The DYX2 locus and neurochemical signaling genes contribute to speech sound disorder and related neurocognitive domains

Genes, Brain, and Behavior
John D EicherJeffrey R Gruen

Abstract

A major milestone of child development is the acquisition and use of speech and language. Communication disorders, including speech sound disorder (SSD), can impair a child's academic, social and behavioral development. Speech sound disorder is a complex, polygenic trait with a substantial genetic component. However, specific genes that contribute to SSD remain largely unknown. To identify associated genes, we assessed the association of the DYX2 dyslexia risk locus and markers in neurochemical signaling genes (e.g., nicotinic and dopaminergic) with SSD and related endophenotypes. We first performed separate primary associations in two independent samples - Cleveland SSD (210 affected and 257 unaffected individuals in 127 families) and Denver SSD (113 affected individuals and 106 unaffected individuals in 85 families) - and then combined results by meta-analysis. DYX2 markers, specifically those in the 3' untranslated region of DCDC2 (P = 1.43 × 10(-4) ), showed the strongest associations with phonological awareness. We also observed suggestive associations of dopaminergic-related genes ANKK1 (P = 1.02 × 10(-2) ) and DRD2 (P = 9.22 × 10(-3) ) and nicotinic-related genes CHRNA3 (P = 2.51 × 10(-3) ) and BDNF (P = 8.14 × 10(-3) ) ...Continue Reading

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Citations

Sep 16, 2018·The European Journal of Neuroscience·Luiz G GuidiZoltán Molnár

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Datasets Mentioned

BETA
BV677278

Methods Mentioned

BETA
genotyping

Software Mentioned

PLINK
GFTA
GWAF
METAL
SNPSpDlite

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