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Invest. clín ; 55(4): 365-370, dic. 2014. ilus
Article in English | LILACS | ID: lil-783090

ABSTRACT

Mucopolysaccharidoses are a group of lysosomal storage disorders caused by deficiency of enzymes catalyzing the degradation of glycosaminoglycans. Mucopoly-saccharidosis I can present a wide range of phenotypic characteristics with three major recognized clinical entities: Hurler and Scheie syndromes represent phenotypes at the severe and mild ends of the clinical spectrum, respectively, and the Hurler-Scheie syndrome is intermediate in phenotypic expression. These are caused by the deficiency or absence of α-L-iduronidase, essential to the metabolism of both dermatan and heparan sulfate, and it is encoded by the IDUA gene. We report the case of a 34-year-old male patient with enzymatic deficiency of α-L-iduronidase, accumulation of its substrate and a previously unreported mutation in the IDUA gene that developed a phenotype of Scheie syndrome.


Las mucopolisacaridosis son un grupo de trastornos de almacenamiento lisosomal causada por la deficiencia de enzimas que catalizan la degradación de glicosaminoglicanos. La mucopolisacaridosis tipo I puede presentar un amplio rango de características fenotípicas englobadas en tres entidades clínicas reconocidas: los síndromes de Hurler y Scheie representan los fenotipos graves y leves del espectro clínico, respectivamente y el síndrome de Hurler-Scheie intermedio en la expresión fenotípica. Estos son causados por la deficiencia o ausencia de la α-L-iduronidasa esencial para el metabolismo del dermatán y el heparán sulfato y es codificada por el gen IDUA. Se presenta el caso de paciente masculino de 34 años de edad con deficiencia enzimática de α-L-iduronidasa, acumulación de su sustrato y una mutación en el gen IDUA, no reportada previamente, que desarrolló un fenotipo del síndrome de Scheie.


Subject(s)
Adult , Humans , Male , Iduronidase/genetics , Mutation, Missense , Mucopolysaccharidosis I/genetics , Point Mutation , Amino Acid Substitution , Disease Progression , Dermatan Sulfate/urine , Exons/genetics , Glycosaminoglycans/metabolism , Heterozygote , Hand Deformities, Acquired/genetics , Introns/genetics , Magnetic Resonance Imaging , Mucopolysaccharidosis I/urine , Phenotype , Sequence Deletion , Symptom Assessment , Spinal Cord Compression/etiology , Spinal Cord Compression/pathology
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