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• W2915337987 abstract "Individual differences in cognitive function are due to a combination of heritable and non-heritable factors. A large body of evidence from clinical, cognitive, and pharmacological neuroscience implicates dopaminergic gene variants as modulators of cognitive functions. Neuroepigenetic studies demonstrate environmental factors also influence complex phenotypes by affecting gene expression regulation. To evaluate the mechanism of environmental influence on cognitive abilities, we examined if epigenetic regulation of dopaminergic genes plays a role in cognition. Using a DNA methylation profiling microarray, we used a monozygotic (MZ) twin difference design to evaluate if co-twin differences in methylation of CpG sites near six dopaminergic genes predicted differences in response inhibition and memory performance. Studying MZ twins allows us to assess if environmentally driven differences in methylation affect differences in phenotype while controlling for the influence of genotype and shared family environment. Response inhibition was assessed with the flanker task and short-term and working memory were assessed with digit span recall. We found MZ co-twin differences in DRD4 gene methylation predicted differences in short-term memory. MZ differences in COMT, DBH, DAT1, DRD1, and DRD2 gene methylation predicted differences in response inhibition. Taken together, findings suggest methylation status of dopaminergic genes may influence cognitive functions in a dissociable manner. Our results highlight the importance of the epigenome and environment, over and above the influence of genotype, in supporting complex cognitive functions." @default.
• W2915337987 created "2019-03-02" @default.
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• W2915337987 date "2019-03-04" @default.
• W2915337987 modified "2023-10-12" @default.
• W2915337987 title "Dopaminergic gene methylation is associated with cognitive performance in a childhood monozygotic twin study" @default.
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• W2915337987 doi "https://doi.org/10.1080/15592294.2019.1583032" @default.
• W2915337987 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6557595" @default.
• W2915337987 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30806146" @default.
• W2915337987 hasPublicationYear "2019" @default.
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