Journal
PEDIATRIC RESEARCH
Volume 82, Issue 5, Pages 753-758Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/pr.2017.149
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Funding
- Higher Education Commission (HEC), Islamabad, Pakistan
- Pakistan Academy of Science (PAS), Islamabad, Pakistan
- International Research Support Initiative Program (IRSIP) from HEC, Islamabad, Pakistan
- Indigenous PhD fellowship from HEC, Islamabad, Pakistan
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BACKGROUND: Osteogenesis imperfecta (OI) is a heritable bone fragility disorder usually caused by dominant variants in COL1A1 or COL1A2 genes. Over the last few years, 17 genes including 12 autosomal recessive and five autosomal dominant forms of OI, involved in various aspects of bone formation, have been identified. METHODS: Whole-exome sequencing followed by conventional Sanger sequencing was performed in a single affected individual (IV-3) in a family. RESULTS: Here, we report the clinical and genetic characterization of OI type 3 in a consanguineous family with four affected members. Clinical examinations revealed low bone density, short stature, severe vertebral compression fractures, and multiple long bone fractures in the affected members. Exome sequencing revealed a biallelic pathogenic splice acceptor site variant (c. 359-3C>G) in a wingless-type mouse mammary tumor virus integration site family 1 (WNT1) gene located on chromosome 12q13.12. CONCLUSION: We report a biallelic splice site variant underlying OI type 3 and the first case from the Pakistani population.
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