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GENATLAS PHENOTYPE
last update : 14-09-2013
Symbol MPS6
Location 5q13-q14.1
Name mucopolysaccharidosis, type VI
Other name(s) Maroteaux-Lamy syndrome
Corresponding gene ARSB
Main clinical features
  • striking osseous and corneal changes (like those of MPS I) without intellectual impairment until late, only (or predominantly) chondroitin sulfate B excretion in the urine
  • severity variable, but usually include short stature, hepatosplenomegaly, dysostosis multiplex, stiff joints, corneal clouding, cardiac abnormalities, and facial dysmorphism
  • classic form has severe physical changes, including hydrocephalus due to meningeal involvement, leading to death in the teens as a rule
  • the mildest form characterized by short stature, corneal clouding, Legg-Perthes-like disease of the hips, and aortic stenosis
  • azurophilic cytoplasmic inclusions in polymorphonuclear leukocytes, increased urinary excretion of chondroitin sulfate, fibroblasts had only 2 to 3p100 residual arylsulfatase B activity
  • Genetic determination autosomal recessive
    Function/system disorder metabolism/lysosomal
    Type disease
    Mechanism(s)
    Gene mutationChromosome rearrangementEffectComments
    missense     45 identified mutations predominantly non recurrent missense mutations
    Remark(s)