Importance and usage of chromosomal microarray analysis in diagnosing intellectual disability, global developmental delay, and autism; And discovering new loci for these disorders 06 Biological Sciences 0604 Genetics

Ceylan A. C., Citli Ş., Erdem H. B., Sahin I., ACAR ARSLAN E., Erdogan M.

Molecular Cytogenetics, cilt.11, sa.1, 2018 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 11 Sayı: 1
  • Basım Tarihi: 2018
  • Doi Numarası: 10.1186/s13039-018-0402-4
  • Dergi Adı: Molecular Cytogenetics
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: 22q11.2 homozygote duplication, Chromosomal microarray, Copy number variations, Global developmental delay, Intellectual disability
  • Recep Tayyip Erdoğan Üniversitesi Adresli: Hayır

Özet

Background: Chromosomal microarray analysis is a first-stage test that is used for the diagnosis of intellectual disability and global developmental delay. Chromosomal microarray analysis can detect well-known microdeletion syndromes. It also contributes to the identification of genes that are responsible for the phenotypes in the new copy number variations. Results: Chromosomal microarray analysis was conducted on 124 patients with intellectual disability and global developmental delay. Multiplex ligation-dependent probe amplification was used for the confirmation of chromosome 22q11.2 deletion/duplication. 26 pathogenic and likely pathogenic copy number variations were detected in 23 patients (18.55%) in a group of 124 Turkish patients with intellectual disability and global developmental delay. Chromosomal microarray analysis revealed pathogenic de novo Copy number variations, such as a novel 2.9-Mb de novo deletion at 18q22 region with intellectual disability and autism spectrum disorder, and a 22q11.2 region homozygote duplication with new clinical features. Conclusion: Our data expand the spectrum of 22q11.2 region mutations, reveal new loci responsible from autism spectrum disorder and provide new insights into the genotype-phenotype correlations of intellectual disability and global developmental delay.