Journal article

Splice variant in ARX leading to loss of C-terminal region in a boy with intellectual disability and infantile onset developmental and epileptic encephalopathy

Cheryl Shoubridge, Matilda Jackson, Bronwyn Grinton, Samuel F Berkovic, Ingrid E Scheffer, Shannon Huskins, Alison Thomas, Tyson Ware

American Journal of Medical Genetics Part A | WILEY | Published : 2019

Abstract

Pathogenic variants in the X-chromosome Aristaless-related homeobox (ARX) gene contribute to intellectual disability, epilepsy, and associated comorbidities in affected males. Here, we report a novel splice variant in ARX in a family with three affected individuals. The proband had early onset developmental and epileptic encephalopathy, his brother and mother had severe and mild intellectual disability, respectively. Massively parallel sequencing identified a novel c.1449-1G>C in intron 4 of the ARX gene, predicted to abolish the splice acceptor site, retaining intron 4 and leading to a premature termination codon immediately after exon 4. As exon 5 is the last exon of the ARX gene, the prem..

View full abstract