Genetic analysis of consanguineous families presenting with congenital ocular defects

Ehsan Ullah, Muhammad Arif Nadeem Saqib, Sundus Sajid, Neelam Shah, Muhammad Zubair, Muzammil Ahmad Khan, Iftikhar Ahmed, Ghazanfar Ali, Atanu Kumar Dutta, Sumita Danda, Richard Lao, Paul Ling-Fung Tang, Pui yan Kwok, Muhammad Ansar, Anne Slavotinek

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12 Citations (Scopus)

Abstract

Anophthalmia and microphthalmia (A/M) are a group of rare developmental disorders that affect the size of the ocular globe. A/M may present as the sole clinical feature, but are also frequently found in a variety of syndromes. A/M is genetically heterogeneous and can be caused by chromosomal aberrations, copy number variations and single gene mutations. To date, A/M has been caused by mutations in at least 20 genes that show different modes of inheritance. In this study, we enrolled eight consanguineous families with A/M, including seven from Pakistan and one from India. Sanger and exome sequencing of DNA samples from these families identified three novel mutations including two mutations in the Aldehyde Dehydrogenase 1 Family Member A3 (ALDH1A3) gene, [c.1310_1311delAT; p.(Tyr437Trpfs*44) and c.964G > A; p.(Val322Met)] and a single missense mutation in Forkhead Box E3 (FOXE3) gene, [c.289A > G p.(Ile97Val)]. Additionally two previously reported mutations were identified in FOXE3 and in Visual System Homeobox 2 (VSX2). This is the first comprehensive study on families with A/M from the Indian subcontinent which provides further evidence for the involvement of known genes with novel and recurrent mutations.

Original languageEnglish
Pages (from-to)163-171
Number of pages9
JournalExperimental Eye Research
Volume146
DOIs
Publication statusPublished - 1 May 2016
Externally publishedYes

Keywords

  • ALDH1A3
  • Anophthalmia
  • Autosomal recessive
  • Consanguinity
  • FOXE3
  • Microphthalmia
  • VSX2
  • Whole exome sequencing

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