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• W2933586548 abstract "Background Genetic polymorphisms of the dopamine transporter gene (DAT1) and perinatal complications associated with poor oxygenation are risk factors for attentional problems in childhood and may show interactive effects. Methods We created a novel expression-based polygenic risk score (ePRS) reflecting variations in the function of the DAT1 gene network (ePRS-DAT1) in the prefrontal cortex and explored the effects of its interaction with perinatal hypoxic-ischemic–associated conditions on cognitive flexibility and brain gray matter density in healthy children from two birth cohorts—MAVAN from Canada (n = 139 boys and girls) and GUSTO from Singapore (n = 312 boys and girls). Results A history of exposure to several perinatal hypoxic-ischemic–associated conditions was associated with impaired cognitive flexibility only in the high-ePRS group, suggesting that variation in the prefrontal cortex expression of genes involved in dopamine reuptake is associated with differences in this behavior. Interestingly, this result was observed in both ethnically distinct birth cohorts. Additionally, parallel independent component analysis (MAVAN cohort, n = 40 children) demonstrated relationships between single nucleotide polymorphism–based ePRS and gray matter density in areas involved in executive (cortical regions) and integrative (bilateral thalamus and putamen) functions, and these relationships differ in children from high and low exposure to hypoxic-ischemic–associated conditions. Conclusions These findings reveal that the impact of conditions associated with hypoxia-ischemia on brain development and executive functions is moderated by genotypes associated with dopamine signaling in the prefrontal cortex. We discuss the potential impact of innovative genomic and environmental measures for the identification of children at high risk for impaired executive functions." @default.
• W2933586548 created "2019-04-11" @default.
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• W2933586548 date "2019-10-01" @default.
• W2933586548 modified "2023-10-02" @default.
• W2933586548 title "Prefrontal Cortex Dopamine Transporter Gene Network Moderates the Effect of Perinatal Hypoxic-Ischemic Conditions on Cognitive Flexibility and Brain Gray Matter Density in Children" @default.
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• W2933586548 doi "https://doi.org/10.1016/j.biopsych.2019.03.983" @default.
• W2933586548 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31142432" @default.
• W2933586548 hasPublicationYear "2019" @default.
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