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Acosta-López JE, Suárez I, Pineda DA, Cervantes-Henríquez ML, Martínez-Banfi ML, Lozano-Gutiérrez SG, Ahmad M, Pineda-Alhucema W, Noguera-Machacón LM, Hoz MDL, Mejía-Segura E, Jiménez-Figueroa G, Sánchez-Rojas M, Mastronardi CA, Arcos-Burgos M, Vélez JI, Puentes-Rozo PJ. Impulsive and Omission Errors: Potential Temporal Processing Endophenotypes in ADHD. Brain Sci 2021; 11:1218. [PMID: 34573239 PMCID: PMC8467181 DOI: 10.3390/brainsci11091218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/01/2021] [Accepted: 09/02/2021] [Indexed: 11/19/2022] Open
Abstract
Temporal processing (TP) is associated with functions such as perception, verbal skills, temporal perspective, and future planning, and is intercorrelated with working memory, attention, and inhibitory control, which are highly impaired in individuals with attention deficit hyperactivity disorder (ADHD). Here we evaluate TP measures as potential endophenotypes in Caribbean families ascertained from probands affected by ADHD. A total of 232 individuals were recruited and clinically evaluated using an extensive battery of neuropsychological tasks and reaction time (RT)-based task paradigms. Further, the heritability (genetic variance underpinning phenotype) was estimated as a measure of the genetics apportionment. A predictive framework for ADHD diagnosis was derived using these tasks. We found that individuals with ADHD differed from controls in neuropsychological tasks assessing mental control, visual-verbal memory, verbal fluency, verbal, and semantic fluency. In addition, TP measures such as RT, errors, and variability were also affected in individuals with ADHD. Moreover, we determined that only omission and commission errors had significant heritability. In conclusion, we have disentangled omission and commission errors as possible TP endophenotypes in ADHD, which can be suitable to assess the neurobiological and genetic basis of ADHD. A predictive model using these endophenotypes led to remarkable sensitivity, specificity, precision and classification rate for ADHD diagnosis, and may be a useful tool for patients' diagnosis, follow-up, and longitudinal assessment in the clinical setting.
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Affiliation(s)
- Johan E. Acosta-López
- Facultad de Ciencias Jurídicas y Sociales, Universidad Simón Bolívar, Barranquilla 080005, Colombia; (M.L.C.-H.); (M.L.M.-B.); (S.G.L.-G.); (M.A.); (W.P.-A.); (L.M.N.-M.); (M.D.L.H.); (E.M.-S.); (G.J.-F.); (M.S.-R.); (P.J.P.-R.)
| | - Isabel Suárez
- Universidad del Norte, Barranquilla 081007, Colombia;
| | - David A. Pineda
- Neuropsychology and Conduct Research Group, University of San Buenaventura, Medellín 050010, Colombia;
| | - Martha L. Cervantes-Henríquez
- Facultad de Ciencias Jurídicas y Sociales, Universidad Simón Bolívar, Barranquilla 080005, Colombia; (M.L.C.-H.); (M.L.M.-B.); (S.G.L.-G.); (M.A.); (W.P.-A.); (L.M.N.-M.); (M.D.L.H.); (E.M.-S.); (G.J.-F.); (M.S.-R.); (P.J.P.-R.)
- Universidad del Norte, Barranquilla 081007, Colombia;
| | - Martha L. Martínez-Banfi
- Facultad de Ciencias Jurídicas y Sociales, Universidad Simón Bolívar, Barranquilla 080005, Colombia; (M.L.C.-H.); (M.L.M.-B.); (S.G.L.-G.); (M.A.); (W.P.-A.); (L.M.N.-M.); (M.D.L.H.); (E.M.-S.); (G.J.-F.); (M.S.-R.); (P.J.P.-R.)
| | - Semiramis G. Lozano-Gutiérrez
- Facultad de Ciencias Jurídicas y Sociales, Universidad Simón Bolívar, Barranquilla 080005, Colombia; (M.L.C.-H.); (M.L.M.-B.); (S.G.L.-G.); (M.A.); (W.P.-A.); (L.M.N.-M.); (M.D.L.H.); (E.M.-S.); (G.J.-F.); (M.S.-R.); (P.J.P.-R.)
| | - Mostapha Ahmad
- Facultad de Ciencias Jurídicas y Sociales, Universidad Simón Bolívar, Barranquilla 080005, Colombia; (M.L.C.-H.); (M.L.M.-B.); (S.G.L.-G.); (M.A.); (W.P.-A.); (L.M.N.-M.); (M.D.L.H.); (E.M.-S.); (G.J.-F.); (M.S.-R.); (P.J.P.-R.)
| | - Wilmar Pineda-Alhucema
- Facultad de Ciencias Jurídicas y Sociales, Universidad Simón Bolívar, Barranquilla 080005, Colombia; (M.L.C.-H.); (M.L.M.-B.); (S.G.L.-G.); (M.A.); (W.P.-A.); (L.M.N.-M.); (M.D.L.H.); (E.M.-S.); (G.J.-F.); (M.S.-R.); (P.J.P.-R.)
| | - Luz M. Noguera-Machacón
- Facultad de Ciencias Jurídicas y Sociales, Universidad Simón Bolívar, Barranquilla 080005, Colombia; (M.L.C.-H.); (M.L.M.-B.); (S.G.L.-G.); (M.A.); (W.P.-A.); (L.M.N.-M.); (M.D.L.H.); (E.M.-S.); (G.J.-F.); (M.S.-R.); (P.J.P.-R.)
| | - Moisés De La Hoz
- Facultad de Ciencias Jurídicas y Sociales, Universidad Simón Bolívar, Barranquilla 080005, Colombia; (M.L.C.-H.); (M.L.M.-B.); (S.G.L.-G.); (M.A.); (W.P.-A.); (L.M.N.-M.); (M.D.L.H.); (E.M.-S.); (G.J.-F.); (M.S.-R.); (P.J.P.-R.)
| | - Elsy Mejía-Segura
- Facultad de Ciencias Jurídicas y Sociales, Universidad Simón Bolívar, Barranquilla 080005, Colombia; (M.L.C.-H.); (M.L.M.-B.); (S.G.L.-G.); (M.A.); (W.P.-A.); (L.M.N.-M.); (M.D.L.H.); (E.M.-S.); (G.J.-F.); (M.S.-R.); (P.J.P.-R.)
| | - Giomar Jiménez-Figueroa
- Facultad de Ciencias Jurídicas y Sociales, Universidad Simón Bolívar, Barranquilla 080005, Colombia; (M.L.C.-H.); (M.L.M.-B.); (S.G.L.-G.); (M.A.); (W.P.-A.); (L.M.N.-M.); (M.D.L.H.); (E.M.-S.); (G.J.-F.); (M.S.-R.); (P.J.P.-R.)
| | - Manuel Sánchez-Rojas
- Facultad de Ciencias Jurídicas y Sociales, Universidad Simón Bolívar, Barranquilla 080005, Colombia; (M.L.C.-H.); (M.L.M.-B.); (S.G.L.-G.); (M.A.); (W.P.-A.); (L.M.N.-M.); (M.D.L.H.); (E.M.-S.); (G.J.-F.); (M.S.-R.); (P.J.P.-R.)
| | | | - Mauricio Arcos-Burgos
- Grupo de Investigación en Psiquiatría (GIPSI), Departamento de Psiquiatría, Instituto de Investigaciones Médicas, Facultad de Medicina, Universidad de Antioquia, Medellín 050010, Colombia
| | | | - Pedro J. Puentes-Rozo
- Facultad de Ciencias Jurídicas y Sociales, Universidad Simón Bolívar, Barranquilla 080005, Colombia; (M.L.C.-H.); (M.L.M.-B.); (S.G.L.-G.); (M.A.); (W.P.-A.); (L.M.N.-M.); (M.D.L.H.); (E.M.-S.); (G.J.-F.); (M.S.-R.); (P.J.P.-R.)
- Grupo de Neurociencias del Caribe, Universidad del Atlántico, Barranquilla 081007, Colombia
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Cervantes-Henríquez ML, Acosta-López JE, Martínez-Banfi ML, Vélez JI, Mejía-Segura E, Lozano-Gutiérrez SG, Sánchez-Rojas M, Zurbarán MA, Zurek EE, Arcos-Burgos M, Pineda DA, Puentes-Rozo PJ. ADHD Endophenotypes in Caribbean Families. J Atten Disord 2020; 24:2100-2114. [PMID: 29589797 DOI: 10.1177/1087054718763741] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Objective: The aim of this study is to contrast the genetics of neuropsychological tasks in individuals from nuclear families clustering ADHD in a Caribbean community. Method: We recruited and clinically characterized 408 individuals using an extensive battery of neuropsychological tasks. The genetic variance underpinning these tasks was estimated by heritability. A predictive framework for ADHD diagnosis was derived using these tasks. Results: We found that individuals with ADHD differed from controls in tasks of mental control, visuospatial ability, visuoverbal memory, phonological and verbal fluency, verbal and semantic fluency, cognitive flexibility, and cognitive ability. Among them, tasks of mental control, visuoverbal memory, phonological fluency, semantic verbal fluency, and intelligence had a significant heritability. A predictive model of ADHD diagnosis using these endophenotypes yields remarkable classification rate, sensitivity, specificity, and precision values (above 80%). Conclusion: We have dissected new cognitive endophenotypes in ADHD that can be suitable to assess the neurobiological and genetic basis of ADHD.
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Affiliation(s)
- M L Cervantes-Henríquez
- Grupo de Neurociencias del Caribe, Unidad de Neurociencias Cognitivas, Universidad Simón Bolívar, Barranquilla, Colombia.,Universidad del Norte, Barranquilla, Colombia
| | - J E Acosta-López
- Grupo de Neurociencias del Caribe, Unidad de Neurociencias Cognitivas, Universidad Simón Bolívar, Barranquilla, Colombia
| | - M L Martínez-Banfi
- Grupo de Neurociencias del Caribe, Unidad de Neurociencias Cognitivas, Universidad Simón Bolívar, Barranquilla, Colombia
| | - J I Vélez
- Universidad del Norte, Barranquilla, Colombia.,Genomics and Predictive Medicine Group, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - E Mejía-Segura
- Grupo de Neurociencias del Caribe, Unidad de Neurociencias Cognitivas, Universidad Simón Bolívar, Barranquilla, Colombia
| | - S G Lozano-Gutiérrez
- Grupo de Neurociencias del Caribe, Unidad de Neurociencias Cognitivas, Universidad Simón Bolívar, Barranquilla, Colombia
| | - M Sánchez-Rojas
- Grupo de Neurociencias del Caribe, Unidad de Neurociencias Cognitivas, Universidad Simón Bolívar, Barranquilla, Colombia
| | | | - E E Zurek
- Universidad del Norte, Barranquilla, Colombia
| | - M Arcos-Burgos
- Genomics and Predictive Medicine Group, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia.,Center For Research in Genetics and Genomics, Institute of Translational Medicine, School of Medicine and Health Sciences, Universidad del Rosario, Bogotá, Colombia
| | - D A Pineda
- Neuroscience Research Group, University of Antioquia, Medellín, Colombia.,Neuropsychology and Conduct Research Group, University of San Buenaventura, Medellín, Colombia
| | - P J Puentes-Rozo
- Grupo de Neurociencias del Caribe, Unidad de Neurociencias Cognitivas, Universidad Simón Bolívar, Barranquilla, Colombia.,Grupo de Neurociencias del Caribe, Universidad del Atlántico, Barranquilla, Colombia
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3
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Genetic risk factors and gene–environment interactions in adult and childhood attention-deficit/hyperactivity disorder. Psychiatr Genet 2019; 29:63-78. [DOI: 10.1097/ypg.0000000000000220] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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4
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Arcos-Burgos M, Vélez JI, Martinez AF, Ribasés M, Ramos-Quiroga JA, Sánchez-Mora C, Richarte V, Roncero C, Cormand B, Fernández-Castillo N, Casas M, Lopera F, Pineda DA, Palacio JD, Acosta-López JE, Cervantes-Henriquez ML, Sánchez-Rojas MG, Puentes-Rozo PJ, Molina BSG, Boden MT, Wallis D, Lidbury B, Newman S, Easteal S, Swanson J, Patel H, Volkow N, Acosta MT, Castellanos FX, de Leon J, Mastronardi CA, Muenke M. ADGRL3 (LPHN3) variants predict substance use disorder. Transl Psychiatry 2019; 9:42. [PMID: 30696812 PMCID: PMC6351584 DOI: 10.1038/s41398-019-0396-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 12/18/2018] [Accepted: 01/02/2019] [Indexed: 12/02/2022] Open
Abstract
Genetic factors are strongly implicated in the susceptibility to develop externalizing syndromes such as attention-deficit/hyperactivity disorder (ADHD), oppositional defiant disorder, conduct disorder, and substance use disorder (SUD). Variants in the ADGRL3 (LPHN3) gene predispose to ADHD and predict ADHD severity, disruptive behaviors comorbidity, long-term outcome, and response to treatment. In this study, we investigated whether variants within ADGRL3 are associated with SUD, a disorder that is frequently co-morbid with ADHD. Using family-based, case-control, and longitudinal samples from disparate regions of the world (n = 2698), recruited either for clinical, genetic epidemiological or pharmacogenomic studies of ADHD, we assembled recursive-partitioning frameworks (classification tree analyses) with clinical, demographic, and ADGRL3 genetic information to predict SUD susceptibility. Our results indicate that SUD can be efficiently and robustly predicted in ADHD participants. The genetic models used remained highly efficient in predicting SUD in a large sample of individuals with severe SUD from a psychiatric institution that were not ascertained on the basis of ADHD diagnosis, thus identifying ADGRL3 as a risk gene for SUD. Recursive-partitioning analyses revealed that rs4860437 was the predominant predictive variant. This new methodological approach offers novel insights into higher order predictive interactions and offers a unique opportunity for translational application in the clinical assessment of patients at high risk for SUD.
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Affiliation(s)
- Mauricio Arcos-Burgos
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA.
- INPAC Research Group, Fundación Universitaria Sanitas, Bogotá, Colombia.
- Instituto de Investigaciones Médicas (IIM), Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia.
| | - Jorge I Vélez
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
- Universidad del Norte, Barranquilla, Colombia
| | - Ariel F Martinez
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Marta Ribasés
- Psychiatric Genetics Unit, Group of Psychiatry, Mental Health and Addiction, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain
- Department of Psychiatry, Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Biomedical Network Research Centre on Mental Health (CIBERSAM), Barcelona, Spain
| | - Josep A Ramos-Quiroga
- Psychiatric Genetics Unit, Group of Psychiatry, Mental Health and Addiction, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain
- Department of Psychiatry, Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Biomedical Network Research Centre on Mental Health (CIBERSAM), Barcelona, Spain
- Department of Psychiatry and Legal Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Cristina Sánchez-Mora
- Psychiatric Genetics Unit, Group of Psychiatry, Mental Health and Addiction, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain
- Department of Psychiatry, Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Biomedical Network Research Centre on Mental Health (CIBERSAM), Barcelona, Spain
| | - Vanesa Richarte
- Department of Psychiatry, Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Biomedical Network Research Centre on Mental Health (CIBERSAM), Barcelona, Spain
- Department of Psychiatry and Legal Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Carlos Roncero
- Department of Psychiatry, Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Biomedical Network Research Centre on Mental Health (CIBERSAM), Barcelona, Spain
- Department of Psychiatry and Legal Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
- Addiction and Dual Diagnosis Unit, Departament of Psychiatry, Hospital Universitari Vall d'Hebron-Public Health Agency, Barcelona, Spain
| | - Bru Cormand
- Department of Genetics, Microbiology and Statistics, University of Barcelona, Barcelona, CAT, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Institut de Biomedicina de la Universitat de Barcelona (IBUB), Barcelona, CAT, Spain
- Institut de Recerca Sant Joan de Déu (IRSJD), Esplugues, CAT, Spain
| | - Noelia Fernández-Castillo
- Department of Genetics, Microbiology and Statistics, University of Barcelona, Barcelona, CAT, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
- Institut de Biomedicina de la Universitat de Barcelona (IBUB), Barcelona, CAT, Spain
- Institut de Recerca Sant Joan de Déu (IRSJD), Esplugues, CAT, Spain
| | - Miguel Casas
- Psychiatric Genetics Unit, Group of Psychiatry, Mental Health and Addiction, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain
- Department of Psychiatry, Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Biomedical Network Research Centre on Mental Health (CIBERSAM), Barcelona, Spain
- Department of Psychiatry and Legal Medicine, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Francisco Lopera
- Neuroscience Research Group, Universidad de Antioquia, Medellín, Colombia
| | - David A Pineda
- Neuroscience Research Group, Universidad de Antioquia, Medellín, Colombia
| | - Juan D Palacio
- Neuroscience Research Group, Universidad de Antioquia, Medellín, Colombia
| | - Johan E Acosta-López
- Grupo de Neurociencias del Caribe, Unidad de Neurociencias Cognitivas, Universidad Simón Bolívar, Barranquilla, Colombia
| | - Martha L Cervantes-Henriquez
- Universidad del Norte, Barranquilla, Colombia
- Grupo de Neurociencias del Caribe, Unidad de Neurociencias Cognitivas, Universidad Simón Bolívar, Barranquilla, Colombia
| | - Manuel G Sánchez-Rojas
- Grupo de Neurociencias del Caribe, Unidad de Neurociencias Cognitivas, Universidad Simón Bolívar, Barranquilla, Colombia
| | - Pedro J Puentes-Rozo
- Grupo de Neurociencias del Caribe, Unidad de Neurociencias Cognitivas, Universidad Simón Bolívar, Barranquilla, Colombia
- Grupo de Neurociencias del Caribe, Universidad del Atlántico, Barranquilla, Colombia
| | - Brooke S G Molina
- Departments of Psychiatry and Psychology, University of Pittsburg, Pittsburg, PA, USA
| | - Margaret T Boden
- University of Kentucky Mental Health Research Center at Eastern State Hospital, Lexington, KY, USA
| | - Deeann Wallis
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, USA
| | - Brett Lidbury
- National Center for Indigenous Genomics, Genome Biology Department, John Curtin School of Medical Research, ANU College of Medicine, Biology and Environment, The Australian National University, Canberra, ACT, Australia
| | - Saul Newman
- National Center for Indigenous Genomics, Genome Biology Department, John Curtin School of Medical Research, ANU College of Medicine, Biology and Environment, The Australian National University, Canberra, ACT, Australia
| | - Simon Easteal
- National Center for Indigenous Genomics, Genome Biology Department, John Curtin School of Medical Research, ANU College of Medicine, Biology and Environment, The Australian National University, Canberra, ACT, Australia
| | - James Swanson
- Department of Psychiatry, Florida International University, Miami, FL, USA
- Child Development Center, University of California at Irvine, Irvine, CA, USA
| | - Hardip Patel
- Genome Discovery Unit, Genome Biology Department, John Curtin School of Medical Research, ANU College of Medicine, Biology and Environment, The Australian National University, Canberra, ACT, Australia
| | - Nora Volkow
- Office of the Director, National Institute on Drug Abuse, National Institutes of Health, Rockville, MD, USA
| | - Maria T Acosta
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Francisco X Castellanos
- Department of Child and Adolescent Psychiatry, Hassenfeld Children's Hospital at NYU Langone, New York, NY, USA
- Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, USA
| | - Jose de Leon
- University of Kentucky Mental Health Research Center at Eastern State Hospital, Lexington, KY, USA
| | - Claudio A Mastronardi
- INPAC Research Group, Fundación Universitaria Sanitas, Bogotá, Colombia
- Center for Research in Genetics and Genomics, Institute of Translational Medicine, School of Medicine and Health Sciences, Universidad del Rosario, Bogotá, Colombia
| | - Maximilian Muenke
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA.
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Analysis of shared homozygosity regions in Saudi siblings with attention deficit hyperactivity disorder. Psychiatr Genet 2018; 27:131-138. [PMID: 28452824 PMCID: PMC5495552 DOI: 10.1097/ypg.0000000000000173] [Citation(s) in RCA: 6] [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]
Abstract
AIM Genetic and clinical complexities are common features of most psychiatric illnesses that pose a major obstacle in risk-gene identification. Attention deficit hyperactivity disorder (ADHD) is the most prevalent child-onset psychiatric illness, with high heritability. Over the past decade, numerous genetic studies utilizing various approaches, such as genome-wide association, candidate-gene association, and linkage analysis, have identified a multitude of candidate loci/genes. However, such studies have yielded diverse findings that are rarely reproduced, indicating that other genetic determinants have not been discovered yet. In this study, we carried out sib-pair analysis on seven multiplex families with ADHD from Saudi Arabia. We aimed to identify the candidate chromosomal regions and genes linked to the disease. PATIENTS AND METHODS A total of 41 individuals from multiplex families were analyzed for shared regions of homozygosity. Genes within these regions were prioritized according to their potential relevance to ADHD. RESULTS We identified multiple genomic regions spanning different chromosomes to be shared among affected members of each family; these included chromosomes 3, 5, 6, 7, 8, 9, 10, 13, 17, and 18. We also found specific regions on chromosomes 8 and 17 to be shared between affected individuals from more than one family. Among the genes present in the regions reported here were involved in neurotransmission (GRM3, SIGMAR1, CHAT, and SLC18A3) and members of the HLA gene family (HLA-A, HLA-DPA1, and MICC). CONCLUSION The candidate regions identified in this study highlight the genetic diversity of ADHD. Upon further investigation, these loci may reveal candidate genes that enclose variants associated with ADHD. Although most ADHD studies were conducted in other populations, our study provides insight from an understudied, ethnically interesting population.
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Linkage and association analysis of ADHD endophenotypes in extended and multigenerational pedigrees from a genetic isolate. Mol Psychiatry 2016; 21:1434-40. [PMID: 26598068 PMCID: PMC4879118 DOI: 10.1038/mp.2015.172] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 07/02/2015] [Accepted: 08/05/2015] [Indexed: 12/16/2022]
Abstract
Attention-deficit/hyperactivity disorder (ADHD) is a heritable, chronic, neurodevelopmental disorder with serious long-term repercussions. Despite being one of the most common cognitive disorders, the clinical diagnosis of ADHD is based on subjective assessments of perceived behaviors. Endophenotypes (neurobiological markers that cosegregate and are associated with an illness) are thought to provide a more powerful and objective framework for revealing the underlying neurobiology than syndromic psychiatric classification. Here, we present the results of applying genetic linkage and association analyses to neuropsychological endophenotypes using microsatellite and single nucleotide polymorphisms. We found several new genetic regions linked and/or associated with these endophenotypes, and others previously associated to ADHD, for example, loci harbored in the LPHN3, FGF1, POLR2A, CHRNA4 and ANKFY1 genes. These findings, when compared with those linked and/or associated to ADHD, suggest that these endophenotypes lie on shared pathways. The genetic information provided by this study offers a novel and complementary method of assessing the genetic causes underpinning the susceptibility to behavioral conditions and may offer new insights on the neurobiology of the disorder.
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Bruxel EM, Akutagava-Martins GC, Salatino-Oliveira A, Contini V, Kieling C, Hutz MH, Rohde LA. ADHD pharmacogenetics across the life cycle: New findings and perspectives. Am J Med Genet B Neuropsychiatr Genet 2014; 165B:263-82. [PMID: 24804845 DOI: 10.1002/ajmg.b.32240] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Accepted: 04/14/2014] [Indexed: 12/17/2022]
Abstract
Attention-deficit/hyperactivity disorder (ADHD) is a complex and heterogeneous disorder, affecting individuals across the life cycle. Although its etiology is not yet completely understood, genetics plays a substantial role. Pharmacological treatment is considered effective and safe for children and adults, but there is considerable inter-individual variability among patients regarding response to medication, required doses, and adverse events. We present here a systematic review of the literature on ADHD pharmacogenetics to provide a critical discussion of the existent findings, new approaches, limitations, and recommendations for future research. Our main findings are: first, the number of studies continues to grow, making ADHD one of the mental health areas with more pharmacogenetic studies. Second, there has been a focus shift on ADHD pharmacogenetic studies in the last years. There is an increasing number of studies assessing gene-gene and gene-environment interactions, using genome-wide association approaches, neuroimaging, and assessing pharmacokinetic properties. Third and most importantly, the heterogeneity in methodological strategies employed by different studies remains impressive. The question whether pharmacogenetics studies of ADHD will improve clinical management by shifting from trial-and-error approach to a pharmacological regimen that takes into account the individual variability remains unanswered. © 2014 Wiley Periodicals, Inc.
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Affiliation(s)
- Estela Maria Bruxel
- Genetics Department, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
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8
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Arcos-Burgos M, Londoño AC, Pineda DA, Lopera F, Palacio JD, Arbelaez A, Acosta MT, Vélez JI, Castellanos FX, Muenke M. Analysis of brain metabolism by proton magnetic resonance spectroscopy (1H-MRS) in attention-deficit/hyperactivity disorder suggests a generalized differential ontogenic pattern from controls. ATTENTION DEFICIT AND HYPERACTIVITY DISORDERS 2012; 4:205-12. [PMID: 23012086 PMCID: PMC3508358 DOI: 10.1007/s12402-012-0088-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Accepted: 07/02/2012] [Indexed: 12/27/2022]
Abstract
Attention-deficit/hyperactivity disorder (ADHD) is the most common behavioral disorder of childhood. Preliminary studies with proton magnetic resonance spectroscopy ((1)H-MRS) of the brain have reported differences in brain metabolite concentration-to-Cr ratios between individuals with ADHD and unaffected controls in several frontal brain regions including anterior cingulate cortex. Using multivoxel (1)H-MRS, we compared 14 individuals affected with ADHD to 20 individuals without ADHD from the same genetic isolate. After controlling by sex, age, and multiple testing, we found significant differences at the right posterior cingulate of the Glx/Cr ratio density distribution function between ADHD cases and controls (P < 0.05). Furthermore, we found several interactions of metabolite concentration-to-Cr ratio, age, and ADHD status: Ins/Cr and Glx/Cr ratios at the left posterior cingulate, and NAA/Cr at the splenius, right posterior cingulate, and at the left posterior cingulate. We also found a differential metabolite ratio interaction between ADHD cases and controls for Ins/Cr and NAA/Cr at the right striatum. These results show that: (1) NAA/Cr, Glx/Cr, and Ins/Cr ratios, as reported in other studies, exhibit significant differences between ADHD cases and controls; (2) differences of these metabolite ratios between ADHD cases and controls evolve in specific and recognizable patterns throughout age, a finding that replicates previous results obtained by structural MRI, where is demonstrated that brain ontogeny follows a different program in ADHD cases and controls; (3) Ins/Cr and NAA/Cr ratios, at the right striatum, interact in a differential way between ADHD cases and controls. As a whole, these results replicate previous 1H-MRS findings and add new intriguing differential metabolic and ontogeny patterns between ADHD cases and controls that warrant further pursue.
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Affiliation(s)
- Mauricio Arcos-Burgos
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
- John Curtin School of Medical Research, The Australian National University, Canberra ACT, Australia
| | - Ana C. Londoño
- Neurosciences Group, University of Antioquia, Medellín, Colombia
- Neurological Institute of Antioquia, Medellín, Colombia
| | - David A. Pineda
- Neurosciences Group, University of Antioquia, Medellín, Colombia
| | - Francisco Lopera
- Neurosciences Group, University of Antioquia, Medellín, Colombia
| | | | - Andres Arbelaez
- Neurosciences Group, University of Antioquia, Medellín, Colombia
| | - Maria T. Acosta
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Jorge I. Vélez
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Francisco Xavier Castellanos
- New York University Child Study Center, New York, NY
- Nathan Kline Institute for Psychiatric Research, Orangeburg, NY
| | - Maximilian Muenke
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
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Characteristics and comorbidity of ADHD sib pairs in the Central Valley of Costa Rica. Compr Psychiatry 2012; 53:379-86. [PMID: 21696714 PMCID: PMC3179797 DOI: 10.1016/j.comppsych.2011.05.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Revised: 05/04/2011] [Accepted: 05/07/2011] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND While genetic epidemiological studies demonstrate a substantial degree of genetic predisposition for attention-deficit/hyperactivity disorder (ADHD), they also suggest that the genetics are complex and may differ between populations or ethnic groups. OBJECTIVE This study describes the phenomenology of siblings with ADHD from the genetically isolated population of the Central Valley of Costa Rica. METHODS Rates of Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IV)-defined ADHD subtypes and comorbid conditions were calculated in a sample of 157 ADHD-affected children (probands and siblings) recruited for genetic studies using standardized approaches. Sib-sib comparisons and logistic regressions were conducted to identify significant patterns of concordance. RESULTS Combined-type ADHD (69.5%) was the most common subtype among probands, followed by the inattentive (27.4%), and hyperactive-impulsive (3.2%) subtypes. Anxiety disorders were prevalent (55.9%), as were disruptive behavior disorders (30.9%) and Tourette disorder (17.0%). Probands and siblings showed high sib-sib concordance for anxiety disorders. CONCLUSIONS ADHD in Costa Rica is similar in clinical and demographic characteristics to ADHD seen in other parts of the world, although the rates of co-occurring psychiatric disorders differ somewhat from those previously reported in Latin American samples. Comorbid anxiety is prevalent, with high rates of sib-sib concordance, and may represent a distinct, homogeneous subgroup suitable for genetic studies.
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A common variant of the latrophilin 3 gene, LPHN3, confers susceptibility to ADHD and predicts effectiveness of stimulant medication. Mol Psychiatry 2010; 15:1053-66. [PMID: 20157310 DOI: 10.1038/mp.2010.6] [Citation(s) in RCA: 199] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Attention-Deficit/Hyperactivity Disorder (ADHD) has a very high heritability (0.8), suggesting that about 80% of phenotypic variance is due to genetic factors. We used the integration of statistical and functional approaches to discover a novel gene that contributes to ADHD. For our statistical approach, we started with a linkage study based on large multigenerational families in a population isolate, followed by fine mapping of targeted regions using a family-based design. Family- and population-based association studies in five samples from disparate regions of the world were used for replication. Brain imaging studies were performed to evaluate gene function. The linkage study discovered a genome region harbored in the Latrophilin 3 gene (LPHN3). In the world-wide samples (total n=6360, with 2627 ADHD cases and 2531 controls) statistical association of LPHN3 and ADHD was confirmed. Functional studies revealed that LPHN3 variants are expressed in key brain regions related to attention and activity, affect metabolism in neural circuits implicated in ADHD, and are associated with response to stimulant medication. Linkage and replicated association of ADHD with a novel non-candidate gene (LPHN3) provide new insights into the genetics, neurobiology, and treatment of ADHD.
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11
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Arcos-Burgos M, Muenke M. Toward a better understanding of ADHD: LPHN3 gene variants and the susceptibility to develop ADHD. ACTA ACUST UNITED AC 2010; 2:139-47. [PMID: 21432600 DOI: 10.1007/s12402-010-0030-2] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Accepted: 07/29/2010] [Indexed: 12/14/2022]
Abstract
During the past 15 years, an impressive amount of genetic information has become available in the research field of psychiatry, particularly as it relates to attention-deficit/hyperactivity disorder (ADHD). However, the classical clinical approach to ADHD has minimally affected and not significantly been improved by this genetic revolution. It is difficult to predict how long it will take for genetic findings to alter the way clinicians treat patients with ADHD. New medications or treatment protocols may take years to become routine clinical practice. However, when taken together, recent successes in genomics, pharmacogenomics, and genetic epidemiology have the potential (1) to prevent comorbid consequences of ADHD, (2) to individualize therapies for patients with ADHD, and (3) to define new epidemiological policies to aid with the impact of ADHD on society. Here, we present an overview of how genetic research may affect and improve the quality of life of patients with ADHD: as an example, we use the discovery of LPHN3, a new gene in which variants have recently been shown to be associated with ADHD.
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Affiliation(s)
- Mauricio Arcos-Burgos
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
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12
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Palacio L, Falla D, Tobon I, Mejia F, Lewis JE, Martinez AF, Arcos-Burgos M, Camargo M. Pharmacogenetic Impact of VKORC1 and CYP2C9 Allelic Variants on Warfarin Dose Requirements in a Hispanic Population Isolate. Clin Appl Thromb Hemost 2009; 16:83-90. [DOI: 10.1177/1076029608330472] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Warfarin is the most prescribed oral anticoagulant worldwide. Because of the complexity of warfarin therapy, we attempted to dissect genetic from bioenvironmental factors influencing warfarin dose responses in individuals of a genetic isolate of Hispanic ancestry. A total of 191 patients with standard values of international normalized ratio were recruited. Three groups with a significantly different warfarin dose response were identified, that is, sensitive (2.28 ± 0.50 mg/d), intermediate (4.2 ± 0.76 mg/d), and resistant (7.40 ± 1.54 mg/d; Tukey test, P < .001). Age had a significant inverse correlation with warfarin dose (P < .001; effective dose diminished 0.56 mg/d/decade). Required doses were higher for individuals with CYP2C9 variants containing the allele *1 compared to those individuals with variants composed of other alleles (P = .006). Similarly, individuals with VKORC1-1639GG and VKORC1-1639GA genotypes also required higher doses compared to the AA genotype (P < .001). Evaluation of potential gene-gene interactions between CYP2C9 and VKORC1 polymorphisms showed significant differences in dosing for CYP2C9 genotypes within the VKORC1-1639G/A subgroup (P = .013). A stepwise multivariate linear regression analysis showed that 38.2% of the warfarin dose response variance was accounted for by a model involving age (20.9%), VKORC1-1639G/A (11.3%), and CYP2C9*1, *2, and *3 variants (7.1%). These results corroborate previous findings on warfarin pharmacogenetics and define a contrastable gene-bioenvironment interaction model suited to be used in Hispanic populations.
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Affiliation(s)
- Lina Palacio
- Instituto de Biología, Grupo de Genética de Poblaciones y Mutacarcinogénesis, Sede de Investigación Universitaria, Universidad de Antioquia, Medellin, Colombia
| | - Diana Falla
- Instituto de Biología, Grupo de Genética de Poblaciones y Mutacarcinogénesis, Sede de Investigación Universitaria, Universidad de Antioquia, Medellin, Colombia
| | - Ignacio Tobon
- Sección Vascular, Hospital Universitario San Vicente de Paúl, Medellin, Colombia
| | - Fernando Mejia
- Sección Vascular, Hospital Universitario San Vicente de Paúl, Medellin, Colombia
| | - John E. Lewis
- Department of Psychiatry and Behavioral Sciences, University of Miami Leonard M. Miller School of Medicine, Florida
| | - Ariel F. Martinez
- Department of Psychiatry and Behavioral Sciences, University of Miami Leonard M. Miller School of Medicine, Florida
| | - Mauricio Arcos-Burgos
- Department of Psychiatry and Behavioral Sciences, University of Miami Leonard M. Miller School of Medicine, Florida,
| | - Mauricio Camargo
- Instituto de Biología, Grupo de Genética de Poblaciones y Mutacarcinogénesis, Sede de Investigación Universitaria, Universidad de Antioquia, Medellin, Colombia
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Huss M. [Attention-deficit hyperactivity disorder: risk factors, protective factors, health supply, quality of life. A brief review]. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2008; 51:602-5. [PMID: 18446300 DOI: 10.1007/s00103-008-0538-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Attention-deficit hyperactivity disorder (ADHD) is a chronic behavioural disorder diagnosed in 4.8 % of German children and adolescents. Although many studies indicate primarily a neurobiological etiology, the disorder cannot be diagnosed on the basis of specific markers. The principal aspect of diagnosis is the experienced clinician who must also take the differentiation of other behavioural disorders into account. In addition to inheritance, other known risk factors are nicotine exposition in pregnancy, adverse psychosocial conditions and birth complications. Protective factors are cognitive abilities, positive social contacts, and early treatment. The necessary structures in community support are developing; however, substantial enhancement is needed. Studies on quality of life indicate that ADHD should not be reduced to core symptoms since affected children are impaired in almost all areas of daily life.
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Affiliation(s)
- Michael Huss
- Klinikum der Johannes Gutenberg-Universität, Main, BRD.
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14
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Wallis D, Russell HF, Muenke M. Review: Genetics of Attention Deficit/Hyperactivity Disorder. J Pediatr Psychol 2008; 33:1085-99. [DOI: 10.1093/jpepsy/jsn049] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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15
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Pineda DA, Palacio LG, Puerta IC, Merchán V, Arango CP, Galvis AY, Gómez M, Aguirre DC, Lopera F, Arcos-Burgos M. Environmental influences that affect attention deficit/hyperactivity disorder: study of a genetic isolate. Eur Child Adolesc Psychiatry 2007; 16:337-46. [PMID: 17487441 DOI: 10.1007/s00787-007-0605-4] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Three independent complex segregation analyses found that the cause of Attention Deficit/Hyperactivity Disorder (ADHD) was the presence of major genes interacting with environmental influences. In order to identify potential environmental risk factors for ADHD in the Paisa community--a very well described, genetically isolated group--we randomly selected a sample of 486 children between 6 and 11 years of age. This group included 200 children with ADHD (149 males and 51 females) and 286 healthy controls (135 males and 151 females). The ADHD DSM-IV diagnosis was obtained using the DICA and BASC evaluation instruments, and the children's mothers or grandmothers filled out a questionnaire on each child's exposure to prenatal, neonatal, and early childhood risk factors. The data were analyzed using cross tabulation and stepwise logistic multiple-regression analyses. Cross tabulation associated ADHD with a variety of factors, including miscarriage symptoms, premature delivery symptoms, maternal respiratory viral infection, moderate to severe physical illness in the mother during gestation, prenatal cigarette and alcohol exposure, neonatal seizures, asphyxia or anoxia, severe neonatal illness, mild speech retardation, moderate brain injury, and febrile seizures (odds ratio >or= 2, P < 0.05). Stepwise logistic multiple-regression analysis also uncovered a block of variables, including male gender, maternal illnesses, prenatal alcohol exposure, mild speech retardation, febrile seizures, and moderate brain injury (odds ratio >or= 2.0, P < 0.05). Future studies on the risk of developing ADHD must include these environmental factors as covariates.
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Affiliation(s)
- David A Pineda
- Neuropsychology and Conduct Disorder Group, Faculty of Psychology, Master Program of Neuropsychology, University of San Buenaventura, Medellin, Colombia
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16
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Jain M, Palacio LG, Castellanos FX, Palacio JD, Pineda D, Restrepo MI, Muñoz JF, Lopera F, Wallis D, Berg K, Bailey-Wilson JE, Arcos-Burgos M, Muenke M. Attention-deficit/hyperactivity disorder and comorbid disruptive behavior disorders: evidence of pleiotropy and new susceptibility loci. Biol Psychiatry 2007; 61:1329-39. [PMID: 16950213 DOI: 10.1016/j.biopsych.2006.06.026] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2006] [Revised: 05/22/2006] [Accepted: 06/14/2006] [Indexed: 10/24/2022]
Abstract
BACKGROUND Attention-deficit/hyperactivity disorder (ADHD) comorbid with oppositional defiant disorder (ODD) or conduct disorder (CD) and substance abuse/dependence seems to represent a specific subset within the phenotypic ADHD spectrum. METHODS We applied complex segregation and linkage analyses in a set of multigenerational families densely segregating ADHD comorbid with ODD, CD, alcohol abuse/dependence, and nicotine dependence. RESULTS Our data suggest that ADHD cosegregates with disruptive behaviors as a unique, phenotypically variable trait as evidenced by highly significant pair-wise linkages among: ADHD and ODD (logarithm of odds [LOD]=14.19), ADHD and CD (LOD=5.34), ODD and CD (LOD=6.68), and CD and alcohol abuse/dependence (LOD=3.98). In addition to previously reported ADHD susceptibility loci, we found evidence of linkage for comorbid ADHD phenotypes to loci at 8q24, 2p21-22.3, 5p13.1-p13.3, 12p11.23-13.3, 8q15, and 14q21.1-22.2. These results were replicated with an affected status phenotype derived from latent class clusters. CONCLUSIONS Patterns of cosegregation of ADHD with comorbidities can inform our understanding of the inheritance patterns not only of ADHD but also of disruptive behavioral disorders and alcohol abuse/dependence. Refining the comorbid ADHD phenotype by determining the cosegregation profile of specific comorbidities might be a powerful tool for defining significant regions of linkage.
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Affiliation(s)
- Mahim Jain
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892-3717, USA
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17
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van der Walt JM, Scott WK, Slifer S, Gaskell PC, Martin ER, Welsh-Bohmer K, Creason M, Crunk A, Fuzzell D, McFarland L, Kroner CC, Jackson CE, Haines JL, Pericak-Vance MA. Maternal lineages and Alzheimer disease risk in the Old Order Amish. Hum Genet 2005; 118:115-22. [PMID: 16078048 DOI: 10.1007/s00439-005-0032-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2005] [Accepted: 06/27/2005] [Indexed: 10/25/2022]
Abstract
Old Order Amish, founded by a small number of Swiss immigrants, exist in culturally isolated communities across rural North America. The consequences of genetic isolation and inbreeding within this group are evident by increased frequencies of many monogenic diseases and several complex disorders. Conversely, the prevalence of Alzheimer disease (AD), the most common form of dementia, is lower in the Amish than in the general American population. Since mitochondrial dysfunction has been proposed as an underlying cause of AD and a specific haplogroup was found to affect AD susceptibility in Caucasians, we investigated whether inherited mitochondrial haplogroups affect risk of developing AD dementia in Ohio and Indiana Amish communities. Ninety-five independent matrilines were observed across six large pedigrees and three small pedigrees then classified into seven major European haplogroups. Haplogroup T is the most frequent haplogroup represented overall in these maternal lines (35.4%) while observed in only 10.6% in outbred American and European populations. Furthermore, haplogroups J and K are less frequent (1.0%) than in the outbred data set (9.4-11.2%). Affected case matrilines and unaffected control lines were chosen from pedigrees to test whether specific haplogroups and their defining SNPs confer risk of AD. We did not observe frequency differences between AD cases compared to controls overall or when stratified by sex. Therefore, we suggest that the genetic effect responsible for AD dementia in the affected Amish pedigrees is unlikely to be of mitochondrial origin and may be caused by nuclear genetic factors.
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Affiliation(s)
- Joelle M van der Walt
- Department of Medicine and Center for Human Genetics, Duke University Medical Center, Durham, NC 27710, USA
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Pineda DA, Aguirre DC, Garcia MA, Lopera FJ, Palacio LG, Kamphaus RW. Validation of two rating scales for attention-deficit hyperactivity disorder diagnosis in Colombian children. Pediatr Neurol 2005; 33:15-25. [PMID: 15993319 DOI: 10.1016/j.pediatrneurol.2005.02.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2004] [Accepted: 08/27/2004] [Indexed: 10/25/2022]
Abstract
This study assesses the validity of the Behavioral Assessment System for Children-parent and teacher questionnaires for attention-deficit hyperactivity disorder diagnosis in a randomized sample of 344 Colombian children (145 cases, 199 controls), males and females, ages 6 to 11, with an estimated Wechsler Full Scale Intelligence Quotient over 70. The assessment protocol for both groups included psychiatric, neurologic, and psychological interviews, parent and teacher rating forms, and an Attention-Deficit Hyperactivity Disorder Checklist. All Behavioral Assessment System for Children-parent and teacher dimensions, except withdrawal and somatization, significantly differentiated cases and controls. Parents and teachers rated attention-deficit hyperactivity disorder combined type children as significantly more aggressive. Both questionnaires had good discriminant accuracy for detecting cases and control children, but accuracy for discriminating between attention-deficit hyperactivity disorder subtypes was poor. The Behavioral Assessment System for Children-parent and teacher questionnaires for 6- to 11-year-olds may be useful tools for diagnosing the presence of attention-deficit hyperactivity disorder. Additional assessment methods will be needed to discriminate between the subtypes.
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Affiliation(s)
- David A Pineda
- Group of Neuropsychology and Conduct Disorder, University of San Buenaventura Medellín, Colombia
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19
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Arcos-Burgos M, Castellanos FX, Pineda D, Lopera F, David Palacio J, Guillermo Palacio L, Rapoport JL, Berg K, Bailey-Wilson JE, Muenke M. Attention-deficit/hyperactivity disorder in a population isolate: linkage to loci at 4q13.2, 5q33.3, 11q22, and 17p11. Am J Hum Genet 2004; 75:998-1014. [PMID: 15497111 PMCID: PMC1182160 DOI: 10.1086/426154] [Citation(s) in RCA: 162] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2004] [Accepted: 09/21/2004] [Indexed: 12/21/2022] Open
Abstract
Attention-deficit/hyperactivity disorder (ADHD [MIM 143465]) is the most common behavioral disorder of childhood. Twin, adoption, segregation, association, and linkage studies have confirmed that genetics plays a major role in conferring susceptibility to ADHD. We applied model-based and model-free linkage analyses, as well as the pedigree disequilibrium test, to the results of a genomewide scan of extended and multigenerational families with ADHD from a genetic isolate. In these families, ADHD is highly comorbid with conduct and oppositional defiant disorders, as well as with alcohol and tobacco dependence. We found evidence of linkage to markers at chromosomes 4q13.2, 5q33.3, 8q11.23, 11q22, and 17p11 in individual families. Fine mapping applied to these regions resulted in significant linkage in the combined families at chromosomes 4q13.2 (two-point allele-sharing LOD score from LODPAL = 4.44 at D4S3248), 5q33.3 (two-point allele-sharing LOD score from LODPAL = 8.22 at D5S490), 11q22 (two-point allele-sharing LOD score from LODPAL = 5.77 at D11S1998; multipoint nonparametric linkage [NPL]-log[P value] = 5.49 at approximately 128 cM), and 17p11 (multipoint NPL-log [P value] >12 at approximately 12 cM; multipoint maximum location score 2.48 [alpha = 0.10] at approximately 12 cM; two-point allele-sharing LOD score from LODPAL = 3.73 at D17S1159). Additionally, suggestive linkage was found at chromosome 8q11.23 (combined two-point NPL-log [P value] >3.0 at D8S2332). Several of these regions are novel (4q13.2, 5q33.3, and 8q11.23), whereas others replicate already-published loci (11q22 and 17p11). The concordance between results from different analytical methods of linkage and the replication of data between two independent studies suggest that these loci truly harbor ADHD susceptibility genes.
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Affiliation(s)
- Mauricio Arcos-Burgos
- National Human Genome Research Institute and National Institute of Mental Health, National Institutes of Health, Bethesda; Population Genetics, Mutacarcinogenesis and Genetic Epidemiology Group, and Neurosciences Group, University of Antioquia, Medellín, Colombia; and New York University Child Study Center, New York
| | - F. Xavier Castellanos
- National Human Genome Research Institute and National Institute of Mental Health, National Institutes of Health, Bethesda; Population Genetics, Mutacarcinogenesis and Genetic Epidemiology Group, and Neurosciences Group, University of Antioquia, Medellín, Colombia; and New York University Child Study Center, New York
| | - David Pineda
- National Human Genome Research Institute and National Institute of Mental Health, National Institutes of Health, Bethesda; Population Genetics, Mutacarcinogenesis and Genetic Epidemiology Group, and Neurosciences Group, University of Antioquia, Medellín, Colombia; and New York University Child Study Center, New York
| | - Francisco Lopera
- National Human Genome Research Institute and National Institute of Mental Health, National Institutes of Health, Bethesda; Population Genetics, Mutacarcinogenesis and Genetic Epidemiology Group, and Neurosciences Group, University of Antioquia, Medellín, Colombia; and New York University Child Study Center, New York
| | - Juan David Palacio
- National Human Genome Research Institute and National Institute of Mental Health, National Institutes of Health, Bethesda; Population Genetics, Mutacarcinogenesis and Genetic Epidemiology Group, and Neurosciences Group, University of Antioquia, Medellín, Colombia; and New York University Child Study Center, New York
| | - Luis Guillermo Palacio
- National Human Genome Research Institute and National Institute of Mental Health, National Institutes of Health, Bethesda; Population Genetics, Mutacarcinogenesis and Genetic Epidemiology Group, and Neurosciences Group, University of Antioquia, Medellín, Colombia; and New York University Child Study Center, New York
| | - Judith L. Rapoport
- National Human Genome Research Institute and National Institute of Mental Health, National Institutes of Health, Bethesda; Population Genetics, Mutacarcinogenesis and Genetic Epidemiology Group, and Neurosciences Group, University of Antioquia, Medellín, Colombia; and New York University Child Study Center, New York
| | - Kate Berg
- National Human Genome Research Institute and National Institute of Mental Health, National Institutes of Health, Bethesda; Population Genetics, Mutacarcinogenesis and Genetic Epidemiology Group, and Neurosciences Group, University of Antioquia, Medellín, Colombia; and New York University Child Study Center, New York
| | - Joan E. Bailey-Wilson
- National Human Genome Research Institute and National Institute of Mental Health, National Institutes of Health, Bethesda; Population Genetics, Mutacarcinogenesis and Genetic Epidemiology Group, and Neurosciences Group, University of Antioquia, Medellín, Colombia; and New York University Child Study Center, New York
| | - Maximilian Muenke
- National Human Genome Research Institute and National Institute of Mental Health, National Institutes of Health, Bethesda; Population Genetics, Mutacarcinogenesis and Genetic Epidemiology Group, and Neurosciences Group, University of Antioquia, Medellín, Colombia; and New York University Child Study Center, New York
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20
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Palacio JD, Castellanos FX, Pineda DA, Lopera F, Arcos-Burgos M, Quiroz YT, Henao GC, Puerta IC, Ramírez DL, Rapoport JL, Bailey-Wilson J, Berg K, Muenke M. Attention-deficit/hyperactivity disorder and comorbidities in 18 Paisa Colombian multigenerational families. J Am Acad Child Adolesc Psychiatry 2004; 43:1506-15. [PMID: 15564820 DOI: 10.1097/01.chi.0000142279.79805.dc] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
OBJECTIVE Eighteen extended multigenerational families were recruited from the genetically isolated Paisa community in Colombia to conduct genetic studies of attention-deficit/hyperactivity disorder (ADHD). This report describes the inclusion strategy and clinical features of participants to facilitate comparisons with other data sets. METHOD Families were selected through a fixed-sampling scheme beginning with child probands referred for clinical evaluation for ADHD. Direct structured psychiatric interviews were conducted with 433 informative individuals, including 92 children aged 4 to 11, 57 adolescents aged 12 to 17, and 284 adults. Best estimate ADHD diagnoses were established for each informative pedigree member. RESULTS These families contained a high proportion of individuals affected with ADHD (32.8%), which was highly comorbid with conduct disorder (50%; odds ratio 11.5, 95% confidence interval = 6.4-20.9), oppositional defiant disorder (25.4%; odds ratio 2.7, confidence interval = 1.5-4.8), and associated conditions including nicotine dependence and alcohol abuse and/or dependence. CONCLUSIONS ADHD in these extended Paisa families is highly comorbid with conduct and oppositional defiant disorders. This pattern of comorbidity, as well as the large dense pedigrees of the sample, suggests that it will be particularly useful for molecular genetic studies that are currently under way.
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Affiliation(s)
- Juan D Palacio
- Neurosciences Group, University of Antioquia, Medellín, Colombia
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Acosta MT, Arcos-Burgos M, Muenke M. Attention deficit/hyperactivity disorder (ADHD): complex phenotype, simple genotype? Genet Med 2004; 6:1-15. [PMID: 14726804 DOI: 10.1097/01.gim.0000110413.07490.0b] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Complex genetic traits refer to those phenotypes not fitting patterns of Mendelian segregation and/or assortment but exhibiting a preferential familial clustering that cannot be explained by cultural or environmental causes. Attention-deficit/hyperactivity disorder (ADHD) is the most common neurodevelopmental disorder of childhood and probably the most controversial. ADHD has been considered a complex genetic trait based upon the absence of a clear-cut boundary between affected and unaffected status. Furthermore, its high comorbidity with other disorders strongly suggests complex epistatic or pleiotropic effects acting in common with the environmental influences. This implies that the same gene or genes is or are associated with different and concurrently occurring phenotypes. In this study, we will review clinical and epidemiological aspects related to the ADHD phenotype, which are considered either as categorical or continuous traits. We also will discuss genetic models underlying the complexity of this behavioral phenotype and the probable role of epistatic interactions between major genes contributing to the ADHD phenotype.
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Affiliation(s)
- Maria Teresa Acosta
- Department of Neurology, Children's National Medical Center, Washington, DC, USA
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Arcos-Burgos M, Castellanos FX, Konecki D, Lopera F, Pineda D, Palacio JD, Rapoport JL, Berg K, Bailey-Wilson J, Muenke M. Pedigree disequilibrium test (PDT) replicates association and linkage between DRD4 and ADHD in multigenerational and extended pedigrees from a genetic isolate. Mol Psychiatry 2004; 9:252-9. [PMID: 15094785 DOI: 10.1038/sj.mp.4001396] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Association/linkage between dopamine D4 receptor (DRD4) polymorphisms and attention-deficit/hyperactivity disorder (ADHD) has been suggested by case-control- and nuclear-family-based studies. Here, we present a candidate gene analysis for DRD4 using 14 extended and multigenerational families segregating ADHD derived from the 'Paisa' community of Antioquia, Colombia, a genetic isolate. Two DRD4 polymorphisms (a 120 bp tandem duplication at the promoter and a 48 bp-VNTR at exon 3), reported associated to ADHD, were genotyped. Parametric and non-parametric linkage analyses, and a family-based association test (FBAT), the pedigree disequilibrium test (PDT), were applied to search for evidence of association/linkage. Two-point LOD scores were significantly negative, with values ranging from -3.21 (P=0.011158) to -7.66 (P=0.000091 at theta=0). Non-parametrical analysis resulted in nonsignificant evidence for linkage. The PDT showed a moderate trend toward significance of association/linkage between the 7-repeat (7R) allele at the 48 bp VNTR and ADHD (P=0.0578). Furthermore, the haplotype analysis shows a significant association/linkage of the 7R-240 bp haplotype (P=0.0467) with ADHD. Results suggest that either a moderate DRD4 genetic effect, or linkage disequilibrium of DRD4 with an ADHD disease locus in the vicinity or the linkage to a phenotypic component of the ADHD spectrum could be underlying this association/linkage. These results provide further evidence for the association of ADHD to genetic variation in or near to DRD4 and replicate the previously reported association between ADHD and the 7R allele.
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Affiliation(s)
- M Arcos-Burgos
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD 20892-1852, USA
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