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dc.contributor.authorAltink, Marieke E.
dc.contributor.authorRommelse, Nanda N.J.
dc.contributor.authorSlaats-Willemse, Dorine I.E.
dc.contributor.authorVäsquez, Alejandro Arias
dc.contributor.authorFranke, Barbara
dc.contributor.authorBuschgens, Cathelijne J.M.
dc.contributor.authorFliers, Ellen A.
dc.contributor.authorFaraone, Stephen V.
dc.contributor.authorSergeant, Joseph A.
dc.contributor.authorOosterlaan, Jaap
dc.contributor.authorBuitelaar, Jan K.
dc.date.accessioned2021-07-12T15:22:32Z
dc.date.available2021-07-12T15:22:32Z
dc.date.issued2011-11-23
dc.identifier.issn1562-2975
dc.identifier.eissn1814-1412
dc.identifier.doi10.3109/15622975.2011.595822
dc.identifier.pii10.3109/15622975.2011.595822
dc.identifier.urihttp://hdl.handle.net/20.500.12648/1833
dc.description.abstractObjectives. Evidence suggests the involvement of the dopamine D4 receptor gene ( DRD4 ) in the pathogenesis of ADHD, but the exact mechanism is not well understood. Earlier reports on the effects of DRD4 polymorphisms on neurocognitive and neuroimaging measures are inconsistent. This study investigated the functional consequences of the 7-repeat allele of DRD4 on neurocognitive endophenotypes of ADHD in the Dutch subsample of the International Multicenter ADHD Genetics study. Methods. Participants were 350 children (5 – 11.5 years) and adolescents (11.6 – 19 years) with ADHD and their 195 non-affected siblings. An overall measure of neuropsychological functioning was derived by principal component analysis from five neurocognitive and five motor tasks. The effects of DRD4 and age were examined using Linear Mixed Model analyses. Results. The analyses were stratified for affected and non-affected participants after finding a significant three-way interaction between ADHD status, age and the 7-repeat allele. Apart from a main effect of age, a significant interaction effect of age and DRD4 was found in non-affected but not in affected participants, with non-affected adolescent carriers of the 7-repeat allele showing worse neuropsychological performance. In addition, carrying the 7-repeat allele of DRD4 was related to a significantly worse performance on verbal working memory in non-affected siblings, independent of age. Conclusions. These results might indicate that the effect of the DRD4 7-repeat allele on neuropsychological functioning is dependent on age and ADHD status.en_US
dc.language.isoenen_US
dc.publisherInforma UK Limiteden_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectDopamine receptor D4 gene , attention defi cit hyperactivity disorder , neurocognitive functioning , non-affected siblings , developmenten_US
dc.titleThe dopamine receptor D4 7-repeat allele influences neurocognitive functioning, but this effect is moderated by age and ADHD status: An exploratory studyen_US
dc.typeArticleen_US
dc.source.journaltitleThe World Journal of Biological Psychiatryen_US
dc.source.volume13
dc.source.issue4
dc.source.beginpage293
dc.source.endpage305
dc.description.versionVoRen_US
refterms.dateFOA2012-11-24T00:00:00Z
dc.description.institutionUpstate Medical Universityen_US
dc.description.departmentPsychiatryen_US
dc.description.degreelevelN/Aen_US


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Attribution-NonCommercial-NoDerivatives 4.0 International
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 International