1
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Blum K, Ashford JW, Kateb B, Sipple D, Braverman E, Dennen CA, Baron D, Badgaiyan R, Elman I, Cadet JL, Thanos PK, Hanna C, Bowirrat A, Modestino EJ, Yamamoto V, Gupta A, McLaughlin T, Makale M, Gold MS. Dopaminergic dysfunction: Role for genetic & epigenetic testing in the new psychiatry. J Neurol Sci 2023; 453:120809. [PMID: 37774561 DOI: 10.1016/j.jns.2023.120809] [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: 07/17/2021] [Revised: 08/02/2023] [Accepted: 09/11/2023] [Indexed: 10/01/2023]
Abstract
Reward Deficiency Syndrome (RDS), particularly linked to addictive disorders, costs billions of dollars globally and has resulted in over one million deaths in the United States (US). Illicit substance use has been steadily rising and in 2021 approximately 21.9% (61.2 million) of individuals living in the US aged 12 or older had used illicit drugs in the past year. However, only 1.5% (4.1 million) of these individuals had received any substance use treatment. This increase in use and failure to adequately treat or provide treatment to these individuals resulted in 106,699 overdose deaths in 2021 and increased in 2022. This article presents an alternative non-pharmaceutical treatment approach tied to gene-guided therapy, the subject of many decades of research. The cornerstone of this paradigm shift is the brain reward circuitry, brain stem physiology, and neurotransmitter deficits due to the effects of genetic and epigenetic insults on the interrelated cascade of neurotransmission and the net release of dopamine at the Ventral Tegmental Area -Nucleus Accumbens (VTA-NAc) reward site. The Genetic Addiction Risk Severity (GARS) test and pro-dopamine regulator nutraceutical KB220 were combined to induce "dopamine homeostasis" across the brain reward circuitry. This article aims to encourage four future actionable items: 1) the neurophysiologically accurate designation of, for example, "Hyperdopameism /Hyperdopameism" to replace the blaming nomenclature like alcoholism; 2) encouraging continued research into the nature of dysfunctional brainstem neurotransmitters across the brain reward circuitry; 3) early identification of people at risk for all RDS behaviors as a brain check (cognitive testing); 4) induction of dopamine homeostasis using "precision behavioral management" along with the coupling of GARS and precision Kb220 variants; 5) utilization of promising potential treatments include neuromodulating modalities such as Transmagnetic stimulation (TMS) and Deep Brain Stimulation(DBS), which target different areas of the neural circuitry involved in addiction and even neuroimmune agents like N-acetyl-cysteine.
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Affiliation(s)
- Kenneth Blum
- Division of Addiction Research & Education, Center for Exercise, Sports and Mental Health, Western University Health Sciences, Pomona, CA, USA; The Kenneth Blum Behavioral & Neurogenetic Institute, LLC., Austin, TX, USA; Department of Molecular Biology and Adelson School of Medicine, Ariel University, Ariel, Israel.
| | - J Wesson Ashford
- Department of Psychiatry and Behavioral Sciences, Stanford University, Palo Alto, CA, USA; War Related Illness & Injury Study Center, VA Palo Alto Health Care System, Palo Alto, CA, USA
| | - Babak Kateb
- Brain Mapping Foundation, Los Angeles, CA, USA; National Center for Nanobioelectronic, Los Angeles, CA, USA; Brain Technology and Innovation Park, Los Angeles, CA, USA
| | | | - Eric Braverman
- The Kenneth Blum Behavioral & Neurogenetic Institute, LLC., Austin, TX, USA
| | - Catherine A Dennen
- Department of Family Medicine, Jefferson Health Northeast, Philadelphia, PA, USA
| | - David Baron
- Division of Addiction Research & Education, Center for Exercise, Sports and Mental Health, Western University Health Sciences, Pomona, CA, USA
| | - Rajendra Badgaiyan
- Department of Psychiatry, South Texas Veteran Health Care System, Audie L. Murphy Memorial VA Hospital, San Antonio, TX, USA; Long School of Medicine, University of Texas Medical Center, San Antonio, TX, USA
| | - Igor Elman
- Center for Pain and the Brain (PAIN Group), Department of Anesthesiology, Critical Care & Pain Medicine, Boston Children's Hospital, Waltham, MA, USA; Cambridge Health Alliance, Harvard Medical School, Cambridge, MA, USA
| | - Jean Lud Cadet
- Molecular Neuropsychiatry Research Branch, NIH National Institute on Drug Abuse, Bethesda, MD, USA
| | - Panayotis K Thanos
- Department of Psychology & Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, University at Buffalo, Buffalo, NY, USA
| | - Colin Hanna
- Department of Psychology & Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions (BNNLA), Clinical Research Institute on Addictions, Department of Pharmacology and Toxicology, University at Buffalo, Buffalo, NY, USA
| | - Abdalla Bowirrat
- Department of Molecular Biology and Adelson School of Medicine, Ariel University, Ariel, Israel
| | | | - Vicky Yamamoto
- Brain Mapping Foundation, Los Angeles, CA, USA; National Center for Nanobioelectronic, Los Angeles, CA, USA; Brain Technology and Innovation Park, Los Angeles, CA, USA; Society for Brain Mapping and Therapeutics, Los Angeles, CA, USA; USC-Norris Comprehensive Cancer Center, Los Angeles, CA, USA
| | | | - Thomas McLaughlin
- Division of Reward Deficiency Research, Reward Deficiency Syndrome Clinics of America, Austin, TX, USA
| | - Mlan Makale
- Department of Radiation Medicine and Applied Sciences, University of California San Diego, La Jolla, CA, USA
| | - Mark S Gold
- Department of Psychiatry, Washington College of Medicine, St. Louis, MO, USA
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2
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Dopamine Receptor Expression and the Pathogenesis of Attention-Deficit Hyperactivity Disorder: a Scoping Review of the Literature. CURRENT DEVELOPMENTAL DISORDERS REPORTS 2022. [DOI: 10.1007/s40474-022-00253-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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3
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Investigating the Relationship Between Attention-Deficit Hyperactivity Disorder, Obligatory Exercise and Exercise Addiction. Int J Ment Health Addict 2021. [DOI: 10.1007/s11469-021-00662-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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4
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Kocyigit S, Guzel HS, Acikel B, Cetinkaya M. Comparison of Smartphone Addiction Level, Temperament and Character and Parental Attitudes of Adolescents with and without Attention Deficit Hyperactivity Disorder. Int J Ment Health Addict 2021. [DOI: 10.1007/s11469-021-00494-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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5
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Zhang JF, Wang XX, Feng Y, Fekete R, Jankovic J, Wu YC. Impulse Control Disorders in Parkinson's Disease: Epidemiology, Pathogenesis and Therapeutic Strategies. Front Psychiatry 2021; 12:635494. [PMID: 33633615 PMCID: PMC7900512 DOI: 10.3389/fpsyt.2021.635494] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 01/19/2021] [Indexed: 12/11/2022] Open
Abstract
Impulse control disorders (ICDs) in Parkinson's disease (PD) are aberrant behavior such as pathological gambling, hypersexuality, binge eating, and compulsive buying, which typically occur as a result of dopaminergic therapy. Numerous studies have focused on the broad spectrum of ICDs-related behaviors and their tremendous impact on patients and their family members. Recent advances have improved our understanding of ICDs. In this review, we discuss the epidemiology, pathogenesis and treatment of ICDs in the setting of PD.
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Affiliation(s)
- Jun-Fang Zhang
- Department of Neurology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xi-Xi Wang
- Department of Neurology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Shanghai General Hospital of Nanjing Medical University, Nanjing, China
| | - Ya Feng
- Department of Neurology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Robert Fekete
- Department of Neurology, New York Medical College, New York, NY, United States
| | - Joseph Jankovic
- Department of Neurology, Baylor College of Medicine, Houston, TX, United States
| | - Yun-Cheng Wu
- Department of Neurology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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6
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Exploring dopaminergic transmission in gambling addiction: A systematic translational review. Neurosci Biobehav Rev 2020; 119:481-511. [DOI: 10.1016/j.neubiorev.2020.09.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 08/16/2020] [Accepted: 09/26/2020] [Indexed: 12/15/2022]
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7
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Li L, Taylor MJ, Bälter K, Kuja‐Halkola R, Chen Q, Hegvik T, Tate AE, Chang Z, Arias‐Vásquez A, Hartman CA, Larsson H. Attention-deficit/hyperactivity disorder symptoms and dietary habits in adulthood: A large population-based twin study in Sweden. Am J Med Genet B Neuropsychiatr Genet 2020; 183:475-485. [PMID: 33029947 PMCID: PMC7702140 DOI: 10.1002/ajmg.b.32825] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 09/14/2020] [Accepted: 09/22/2020] [Indexed: 01/28/2023]
Abstract
Associations between adult attention-deficit/hyperactivity disorder (ADHD) symptoms and dietary habits have not been well established and the underlying mechanisms remain unclear. We explored these associations using a Swedish population-based twin study with 17,999 individuals aged 20-47 years. We estimated correlations between inattention and hyperactivity/impulsivity with dietary habits and fitted twin models to determine the genetic and environmental contributions. Dietary habits were defined as (a) consumption of food groups, (b) consumption of food items rich in particular macronutrients, and (c) healthy and unhealthy dietary patterns. At the phenotypic level, inattention was positively correlated with seafood, high-fat, high-sugar, high-protein food consumptions, and unhealthy dietary pattern, with correlation coefficients ranging from 0.03 (95%CI: 0.01, 0.05) to 0.13 (95% CI: 0.11, 0.15). Inattention was negatively correlated with fruits, vegetables consumptions and healthy dietary pattern, with correlation coefficients ranging from -0.06 (95%CI: -0.08, -0.04) to -0.07 (95%CI: -0.09, -0.05). Hyperactivity/impulsivity and dietary habits showed similar but weaker patterns compared to inattention. All associations remained stable across age, sex and socioeconomic status. Nonshared environmental effects contributed substantially to the correlations of inattention (56-60%) and hyperactivity/impulsivity (63-80%) with dietary habits. The highest and lowest genetic correlations were between inattention and high-sugar food (rA = .16, 95% CI: 0.07, 0.25), and between hyperactivity/impulsivity and unhealthy dietary pattern (rA = .05, 95% CI: -0.05, 0.14), respectively. We found phenotypic and etiological overlap between ADHD and dietary habits, although these associations were weak. Our findings contribute to a better understanding of common etiological pathways between ADHD symptoms and various dietary habits.
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Affiliation(s)
- Lin Li
- School of Medical SciencesÖrebro UniversityÖrebroSweden
| | - Mark J. Taylor
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
| | - Katarina Bälter
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden,Public Health SciencesMälardalen UniversityVästeråsSweden
| | - Ralf Kuja‐Halkola
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
| | - Qi Chen
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
| | - Tor‐Arne Hegvik
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden,Department of BiomedicineUniversity of BergenBergenNorway
| | - Ashley E. Tate
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
| | - Zheng Chang
- Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
| | - Alejandro Arias‐Vásquez
- The Department of Psychiatry & Human GeneticsDonders Institute for Brain, Cognition, and Behavior, Radboud University Medical CenterNijmegenNetherlands
| | - Catharina A. Hartman
- Department of PsychiatryUniversity of Groningen, University Medical Center GroningenGroningenNetherlands
| | - Henrik Larsson
- School of Medical SciencesÖrebro UniversityÖrebroSweden,Department of Medical Epidemiology and BiostatisticsKarolinska InstitutetStockholmSweden
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Piccardi ES, Johnson MH, Gliga T. Explaining individual differences in infant visual sensory seeking. INFANCY 2020; 25:677-698. [PMID: 32748567 PMCID: PMC7496506 DOI: 10.1111/infa.12356] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 12/05/2019] [Accepted: 06/15/2020] [Indexed: 12/21/2022]
Abstract
Individual differences in infants’ engagement with their environment manifest early in development and are noticed by parents. Three views have been advanced to explain differences in seeking novel stimulation. The optimal stimulation hypothesis suggests that individuals seek further stimulation when they are under‐responsive to current sensory input. The processing speed hypothesis proposes that those capable of processing information faster are driven to seek stimulation more frequently. The information prioritization hypothesis suggests the differences in stimulation seeking index variation in the prioritization of incoming relative to ongoing information processing. Ten‐month‐old infants saw 10 repetitions of a video clip and changes in frontal theta oscillatory amplitude were measured as an index of information processing speed. Stimulus‐locked P1 peak amplitude in response to checkerboards briefly overlaid on the video at random points during its presentation indexed processing of incoming stimulation. Parental report of higher visual seeking did not relate to reduced P1 peak amplitude or to a stronger decrease in frontal theta amplitude with repetition, thus not supporting either the optimal stimulation or the processing speed hypotheses. Higher visual seeking occurred in those infants whose P1 peak amplitude was greater than expected based on their theta amplitude. These findings indicate that visual sensory seeking in infancy is explained by a bias toward novel stimulation, thus supporting the information prioritization hypothesis.
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Affiliation(s)
- Elena Serena Piccardi
- Centre for Brain and Cognitive Development, Birkbeck University of London, London, UK
| | - Mark H Johnson
- Centre for Brain and Cognitive Development, Birkbeck University of London, London, UK.,Department of Psychology, Cambridge University, Cambridge, UK
| | - Teodora Gliga
- Centre for Brain and Cognitive Development, Birkbeck University of London, London, UK.,Department of Psychology, University of East Anglia, Norwich, UK
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9
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DRD4 48 bp multiallelic variants as age-population-specific biomarkers in attention-deficit/hyperactivity disorder. Transl Psychiatry 2020; 10:70. [PMID: 32075956 PMCID: PMC7031506 DOI: 10.1038/s41398-020-0755-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 12/10/2019] [Accepted: 12/20/2019] [Indexed: 01/09/2023] Open
Abstract
The identification of biomarkers to support the diagnosis and prediction of treatment response for attention-deficit/hyperactivity disorder (ADHD) is still a challenge. Our previous works highlighted the DRD4 (dopamine receptor D4) as the best potential genetic marker for childhood diagnosis and methylphenidate (MPH) response. Here, we aimed to provide additional evidence on biomarkers for ADHD diagnosis and treatment response, by using more specific approaches such as meta-analytic and bioinformatics tools. Via meta-analytic approaches including over 3000 cases and 16,000 controls, we demonstrated that, among the different variants studied in DRD4 gene, the 48-base pair, Variable Tandem Repeat Polymorphism, VNTR in exon 3 showed an age/population-specificity and an allelic heterogeneity. In particular, the 7R/"long" allele was identified as an ADHD risk factor in European-Caucasian populations (d = 1.31, 95%CI: 1.17-1.47, Z = 4.70/d = 1.36, 95%CI: 1.20-1.55, Z = 4.78, respectively), also, from the results of last meta-analysis, linked to the poor MPH efficacy. The 4R/"short" allele was a protective factor in European-Caucasian and South American populations (d = 0.83, 95%CI: 0.75-0.92, Z = 3.58), and was also associated to positive MPH response. These results refer to children with ADHD. No evidence of such associations was detected for adults with persistent ADHD (data from the last meta-analysis). Moreover, we found evidence that the 4R allele leads to higher receptor expression and increased sensitivity to dopamine, as compared with the 7R allele (d = 1.20, 95%CI: 0.71-1.69, Z = 4.81), and this is consistent with the ADHD protection/susceptibility effects of the respective alleles. Using bioinformatics tools, based on the latest genome-wide association (GWAS) meta-analysis of the Psychiatry Genomic Consortium (PGC), we demonstrated that the 48 bp VNTR is not in Linkage Disequilibrium with the DRD4 SNPs (Single Nucleotide Polymorphisms), which were not found to be associated with ADHD. Moreover, a DRD4 expression downregulation was found in ADHD specific brain regions (Putamen, Z score = -3.02, P = 0.00252). Overall, our results suggest that DRD4 48 bp VNTR variants should be considered as biomarkers to support the diagnosis of ADHD and to predict MPH response, although the accuracy of such a biomarker remains to be further elucidated.
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10
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Farruggia MC, Small DM. Effects of adiposity and metabolic dysfunction on cognition: A review. Physiol Behav 2019; 208:112578. [PMID: 31194997 PMCID: PMC6625347 DOI: 10.1016/j.physbeh.2019.112578] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 05/29/2019] [Accepted: 06/09/2019] [Indexed: 12/31/2022]
Abstract
Obesity and metabolic dysfunction are both correlated with increased rates of cognitive decline. However, because these two conditions often co-occur, it remains unclear whether their cognitive consequences are independent. In this review, we carefully consider literature examining the effects of metabolic dysfunction and increased adiposity on cognition across the lifespan, including only well-controlled studies that attempt to dissociate their effects. We found a total of 36 studies, 17 examining metabolic dysfunction and 19 examining the effects of adiposity. We found evidence from the literature suggesting that increased adiposity and metabolic dysfunction may contribute to deficits in executive function, memory, and medial temporal lobe structures largely independent of one another. These deficits are thought to arise principally from physiological changes associated with inflammation, vascularization, and oxidative stress, among others. Such processes may result from excess adipose tissue and insulin resistance that occur independently and can further exacerbate when the two conditions co-occur. However, we also find it likely that impaired cognition plays a role in behavioral and lifestyle choices that lead to increased adiposity and metabolic dysfunction, which can then perpetuate and augment cognitive decline. We recommend additional prospective and longitudinal studies to examine whether impaired cognition is a cause and/or consequence of these factors.
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Affiliation(s)
- Michael C Farruggia
- Interdepartmental Neuroscience Program, Yale University, 333 Cedar Street, New Haven, CT, USA; Department of Psychiatry, Yale University School of Medicine, 300 George Street, New Haven, CT 06511, USA.
| | - Dana M Small
- Interdepartmental Neuroscience Program, Yale University, 333 Cedar Street, New Haven, CT, USA; Department of Psychiatry, Yale University School of Medicine, 300 George Street, New Haven, CT 06511, USA; Department of Psychology, Yale University, New Haven, CT, USA; fMEG Center, University of Tubingen, Tubingen, Germany.
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11
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Carbonneau R, Vitaro F, Brendgen M, Tremblay RE. The Intergenerational Association Between Parents' Problem Gambling and Impulsivity-Hyperactivity/Inattention Behaviors in Children. JOURNAL OF ABNORMAL CHILD PSYCHOLOGY 2019; 46:1203-1215. [PMID: 29101590 DOI: 10.1007/s10802-017-0362-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Despite the well-established association between problem gambling and ADHD core categories of impulsivity-hyperactivity and inattention, the link between parents' problem gambling and impulsivity-hyperactivity/inattention (IH/I) behaviors in children has not been investigated. This study investigated the association between parents' problem gambling and children's IH/I behaviors while controlling for potential confounding variables. A population-based prospective cohort followed-up from kindergarten to age 30, the Quebec Longitudinal Study of Kindergarten Children (QLSKC), provided data over three generations. Among 1358 participants at age 30, parents with a child aged 1 year or older (N = 468; Mean age = 4.65 years; SD = 2.70) were selected. Generalized Linear Models included measures of grandparents' and parents' problem gambling, parents' IH/I behaviors in childhood, and a host of risk factors and comorbidities to predict IH/I in children. Intergenerational bivariate associations were observed between grandparents' problem gambling, parents' IH/I in childhood and problem gambling at age 30, and between parents' IH/I, problem gambling, and children's IH/I behaviors. Parents' problem gambling predicted children's IH/I behaviors above and beyond the effects of covariates such as family and socioeconomic characteristics, alcohol and drug use, depression symptoms and parents' gambling involvement. Parents' IH/I behaviors in childhood also predicted children's IH/I and had a moderating, enhancing effect on parents' problem gambling association with their offspring's IH/I behaviors. Problem gambling is a characteristic of parents' mental health that is distinctively associated with children's IH/I behaviors, above and beyond parents' own history of IH/I and of typically related addictive, psychopathological or socioeconomic risk factors and comorbidities.
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Affiliation(s)
- Rene Carbonneau
- Department of Pediatrics, University of Montreal, 3050 Edouard-Montpetit, suite 225, Montréal, QC, H3T1J7, Canada. .,Sainte-Justine Hospital Research Center, Montréal, QC, Canada. .,Research Unit on Children's Psychosocial Maladjustment, University of Montreal, Montréal, QC, Canada.
| | - Frank Vitaro
- Sainte-Justine Hospital Research Center, Montréal, QC, Canada.,Research Unit on Children's Psychosocial Maladjustment, University of Montreal, Montréal, QC, Canada.,School of Psychoeducation, University of Montreal, Montréal, QC, Canada
| | - Mara Brendgen
- Sainte-Justine Hospital Research Center, Montréal, QC, Canada.,Research Unit on Children's Psychosocial Maladjustment, University of Montreal, Montréal, QC, Canada.,Department of Psychology, University of Quebec in Montreal, Montréal, QC, Canada
| | - Richard E Tremblay
- Department of Pediatrics, University of Montreal, 3050 Edouard-Montpetit, suite 225, Montréal, QC, H3T1J7, Canada.,Sainte-Justine Hospital Research Center, Montréal, QC, Canada.,Research Unit on Children's Psychosocial Maladjustment, University of Montreal, Montréal, QC, Canada.,Department of Psychology, University of Montreal, Montréal, QC, Canada.,School of Public Health and Sport Sciences, University College Dublin, Dublin 4, Ireland
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12
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Blum K, Gondré-Lewis MC, Baron D, Thanos PK, Braverman ER, Neary J, Elman I, Badgaiyan RD. Introducing Precision Addiction Management of Reward Deficiency Syndrome, the Construct That Underpins All Addictive Behaviors. Front Psychiatry 2018; 9:548. [PMID: 30542299 PMCID: PMC6277779 DOI: 10.3389/fpsyt.2018.00548] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Accepted: 10/12/2018] [Indexed: 12/21/2022] Open
Affiliation(s)
- Kenneth Blum
- Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, CA, United States.,Department of Psychiatry, Boonshoft School of Medicine, Dayton VA Medical Center, Wright State University, Dayton, OH, United States.,University of Vermont College of Medicine, Burlington, VM, United States.,Division of Addictive Services, Dominion Diagnostics, LLC, North Kingston, RI, United States.,Division of Precision Addiction Management, Geneus Health, LLC, San Antonio, TX, United States.,Institute of Psychology, University of Eötvös Loránd, Budapest, Hungary.,Department of Clinical Neurology, Path Foundation, New York, NY, United States.,Division of Neuroscience and Addiction Therapy, Summit Estate Recovery Center, Los Gatos, CA, United States.,Department of Neurogenetics Research and Addiction Therapy, The Florida House Experience, Deerfield Beach, FL, United States.,National Human Genome Center, Howard University, Washington, DC, United States
| | - Marjorie C Gondré-Lewis
- Division of Precision Addiction Management, Geneus Health, LLC, San Antonio, TX, United States.,Department of Anatomy, Howard University College of Medicine, Washington, DC, United States.,Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Clinical and Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, United States
| | - David Baron
- Graduate College of Biomedical Sciences, Western University of Health Sciences, Pomona, CA, United States.,Division of Precision Addiction Management, Geneus Health, LLC, San Antonio, TX, United States
| | - Panayotis K Thanos
- Division of Precision Addiction Management, Geneus Health, LLC, San Antonio, TX, United States.,Behavioral Neuropharmacology and Neuroimaging Laboratory on Addictions, Clinical and Research Institute on Addictions, Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, United States.,Department of Psychology, University at Buffalo, Buffalo, NY, United States
| | - Eric R Braverman
- Department of Clinical Neurology, Path Foundation, New York, NY, United States
| | - Jennifer Neary
- Division of Precision Addiction Management, Geneus Health, LLC, San Antonio, TX, United States
| | - Igor Elman
- Division of Precision Addiction Management, Geneus Health, LLC, San Antonio, TX, United States.,Department of Psychiatry, Cooper Medical School of Rowan University, Camden, NJ, United States
| | - Rajendra D Badgaiyan
- Division of Precision Addiction Management, Geneus Health, LLC, San Antonio, TX, United States.,Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, United States
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Testing an Incentive-Sensitisation Approach to Understanding Problem Slot-Machine Gambling Using an Online Slot-Machine Simulation. J Gambl Stud 2017; 34:773-784. [DOI: 10.1007/s10899-017-9718-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Say YH. The association of insertions/deletions (INDELs) and variable number tandem repeats (VNTRs) with obesity and its related traits and complications. J Physiol Anthropol 2017; 36:25. [PMID: 28615046 PMCID: PMC5471687 DOI: 10.1186/s40101-017-0142-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 06/01/2017] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Despite the fact that insertions/deletions (INDELs) are the second most common type of genetic variations and variable number tandem repeats (VNTRs) represent a large portion of the human genome, they have received far less attention than single nucleotide polymorphisms (SNPs) and larger forms of structural variation like copy number variations (CNVs), especially in genome-wide association studies (GWAS) of complex diseases like polygenic obesity. This is exemplified by the vast amount of review papers on the role of SNPs and CNVs in obesity, its related traits (like anthropometric measurements, biochemical variables, and eating behavior), and its related complications (like hypertension, hypertriglyceridemia, hypercholesterolemia, and insulin resistance-collectively known as metabolic syndrome). Hence, this paper reviews the types of INDELs and VNTRs that have been studied for association with obesity and its related traits and complications. These INDELs and VNTRs could be found in the obesity loci or genes from the earliest GWAS and candidate gene association studies, like FTO, genes in the leptin-proopiomelanocortin pathway, and UCP2/3. Given the important role of the brain serotonergic and dopaminergic reward system in obesity susceptibility, the association of INDELs and VNTRs in these neurotransmitters' metabolism and transport genes with obesity is also reviewed. Next, the role of INS VNTR in obesity and its related traits is questionable, since recent large-scale studies failed to replicate the earlier positive associations. As obesity results in chronic low-grade inflammation of the adipose tissue, the proinflammatory cytokine gene IL1RA and anti-inflammatory cytokine gene IL4 have VNTRs that are implicated in obesity. A systemic proinflammatory state in combination with activation of the renin-angiotensin system and decreased nitric oxide bioavailability as found in obesity leads to endothelial dysfunction. This explains why VNTR and INDEL in eNOS and ACE, respectively, could be predisposing factors of obesity. Finally, two novel genes, DOCK5 and PER3, which are involved in the regulation of the Akt/MAPK pathway and circadian rhythm, respectively, have VNTRs and INDEL that might be associated with obesity. SHORT CONCLUSION In conclusion, INDELs and VNTRs could have important functional consequences in the pathophysiology of obesity, and research on them should be continued to facilitate obesity prediction, prevention, and treatment.
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Affiliation(s)
- Yee-How Say
- Department of Biomedical Science, Faculty of Science, Universiti Tunku Abdul Rahman (UTAR) Kampar Campus, Jalan Universiti, Bandar Barat, 31900, Kampar, Perak, Malaysia.
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15
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Dalley JW, Robbins TW. Fractionating impulsivity: neuropsychiatric implications. Nat Rev Neurosci 2017; 18:158-171. [PMID: 28209979 DOI: 10.1038/nrn.2017.8] [Citation(s) in RCA: 369] [Impact Index Per Article: 52.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The ability to make decisions and act quickly without hesitation can be advantageous in many settings. However, when persistently expressed, impulsive decisions and actions are considered risky, maladaptive and symptomatic of such diverse brain disorders as attention-deficit hyperactivity disorder, drug addiction and affective disorders. Over the past decade, rapid progress has been made in the identification of discrete neural networks that underlie different forms of impulsivity - from impaired response inhibition and risky decision making to a profound intolerance of delayed rewards. Herein, we review what is currently known about the neural and psychological mechanisms of impulsivity, and discuss the relevance and application of these new insights to various neuropsychiatric disorders.
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Affiliation(s)
- Jeffrey W Dalley
- Department of Psychology, University of Cambridge, Cambridge CB2 3EB, UK.,Department of Psychiatry, University of Cambridge, Cambridge CB2 2QQ, UK.,Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge CB2 3EB, UK
| | - Trevor W Robbins
- Department of Psychology, University of Cambridge, Cambridge CB2 3EB, UK.,Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge CB2 3EB, UK
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16
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Nautiyal KM, Okuda M, Hen R, Blanco C. Gambling disorder: an integrative review of animal and human studies. Ann N Y Acad Sci 2017; 1394:106-127. [PMID: 28486792 PMCID: PMC5466885 DOI: 10.1111/nyas.13356] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 03/08/2017] [Accepted: 03/22/2017] [Indexed: 11/29/2022]
Abstract
Gambling disorder (GD), previously called pathological gambling and classified as an impulse control disorder in DSM-III and DSM-IV, has recently been reclassified as an addictive disorder in the DSM-5. It is widely recognized as an important public health problem associated with substantial personal and social costs, high rates of psychiatric comorbidity, poor physical health, and elevated suicide rates. A number of risk factors have been identified, including some genetic polymorphisms. Animal models have been developed in order to study the underlying neural basis of GD. Here, we discuss recent advances in our understanding of the risk factors, disease course, and pathophysiology. A focus on a phenotype-based dissection of the disorder is included in which known neural correlates from animal and human studies are reviewed. Finally, current treatment approaches are discussed, as well as future directions for GD research.
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Affiliation(s)
- Katherine M. Nautiyal
- New York State Psychiatric Institute, New York, New York
- Department of Psychiatry, Columbia University, New York, New York
| | - Mayumi Okuda
- New York State Psychiatric Institute, New York, New York
- Department of Psychiatry, Columbia University, New York, New York
| | - Rene Hen
- New York State Psychiatric Institute, New York, New York
- Department of Psychiatry, Columbia University, New York, New York
- Departments of Neuroscience and Pharmacology, Columbia University, New York, New York
| | - Carlos Blanco
- National Institute on Drug Abuse, Rockville, Maryland
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17
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Ledonne A, Mercuri NB. Current Concepts on the Physiopathological Relevance of Dopaminergic Receptors. Front Cell Neurosci 2017; 11:27. [PMID: 28228718 PMCID: PMC5296367 DOI: 10.3389/fncel.2017.00027] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 01/30/2017] [Indexed: 12/21/2022] Open
Abstract
Dopamine (DA) is a key neurotransmitter modulating essential functions of the central nervous system (CNS), like voluntary movement, reward, several cognitive functions and goal-oriented behaviors. The factual relevance of DAergic transmission can be well appreciated by considering that its dysfunction is recognized as a core alteration in several devastating neurological and psychiatric disorders, including Parkinson’s disease (PD) and associated movement disorders, as well as, schizophrenia, bipolar disorder, attention deficit hyperactivity disorder (ADHD) and addiction. Here we present an overview of the current knowledge on the involvement of DAergic receptors in the regulation of key physiological brain activities, and the consequences of their dysfunctions in brain disorders such as PD, schizophrenia and addiction.
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Affiliation(s)
- Ada Ledonne
- Department of Experimental Neuroscience, Santa Lucia Foundation Rome, Italy
| | - Nicola B Mercuri
- Department of Experimental Neuroscience, Santa Lucia FoundationRome, Italy; Department of Systems Medicine, University of Rome "Tor Vergata"Rome, Italy
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18
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Zhang Y, Sun Y, Liang J, Lu L, Shi J. Similarities and Differences in Genetics. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 1010:59-71. [DOI: 10.1007/978-981-10-5562-1_4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
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19
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Nohesara S, Ghadirivasfi M, Barati M, Ghasemzadeh MR, Narimani S, Mousavi-Behbahani Z, Joghataei M, Soleimani M, Taban M, Mehrabi S, Thiagalingam S, Abdolmaleky HM. Methamphetamine-induced psychosis is associated with DNA hypomethylation and increased expression of AKT1 and key dopaminergic genes. Am J Med Genet B Neuropsychiatr Genet 2016; 171:1180-1189. [PMID: 27753212 PMCID: PMC7115129 DOI: 10.1002/ajmg.b.32506] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 10/03/2016] [Indexed: 12/31/2022]
Abstract
Methamphetamine, one of the most frequently used illicit drugs worldwide, can induce psychosis in a large fraction of abusers and it is becoming a major problem for the health care institutions. There is some evidence that genetic and epigenetic factors may play roles in methamphetamine psychosis. In this study, we examined methamphetamine-induced epigenetic and expression changes of several key genes involved in psychosis. RNA and DNA extracted from the saliva samples of patients with methamphetamine dependency with and without psychosis as well as control subjects (each group 25) were analyzed for expression and promoter DNA methylation status of DRD1, DRD2, DRD3, DRD4, MB-COMT, GAD1, and AKT1 using qRT-PCR and q-MSP, respectively. We found statistically significant DNA hypomethylation of the promoter regions of DRD3 (P = 0.032), DRD4 (P = 0.05), MB-COMT (P = 0.009), and AKT1 (P = 0.0008) associated with increased expression of the corresponding genes in patients with methamphetamine psychosis (P = 0.022, P = 0.034, P = 0.035, P = 0.038, respectively), and to a lesser degree in some of the candidate genes in non-psychotic patients versus the control subjects. In general, methamphetamine dependency is associated with reduced DNA methylation and corresponding increase in expression of several key genes involved in the pathogenesis of psychotic disorders. While these epigenetic changes can be useful diagnostic biomarkers for psychosis in methamphetamine abusers, it is also consistent with the use of methyl rich diet for prevention or suppression of psychosis in these patients. However, this needs to be confirmed in future studies. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Shabnam Nohesara
- Mental Health Research Center and Department of Psychiatry, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Ghadirivasfi
- Mental Health Research Center and Department of Psychiatry, Iran University of Medical Sciences, Tehran, Iran
| | - Mahmood Barati
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad-Reza Ghasemzadeh
- Mental Health Research Center and Department of Psychiatry, Iran University of Medical Sciences, Tehran, Iran
| | - Samira Narimani
- Mental Health Research Center and Department of Psychiatry, Iran University of Medical Sciences, Tehran, Iran
| | - Zohreh Mousavi-Behbahani
- Mental Health Research Center and Department of Psychiatry, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammadtaghi Joghataei
- Faculty of Medicine, Department of Anatomy and Neuroscience, Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mansoureh Soleimani
- Faculty of Medicine, Department of Anatomy and Neuroscience, Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mozhgan Taban
- Mental Health Research Center and Department of Psychiatry, Iran University of Medical Sciences, Tehran, Iran
| | - Soraya Mehrabi
- Department of Neuroscience, School of Advanced Medical Technologies, Tehran University of Medical Sciences, Tehran, Iran
| | - Sam Thiagalingam
- Department of Medicine (Biomedical Genetics), Boston University School of Medicine, Boston, Massachusetts,Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Boston, Massachusetts,Correspondence to: Sam Thiagalingam and Hamid Mostafavi Abdolmaleky, Department of Medicine (Biomedical Genetics), Boston University School of Medicine, Boston, MA 02118., (S.T.); (H.M.A.)
| | - Hamid Mostafavi Abdolmaleky
- Department of Medicine (Biomedical Genetics), Boston University School of Medicine, Boston, Massachusetts,Correspondence to: Sam Thiagalingam and Hamid Mostafavi Abdolmaleky, Department of Medicine (Biomedical Genetics), Boston University School of Medicine, Boston, MA 02118., (S.T.); (H.M.A.)
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20
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Qin L, Liu W, Ma K, Wei J, Zhong P, Cho K, Yan Z. The ADHD-linked human dopamine D4 receptor variant D4.7 induces over-suppression of NMDA receptor function in prefrontal cortex. Neurobiol Dis 2016; 95:194-203. [PMID: 27475724 PMCID: PMC5391260 DOI: 10.1016/j.nbd.2016.07.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 06/16/2016] [Accepted: 07/25/2016] [Indexed: 12/15/2022] Open
Abstract
The human dopamine D4 receptor (hD4R) variants with long tandem repeats in the third intracellular loop have been strongly associated with attention deficit hyperactivity disorder (ADHD) and risk taking behaviors. To understand the potential molecular mechanism underlying the connection, we have investigated the synaptic function of human D4R polymorphism by virally expressing the ADHD-linked 7-repeat allele, hD4.7, or its normal counterpart, hD4.4, in the prefrontal cortex (PFC) of D4R knockout mice. We found that hD4R bound to the SH3 domain of PSD-95 in a state-dependent manner. Activation of hD4.7 caused more reduction of NR1/PSD-95 binding and NR1 surface expression than hD4.4 in PFC slices. Moreover, the NMDAR-mediated excitatory postsynaptic currents (NMDAR-EPSC) in PFC pyramidal neurons were suppressed to a larger extent by hD4.7 than hD4.4 activation. Direct stimulation of NMDARs with the partial agonist d-cycloserine prevented the NMDAR hypofunction induced by hD4.7 activation. Moreover, hD4.7-expressing mice exhibited the increased exploratory and novelty seeking behaviors, mimicking the phenotypic hallmark of human ADHD. d-cycloserine administration ameliorated the ADHD-like behaviors in hD4.7-expressing mice. Our results suggest that over-suppression of NMDAR function may underlie the role of hD4.7 in ADHD, and enhancing NMDAR signaling may be a viable therapeutic strategy to ADHD humans carrying the D4.7 allele.
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Affiliation(s)
- Luye Qin
- Dept. of Physiology & Biophysics, State University of New York at Buffalo, School of Medicine and Biomedical Sciences, Buffalo, NY 14214, USA
| | - Wenhua Liu
- Dept. of Physiology & Biophysics, State University of New York at Buffalo, School of Medicine and Biomedical Sciences, Buffalo, NY 14214, USA; School of Life Science, Zhaoqing University, Zhaoqing 526061, China
| | - Kaijie Ma
- Dept. of Physiology & Biophysics, State University of New York at Buffalo, School of Medicine and Biomedical Sciences, Buffalo, NY 14214, USA
| | - Jing Wei
- Dept. of Physiology & Biophysics, State University of New York at Buffalo, School of Medicine and Biomedical Sciences, Buffalo, NY 14214, USA
| | - Ping Zhong
- Dept. of Physiology & Biophysics, State University of New York at Buffalo, School of Medicine and Biomedical Sciences, Buffalo, NY 14214, USA
| | - Kei Cho
- The MRC Centre for Synaptic Plasticity, University of Bristol Whitson, Bristol, UK
| | - Zhen Yan
- Dept. of Physiology & Biophysics, State University of New York at Buffalo, School of Medicine and Biomedical Sciences, Buffalo, NY 14214, USA.
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21
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Heiden P, Heinz A, Romanczuk-Seiferth N. Pathological gambling in Parkinson's disease: what are the risk factors and what is the role of impulsivity? Eur J Neurosci 2016; 45:67-72. [PMID: 27623191 PMCID: PMC5215459 DOI: 10.1111/ejn.13396] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Revised: 08/24/2016] [Accepted: 09/07/2016] [Indexed: 02/06/2023]
Abstract
The incidence of pathological gambling in Parkinson's patients is significantly greater than in the general population. A correlation has been observed between dopamine agonist medication and the development of pathological gambling. However, scientists conjecture that the affected patients have underlying risk factors. Studies analysing Parkinson's patients have detected that patients who developed pathological gambling are younger, score higher on novelty‐seeking tests, are more impulsive and are more likely to have a personal or family history of alcohol addiction. In addition, some genetic variations have been associated with the susceptibility of developing pathological gambling, which include mutations of DRD3, 5‐HTTLPR and GRIN2B. Studies focusing on neurofunctional discrepancies between Parkinson's patients with and without pathological gambling have found increased functional activation and dopamine release in regions associated with the mesolimbic reward system. Furthermore, there is also evidence showing increased processing of reward and decreased activation elicited by punishment, suggesting altered learning processes. Furthermore, the role of deep brain stimulation of the nucleus subthalamicus (STN DBS) is controversial. In most Parkinson's patients, pathological gambling resolved after the initiation of the STN DBS, which might be explained by discontinuation or decrease in dopamine agonist medication. However, it has been also shown that some patients are more impulsive while the STN DBS is activated. These differences may depend on the DBS localization in the more limbic or motor part of the STN and their regulative effects on impulsivity. Further research is needed to clarify susceptibility factors for the development of pathological gambling in Parkinson's patients.
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Affiliation(s)
- Petra Heiden
- Department of Psychiatry and Psychotherapy, Charité - Universitätsmedizin Berlin, Charité Campus Mitte, Charitéplatz 1, 10117, Berlin, Germany
| | - Andreas Heinz
- Department of Psychiatry and Psychotherapy, Charité - Universitätsmedizin Berlin, Charité Campus Mitte, Charitéplatz 1, 10117, Berlin, Germany
| | - Nina Romanczuk-Seiferth
- Department of Psychiatry and Psychotherapy, Charité - Universitätsmedizin Berlin, Charité Campus Mitte, Charitéplatz 1, 10117, Berlin, Germany
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22
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King AP, Muzik M, Hamilton L, Taylor AB, Rosenblum KL, Liberzon I. Dopamine Receptor Gene DRD4 7-Repeat Allele X Maternal Sensitivity Interaction on Child Externalizing Behavior Problems: Independent Replication of Effects at 18 Months. PLoS One 2016; 11:e0160473. [PMID: 27494520 PMCID: PMC4975398 DOI: 10.1371/journal.pone.0160473] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 07/19/2016] [Indexed: 11/18/2022] Open
Abstract
The DRD4 VNTR has been associated with child behavior problems in interaction with maternal insensitivity in European and American cohorts of preschoolers, with the 7-repeat (7R) allele associated with greater problems. We sought to replicate and expand these findings by examining effects on reports of child behavior problems at 18 months. A 63 family sample with data for observed maternal sensitivity ratings, DRD4 VNTR genotype, and maternal report of child behavior problems at 18-months was used in this preliminary analysis. Maternal sensitivity was measured at 6-months of age using laboratory observational measures (free-play and a teaching task). Maternal report of toddler behavior was obtained at 18-months via the standard Child Behavior Checklist, and infant genotype on the DRD4 VNTR was obtained using PCR. Infants carrying the DRD4 7R allele showed greater effects of maternal insensitivity than non-carriers for behavioral problems at 18-months. We replicated previous findings of association of infant DRD4 x maternal sensitivity interactions with child Externalizing problems in the European-ancestry sample (N = 42) in a median split of maternal sensitivity (p = .00011, eta2 = .329) and in regression analyses controlling for maternal age, maternal depression, and child gender in European ancestry (B = -3.4, SE 1.33, p = .01) and the total sample (B = -2.2, SE 1.02, p = .02). Exploratory analyses also found evidence of DRD4 x maternal sensitivity interaction with the CBCL ADHD scale. These findings replicate in an independent cohort DRD4 x maternal insensitivity interaction effect on child externalizing behavior problems at 18 months, further supporting the role of the DRD4 genotype in differential sensitivity to parenting.
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Affiliation(s)
- Anthony P. King
- Psychiatry, University of Michigan, Ann Arbor, Michigan, United States of America
- VA Ann Arbor Health System, Ann Arbor, Michigan, United States of America
| | - Maria Muzik
- Psychiatry, University of Michigan, Ann Arbor, Michigan, United States of America
- Center for Human Growth & Development, Ann Arbor, Michigan, United States of America
- * E-mail:
| | - Lindsay Hamilton
- Psychology, Bowling Green State University, Bowling Green, Ohio, United States of America
| | - Alexander B. Taylor
- Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Katherine L. Rosenblum
- Psychiatry, University of Michigan, Ann Arbor, Michigan, United States of America
- Center for Human Growth & Development, Ann Arbor, Michigan, United States of America
| | - Israel Liberzon
- Psychiatry, University of Michigan, Ann Arbor, Michigan, United States of America
- VA Ann Arbor Health System, Ann Arbor, Michigan, United States of America
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23
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Karaca S, Saleh A, Canan F, Potenza MN. Comorbidity between Behavioral Addictions and Attention Deficit/Hyperactivity Disorder: a Systematic Review. Int J Ment Health Addict 2016. [DOI: 10.1007/s11469-016-9660-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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24
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Cocker PJ, Vonder Haar C, Winstanley CA. Elucidating the role of D4 receptors in mediating attributions of salience to incentive stimuli on Pavlovian conditioned approach and conditioned reinforcement paradigms. Behav Brain Res 2016; 312:55-63. [PMID: 27275521 DOI: 10.1016/j.bbr.2016.06.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 06/03/2016] [Accepted: 06/04/2016] [Indexed: 12/17/2022]
Abstract
The power of drug-associated cues to instigate drug 'wanting' and consequently promote drug seeking is a corner stone of contemporary theories of addiction. Gambling disorder has recently been added to the pantheon of addictive disorders due to the phenomenological similarities between the diseases. However, the neurobiological mechanism that may mediate increased sensitivity towards conditioned stimuli in addictive disorders is unclear. We have previously demonstrated using a rodent analogue of a simple slot machine that the dopamine D4 receptor is critically engaged in controlling animals' attribution of salience to stimuli associated with reward in this paradigm, and consequently may represent a target for the treatment of gambling disorder. Here, we investigated the role of acute administration of a D4 receptor agonist on animals' responsivity to conditioned stimuli on both a Pavlovian conditioned approach (autoshaping) and a conditioned reinforcement paradigm. Following training on one of the two tasks, separate cohorts of rats (male and female) were administered a dose of PD168077 shown to be maximally effective at precipitating errors in reward expectancy on the rat slot machine task (10mg/kg). However, augmenting the activity of the D4 receptors in this manner did not alter behaviour on either task. These data therefore provide novel evidence that the D4 receptor does not alter incentive motivation in response to cues on simple behavioural tasks.
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Affiliation(s)
- P J Cocker
- Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, Canada.
| | - C Vonder Haar
- Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, Canada
| | - C A Winstanley
- Department of Psychology, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, Canada.
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25
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Cocker P, Hosking J, Murch W, Clark L, Winstanley C. Activation of dopamine D4 receptors within the anterior cingulate cortex enhances the erroneous expectation of reward on a rat slot machine task. Neuropharmacology 2016; 105:186-195. [DOI: 10.1016/j.neuropharm.2016.01.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 01/12/2016] [Accepted: 01/13/2016] [Indexed: 11/28/2022]
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26
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27
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Pappa I, Mileva-Seitz VR, Bakermans-Kranenburg MJ, Tiemeier H, van IJzendoorn MH. The magnificent seven: A quantitative review of dopamine receptor d4 and its association with child behavior. Neurosci Biobehav Rev 2015; 57:175-86. [DOI: 10.1016/j.neubiorev.2015.08.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 07/16/2015] [Accepted: 08/16/2015] [Indexed: 11/25/2022]
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28
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Lobo DSS, Aleksandrova L, Knight J, Casey DM, el-Guebaly N, Nobrega JN, Kennedy JL. Addiction-related genes in gambling disorders: new insights from parallel human and pre-clinical models. Mol Psychiatry 2015; 20:1002-10. [PMID: 25266122 DOI: 10.1038/mp.2014.113] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 07/30/2014] [Accepted: 08/04/2014] [Indexed: 11/09/2022]
Abstract
Neurobiological research supports the characterization of disordered gambling (DG) as a behavioral addiction. Recently, an animal model of gambling behavior was developed (rat gambling task, rGT), expanding the available tools to investigate DG neurobiology. We investigated whether rGT performance and associated risk gene expression in the rat's brain could provide cross-translational understanding of the neuromolecular mechanisms of addiction in DG. We genotyped tagSNPs (single-nucleotide polymorphisms) in 38 addiction-related genes in 400 DG and 345 non-DG subjects. Genes with P<0.1 in the human association analyses were selected to be investigated in the animal arm to determine whether their mRNA expression in rats was associated with the rat's performance on the rGT. In humans, DG was significantly associated with tagSNPs in DRD3 (rs167771) and CAMK2D (rs3815072). Our results suggest that age and gender might moderate the association between CAMK2D and DG. Moderation effects could not be investigated due to sample power. In the animal arm, only the association between rGT performance and Drd3 expression remained significant after Bonferroni correction for 59 brain regions. As male rats were used, gender effects could not be investigated. Our results corroborate previous findings reporting the involvement of DRD3 receptor in addictions. To our knowledge, the use of human genetics, pre-clinical models and gene expression as a cross-translation paradigm has not previously been attempted in the field of addictions. The cross-validation of human findings in animal models is crucial for improving the translation of basic research into clinical treatments, which could accelerate neurobiological and pharmacological investigations in addictions.
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Affiliation(s)
- D S S Lobo
- 1] Department of Psychiatry, University of Toronto, Centre for Addiction and Mental Health, Toronto, ON, Canada [2] Centre for Addiction and Mental Health, Toronto, ON, Canada
| | - L Aleksandrova
- 1] Centre for Addiction and Mental Health, Toronto, ON, Canada [2] Department of Pharmacology and Toxicology, University of Toronto, Toronto, ON, Canada
| | - J Knight
- 1] Department of Psychiatry, University of Toronto, Centre for Addiction and Mental Health, Toronto, ON, Canada [2] Centre for Addiction and Mental Health, Toronto, ON, Canada
| | - D M Casey
- Mental Health Commission of Canada, Calgary, AB, Canada
| | - N el-Guebaly
- Division of Addiction, Department of Psychiatry, University of Calgary, Calgary, AB, Canada
| | - J N Nobrega
- 1] Centre for Addiction and Mental Health, Toronto, ON, Canada [2] Departments of Pharmacology and Toxicology, Psychiatry, and Psychology, University of Toronto, Toronto, ON, Canada
| | - J L Kennedy
- 1] Department of Psychiatry, University of Toronto, Centre for Addiction and Mental Health, Toronto, ON, Canada [2] Centre for Addiction and Mental Health, Toronto, ON, Canada
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29
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Takeuchi H, Tomita H, Taki Y, Kikuchi Y, Ono C, Yu Z, Sekiguchi A, Nouchi R, Kotozaki Y, Nakagawa S, Miyauchi CM, Iizuka K, Yokoyama R, Shinada T, Yamamoto Y, Hanawa S, Araki T, Hashizume H, Kunitoki K, Sassa Y, Kawashima R. Cognitive and neural correlates of the 5-repeat allele of the dopamine D4 receptor gene in a population lacking the 7-repeat allele. Neuroimage 2015; 110:124-35. [PMID: 25659462 DOI: 10.1016/j.neuroimage.2015.01.053] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Revised: 12/10/2014] [Accepted: 01/28/2015] [Indexed: 01/05/2023] Open
Abstract
The 5-repeat allele of a common length polymorphism in the gene that encodes the dopamine D4 receptor (DRD4) is robustly associated with the risk of attention deficit hyperactivity disorder (ADHD) and substantially exists in Asian populations, which have a lower ADHD prevalence. In this study, we investigated the effect of this allele on microstructural properties of the brain and on its functional activity during externally directed attention-demanding tasks and creative performance in the 765 Asian subjects. For this purpose, we employed diffusion tensor imaging, N-back functional magnetic resonance imaging paradigms, and a test to measure creativity by divergent thinking. The 5-repeat allele was significantly associated with increased originality in the creative performance, increased mean diffusivity (the measure of how the tissue includes water molecules instead of neural and vessel components) in the widespread gray and white matter areas of extensive areas, particularly those where DRD4 is expressed, and reduced task-induced deactivation in the areas that are deactivated during the tasks in the course of both the attention-demanding working memory task and simple sensorimotor task. The observed neural characteristics of 5-repeat allele carriers may lead to an increased risk of ADHD and behavioral deficits. Furthermore, the increased originality of creative thinking observed in the 5-repeat allele carriers may support the notion of the side of adaptivity of the widespread risk allele of psychiatric diseases.
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Affiliation(s)
- Hikaru Takeuchi
- Division of Developmental Cognitive Neuroscience, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan.
| | - Hiroaki Tomita
- Department of Disaster Psychiatry, International Research Institute of Disaster Science, Tohoku University, Sendai, Japan
| | - Yasuyuki Taki
- Division of Developmental Cognitive Neuroscience, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan; Division of Medical Neuroimage Analysis, Department of Community Medical Supports, Tohoku Medical Megabank Organization, Tohoku University, Japan; Department of Nuclear Medicine and Radiology, Institute of Development, Aging and Cancer, Tohoku University, Japan
| | - Yoshie Kikuchi
- Department of Disaster Psychiatry, International Research Institute of Disaster Science, Tohoku University, Sendai, Japan
| | - Chiaki Ono
- Department of Disaster Psychiatry, International Research Institute of Disaster Science, Tohoku University, Sendai, Japan
| | - Zhiqian Yu
- Department of Disaster Psychiatry, International Research Institute of Disaster Science, Tohoku University, Sendai, Japan
| | - Atsushi Sekiguchi
- Division of Medical Neuroimage Analysis, Department of Community Medical Supports, Tohoku Medical Megabank Organization, Tohoku University, Japan; Department of Functional Brain Imaging, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Rui Nouchi
- Human and Social Response Research Division, International Research Institute of Disaster Science, Tohoku University, Sendai, Japan
| | - Yuka Kotozaki
- Smart Ageing International Research Center, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Seishu Nakagawa
- Department of Functional Brain Imaging, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Carlos Makoto Miyauchi
- Graduate School of Arts and Sciences, Department of General Systems Studies, The University of Tokyo, Tokyo, Japan
| | - Kunio Iizuka
- Department of Functional Brain Imaging, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan; Department of Psychiatry, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Ryoichi Yokoyama
- Department of Functional Brain Imaging, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan; Japan Society for the Promotion of Science, Tokyo, Japan
| | - Takamitsu Shinada
- Department of Functional Brain Imaging, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Yuki Yamamoto
- Department of Functional Brain Imaging, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Sugiko Hanawa
- Department of Functional Brain Imaging, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Tsuyoshi Araki
- Smart Ageing International Research Center, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Hiroshi Hashizume
- Division of Developmental Cognitive Neuroscience, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | | | - Yuko Sassa
- Division of Developmental Cognitive Neuroscience, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Ryuta Kawashima
- Division of Developmental Cognitive Neuroscience, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan; Smart Ageing International Research Center, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan; Department of Functional Brain Imaging, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
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de Graaff LCG, Clark AJL, Tauber M, Ranke MB, Johnston LB, Caliebe J, Molinas C, Amin N, van Duijn C, Wollmann H, Wallaschofski H, Savage MO, Hokken-Koelega ACS. Association analysis of ten candidate genes in a large multinational cohort of small for gestational age children and children with idiopathic short stature (NESTEGG study). Horm Res Paediatr 2014; 80:466-76. [PMID: 24280783 DOI: 10.1159/000355409] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2013] [Accepted: 07/24/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Fetal growth failure has been associated with an increased risk of hypertension, cardiovascular disease and diabetes in adulthood. Exploring the mechanisms underlying this association should improve our understanding of these common adult diseases. PATIENTS AND METHODS We investigated 225 SNPs in 10 genes involved in growth and glucose metabolism (GH1, GHR, IGF1, IGF1R, STAT5A, STAT5B, MAPK1, MAPK3, PPARγ and INS) in 1,437 children from the multinational NESTEGG consortium: 345 patients born small for gestational age who remained short (SGA-S), 288 who showed catch-up growth (SGA-Cu), 410 idiopathic short stature (ISS) and 394 controls. We related genotype to pre- and/or postnatal growth parameters, response to growth hormone (if applicable) and blood pressure. RESULTS We found several clinical associations for GH1, GHR, IGF1, IGF1R, PPARγ and MAPK1. One SNP remained significant after Bonferroni's correction: IGF1R SNP rs4966035's minor allele A was significantly more prevalent among SGA and associated with smaller birth length (p = 0.000378) and birth weight (weaker association), independent of gestational age. CONCLUSION IGF1R SNP rs4966035 is significantly associated with birth length, independent of gestational age. This and other associations suggest that polymorphisms in these genes might partly explain the phenotype of short children born SGA and children with ISS.
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Affiliation(s)
- L C G de Graaff
- Division of Endocrinology, Department of Paediatrics, Erasmus MC-Sophia Children's Hospital, Erasmus MC, Rotterdam, The Netherlands
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Liu S, Cui J, Zhang X, Wu W, Niu H, Ma X, Xu H, Yi M. Variable number tandem repeats in dopamine receptor D4 in Tourette's syndrome. Mov Disord 2014; 29:1687-91. [PMID: 25258183 DOI: 10.1002/mds.26027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 08/01/2014] [Accepted: 08/25/2014] [Indexed: 11/09/2022] Open
Affiliation(s)
- Shiguo Liu
- Genetic Laboratory; The Affiliated Hospital of Qingdao University; Qingdao 266003 China
- Prenatal Diagnosis Center; The Affiliated Hospital of Qingdao University; Qingdao 266003 China
| | - Jiajia Cui
- Department of Psychiatry, Medical College; Qingdao University; Qingdao 266021 China
| | - Xinhua Zhang
- Department of Psychiatry, Medical College; Qingdao University; Qingdao 266021 China
- Psychological Clinic; The Affiliated Hospital of Qingdao University; Qingdao 266003 China
| | - Weifeng Wu
- Department of Psychiatry, Medical College; Qingdao University; Qingdao 266021 China
| | - Haitao Niu
- The Affiliated Hospital of Qingdao University; Qingdao 266003 China
| | - Xu Ma
- National Research Institute for Family Planning; Beijing 100081 China
- World Health Organization Collaborating Centre for Research in Human Reproduction; Beijing China
| | - Hongmei Xu
- The Affiliated Hospital of Qingdao University; Qingdao 266003 China
| | - Mingji Yi
- Child Healthcare Department; The Affiliated Hospital of Qingdao University; Qingdao 266003 China
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A selective role for dopamine D₄ receptors in modulating reward expectancy in a rodent slot machine task. Biol Psychiatry 2014; 75:817-24. [PMID: 24094512 DOI: 10.1016/j.biopsych.2013.08.026] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 07/15/2013] [Accepted: 08/01/2013] [Indexed: 12/12/2022]
Abstract
BACKGROUND Cognitive distortions regarding gambling outcomes confer vulnerability to pathological gambling. Using a rat slot machine task (rSMT), we previously demonstrated that the nonspecific D₂ agonist quinpirole enhances erroneous expectations of reward on near-miss trials, suggesting a pivotal role for the D₂ receptor family in mediating the near-miss effect. Identifying which receptor subtype is involved could facilitate treatment development for compulsive slot machine play. METHODS Thirty-two male Long Evans rats learned the rSMT. Three flashing lights could be set to on or off. A win was signaled if all three lights were set to on, whereas any other light pattern indicated a loss. Rats then chose between responding on the collect lever, which delivered 10 sugar pellets on win trials but a 10-second time penalty on loss trials, or to start a new trial instead. Performance was assessed following systemic administration of selective D₂, D₃, and D₄ receptor ligands. RESULTS The selective D₂ antagonist L-741,626, the D₃ antagonist SB-277011-A, and the D₃ agonist PD128,907 had no effect. In contrast, the selective D₄ agonist PD168077 partially mimicked quinpirole's effects, increasing erroneous collect responses on nonwin trials, whereas the D₄ antagonist L-745,870 improved the error rate. L-745,870 was also the only antagonist that could attenuate the deleterious effects of quinpirole. CONCLUSIONS The dopamine D₄ receptor is critically involved in signaling reward expectancy in the rSMT. The ability of L-745,870 to reduce the classification of losses as wins suggests that D₄ antagonists could be effective in treating problematic slot machine play.
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Impulse control disorders in Parkinson's disease: an overview from neurobiology to treatment. J Neurol 2014; 262:7-20. [PMID: 24824224 DOI: 10.1007/s00415-014-7361-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2014] [Revised: 04/17/2014] [Accepted: 04/18/2014] [Indexed: 01/25/2023]
Abstract
Parkinson's disease (PD) is the second most common neurodegenerative brain disorder and is characterized by motor symptoms such as tremor, bradykinesia, rigidity and postural instability. A majority of the patients also develop non-motor symptoms. Impulse control disorders (ICD) are behavioural changes that often fail to be detected in clinical practice. The prevalence of ICD in PD varies widely from 6.1 to 31.2 % and treatment with dopaminergic medication is considered to be the greatest risk factor. Management consists mainly of reducing dopaminergic medication. In our experience, ICD has a tremendous impact on the quality of life of the patients and their families and should therefore not be disregarded. Studies addressing the role of ICD in PD caregiver strain are imperative. We attempt to give a comprehensive overview of the literature on the complicated neurobiology of ICD and discuss risk factors, genetic susceptibility, screening modalities and management.
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Michealraj KA, Jatana N, Jafurulla, Narayanan L, Chattopadhyay A, Thelma BK. Functional characterization of rare variants in human dopamine receptor D4 gene by genotype-phenotype correlations. Neuroscience 2014; 262:176-89. [PMID: 24406443 DOI: 10.1016/j.neuroscience.2013.12.059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 11/28/2013] [Accepted: 12/20/2013] [Indexed: 01/11/2023]
Abstract
Next generation sequencing technologies have facilitated a notable shift from common disease common variant hypothesis to common disease rare variant, as also witnessed in recent literature on schizophrenia. Dopamine receptor D4 (DRD4), a G-protein-coupled receptor is associated with psychiatric disorders and has high affinity for atypical antipsychotic clozapine. We investigated the functional role of rare genetic variants in DRD4 which may have implications for translational medicine. CHO-K1 cells independently expressing four rare non-synonymous variants of DRD4 namely R237L, A281P, S284G located in the third cytosolic loop and V194G, located in the fifth transmembrane domain were generated. Their genotype-phenotype correlations were evaluated using [³H]spiperone binding, G-protein activation and molecular dynamics-simulation studies. A281P and S284G were functionally similar to wildtype (WT). With R237L, potency of dopamine and quinpirole reduced ∼sixfold and threefold respectively compared to WT; [³H]spiperone binding studies showed a reduction in total number of binding sites (∼40%) but not binding affinity, in silico docking studies revealed that binding of both dopamine and spiperone to R237L was structurally similar to WT. Of note, V194G variant failed to inhibit forskolin-stimulated adenylate cyclase activity and phosphorylate extracellular signal-regulated kinase; showed significant reduction in binding affinity (K(d)=2.16 nM) and total number of binding sites (∼66%) compared to WT in [³H]spiperone binding studies; and ligand docking studies showed that binding of dopamine and spiperone is superficial due to probable structural alteration. Transmembrane variant V194G in DRD4.4 results in functional alteration warranting continuing functional analysis of rare variants.
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Affiliation(s)
- K A Michealraj
- Department of Genetics, University of Delhi South Campus, New Delhi, India
| | - N Jatana
- Bioinformatics Infrastructure Facility, Sri Venkateswara College, New Delhi, India
| | - Jafurulla
- Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research, Uppal Road, Hyderabad 500007, India
| | - L Narayanan
- Bioinformatics Infrastructure Facility, Sri Venkateswara College, New Delhi, India
| | - A Chattopadhyay
- Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research, Uppal Road, Hyderabad 500007, India
| | - B K Thelma
- Department of Genetics, University of Delhi South Campus, New Delhi, India.
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Thompson MD, Cole DEC, Capra V, Siminovitch KA, Rovati GE, Burnham WM, Rana BK. Pharmacogenetics of the G protein-coupled receptors. Methods Mol Biol 2014; 1175:189-242. [PMID: 25150871 DOI: 10.1007/978-1-4939-0956-8_9] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Pharmacogenetics investigates the influence of genetic variants on physiological phenotypes related to drug response and disease, while pharmacogenomics takes a genome-wide approach to advancing this knowledge. Both play an important role in identifying responders and nonresponders to medication, avoiding adverse drug reactions, and optimizing drug dose for the individual. G protein-coupled receptors (GPCRs) are the primary target of therapeutic drugs and have been the focus of these studies. With the advance of genomic technologies, there has been a substantial increase in the inventory of naturally occurring rare and common GPCR variants. These variants include single-nucleotide polymorphisms and insertion or deletions that have potential to alter GPCR expression of function. In vivo and in vitro studies have determined functional roles for many GPCR variants, but genetic association studies that define the physiological impact of the majority of these common variants are still limited. Despite the breadth of pharmacogenetic data available, GPCR variants have not been included in drug labeling and are only occasionally considered in optimizing clinical use of GPCR-targeted agents. In this chapter, pharmacogenetic and genomic studies on GPCR variants are reviewed with respect to a subset of GPCR systems, including the adrenergic, calcium sensing, cysteinyl leukotriene, cannabinoid CB1 and CB2 receptors, and the de-orphanized receptors such as GPR55. The nature of the disruption to receptor function is discussed with respect to regulation of gene expression, expression on the cell surface (affected by receptor trafficking, dimerization, desensitization/downregulation), or perturbation of receptor function (altered ligand binding, G protein coupling, constitutive activity). The large body of experimental data generated on structure and function relationships and receptor-ligand interactions are being harnessed for the in silico functional prediction of naturally occurring GPCR variants. We provide information on online resources dedicated to GPCRs and present applications of publically available computational tools for pharmacogenetic studies of GPCRs. As the breadth of GPCR pharmacogenomic data becomes clearer, the opportunity for routine assessment of GPCR variants to predict disease risk, drug response, and potential adverse drug effects will become possible.
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Affiliation(s)
- Miles D Thompson
- Department of Pharmacology and Toxicology, Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, ON, Canada, M5S 1A8,
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Paschou P. The genetic basis of Gilles de la Tourette Syndrome. Neurosci Biobehav Rev 2013; 37:1026-39. [DOI: 10.1016/j.neubiorev.2013.01.016] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Revised: 01/02/2013] [Accepted: 01/07/2013] [Indexed: 12/18/2022]
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Santangelo G, Barone P, Trojano L, Vitale C. Pathological gambling in Parkinson's disease. A comprehensive review. Parkinsonism Relat Disord 2013; 19:645-53. [DOI: 10.1016/j.parkreldis.2013.02.007] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2012] [Revised: 02/07/2013] [Accepted: 02/14/2013] [Indexed: 11/16/2022]
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Leeman RF, Potenza MN. A targeted review of the neurobiology and genetics of behavioural addictions: an emerging area of research. CANADIAN JOURNAL OF PSYCHIATRY. REVUE CANADIENNE DE PSYCHIATRIE 2013; 58:260-73. [PMID: 23756286 PMCID: PMC3762982 DOI: 10.1177/070674371305800503] [Citation(s) in RCA: 158] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This review summarizes neurobiological and genetic findings in behavioural addictions, draws parallels with findings pertaining to substance use disorders, and offers suggestions for future research. Articles concerning brain function, neurotransmitter activity, and family history and (or) genetic findings for behavioural addictions involving gambling, Internet use, video game playing, shopping, kleptomania, and sexual activity were reviewed. Behavioural addictions involve dysfunction in several brain regions, particularly the frontal cortex and striatum. Findings from imaging studies incorporating cognitive tasks have arguably been more consistent than cue-induction studies. Early results suggest white and grey matter differences. Neurochemical findings suggest roles for dopaminergic and serotonergic systems, but results from clinical trials seem more equivocal. While limited, family history and genetic data support heritability for pathological gambling and that people with behavioural addictions are more likely to have a close family member with some form of psychopathology. Parallels exist between neurobiological and genetic and family history findings in substance and nonsubstance addictions, suggesting that compulsive engagement in these behaviours may constitute addictions. To date, findings are limited, particularly for shopping, kleptomania, and sexual behaviour. Genetic understandings are at an early stage. Future research directions are offered.
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MESH Headings
- Behavior, Addictive/classification
- Behavior, Addictive/genetics
- Behavior, Addictive/metabolism
- Behavior, Addictive/physiopathology
- Behavioral Research/methods
- Brain/metabolism
- Brain/physiopathology
- Disruptive, Impulse Control, and Conduct Disorders/classification
- Disruptive, Impulse Control, and Conduct Disorders/diagnosis
- Disruptive, Impulse Control, and Conduct Disorders/genetics
- Disruptive, Impulse Control, and Conduct Disorders/metabolism
- Disruptive, Impulse Control, and Conduct Disorders/psychology
- Functional Neuroimaging/methods
- Genetic Predisposition to Disease
- Genetics, Behavioral/methods
- Humans
- Neurobiology/methods
- Neuropsychology/methods
- Neurotransmitter Agents/classification
- Neurotransmitter Agents/metabolism
- Substance-Related Disorders/metabolism
- Substance-Related Disorders/physiopathology
- Substance-Related Disorders/psychology
- Synaptic Transmission/physiology
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Affiliation(s)
- Robert F Leeman
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA.
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El-Mallakh RS, McKenzie C. The dopamine D4/D2 receptor antagonist affinity ratio as a predictor of anti-aggression medication efficacy. Med Hypotheses 2013; 80:530-3. [DOI: 10.1016/j.mehy.2012.10.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 09/16/2012] [Accepted: 10/18/2012] [Indexed: 01/04/2023]
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SARASWATHY KALLURNAVA, MEITEI SANJENBAMYAIPHABA, SINGH HUIDROMSURAJ, JOSEPH ANTONETATERESA, MONDAL PRAKASHRANJAN, MURRY BENRITHUNG, SACHDEVA MOHINDERPAL, GHOSH PRADEEPKUMAR. Dopaminergic D4 receptor polymorphism among 24 populations of India: an anthropological insight. ANTHROPOL SCI 2013. [DOI: 10.1537/ase.130609] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- KALLUR NAVA SARASWATHY
- Molecular Anthropology Laboratory, Department of Anthropology, University of Delhi, Delhi
| | | | - HUIDROM SURAJ SINGH
- Molecular Anthropology Laboratory, Department of Anthropology, University of Delhi, Delhi
| | | | - PRAKASH RANJAN MONDAL
- Molecular Anthropology Laboratory, Department of Anthropology, University of Delhi, Delhi
| | - BENRITHUNG MURRY
- Molecular Anthropology Laboratory, Department of Anthropology, University of Delhi, Delhi
| | - MOHINDER PAL SACHDEVA
- Molecular Anthropology Laboratory, Department of Anthropology, University of Delhi, Delhi
| | - PRADEEP KUMAR GHOSH
- Molecular Anthropology Laboratory, Department of Anthropology, University of Delhi, Delhi
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Adriani W, Koot S, Columba-Cabezas S, Romano E, Travaglini D, van den Bos R, Granstrem O, Ali SF, Laviola G. Immunization with DAT fragments is associated with long-term striatal impairment, hyperactivity and reduced cognitive flexibility in mice. Behav Brain Funct 2012. [PMID: 23192105 PMCID: PMC3537576 DOI: 10.1186/1744-9081-8-54] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Background Possible interactions between nervous and immune systems in neuro-psychiatric disorders remain elusive. Levels of brain dopamine transporter (DAT) have been implicated in several impulse-control disorders, like attention deficit / hyperactivity disorder (ADHD) and obsessive-compulsive disorder (OCD). Here, we assessed the interplay between DAT auto-immunity and behavioural / neurochemical phenotype. Methods Male CD-1 mice were immunized with DAT peptide fragments (DAT-i), or vehicle alone (VEH), to generate elevated circulating levels of DAT auto-antibodies (aAbs). Using an operant delay-of-reward task (20 min daily sessions; timeout 25 sec), mice had a choice between either an immediate small amount of food (SS), or a larger amount of food after a delay (LL), which increased progressively across sessions (from 0 to 150 sec). Results DAT-i mice exhibited spontaneous hyperactivity (2 h-longer wake-up peak; a wake-up attempt during rest). Two sub-populations differing in behavioural flexibility were identified in the VEH control group: they showed either a clear-cut decision to select LL or clear-cut shifting towards SS, as expected. Compared to VEH controls, choice-behaviour profile of DAT-i mice was markedly disturbed, together with long-lasting alterations of the striatal monoamines. Enhanced levels of DA metabolite HVA in DAT-i mice came along with slower acquisition of basal preferences and with impaired shifting; elevation also in DOPAC levels was associated with incapacity to change a rigid selection strategy. This scarce flexibility of performance is indicative of a poor adaptation to task contingencies. Conclusions Hyperactivity and reduced cognitive flexibility are patterns of behaviour consistent with enduring functional impairment of striatal regions. It is yet unclear how anti-DAT antibodies could enter or otherwise affect these brain areas, and which alterations in DAT activity exactly occurred after immunization. Present neuro-behavioural alterations, coming along with an experimentally-induced rise of circulating DAT-directed aAbs, open the issue of a potential role for auto-immunity in vulnerability to impulse-control disorders.
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Affiliation(s)
- Walter Adriani
- Dept. Cell Biology & Neurosciences, Istituto Superiore di Sanità, Rome, Italy.
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Association study on pathological gambling and polymorphisms of dopamine D1, D2, D3, and D4 receptor genes in a Korean population. J Gambl Stud 2012; 28:481-91. [PMID: 21853233 DOI: 10.1007/s10899-011-9261-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Several studies have reported that some dopaminergic receptor polymorphisms are associated with pathological gambling (PG). Considering that there are major race and ethnic group difference in dopaminergic polymorphisms, the result of genetic association studies should be confirmed in more homogeneous population to avoid problems of population stratification. The present study aimed to investigate whether selected polymorphisms in the dopamine receptors genes (DRD1, DRD2, DRD3, and DRD4) are associated with PG in Korean population which is consisted of only Korean ancestry. Subjects were 104 men with a diagnosis of PG and 114 unrelated age-matched normal control men. Genotyping was performed for the DRD1 gene -48 A/G, DRD2 gene TaqI A, DRD3 gene Ser9Gly, and DRD4 gene exon III variable number tandem repeat polymorphisms. The method of multifactor dimensionality reduction (MDR) was used to analyze gene-gene interactions. There were no differences in the frequencies of any studied polymorphisms between patients with PG and normal controls. MDR analysis did not show a significant effect of the 4 dopamine receptor gene polymorphisms on susceptibility to PG (P > 0.05). The present study suggests that the analyzed polymorphisms of the dopamine receptor genes might not be associated with PG in a Korean population.
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Gonon F, Konsman JP, Cohen D, Boraud T. Why most biomedical findings echoed by newspapers turn out to be false: the case of attention deficit hyperactivity disorder. PLoS One 2012; 7:e44275. [PMID: 22984483 PMCID: PMC3440402 DOI: 10.1371/journal.pone.0044275] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 07/30/2012] [Indexed: 01/23/2023] Open
Abstract
Context Because positive biomedical observations are more often published than those reporting no effect, initial observations are often refuted or attenuated by subsequent studies. Objective To determine whether newspapers preferentially report on initial findings and whether they also report on subsequent studies. Methods We focused on attention deficit hyperactivity disorder (ADHD). Using Factiva and PubMed databases, we identified 47 scientific publications on ADHD published in the 1990s and soon echoed by 347 newspapers articles. We selected the ten most echoed publications and collected all their relevant subsequent studies until 2011. We checked whether findings reported in each “top 10” publication were consistent with previous and subsequent observations. We also compared the newspaper coverage of the “top 10” publications to that of their related scientific studies. Results Seven of the “top 10” publications were initial studies and the conclusions in six of them were either refuted or strongly attenuated subsequently. The seventh was not confirmed or refuted, but its main conclusion appears unlikely. Among the three “top 10” that were not initial studies, two were confirmed subsequently and the third was attenuated. The newspaper coverage of the “top 10” publications (223 articles) was much larger than that of the 67 related studies (57 articles). Moreover, only one of the latter newspaper articles reported that the corresponding “top 10” finding had been attenuated. The average impact factor of the scientific journals publishing studies echoed by newspapers (17.1 n = 56) was higher (p<0.0001) than that corresponding to related publications that were not echoed (6.4 n = 56). Conclusion Because newspapers preferentially echo initial ADHD findings appearing in prominent journals, they report on uncertain findings that are often refuted or attenuated by subsequent studies. If this media reporting bias generalizes to health sciences, it represents a major cause of distortion in health science communication.
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Affiliation(s)
- François Gonon
- Institute of Neurodegenerative Diseases, University of Bordeaux, Bordeaux, France.
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47
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Dopamine genes (DRD2/ANKK1-TaqA1 and DRD4-7R) and executive function: their interaction with obesity. PLoS One 2012; 7:e41482. [PMID: 22848508 PMCID: PMC3405092 DOI: 10.1371/journal.pone.0041482] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Accepted: 06/21/2012] [Indexed: 11/19/2022] Open
Abstract
Obesity is a multifactorial disease caused by the interaction between genotype and environment, and it is considered to be a type of addictive alteration. The A1 allele of the DRD2/ANKK1-TaqIA gene has been associated with addictive disorders, with obesity and with the performance in executive functions. The 7 repeat allele of the DRD4 gene has likewise been associated with the performance in executive functions, as well as with addictive behaviors and impulsivity. Participants were included in the obesity group (N = 42) if their body mass index (BMI) was equal to or above 30, and in the lean group (N = 42) if their BMI was below 25. The DRD2/ANKK1-TaqIA and DRD4 VNTR polymorphisms were obtained. All subjects underwent neuropsychological assessment. Eating behavior traits were evaluated. The 'DRD2/ANKK1-TaqIA A1-allele status' had a significant effect on almost all the executive variables, but no significant 'DRD4 7R-allele status' effects were observed for any of the executive variables analyzed. There was a significant 'group' x 'DRD2/ANKK1-TaqIA A1-allele status' interaction effect on LN and 'group' x 'DRD4 7R-allele status' interaction effect on TMT B-A score. Being obese and a carrier of the A1 allele of DRD2/ANKK1-TaqIA or the 7R allele of DRD4 VNTR polymorphisms could confer a weakness as regards the performance of executive functions.
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48
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Wu J, Xiao H, Sun H, Zou L, Zhu LQ. Role of dopamine receptors in ADHD: a systematic meta-analysis. Mol Neurobiol 2012; 45:605-20. [PMID: 22610946 DOI: 10.1007/s12035-012-8278-5] [Citation(s) in RCA: 178] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2012] [Accepted: 05/07/2012] [Indexed: 01/11/2023]
Abstract
The dopaminergic system plays a pivotal role in the central nervous system via its five diverse receptors (D1-D5). Dysfunction of dopaminergic system is implicated in many neuropsychological diseases, including attention deficit hyperactivity disorder (ADHD), a common mental disorder that prevalent in childhood. Understanding the relationship of five different dopamine (DA) receptors with ADHD will help us to elucidate different roles of these receptors and to develop therapeutic approaches of ADHD. This review summarized the ongoing research of DA receptor genes in ADHD pathogenesis and gathered the past published data with meta-analysis and revealed the high risk of DRD5, DRD2, and DRD4 polymorphisms in ADHD.
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Affiliation(s)
- Jing Wu
- Department of Epidemiology and Biostatistics and Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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49
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Kousha M, Shahrivar Z, Alaghband-Rad J. Substance use disorder and ADHD: is ADHD a particularly "specific" risk factor? J Atten Disord 2012; 16:325-32. [PMID: 22127397 DOI: 10.1177/1087054710387265] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To assess the pattern of substance use disorder (SUD) in adolescents with and without history of attention - deficit / hyperactivity disorder (ADHD) using an Iranian sample in the context of a cultural background and drug availability is differing from Western countries. METHOD In this case- control study, the participants were interviewed by a child psychiatrist and the measures included: kiddie Schedule for Affective Disorder and Schizophrenia for school age children (K-SADS), Opium Treatment Index (OTI) and Global Assessment Functioning (GAF). Data were analyzed with chi square test and T test and fisher exact test by EPI.6 soft ware. RESULTS Adolescents with ADHD were younger at the time of starting cigarette smoking, substance use, abuse and dependency (p = 0.0001), a shorter period between their first-time substance use and substance dependence or abuse (p = 0.0001), more severe substance use (for cannabis, heroine, cigarette and drugs such as benzodiazepines p < 0.05) and more functional impairment (p = 0.0007). Average number of co morbid disorders were higher in ADHD group. (p = 0.03) CONCLUSION Although the pattern and type of substance use may be different in Iranian culture, our findings about the relationship between ADHD and SUD are similar to other western and non western countries. The presence of ADHD may over-ride cultural barriers and lower availability of drugs to the development of SUD in Iranian adolescents. Early diagnosis and treatment of ADHD may propose with better prognosis of SUD and subsequent decrease in the prevalence of SUD and the costs of SUD-related pathology in this population.
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50
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Conversano C, Marazziti D, Carmassi C, Baldini S, Barnabei G, Dell'Osso L. Pathological gambling: a systematic review of biochemical, neuroimaging, and neuropsychological findings. Harv Rev Psychiatry 2012; 20:130-48. [PMID: 22716504 DOI: 10.3109/10673229.2012.694318] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Pathological gambling is an emerging psychiatric disorder that has recently gained much attention because of its increasing prevalence and devastating personal, familial, and social consequences. Although its pathophysiology is largely unknown, the shared similarities with both addiction and obsessive-compulsive spectrum disorders have suggested the possibility of common psychobiological substrates. As with many other psychiatric disorders, it is believed that pathological gambling may result from the interplay between individual vulnerability and environmental factors. The aim of this article is to offer a comprehensive review of the main neurobiological aspects of pathological gambling, with particular attention to neuropsychological and related findings. A deeper understanding of the biological correlates of pathological gambling is required in order to develop effective treatment strategies.
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Affiliation(s)
- Ciro Conversano
- Dipartimento di Psichiatria, Neurobiologia, Farmacologia e Biotecnologie-University of Pisa, Italy
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