Mutations in ARID2 are associated with intellectual disabilities

Neurogenetics. 2015 Oct;16(4):307-14. doi: 10.1007/s10048-015-0454-0. Epub 2015 Aug 4.


The etiology of intellectual disabilities (ID) remains unknown for the majority of patients. Due to reduced reproductive fitness in many individuals with ID, de novo mutations account for a significant portion of severe ID. The ATP-dependent SWI/SNF chromatin modifier has been linked with neurodevelopmental disorders including ID and autism. ARID2 is an intrinsic component of polybromo-associated BAF (PBAF), the SWI/SNF subcomplex. In this study, we used clinical whole exome sequencing (WES) in proband-parent-trios to identify the etiology of ID. We identified four independent, novel, loss of function variants in ARID2 gene in four patients, three of which were confirmed to be de novo. The patients all have ID and share other clinical characteristics including attention deficit hyperactivity disorder, short stature, dysmorphic facial features, and Wormian bones. All four novel variants are predicted to lead to a premature termination with the loss of the two conservative zinc finger motifs. This is the first report of mutations in ARID2 associated with developmental delay and ID.

Keywords: ARID2; De novo mutations; Intellectual disabilities; SWI/SNF chromatin modifier; Whole exome sequencing.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Child
  • Developmental Disabilities / genetics*
  • Exome
  • Female
  • Humans
  • Intellectual Disability / genetics*
  • Male
  • Mutation*
  • Transcription Factors / genetics*


  • ARID2 protein, human
  • Transcription Factors