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Abstract #98542 Published in IGR 22-4
Detection of a novel PAX6 variant in a Chinese family with multiple ocular abnormalities
Ouyang J; Cai Z; Guo Y; Nie F; Cao M; Duan XBMC Ophthalmology 2022; 22: 28
BACKGROUND: Aniridia is a congenital, panocular disease that can affect the cornea, anterior chamber angle, iris, lens, retina and optic nerve. PAX6 loss-of-function variants are the most common cause of aniridia, and variants throughout the gene have been linked to a range of ophthalmic abnormalities. Furthermore, particular variants at a given site in PAX6 lead to distinct phenotypes. This study aimed to characterize genetic variants associated with congenital aniridia in a Chinese family. METHODS: The proband and family underwent ophthalmologic examinations. DNA was sampled from the peripheral blood of all 6 individuals, and whole-exome sequencing was performed. Sanger sequencing was used to verify the variant in this family members. RESULTS: A novel variant (c.114_119delinsAATTTCC: p.Pro39llefsTer17) in the PAX6 gene was identified in subjects II-1, III-1 and III-2, who exhibited complete aniridia and cataracts. The proband and the proband's brother also had glaucoma, high myopia, and foveal hypoplasia. CONCLUSIONS: We identified that a novel PAX6 frameshift heterozygous deletion variant is the predominant cause of aniridia in this Chinese family. TRIAL REGISTRATION: We did not perform any health-related interventions for the participants.
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