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Microdeletions of ELP4 Are Associated with Language Impairment, Autism Spectrum Disorder, and Mental Retardation. | LitMetric

AI Article Synopsis

  • Copy-number variations (CNVs) are linked to neurodevelopmental disorders and can manifest in various ways; this study focused on the ELP4-PAX6 locus in a large sample of individuals with neurodevelopmental conditions compared to healthy controls.
  • The research identified several cases with ELP4 deletions and associated conditions such as language impairment, developmental delay, autism, and epilepsy, indicating a potential connection between these deletions and neurodevelopmental issues.
  • A significant excess of CNVs at ELP4 was found in patients compared to controls, suggesting that ELP4 deletions may be pathogenic and increase the risk of a range of neurodevelopmental disorders.

Article Abstract

Copy-number variations (CNVs) are important in the aetiology of neurodevelopmental disorders and show broad phenotypic manifestations. We compared the presence of small CNVs disrupting the ELP4-PAX6 locus in 4,092 UK individuals with a range of neurodevelopmental conditions, clinically referred for array comparative genomic hybridization, with WTCCC controls (n = 4,783). The phenotypic analysis was then extended using the DECIPHER database. We followed up association using an autism patient cohort (n = 3,143) compared with six additional control groups (n = 6,469). In the clinical discovery series, we identified eight cases with ELP4 deletions, and one with a partial duplication of ELP4 and PAX6. These cases were referred for neurological phenotypes including language impairment, developmental delay, autism, and epilepsy. Six further cases with a primary diagnosis of autism spectrum disorder (ASD) and similar secondary phenotypes were identified with ELP4 deletions, as well as another six (out of nine) with neurodevelopmental phenotypes from DECIPHER. CNVs at ELP4 were only present in 1/11,252 controls. We found a significant excess of CNVs in discovery cases compared with controls, P = 7.5 × 10(-3) , as well as for autism, P = 2.7 × 10(-3) . Our results suggest that ELP4 deletions are highly likely to be pathogenic, predisposing to a range of neurodevelopmental phenotypes from ASD to language impairment and epilepsy.

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Source
http://dx.doi.org/10.1002/humu.22816DOI Listing

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