Metachromatic leukodystrophy (MLD) is an autosomal recessive demyelinating lysosomal storage disease caused by deficiency of lysosomal arylsulfatase A (ARSA). The enzyme defect results in the accumulation of sulfatide in the central and peripheral nervous systems and extensive white matter damage and loss of both cognitive and motor functions. Mutated PSAP gene resulting in sphingolipid activator protein B deficiency is known to cause MLD variant in which ARSA is normal.
Category
Congenital disorder of metabolism; Lysosomal storage disease
Brite
Human diseases [BR:br08402]
Congenital disorders of metabolism
Congenital disorders of lipid/glycolipid metabolism
H00127 Metachromatic leukodystrophy
Lysosomal storage diseases
H00127 Metachromatic leukodystrophy
Human diseases in ICD-11 classification [BR:br08403]
05 Endocrine, nutritional or metabolic diseases
Metabolic disorders
Inborn errors of metabolism
5C56 Lysosomal diseases
H00127 Metachromatic leukodystrophy
Kuchar L, Ledvinova J, Hrebicek M, Myskova H, Dvorakova L, Berna L, Chrastina P, Asfaw B, Elleder M, Petermoller M, Mayrhofer H, Staudt M, Krageloh-Mann I, Paton BC, Harzer K
Title
Prosaposin deficiency and saposin B deficiency (activator-deficient metachromatic leukodystrophy): report on two patients detected by analysis of urinary sphingolipids and carrying novel PSAP gene mutations.
