Reduced transcript expression of genes affected by inherited and de novo CNVs in autism

European Journal of Human Genetics : EJHG
Alex S NordJon M McClellan


Individuals with autism are more likely to carry rare inherited and de novo copy number variants (CNVs). However, further research is needed to establish which CNVs are causal and the mechanisms by which these CNVs influence autism. We examined genomic DNA of children with autism (N = 41) and healthy controls (N = 367) for rare CNVs using a high-resolution array comparative genomic hybridization platform. We show that individuals with autism are more likely to harbor rare CNVs as small as ∼ 10 kb, a threshold not previously detectable, and that CNVs in cases disproportionately affect genes involved in transcription, nervous system development, and receptor activity. We also show that a subset of genes that have known or suspected allele-specific or imprinting effects and are within rare-case CNVs may undergo loss of transcript expression. In particular, expression of CNTNAP2 and ZNF214 are decreased in probands compared with their unaffected transmitting parents. Furthermore, expression of PRODH and ARID1B, two genes affected by de novo CNVs, are decreased in probands compared with controls. These results suggest that for some genes affected by CNVs in autism, reduced transcript expression may be a mechanism of pathogenesis dur...Continue Reading


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Related Concepts

Pathogenic Aspects
ARID1B protein, human
Gene Dosage
Transcription, Genetic
CNTNAP2 protein, human
Array-Based Comparative Genomic Hybridization
Autistic Disorder
PRODH gene
ARID1B gene

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