Hypochondroplasia (MIM 146000) is a skeletal dysplasia characterized by disproportional dwarfism with rhizomelic or mesomelic shortening of the upper and lower extremities, with variable severity. Patients often have macrocephaly with normal facial features. Hypochondroplasia is a disease with autosomal dominant inheritance. In some patients it is caused by germline mutations in the FGFR3 gene, in others the cause of the disease remains unknown . The FGFR3 gene encodes a tyrosine kinase receptor. This receptor negatively regulates the conversion of cartilage to bone. FGFR3 gene mutations that cause hypochondroplasia lead to constitutive activation of the receptor and inhibit the growth of long bones. In this study, we analysed selected regions (exons) of the FGFR3 gene in 98 patients with disproportional dwarfism and clinical diagnosis of hypochondroplasia. Eighteen patients from 12 families had familial and 80 patients had sporadic form of the disease. All patients were previously tested negative for frequent germline mutations in exon 13 (codon 540) and exon 15 (codon 650). Genomic DNA was isolated from patient's peripheral blood leukocytes. The examination was conducted with the informed consent of the patient or his legal representative. We performed mutational analysis by direct sequencing of...
| Identifer | oai:union.ndltd.org:nusl.cz/oai:invenio.nusl.cz:343759 |
| Date | January 2015 |
| Creators | Janoušková, Simona |
| Contributors | Křepelová, Anna, Baxová, Alice |
| Source Sets | Czech ETDs |
| Language | Czech |
| Detected Language | English |
| Type | info:eu-repo/semantics/masterThesis |
| Rights | info:eu-repo/semantics/restrictedAccess |
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