PAX6 molecular analysis and genotype-phenotype correlations in families with aniridia from Australasia and Southeast Asia

Emmanuelle Souzeau, Adam Rudkin, Andrew Dubowsky, Robert Casson, James Muecke, Erica Mancel, Mark Whiting, Richard Mills, Kathryn Burdon, Jamie Craig

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Purpose: Aniridia is a congenital disorder caused by variants in the PAX6 gene. In this study, we assessed the involvement of PAX6 in patients with aniridia from Australasia and Southeast Asia. Methods: Twenty-nine individuals with aniridia from 18 families originating from Australia, New Caledonia, Cambodia, Sri Lanka, and Bhutan were included. The PAX6 gene was investigated for sequence variants and analyzed for deletions with multiplex ligation-dependent probe amplification. Results: We identified 11 sequence variants and six chromosomal deletions, including one in mosaic. Four deleterious sequence variants were novel: p.(Pro81HisfsTer12), p.(Gln274Ter), p.(Ile29Thr), and p.(Met1?). Ocular complications were associated with a progressive loss of visual function as shown by a visual acuity = 1.00 logMAR reported in 65% of eyes. The prevalence of keratopathy was statistically significantly higher in the Australasian cohort (78.6%) compared with the Southeast Asian cohort (9.1%, p=0.002). Variants resulting in protein truncating codons displayed limited genotype-phenotype correlations compared with other variants. Conclusions: PAX6 variants and deletions were identified in 94% of patients with aniridia from Australasia and Southeast Asia. This study is the first report of aniridia and variations in PAX6 in individuals from Cambodia, Sri Lanka, Bhutan, and New Caledonia, and the largest cohort from Australia.

Original languageEnglish
Pages (from-to)261-273
Number of pages13
JournalMolecular Vision
Volume24
Publication statusPublished - 2018

Fingerprint Dive into the research topics of 'PAX6 molecular analysis and genotype-phenotype correlations in families with aniridia from Australasia and Southeast Asia'. Together they form a unique fingerprint.

  • Cite this