Journal
HUMAN MUTATION
Volume 19, Issue 5, Pages 465-478Publisher
WILEY
DOI: 10.1002/humu.10066
Keywords
pseudoachondroplasia; PSACH; multiple epiphyseal dysplasia; MED; cartilage oligomeric matrix protein; COMP; type IX collagen COL9; matrilin-3; MATN3; solute carrier member 26, member 2; SLC26A2; mutation analysis; genotype-phenotype correlation
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Pseudoachondroplasia (PSACH) and multiple epiphyseal dysplasia (MED) constitute a bone dysplasia family, which is both genetically and phenotypically heterogeneous. The disease spectrum ranges from mild MED, which manifests with pain and stiffness in the joints and delayed and irregular ossification of the epiphyses, to the more severe PSACH, which is characterized by marked short stature, deformity of the legs, and ligamentous laxity. PSACH is almost exclusively caused by mutations in cartilage oligomeric matrix protein (COMP) whereas various forms of MED are caused by mutations in the genes encoding COMP, type IX collagen (COL9A1, COL9A2, and COL9A3), matrilin,3 (MATN3), and solute carrier member 26, member 2 gene (SLC26A2). In this review we discuss specific disease,causing mutations and the clustering of these mutations in functionally and structurally important regions of the respective gene products, genotype to phenotype correlations, and the diagnostic relevance of mutation screening in these osteochondrodysplasias.
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