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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] [What about the content of this article? (0)] [Affiliation(s)] [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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2
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Wong ML, Arcos-Burgos M, Liu S, Vélez JI, Yu C, Baune BT, Jawahar MC, Arolt V, Dannlowski U, Chuah A, Huttley GA, Fogarty R, Lewis MD, Bornstein SR, Licinio J. The PHF21B gene is associated with major depression and modulates the stress response. Mol Psychiatry 2017; 22:1015-1025. [PMID: 27777418 PMCID: PMC5461220 DOI: 10.1038/mp.2016.174] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 08/14/2016] [Accepted: 08/16/2016] [Indexed: 12/04/2022]
Abstract
Major depressive disorder (MDD) affects around 350 million people worldwide; however, the underlying genetic basis remains largely unknown. In this study, we took into account that MDD is a gene-environment disorder, in which stress is a critical component, and used whole-genome screening of functional variants to investigate the 'missing heritability' in MDD. Genome-wide association studies (GWAS) using single- and multi-locus linear mixed-effect models were performed in a Los Angeles Mexican-American cohort (196 controls, 203 MDD) and in a replication European-ancestry cohort (499 controls, 473 MDD). Our analyses took into consideration the stress levels in the control populations. The Mexican-American controls, comprised primarily of recent immigrants, had high levels of stress due to acculturation issues and the European-ancestry controls with high stress levels were given higher weights in our analysis. We identified 44 common and rare functional variants associated with mild to moderate MDD in the Mexican-American cohort (genome-wide false discovery rate, FDR, <0.05), and their pathway analysis revealed that the three top overrepresented Gene Ontology (GO) processes were innate immune response, glutamate receptor signaling and detection of chemical stimulus in smell sensory perception. Rare variant analysis replicated the association of the PHF21B gene in the ethnically unrelated European-ancestry cohort. The TRPM2 gene, previously implicated in mood disorders, may also be considered replicated by our analyses. Whole-genome sequencing analyses of a subset of the cohorts revealed that European-ancestry individuals have a significantly reduced (50%) number of single nucleotide variants compared with Mexican-American individuals, and for this reason the role of rare variants may vary across populations. PHF21b variants contribute significantly to differences in the levels of expression of this gene in several brain areas, including the hippocampus. Furthermore, using an animal model of stress, we found that Phf21b hippocampal gene expression is significantly decreased in animals resilient to chronic restraint stress when compared with non-chronically stressed animals. Together, our results reveal that including stress level data enables the identification of novel rare functional variants associated with MDD.
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Affiliation(s)
- M-L Wong
- Mind & Brain Theme, South Australian
Health and Medical Research Institute (SAHMRI), Adelaide,
SA, Australia,Department of Psychiatry, Flinders
University School of Medicine, Bedford Park, SA,
Australia,Mind & Brain Theme, South Australian Health and Medical
Research Institute (SAHMRI), North Terrace, PO Box 11060,
Adelaide, SA
5001, Australia. E-mail: or
| | - M Arcos-Burgos
- Department of Genome Sciences, John
Curtin School of Medical Research, Australian National University,
Canberra, ACT, Australia,University of Rosario International
Institute of Translational Medicine, Bogotá,
Colombia
| | - S Liu
- Mind & Brain Theme, South Australian
Health and Medical Research Institute (SAHMRI), Adelaide,
SA, Australia,Department of Psychiatry, Flinders
University School of Medicine, Bedford Park, SA,
Australia
| | - J I Vélez
- Department of Genome Sciences, John
Curtin School of Medical Research, Australian National University,
Canberra, ACT, Australia,Universidad del Norte,
Barranquilla, Colombia
| | - C Yu
- Mind & Brain Theme, South Australian
Health and Medical Research Institute (SAHMRI), Adelaide,
SA, Australia,Department of Psychiatry, Flinders
University School of Medicine, Bedford Park, SA,
Australia
| | - B T Baune
- Discipline of Psychiatry, University of
Adelaide, Adelaide, SA, Australia
| | - M C Jawahar
- Discipline of Psychiatry, University of
Adelaide, Adelaide, SA, Australia
| | - V Arolt
- Department of Psychiatry and
Psychotherapy, University of Münster, Münster,
Germany
| | - U Dannlowski
- Department of Psychiatry and
Psychotherapy, University of Münster, Münster,
Germany,Department of Psychiatry and
Psychotherapy, University of Marburg, Marburg,
Germany
| | - A Chuah
- Department of Genome Sciences, John
Curtin School of Medical Research, Australian National University,
Canberra, ACT, Australia
| | - G A Huttley
- Department of Genome Sciences, John
Curtin School of Medical Research, Australian National University,
Canberra, ACT, Australia
| | - R Fogarty
- Mind & Brain Theme, South Australian
Health and Medical Research Institute (SAHMRI), Adelaide,
SA, Australia
| | - M D Lewis
- Mind & Brain Theme, South Australian
Health and Medical Research Institute (SAHMRI), Adelaide,
SA, Australia,Department of Psychiatry, Flinders
University School of Medicine, Bedford Park, SA,
Australia
| | - S R Bornstein
- Department of Psychiatry and
Psychotherapy, University of Münster, Münster,
Germany,Medical Clinic III, Carl Gustav Carus
University Hospital, Dresden University of Technology, Dresden,
Germany
| | - J Licinio
- Mind & Brain Theme, South Australian
Health and Medical Research Institute (SAHMRI), Adelaide,
SA, Australia,Department of Psychiatry, Flinders
University School of Medicine, Bedford Park, SA,
Australia,Mind & Brain Theme, South Australian Health and Medical
Research Institute (SAHMRI), North Terrace, PO Box 11060,
Adelaide, SA
5001, Australia. E-mail: or
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3
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Vélez JI, Lopera F, Sepulveda-Falla D, Patel HR, Johar AS, Chuah A, Tobón C, Rivera D, Villegas A, Cai Y, Peng K, Arkell R, Castellanos FX, Andrews SJ, Silva Lara MF, Creagh PK, Easteal S, de Leon J, Wong ML, Licinio J, Mastronardi CA, Arcos-Burgos M. APOE*E2 allele delays age of onset in PSEN1 E280A Alzheimer's disease. Mol Psychiatry 2016; 21:916-24. [PMID: 26619808 PMCID: PMC5414071 DOI: 10.1038/mp.2015.177] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 10/07/2015] [Accepted: 10/14/2015] [Indexed: 01/10/2023]
Abstract
Alzheimer's disease (AD) age of onset (ADAOO) varies greatly between individuals, with unique causal mutations suggesting the role of modifying genetic and environmental interactions. We analyzed ~50 000 common and rare functional genomic variants from 71 individuals of the 'Paisa' pedigree, the world's largest pedigree segregating a severe form of early-onset AD, who were affected carriers of the fully penetrant E280A mutation in the presenilin-1 (PSEN1) gene. Affected carriers with ages at the extremes of the ADAOO distribution (30s-70s age range), and linear mixed-effects models were used to build single-locus regression models outlining the ADAOO. We identified the rs7412 (APOE*E2 allele) as a whole exome-wide ADAOO modifier that delays ADAOO by ~12 years (β=11.74, 95% confidence interval (CI): 8.07-15.41, P=6.31 × 10(-8), PFDR=2.48 × 10(-3)). Subsequently, to evaluate comprehensively the APOE (apolipoprotein E) haplotype variants (E1/E2/E3/E4), the markers rs7412 and rs429358 were genotyped in 93 AD affected carriers of the E280A mutation. We found that the APOE*E2 allele, and not APOE*E4, modifies ADAOO in carriers of the E280A mutation (β=8.24, 95% CI: 4.45-12.01, P=3.84 × 10(-5)). Exploratory linear mixed-effects multilocus analysis suggested that other functional variants harbored in genes involved in cell proliferation, protein degradation, apoptotic and immune dysregulation processes (i.e., GPR20, TRIM22, FCRL5, AOAH, PINLYP, IFI16, RC3H1 and DFNA5) might interact with the APOE*E2 allele. Interestingly, suggestive evidence as an ADAOO modifier was found for one of these variants (GPR20) in a set of patients with sporadic AD from the Paisa genetic isolate. This is the first study demonstrating that the APOE*E2 allele modifies the natural history of AD typified by the age of onset in E280A mutation carriers. To the best of our knowledge, this is the largest analyzed sample of patients with a unique mutation sharing uniform environment. Formal replication of our results in other populations and in other forms of AD will be crucial for prediction, follow-up and presumably developing new therapeutic strategies for patients either at risk or affected by AD.
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Affiliation(s)
- J I Vélez
- Genomics and Predictive Medicine Group, Department of Genome Sciences, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia.,Neuroscience Research Group, University of Antioquia, Medellín, Colombia
| | - F Lopera
- Neuroscience Research Group, University of Antioquia, Medellín, Colombia
| | - D Sepulveda-Falla
- Neuroscience Research Group, University of Antioquia, Medellín, Colombia.,Institute of Neuropathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - H R Patel
- Genomics and Predictive Medicine Group, Department of Genome Sciences, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - A S Johar
- Genomics and Predictive Medicine Group, Department of Genome Sciences, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - A Chuah
- Genome Discovery Unit, Department of Genome Sciences, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - C Tobón
- Neuroscience Research Group, University of Antioquia, Medellín, Colombia
| | - D Rivera
- Neuroscience Research Group, University of Antioquia, Medellín, Colombia
| | - A Villegas
- Neuroscience Research Group, University of Antioquia, Medellín, Colombia
| | - Y Cai
- Genomics and Predictive Medicine Group, Department of Genome Sciences, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - K Peng
- Biomolecular Resource Facility, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - R Arkell
- Early Mammalian Development Laboratory, Research School of Biology, The Australian National University, Canberra, ACT, Australia
| | - F X Castellanos
- NYU Child Study Center, NYU Langone Medical Center, New York, NY, USA.,Nathan Kline Institute for Psychiatric Research, Orangeburg, NY, USA
| | - S J Andrews
- Genome Diversity and Health Group, Department of Genome Sciences, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - M F Silva Lara
- Genomics and Predictive Medicine Group, Department of Genome Sciences, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - P K Creagh
- Genomics and Predictive Medicine Group, Department of Genome Sciences, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - S Easteal
- Genome Diversity and Health Group, Department of Genome Sciences, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia
| | - J de Leon
- Mental Health Research Center at Eastern State Hospital, University of Kentucky, Lexington, KY, USA
| | - M L Wong
- South Australian Health and Medical Research Institute and Department of Psychiatry, School of Medicine, Flinders University, Adelaide, SA, Australia
| | - J Licinio
- South Australian Health and Medical Research Institute and Department of Psychiatry, School of Medicine, Flinders University, Adelaide, SA, Australia
| | - C A Mastronardi
- Genomics and Predictive Medicine Group, Department of Genome Sciences, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia.,South Australian Health and Medical Research Institute and Department of Psychiatry, School of Medicine, Flinders University, Adelaide, SA, Australia
| | - M Arcos-Burgos
- Genomics and Predictive Medicine Group, Department of Genome Sciences, John Curtin School of Medical Research, The Australian National University, Canberra, ACT, Australia.,Neuroscience Research Group, University of Antioquia, Medellín, Colombia
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4
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Vélez JI, Chandrasekharappa SC, Henao E, Martinez AF, Harper U, Jones M, Solomon BD, Lopez L, Garcia G, Aguirre-Acevedo DC, Acosta-Baena N, Correa JC, Lopera-Gómez CM, Jaramillo-Elorza MC, Rivera D, Kosik KS, Schork NJ, Swanson JM, Lopera F, Arcos-Burgos M. Pooling/bootstrap-based GWAS (pbGWAS) identifies new loci modifying the age of onset in PSEN1 p.Glu280Ala Alzheimer's disease. Mol Psychiatry 2013; 18:568-75. [PMID: 22710270 PMCID: PMC3596442 DOI: 10.1038/mp.2012.81] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The literature on GWAS (genome-wide association studies) data suggests that very large sample sizes (for example, 50,000 cases and 50,000 controls) may be required to detect significant associations of genomic regions for complex disorders such as Alzheimer's disease (AD). Because of the challenges of obtaining such large cohorts, we describe here a novel sequential strategy that combines pooling of DNA and bootstrapping (pbGWAS) in order to significantly increase the statistical power and exponentially reduce expenses. We applied this method to a very homogeneous sample of patients belonging to a unique and clinically well-characterized multigenerational pedigree with one of the most severe forms of early onset AD, carrying the PSEN1 p.Glu280Ala mutation (often referred to as E280A mutation), which originated as a consequence of a founder effect. In this cohort, we identified novel loci genome-wide significantly associated as modifiers of the age of onset of AD (CD44, rs187116, P=1.29 × 10⁻¹²; NPHP1, rs10173717, P=1.74 × 10⁻¹²; CADPS2, rs3757536, P=1.54 × 10⁻¹⁰; GREM2, rs12129547, P=1.69 × 10⁻¹³, among others) as well as other loci known to be associated with AD. Regions identified by pbGWAS were confirmed by subsequent individual genotyping. The pbGWAS methodology and the genes it targeted could provide important insights in determining the genetic causes of AD and other complex conditions.
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Affiliation(s)
- J I Vélez
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - S C Chandrasekharappa
- Genome Technology Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - E Henao
- Grupo de Neurociencias de Antioquia, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - A F Martinez
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - U Harper
- Genome Technology Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - M Jones
- Genome Technology Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - B D Solomon
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - L Lopez
- Grupo de Neurociencias de Antioquia, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - G Garcia
- Grupo de Neurociencias de Antioquia, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - D C Aguirre-Acevedo
- Grupo de Neurociencias de Antioquia, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - N Acosta-Baena
- Grupo de Neurociencias de Antioquia, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - J C Correa
- Escuela de Estadística, Universidad Nacional de Colombia, Sede Medellín, Medellín, Colombia
| | - C M Lopera-Gómez
- Escuela de Estadística, Universidad Nacional de Colombia, Sede Medellín, Medellín, Colombia
| | - M C Jaramillo-Elorza
- Escuela de Estadística, Universidad Nacional de Colombia, Sede Medellín, Medellín, Colombia
| | - D Rivera
- Grupo de Neurociencias de Antioquia, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - K S Kosik
- Neuroscience Research Institute, University of California at Santa Barbara, Santa Barbara, CA, USA
| | - N J Schork
- Department of Biostatistics and Bioinformatics, The Scripps Research Institute, La Jolla, CA, USA
| | - J M Swanson
- Department of Psychiatry, Florida International University, Miami, FL, USA,Child Development Center, University of California at Irvine, Irvine, CA, USA
| | - F Lopera
- Grupo de Neurociencias de Antioquia, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia
| | - M Arcos-Burgos
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA,Grupo de Neurociencias de Antioquia, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia,Translational Genomics Group, Department of Translational Medicine, John Curtin School of Medical Research, ANU College of Medicine, Biology & Environment, The Australian National University, Canberra, ACT, Australia,Translational Genomics Group, ANU College of Medicine, Biology & Environment, John Curtin School of Medical Research, The Australian National University, Building 131 Garran Road, Canberra, ACT 0200, Australia. E-mail:
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5
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Jain M, Vélez JI, Acosta MT, Palacio LG, Balog J, Roessler E, Pineda D, Londoño AC, Palacio JD, Arbelaez A, Lopera F, Elia J, Hakonarson H, Seitz C, Freitag CM, Palmason H, Meyer J, Romanos M, Walitza S, Hemminger U, Warnke A, Romanos J, Renner T, Jacob C, Lesch KP, Swanson J, Castellanos FX, Bailey-Wilson JE, Arcos-Burgos M, Muenke M. A cooperative interaction between LPHN3 and 11q doubles the risk for ADHD. Mol Psychiatry 2012; 17:741-7. [PMID: 21606926 PMCID: PMC3382263 DOI: 10.1038/mp.2011.59] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In previous studies of a genetic isolate, we identified significant linkage of attention deficit hyperactivity disorder (ADHD) to 4q, 5q, 8q, 11q and 17p. The existence of unique large size families linked to multiple regions, and the fact that these families came from an isolated population, we hypothesized that two-locus interaction contributions to ADHD were plausible. Several analytical models converged to show significant interaction between 4q and 11q (P<1 × 10(-8)) and 11q and 17p (P<1 × 10(-6)). As we have identified that common variants of the LPHN3 gene were responsible for the 4q linkage signal, we focused on 4q-11q interaction to determine that single-nucleotide polymorphisms (SNPs) harbored in the LPHN3 gene interact with SNPs spanning the 11q region that contains DRD2 and NCAM1 genes, to double the risk of developing ADHD. This interaction not only explains genetic effects much better than taking each of these loci effects by separated but also differences in brain metabolism as depicted by proton magnetic resonance spectroscopy data and pharmacogenetic response to stimulant medication. These findings not only add information about how high order genetic interactions might be implicated in conferring susceptibility to develop ADHD but also show that future studies of the effects of genetic interactions on ADHD clinical information will help to shape predictive models of individual outcome.
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Affiliation(s)
- M Jain
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - J I Vélez
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - M T Acosta
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - L G Palacio
- Neurosciences Group, University of Antioquia, Medellín, Colombia
| | - J Balog
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - E Roessler
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - D Pineda
- Neurosciences Group, University of Antioquia, Medellín, Colombia
| | - A C Londoño
- Neurosciences Group, University of Antioquia, Medellín, Colombia
| | - J D Palacio
- Neurosciences Group, University of Antioquia, Medellín, Colombia
| | - A Arbelaez
- Neurosciences Group, University of Antioquia, Medellín, Colombia
| | - F Lopera
- Neurosciences Group, University of Antioquia, Medellín, Colombia
| | - J Elia
- The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - H Hakonarson
- The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - C Seitz
- Department of Child and Adolescent Psychiatry, Saarland University Hospital, Homburg, Saar, Germany
| | - C M Freitag
- Department of Child and Adolescent Psychiatry, Saarland University Hospital, Homburg, Saar, Germany
| | - H Palmason
- Graduate School for Psychobiology, Division of Neuro-Behavioral Genetics, University of Trier, Trier, Germany
| | - J Meyer
- Graduate School for Psychobiology, Division of Neuro-Behavioral Genetics, University of Trier, Trier, Germany
| | - M Romanos
- Department of Child and Adolescent Psychiatry and Psychotherapy, University of Würzburg, Würzburg, Germany
| | - S Walitza
- Department of Child and Adolescent Psychiatry and Psychotherapy, University of Würzburg, Würzburg, Germany
| | - U Hemminger
- Department of Child and Adolescent Psychiatry and Psychotherapy, University of Würzburg, Würzburg, Germany
| | - A Warnke
- Department of Child and Adolescent Psychiatry and Psychotherapy, University of Würzburg, Würzburg, Germany
| | - J Romanos
- Department of Psychiatry and Psychotherapy, University of Würzburg, Würzburg, Germany
| | - T Renner
- Department of Child and Adolescent Psychiatry and Psychotherapy, University of Würzburg, Würzburg, Germany,Department of Psychiatry and Psychotherapy, University of Würzburg, Würzburg, Germany,Molecular and Psychobiology, University of Würzburg, Würzburg, Germany
| | - C Jacob
- Department of Psychiatry and Psychotherapy, University of Würzburg, Würzburg, Germany
| | - K-P Lesch
- Department of Child and Adolescent Psychiatry and Psychotherapy, University of Würzburg, Würzburg, Germany,Department of Psychiatry and Psychotherapy, University of Würzburg, Würzburg, Germany,Molecular and Psychobiology, University of Würzburg, Würzburg, Germany
| | - J Swanson
- UCI Child Development Center, University of California, Irvine, CA, USA
| | | | - J E Bailey-Wilson
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - M Arcos-Burgos
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA,Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Building 35, Room 1B-209, Bethesda, MD 20892-3717, USA. E-mails: and
| | - M Muenke
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA,Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Building 35, Room 1B-209, Bethesda, MD 20892-3717, USA. E-mails: and
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6
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Keaton AA, Solomon BD, Kauvar EF, El-Jaick KB, Gropman AL, Zafer Y, Meck JM, Bale SJ, Grange DK, Haddad BR, Gowans GC, Clegg NJ, Delgado MR, Hahn JS, Pineda-Alvarez DE, Lacbawan F, Vélez JI, Roessler E, Muenke M. TGIF Mutations in Human Holoprosencephaly: Correlation between Genotype and Phenotype. Mol Syndromol 2011; 1:211-222. [PMID: 22125506 DOI: 10.1159/000328203] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/21/2011] [Indexed: 11/19/2022] Open
Abstract
Holoprosencephaly (HPE), which results from failed or incomplete midline forebrain division early in gestation, is the most common forebrain malformation. The etiology of HPE is complex and multifactorial. To date, at least 12 HPE-associated genes have been identified, including TGIF (transforming growth factor beta-induced factor), located on chromosome 18p11.3. TGIF encodes a transcriptional repressor of retinoid responses involved in TGF-β signaling regulation, including Nodal signaling. TGIF mutations are reported in approximately 1-2% of patients with non-syndromic, non-chromosomal HPE. We combined data from our comprehensive studies of HPE with a literature search for all individuals with HPE and evidence of mutations affecting TGIF in order to establish the genotypic and phenotypic range. We describe 2 groups of patients: 34 with intragenic mutations and 21 with deletions of TGIF. These individuals, which were ascertained from our research group, in collaboration with other centers, and through a literature search, include 38 probands and 17 mutation-positive relatives. The majority of intragenic mutations occur in the TGIF homeodomain. Patients with mutations affecting TGIFrecapitulate the entire phenotypic spectrum observed in non-chromosomal, non-syndromic HPE. We identified a statistically significant difference between the 2 groups with respect to inheritance, as TGIF deletions were more likely to be de novo in comparison to TGIF mutations (χ(2) ((2)) = 6.97, p(permutated) = 0.0356). In addition, patients with TGIF deletions were also found to more commonly present with manifestations beyond the craniofacial and neuroanatomical features associated with HPE (p = 0.0030). These findings highlight differences in patients with intragenic mutations versus deletions affecting TGIF, and draw attention to the homeodomain region, which appears to be particularly relevant to HPE. These results may be useful for genetic counseling of affected patients.
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Affiliation(s)
- A A Keaton
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, Md
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Lacbawan F, Solomon BD, Roessler E, El-Jaick K, Domené S, Vélez JI, Zhou N, Hadley D, Balog JZ, Long R, Fryer A, Smith W, Omar S, McLean SD, Clarkson K, Lichty A, Clegg NJ, Delgado MR, Levey E, Stashinko E, Potocki L, Vanallen MI, Clayton-Smith J, Donnai D, Bianchi DW, Juliusson PB, Njølstad PR, Brunner HG, Carey JC, Hehr U, Müsebeck J, Wieacker PF, Postra A, Hennekam RCM, van den Boogaard MJH, van Haeringen A, Paulussen A, Herbergs J, Schrander-Stumpel CTRM, Janecke AR, Chitayat D, Hahn J, McDonald-McGinn DM, Zackai EH, Dobyns WB, Muenke M. Clinical spectrum of SIX3-associated mutations in holoprosencephaly: correlation between genotype, phenotype and function. J Med Genet 2009; 46:389-98. [PMID: 19346217 PMCID: PMC3510661 DOI: 10.1136/jmg.2008.063818] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Holoprosencephaly (HPE) is the most common structural malformation of the human forebrain. There are several important HPE mutational target genes, including the transcription factor SIX3, which encodes an early regulator of Shh, Wnt, Bmp and Nodal signalling expressed in the developing forebrain and eyes of all vertebrates. OBJECTIVE To characterise genetic and clinical findings in patients with SIX3 mutations. METHODS Patients with HPE and their family members were tested for mutations in HPE-associated genes and the genetic and clinical findings, including those for additional cases found in the literature, were analysed. The results were correlated with a mutation-specific functional assay in zebrafish. RESULTS In a cohort of patients (n = 800) with HPE, SIX3 mutations were found in 4.7% of probands and additional cases were found through testing of relatives. In total, 138 cases of HPE were identified, 59 of whom had not previously been clinically presented. Mutations in SIX3 result in more severe HPE than in other cases of non-chromosomal, non-syndromic HPE. An over-representation of severe HPE was found in patients whose mutations confer greater loss of function, as measured by the functional zebrafish assay. The gender ratio in this combined set of patients was 1.5:1 (F:M) and maternal inheritance was almost twice as common as paternal. About 14% of SIX3 mutations in probands occur de novo. There is a wide intrafamilial clinical range of features and classical penetrance is estimated to be at least 62%. CONCLUSIONS Our data suggest that SIX3 mutations result in relatively severe HPE and that there is a genotype-phenotype correlation, as shown by functional studies using animal models.
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Affiliation(s)
- F Lacbawan
- Medical Genetics Branch, National Human Genome Research Institute, National Institutes of Health, 35 Convent Drive, MSC 3717, Building 35, Room 1B-203, Bethesda, MD 20892-3717, USA
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