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Genome-wide association study of motor coordination problems in ADHD identifies genes for brain and muscle function

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Abstract
Objectives. Motor coordination problems are frequent in children with attention deficit/hyperactivity disorder (ADHD). We performed a genome-wide association study to identify genes contributing to motor coordination problems, hypothesizing that the presence of such problems in children with ADHD may identify a sample of reduced genetic heterogeneity. Methods. Children with ADHD from the International Multicentre ADHD Genetic (IMAGE) study were evaluated with the Parental Account of Children's Symptoms. Genetic association testing was performed in PLINK on 890 probands with genome-wide genotyping data. Bioinformatics enrichment-analysis was performed on highly ranked findings. Further characterization of the findings was conducted in 313 Dutch IMAGE children using the Developmental Coordination Disorder Questionnaire (DCD-Q). Results. Although none of the findings reached genome-wide significance, bioinformatics analysis of the top-ranked findings revealed enrichment of genes for motor neuropathy and amyotrophic lateral sclerosis. Genes involved in neurite outgrowth and muscle function were also enriched. Among the highest ranked genes were MAP2K5, involved in restless legs syndrome, and CHD6, causing motor coordination problems in mice. Further characterization of these findings using DCD-Q subscales found nominal association for 15 SNPs. Conclusions. Our findings provide clues about the aetiology of motor coordination problems, but replication studies in independent samples are necessary.
Keywords
QUESTIONNAIRE, CHILDREN, INTERVENTION, GENETICS, ADOLESCENTS

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Chicago
Fliers, Ellen A, Alejandro Arias Vasquez, Geert Poelmans, Nanda Rommelse, Marieke Altink, Cathelijne Buschgens, Philip Asherson, et al. 2012. “Genome-wide Association Study of Motor Coordination Problems in ADHD Identifies Genes for Brain and Muscle Function.” World Journal of Biological Psychiatry 13 (3): 211–222.
APA
Fliers, E. A., Vasquez, A. A., Poelmans, G., Rommelse, N., Altink, M., Buschgens, C., Asherson, P., et al. (2012). Genome-wide association study of motor coordination problems in ADHD identifies genes for brain and muscle function. WORLD JOURNAL OF BIOLOGICAL PSYCHIATRY, 13(3), 211–222.
Vancouver
1.
Fliers EA, Vasquez AA, Poelmans G, Rommelse N, Altink M, Buschgens C, et al. Genome-wide association study of motor coordination problems in ADHD identifies genes for brain and muscle function. WORLD JOURNAL OF BIOLOGICAL PSYCHIATRY. 2012;13(3):211–22.
MLA
Fliers, Ellen A et al. “Genome-wide Association Study of Motor Coordination Problems in ADHD Identifies Genes for Brain and Muscle Function.” WORLD JOURNAL OF BIOLOGICAL PSYCHIATRY 13.3 (2012): 211–222. Print.
@article{2083669,
  abstract     = {Objectives. Motor coordination problems are frequent in children with attention deficit/hyperactivity disorder (ADHD). We performed a genome-wide association study to identify genes contributing to motor coordination problems, hypothesizing that the presence of such problems in children with ADHD may identify a sample of reduced genetic heterogeneity. Methods. Children with ADHD from the International Multicentre ADHD Genetic (IMAGE) study were evaluated with the Parental Account of Children's Symptoms. Genetic association testing was performed in PLINK on 890 probands with genome-wide genotyping data. Bioinformatics enrichment-analysis was performed on highly ranked findings. Further characterization of the findings was conducted in 313 Dutch IMAGE children using the Developmental Coordination Disorder Questionnaire (DCD-Q). Results. Although none of the findings reached genome-wide significance, bioinformatics analysis of the top-ranked findings revealed enrichment of genes for motor neuropathy and amyotrophic lateral sclerosis. Genes involved in neurite outgrowth and muscle function were also enriched. Among the highest ranked genes were MAP2K5, involved in restless legs syndrome, and CHD6, causing motor coordination problems in mice. Further characterization of these findings using DCD-Q subscales found nominal association for 15 SNPs. Conclusions. Our findings provide clues about the aetiology of motor coordination problems, but replication studies in independent samples are necessary.},
  author       = {Fliers, Ellen A and Vasquez, Alejandro Arias and Poelmans, Geert and Rommelse, Nanda and Altink, Marieke and Buschgens, Cathelijne and Asherson, Philip and Banaschewski, Tobias and Ebstein, Richard and Gill, Michael and Miranda, Ana and Mulas, Fernando and Oades, Robert D and Roeyers, Herbert and Rothenberger, Aribert and Sergeant, Joseph and Barke, Edmund and Steinhausen, Hans-Christoph and Faraone, Stephen V and Buitelaar, Jan K and Franke, Barbara},
  issn         = {1562-2975},
  journal      = {WORLD JOURNAL OF BIOLOGICAL PSYCHIATRY},
  keywords     = {QUESTIONNAIRE,CHILDREN,INTERVENTION,GENETICS,ADOLESCENTS},
  language     = {eng},
  number       = {3},
  pages        = {211--222},
  title        = {Genome-wide association study of motor coordination problems in ADHD identifies genes for brain and muscle function},
  url          = {http://dx.doi.org/10.3109/15622975.2011.560279},
  volume       = {13},
  year         = {2012},
}

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