MUTATIONS IN THE EXT1 AND EXT2 GENES IN SPANISH PATIENTS WITH MULTIPLE OSTEOCHONDROMAS

• Autores: P. Sarrión; A.Sangorrin; R. Urreizti ; A. Delgado ; R. Artuch ; L. Martorell ; J. Armstrong ; J, Anton; F.Torner ; M.A. Villaseca; J.Nevado ; P.Lapunzina ; C.G. Asteggiano; S. Balcells; D. Grinberg
• Año de publicación: 2013
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: Multiple osteochondromas; METABOLIC DISORDERS; Bone tumours; EXT genes
• Institución: Universidad Nacional de Córdoba

Multiple osteochondromas is an autosomal dominant skeletal disorder characterized by the  formation of multiple cartilage-capped tumours. Two causal genes have been identified, EXT1 and EXT2, which account for 65% and 30% of cases, respectively. We have undertaken a mutation analysis of the EXT1 and EXT2 genes in 39 unrelated Spanish patients, most of them with moderate phenotype, and looked for genotype-phenotype correlations.Wefound the mutant allele in 37 patients, 29 inEXT1 and 8 inEXT2. Five of the EXT1 mutations were deletions identified by MLPA. Two cases of mosaicism were documented. We detected a lower number of exostoses in patients with missense mutation versus other kinds of mutations. In conclusion, we found a mutation in EXT1 or in EXT2 in 95% of the Spanish patients. Eighteen of the mutations were novel.

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