SciELO - Scientific Electronic Library Online

vol.34 número2Mendelian breeding units versus standard sampling strategies: mitochondrial DNA variation in southwest SardiniaRUNX2 mutations in Taiwanese patients with cleidocranial dysplasia índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados




Links relacionados


Genetics and Molecular Biology

versión impresa ISSN 1415-4757


SUN, Luning et al. Three novel α-L-iduronidase mutations in 10 unrelated Chinese mucopolysaccharidosis type I families. Genet. Mol. Biol. [online]. 2011, vol.34, n.2, pp.195-200.  Epub 01-Abr-2011. ISSN 1415-4757.

Mucopolysaccharidosis type I (MPS I) arises from a deficiency in the α-L-iduronidase (IDUA) enzyme. Although the clinical spectrum in MPS I patients is continuous, it was possible to recognize 3 phenotypes reflecting the severity of symptoms, viz., the Hurler, Scheie and Hurler/Scheie syndromes. In this study, 10 unrelated Chinese MPS I families (nine Hurler and one Hurler/Scheie) were investigated, and 16 mutant alleles were identified. Three novel mutations in IDUA genes, one missense p.R363H (c.1088G > A) and two splice-site mutations (c.1190-1G > A and c.792+1G > T), were found. Notably, 45% (nine out of 20) and 30% (six out of 20) of the mutant alleles in the 10 families studied were c.1190-1G > A and c.792+1G > T, respectively. The novel missense mutation p.R363H was transiently expressed in CHO cells, and showed retention of 2.3% IDUA activity. Neither p.W402X nor p.Q70X associated with the Hurler phenotype, or even p.R89Q associated with the Scheie phenotype, was found in this group. Finally, it was noted that the Chinese MPS I patients proved to be characterized with a unique set of IDUA gene mutations, not only entirely different from those encountered among Europeans and Americans, but also apparently not even the same as those found in other Asian countries.

Palabras clave : mucopolysaccharidosis type I; α-L-iduronidase; mutation; polymorphism.

        · texto en Inglés     · Inglés ( pdf epdf )


Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons