 PMCID: PMC4760695 DOI: 10.23937/2378-3656/1410076] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Kenneth Blum
- Department of Psychiatry, University of Florida College of Medicine, Gainesville, FL, USA; Division of Nutrigenomics, LaVita RDS, LLC, Draper, UT, USA; Division of Applied Clinical Research & Education, Dominion Diagnostics, LLC, North Kingstown, RI, USA; Division of Neuroscience-Based Therapy, Summit Estate Recovery Center, Los Gatos, CA, USA; Division of Clinical Neurology, PATH Foundation NY, New York, NY, USA; Departments of Psychiatry & Behavioral Sciences, Keck School of Medicine of USC, Los Angeles, CA, USA
| | - Marcelo Febo
- Department of Psychiatry, University of Florida College of Medicine, Gainesville, FL, USA
| | - Claudia Fahlke
- Department of Psychology, University of Gothenburg, Gothenburg, Sweden
| | - Trevor Archer
- Department of Psychology, University of Gothenburg, Gothenburg, Sweden
| | - U Berggren
- Department of Psychology, University of Gothenburg, Gothenburg, Sweden
| | - Zsolt Demetrovics
- Department of Clinical Psychology and Addiction, Eotvos Lorand University, Budapest, Hungary
| | - Kristina Dushaj
- Division of Clinical Neurology, PATH Foundation NY, New York, NY, USA
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7
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Blum K, Thanos PK, Oscar-Berman M, Febo M, Baron D, Badgaiyan RD, Gardner E, Demetrovics Z, Fahlke C, Haberstick BC, Dushaj K, Gold MS. Dopamine in the Brain: Hypothesizing Surfeit or Deficit Links to Reward and Addiction. ACTA ACUST UNITED AC 2015; 1:95-104. [PMID: 27398406 PMCID: PMC4936401 DOI: 10.17756/jrds.2015-016] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Recently there has been debate concerning the role of brain dopamine in reward and addiction. David Nutt and associates eloquently proposed that dopamine (DA) may be central to psycho stimulant dependence and some what important for alcohol, but not important for opiates, nicotine or even cannabis. Others have also argued that surfeit theories can explain for example cocaine seeking behavior as well as non-substance-related addictive behaviors. It seems prudent to distinguish between what constitutes “surfeit” compared to” deficit” in terms of short-term (acute) and long-term (chronic) brain reward circuitry responsivity. In an attempt to resolve controversy regarding the contributions of mesolimbic DA systems to reward, we review the three main competing explanatory categories: “liking”, “learning”, and “wanting”. They are (a) the hedonic impact -liking reward, (b) the ability to predict rewarding effects-learning and (c) the incentive salience of reward-related stimuli -wanting. In terms of acute effects, most of the evidence seems to favor the “surfeit theory”. Due to preferential dopamine release at mesolimbic-VTA-caudate-accumbens loci most drugs of abuse and Reward Deficiency Syndrome (RDS) behaviors have been linked to heightened feelings of well-being and hyperdopaminergic states.The “dopamine hypotheses” originally thought to be simple, is now believed to be quite complex and involves encoding the set point of hedonic tone, encoding attention, reward expectancy, and incentive motivation. Importantly, Willuhn et al. shows that in a self-administration paradigm, (chronic) excessive use of cocaine is caused by decreased phasic dopamine signaling in the striatum. In terms of chronic addictions, others have shown a blunted responsivity at brain reward sites with food, nicotine, and even gambling behavior. Finally, we are cognizant of the differences in dopaminergic function as addiction progresses and argue that relapse may be tied to dopamine deficiency. Vulnerability to addiction and relapse may be the result of the cumulative effects of dopaminergic and other neurotransmitter genetic variants and elevated stress levels. We therefore propose that dopamine homeostasis may be a preferred goal to combat relapse.
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Affiliation(s)
- Kenneth Blum
- Department of Psychiatry and McKnight Brain Institute, University of Florida, College of Medicine, Gainesville, FL, USA; Division of Nutrigenomics, La Vita RDS, Salt Lake City, UT, USA
| | - Peter K Thanos
- Research Institute on Addictions, University of Buffalo, State University of New York, Buffalo, NY, USA
| | - Marlene Oscar-Berman
- Departments of Psychiatry, Neurology, and Anatomy & Neurobiology, Boston University School of Medicine, and Boston VA Healthcare System, Boston, MA, USA
| | - Marcelo Febo
- Department of Psychiatry and McKnight Brain Institute, University of Florida, College of Medicine, Gainesville, FL, USA
| | - David Baron
- Departments of Psychiatry & Behavioral Sciences, Keck School of Medicine of USC, Los Angeles, CA, USA
| | - Rajendra D Badgaiyan
- Department of Psychiatry, University of Minnesota School of Medicine, Minneapolis, MN, USA
| | - Eliot Gardner
- Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, MD, USA
| | - Zsolt Demetrovics
- Eotvos Lorand University, Institute of Psychology, Department of Clinical Psychology and Addiction, Izabella utca 46., H-1064, Budapest, Hungary
| | - Claudia Fahlke
- Department of Psychology, University of Gothenburg, Sweden
| | - Brett C Haberstick
- Institute for Behavioral Genetics, University of Colorado Boulder, Boulder, CO, USA
| | - Kristina Dushaj
- Department of Neurological Research, Path Foundation NY, USA
| | - Mark S Gold
- Departments of Psychiatry, Neurology, and Anatomy & Neurobiology, Boston University School of Medicine, and Boston VA Healthcare System, Boston, MA, USA; Department of Psychiatry, Washington University School of Medicine. St. Louis, MO, USA
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Blum K, Febo M, Thanos PK, Baron D, Fratantonio J, Gold M. Clinically Combating Reward Deficiency Syndrome (RDS) with Dopamine Agonist Therapy as a Paradigm Shift: Dopamine for Dinner? Mol Neurobiol 2015; 52:1862-1869. [PMID: 25750061 PMCID: PMC4586005 DOI: 10.1007/s12035-015-9110-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 01/21/2015] [Indexed: 01/23/2023]
Abstract
Everyday, there are several millions of people that are increasingly unable to combat their frustrating and even fatal romance with getting high and/or experiencing “normal” feelings of well-being. In the USA, the FDA has approved pharmaceuticals for drug and alcohol abuse: tobacco and nicotine replacement therapy. The National Institute on Drug Abuse (NIDA) and the National Institute on Alcohol Abuse and Alcoholism (NIAAA) remarkably continue to provide an increasing understanding of the intricate functions of brain reward circuitry through sophisticated neuroimaging and molecular genetic applied technology. Similar work is intensely investigated on a worldwide basis with enhanced clarity and increased interaction between not only individual scientists but across many disciplines. However, while it is universally agreed that dopamine is a major neurotransmitter in terms of reward dependence, there remains controversy regarding how to modulate its role clinically to treat and prevent relapse for both substance and non-substance-related addictive behaviors. While the existing FDA-approved medications promote blocking dopamine, we argue that a more prudent paradigm shift should be biphasic—short-term blockade and long-term upregulation, enhancing functional connectivity of brain reward circuits.
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Affiliation(s)
- Kenneth Blum
- Department of Psychiatry and McKnight Brain Institute, College of Medicine, University of Florida, P. O. Box 100256, Gainesville, FL 32610-0256 USA
- Human Integrated Services Unit, Center for Clinical and Translational Science, Department of Psychiatry, College of Medicine, University of Vermont, Burlington, VT USA
- Division of Applied Clinical Research, Dominion Diagnostics, LLC, North Kingstown, RI USA
- Department of Addiction Research and Therapy, Malibu Beach Recovery Center, Malibu, CA USA
| | - Marcelo Febo
- Department of Psychiatry and McKnight Brain Institute, College of Medicine, University of Florida, P. O. Box 100256, Gainesville, FL 32610-0256 USA
| | - Panayotis K. Thanos
- Behavior Neuropharmacology and Neuroimaging Laboratory, Department of Psychology, SUNY at Stony Brook, Stony Brook, NY USA
| | - David Baron
- Department of Psychiatry, Keck School of Medicine, University of Southern California, Los Angeles, CA USA
- Keck School of Medicine, University of Southern California, Los Angeles, CA USA
| | - James Fratantonio
- Division of Applied Clinical Research, Dominion Diagnostics, LLC, North Kingstown, RI USA
| | - Mark Gold
- Department of Psychiatry and McKnight Brain Institute, College of Medicine, University of Florida, P. O. Box 100256, Gainesville, FL 32610-0256 USA
- Department of Research, Rivermernd Health, Atlanta, GA USA
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Banerjee N. Neurotransmitters in alcoholism: A review of neurobiological and genetic studies. INDIAN JOURNAL OF HUMAN GENETICS 2014; 20:20-31. [PMID: 24959010 PMCID: PMC4065474 DOI: 10.4103/0971-6866.132750] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recent advances in the study of alcoholism have thrown light on the involvement of various neurotransmitters in the phenomenon of alcohol addiction. Various neurotransmitters have been implicated in alcohol addiction due to their imbalance in the brain, which could be either due to their excess activity or inhibition. This review paper aims to consolidate and to summarize some of the recent papers which have been published in this regard. The review paper will give an overview of the neurobiology of alcohol addiction, followed by detailed reviews of some of the recent papers published in the context of the genetics of alcohol addiction. Furthermore, the author hopes that the present text will be found useful to novices and experts alike in the field of neurotransmitters in alcoholism.
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Affiliation(s)
- Niladri Banerjee
- Amity Institute of Biotechnology, Amity University, Noida, Uttar Pradesh, India
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Roman S, Zepeda-Carrillo EA, Moreno-Luna LE, Panduro A. Alcoholism and liver disease in Mexico: Genetic and environmental factors. World J Gastroenterol 2013; 19:7972-7982. [PMID: 24307790 PMCID: PMC3848144 DOI: 10.3748/wjg.v19.i44.7972] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2013] [Revised: 08/15/2013] [Accepted: 10/18/2013] [Indexed: 02/06/2023] Open
Abstract
Alcoholism and cirrhosis, which are two of the most serious health problems worldwide, have a broad spectrum of clinical outcomes. Both diseases are influenced by genetic susceptibility and cultural traits that differ globally but are specific for each population. In contrast to other regions around the world, Mexicans present the highest drinking score and a high mortality rate for alcoholic liver disease with an intermediate category level of per capita alcohol consumption. Mexico has a unique history of alcohol consumption that is linked to profound anthropological and social aspects. The Mexican population has an admixture genome inherited from different races, Caucasian, Amerindian and African, with a heterogeneous distribution within the country. Thus, genes related to alcohol addiction, such as dopamine receptor D2 in the brain, or liver alcohol-metabolizing enzymes, such as alcohol dehydrogenase class I polypeptide B, cytochrome P450 2E1 and aldehyde dehydrogenase class 2, may vary from one individual to another. Furthermore, they may be inherited as risk or non-risk haplogroups that confer susceptibility or resistance either to alcohol addiction or abusive alcohol consumption and possibly liver disease. Thus, in this era of genomics, personalized medicine will benefit patients if it is directed according to individual or population-based data. Additional association studies will be required to establish novel strategies for the prevention, care and treatment of liver disease in Mexico and worldwide.
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Mignini F, Napolioni V, Codazzo C, Carpi FM, Vitali M, Romeo M, Ceccanti M. DRD2/ANKK1 TaqIA and SLC6A3 VNTR polymorphisms in alcohol dependence: association and gene-gene interaction study in a population of Central Italy. Neurosci Lett 2012; 522:103-7. [PMID: 22698582 DOI: 10.1016/j.neulet.2012.06.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2012] [Revised: 05/23/2012] [Accepted: 06/04/2012] [Indexed: 12/27/2022]
Abstract
Dopamine is a neurotransmitter whose functions are mediated by five receptors expressed in several organs and tissues. Dopaminergic system dysfunctions are involved in the etiology or treatment of several pathological conditions, including drug addiction. Alcohol dependence (AD) is a widespread psychiatric disorder, affecting 5.4% of the general population lifetime. Family and twins studies support the role of a genetic component in AD. Since dopamine neurotransmission has been shown to be involved in drug reward, related genes are plausible candidates for susceptibility to AD. Here, we evaluated both the DRD2/ANKK1 TaqIA (rs1800497) and SLC6A3 40 bp-VNTR SNP and gene-gene interaction analysis in AD patients from a population of Central Italy. The study design was a case-control. In total, 280 alcoholic subjects (213 men and 67 woman) and 280 age- and sex-matched control subjects were recruited for this study. Case subjects met the DSM-IV criteria for AD and they are free from any psychiatric co-morbidities. Controls were subjects who had non-alcohol problem either never drank; those who have smoked at least one pack of cigarettes per day for at least 1 year were excluded. Genotyping was performed by allele-specific PCR and RFLP-PCR. SLC6A3 40 bp 3'UTR-VNTR displays no association with AD. DRD2/ANKK1 TaqIA genotype distribution is significantly associated to AD (O.R.=1.551, p=0.023), with A1* allele displaying an O.R.=1.403 (p=0.029). Gene-gene interaction analysis using three-way contingency table analysis by a log-linear model yielded no significant result. Our study in a population of Central Italy extends and confirms previous results and, for the first time, tested the gene-gene interaction between SLC6A3 and DRD2 in AD.
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Affiliation(s)
- Fiorenzo Mignini
- School of Pharmacy, Experimental Medicine Unit, University of Camerino, Italy.
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Dahlgren A, Wargelius HL, Berglund KJ, Fahlke C, Blennow K, Zetterberg H, Oreland L, Berggren U, Balldin J. Do alcohol-dependent individuals with DRD2 A1 allele have an increased risk of relapse? A pilot study. Alcohol Alcohol 2011; 46:509-13. [PMID: 21613303 DOI: 10.1093/alcalc/agr045] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
AIMS The TaqIA polymorphism of the dopamine D2 receptor (DRD2) gene has been extensively studied in relation to alcoholism, and the TaqI A1 allele appears to be over-represented in alcohol-dependent individuals. In a recent study, this allele has also been associated with a highly increased mortality rate in alcohol-dependent individuals. In the present study, we investigated whether the TaqI A1 allele of the DRD2 gene region was associated with a higher relapse rate in alcohol-dependent individuals. METHODS Adult women (n = 10) and men (n = 40) with a diagnosis of alcohol-dependence were recruited from two Swedish 12-step treatment units for alcoholism. Subjects were genotyped for the TaqIA polymorphism. On average, 1½ year after the end of the treatment program, subjects were re-interviewed by using the alcohol-related items from the Addiction Severity Index follow-up version. RESULTS Thirty-three (66%) subjects self-reported relapse and 17 (34%) abstinence during the follow-up period. Thirty-sex percent (18/50) were carriers of the A1 allele of the DRD2 gene region, and 64% (32/50) were non-carriers. Among the carriers of the A1 allele, 89% (16/18) reported relapse in contrast to 53% (17/32) in the non-carriers (P = 0.01; odds ratio = 7.1). CONCLUSION The present study is, to our knowledge, the first report of an association between the TaqI A1 allele and a substantially increased relapse rate. It should be emphasized that the number of subjects is relatively small, and this investigation should therefore be considered as a pilot study.
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Affiliation(s)
- Angelica Dahlgren
- Department of Psychology, University of Gothenburg, PO Box 500, SE-405 30 Göteborg, Sweden
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