Genetic Analysis of Classic Aniridia in Saudi Arabia
Author Information
Author(s): Khan Arif O., Aldahmesh Mohammed A., Alkuraya Fowzan S.
Primary Institution: King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia
Hypothesis
To determine the genetic and genomic alterations underlying classic aniridia in Saudi Arabia, a region with social preference for consanguineous marriage.
Conclusion
The classic aniridia phenotype in Saudi Arabia is typically caused by heterozygous PAX6 mutations, even in the setting of enhanced homozygosity from recent shared parental ancestry.
Supporting Evidence
- All 12 probands had lens opacity and foveal hypoplasia in addition to no grossly visible iris.
- Four cases were familial and all cases were products of consanguineous unions except for three.
- Heterozygous PAX6 mutations were detectable in all but two cases.
Takeaway
This study looked at kids with a rare eye condition called aniridia, finding that most had a specific gene mutation, especially in families where parents are related.
Methodology
Prospective study of consecutive patients referred to a pediatric ophthalmologist, involving genetic analysis of PAX6 and other candidate genes.
Limitations
The study may not account for all genetic variations due to the limited sample size and focus on consanguineous families.
Participant Demographics
Participants included 12 probands aged 4 months to 25 years, with a mix of familial and sporadic cases.
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