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Fragile Bones Secondary to SMURF1 Gene Duplication
Rawan Al-Rawi1, Ali Al-Beshri2,3, Fady M Mikhail3
1Department of Pediatrics, University of Alabama at Birmingham, 1601 4th Avenue South, 1600 7th AVE S, Birmingham, AL, 35233-1711, USA. rawan.z.alrawi@gmail.com.
Calcified Tissue International
|February 11, 2020
Summary
A genetic microduplication involving the SMURF1 gene caused osteoporosis in a child, linking SMURF1 to bone density and developmental issues. This finding highlights SMURF1
Area of Science:
- Genetics
- Molecular Biology
- Pediatrics
- Endocrinology
Background:
- Smad Ubiquitin Regulatory Factor-1 (SMURF1) gene negatively regulates osteoblast function and bone morphogenetic protein response in mice.
- SMURF1 has been implicated in tumorigenesis due to interference with apoptosis signals.
- Previous studies in mice suggest a role for SMURF1 in bone metabolism and cancer.
Observation:
- A 10-year-old girl presented with fractures and low bone mineral density.
- She had a history of severe developmental delay, infantile seizures, and B-cell lymphoma.
- Array comparative genomic hybridization identified a pathogenic microduplication in chromosome 7 (7q21.3q22.1) encompassing the SMURF1 gene.
Findings:
- The patient's clinical features align with phenotypes observed in mice with excess Smurf1 mutations.
- This case represents the first description of childhood osteoporosis secondary to a SMURF1 gene microduplication.
Implications:
- This study highlights the critical role of SMURF1 gene dosage in pediatric bone health.
- The findings suggest a potential link between SMURF1 gene microduplications and developmental abnormalities.
- Further research into SMURF1's function may offer new therapeutic targets for bone disorders and related conditions.
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