Abstract
Rare copy-number variation (CNV) is an important source of risk for autism spectrum disorders (ASDs). We analyzed 2,446 ASD-affected families and confirmed an excess of genic deletions and duplications in affected versus control groups (1.41-fold, p = 1.0 x 10(-5)) and an increase in affected subjects carrying exonic pathogenic CNVs overlapping known loci associated with dominant or X-linked ASD and intellectual disability (odds ratio = 12.62, p = 2.7 x 10(-15), similar to 3% of ASD subjects). Pathogenic CNVs, often showing variable expressivity, included rare de novo and inherited events at 36 loci, implicating ASD-associated genes (CHD2, HDAC4, and GDI1) previously linked to other neurodevelopmental disorders, as well as other genes such as SETD5, MIR137, and HDAC9. Consistent with hypothesized gender-specific modulators, females with ASD were more likely to have highly penetrant CNVs (p = 0.017) and were also overrepresented among subjects with fragile X syndrome protein targets (p = 0.02). Genes affected by de novo CNVs and/or loss-of-function single-nucleotide variants converged on networks related to neuronal signaling and development, synapse function, and chromatin regulation.
Original language | English |
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Pages (from-to) | 677-694 |
Number of pages | 18 |
Journal | American Journal of Human Genetics |
Volume | 94 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1 May 2014 |
Keywords
- DE-NOVO MUTATIONS
- COPY NUMBER VARIANTS
- GENOME-WIDE ASSOCIATION
- FRAGILE-X-SYNDROME
- INTELLECTUAL DISABILITY
- STRUCTURAL VARIATION
- PHENOTYPE ONTOLOGY
- DELETIONS
- DUPLICATIONS
- RISK