Exome sequencing in patients with microphthalmia, anophthalmia, and coloboma (MAC) from a consanguineous population

Farrah Islam, Stephanie Htun, Li Wen Lai, Max Krall, Menitha Poranki, Pierre Marie Martin, Nara Sobreira, Elizabeth S. Wohler, Jingwei Yu, Anthony T. Moore, Anne M. Slavotinek

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Next-generation sequencing strategies have resulted in mutation detection rates of 21% to 61% in small cohorts of patients with microphthalmia, anophthalmia and coloboma (MAC), but despite progress in identifying novel causative genes, many patients remain without a genetic diagnosis. We studied a cohort of 19 patients with MAC who were ascertained from a population with high rates of consanguinity. Using single nucleotide polymorphism (SNP) arrays and whole exome sequencing (WES), we identified one pathogenic variant in TENM3 in a patient with cataracts in addition to MAC. We also detected novel variants of unknown significance in genes that have previously been associated with MAC, including KIF26B, MICU1 and CDON, and identified variants in candidate genes for MAC from the Wnt signaling pathway, comprising LRP6, WNT2B and IQGAP1, but our findings do not prove causality. Plausible variants were not found for many of the cases, indicating that our current understanding of the pathogenesis of MAC, a highly heterogeneous group of ocular defects, remains incomplete.

Original languageEnglish (US)
Pages (from-to)499-506
Number of pages8
JournalClinical Genetics
Volume98
Issue number5
DOIs
StatePublished - Nov 1 2020

Keywords

  • Anophthalmia
  • cataract
  • CDON
  • Coloboma
  • Microphthalmia
  • TENM3

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

Cite this