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Abstract #81368 Published in IGR 20-3
Primary congenital glaucoma due to paternal uniparental isodisomy of chromosome 2 and CYP1B1 deletion
Souzeau E; Dubowsky A; Ruddle JB; Craig JEMolecular genetics & genomic medicine 2019; 7: e774
BACKGROUND: CYP1B1 variants and deletions are the most common cause of primary congenital glaucoma (PCG). METHODS: We investigated an individual with PCG from the Australian and New Zealand Registry of Advanced Glaucoma. We performed sequencing of the CYP1B1 gene, followed by Multiplex Ligation-dependent Probe Amplification and SNP array. RESULTS: We identified a homozygous deletion of the CYP1B1 gene by Multiplex Ligation-dependent Probe Amplification and confirmed that the father was heterozygous for a CYP1B1 deletion but the mother had normal gene copy number. SNP array identified paternal uniparental isodisomy of the entire chromosome 2. CONCLUSIONS: This study is the first report of a homozygous CYP1B1 whole gene deletion due to paternal uniparental isodisomy of chromosome 2 as a cause of PCG. These results illustrate the importance of genetic testing in providing appropriate genetic counseling regarding the risks of recurrence.
Department of Ophthalmology, Flinders University, Flinders Medical Centre, Adelaide, South Australia, Australia.
Full articleClassification:
9.1.1 Congenital glaucoma, Buphthalmos (Part of: 9 Clinical forms of glaucomas > 9.1 Developmental glaucomas)
3.4.2 Gene studies (Part of: 3 Laboratory methods > 3.4 Molecular genetics)