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- Title
FGFR3 gene mutation plus GRB10 gene duplication in a patient with achondroplasia plus growth delay with prenatal onset.
- Authors
Haiming Yuan; Linhuan Huang; Xizi Hu; Qian Li; Xiaofang Sun; Yingjun Xie; Shu Kong; Xiaoman Wang; Yuan, Haiming; Huang, Linhuan; Hu, Xizi; Li, Qian; Sun, Xiaofang; Xie, Yingjun; Kong, Shu; Wang, Xiaoman
- Abstract
<bold>Background: </bold>Achondroplasia is a well-defined and common bone dysplasia. Genotype- and phenotype-level correlations have been found between the clinical symptoms of achondroplasia and achondroplasia-specific FGFR3 mutations.<bold>Result: </bold>A 2-year-old boy with clinical features consistent with achondroplasia and Silver-Russell syndrome-like symptoms was found to carry a mutation in the fibroblast growth factor receptor-3 (FGFR3) gene at c.1138G > A (p.Gly380Arg) and a de novo 574 kb duplication at chromosome 7p12.1 that involved the entire growth-factor receptor bound protein 10 (GRB10) gene. Using quantitative real-time PCR analysis, GRB10 was over-expressed, and, using enzyme-linked immunosorbent assays for IGF1 and IGF-binding protein-3 (IGFBP3), we found that IGF1 and IGFBP3 were low-expressed in this patient.<bold>Conclusions: </bold>We demonstrate that a combination of uncommon, rare and exceptional molecular defects related to the molecular bases of particular birth defects can be analyzed and diagnosed to potentially explain the observed variability in the combination of molecular defects.
- Subjects
GENETIC mutation; CHROMOSOME duplication; GROWTH factors; FIBROBLAST growth factor receptors; ACHONDROPLASIA; GENETIC overexpression; SILVER-Russell syndrome; CELL receptors; COMPARATIVE studies; RESEARCH methodology; MEDICAL cooperation; RESEARCH; PHENOTYPES; EVALUATION research; GENOTYPES
- Publication
Orphanet Journal of Rare Diseases, 2016, Vol 11, p1
- ISSN
1750-1172
- Publication type
journal article
- DOI
10.1186/s13023-016-0465-4