Developmental perspectives on copy number abnormalities of the 22q11.2 region

Clin Genet. 2010 Sep;78(3):201-18. doi: 10.1111/j.1399-0004.2010.01456.x. Epub 2010 Apr 23.

Abstract

The 22q11.2 chromosomal landscape predisposes to genomic rearrangements that are associated with a variety of clinical phenotypes. The most well known of these include the 22q11.2 deletion and Cat-eye syndromes (CES), but more recently other copy number abnormalities have been recognised, especially with increased use of microarrays in the investigation of patients with congenital malformations or cognitive impairment. In addition, mutations in the TBX1 gene have been found in patients with phenotypes reminiscent of 22q11.2 syndromes. Recent advances in our understanding of 22q11.2 genes and their interactions provide insight into the mechanisms underlying the phenotypic variability of the 22q11.2 syndromes, and suggest a possible common developmental pathway perturbed by copy number abnormalities of this locus.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Abnormalities, Multiple / genetics*
  • Abnormalities, Multiple / pathology
  • Animals
  • Chromosome Aberrations*
  • Chromosomes, Human, Pair 22 / genetics*
  • Craniofacial Abnormalities
  • Gene Expression Regulation, Developmental
  • Humans
  • Mutation
  • Syndrome
  • T-Box Domain Proteins / genetics

Substances

  • T-Box Domain Proteins
  • TBX1 protein, human