Preferred Label : Neuraminidase deficiency;
Type : Phenotype, molecular basis known;
Alternative titles and symbols : Sialidosis, type II; Mucolipidosis I; Ml I; Sialidase deficiency; Glycoprotein neuraminidase deficiency; Neug deficiency; Neuraminidase 1 deficiency; Neu deficiency; Neu1 deficiency; LIPOMUCOPOLYSACCHARIDOSIS;
Included titles and symbols : Sialidosis, type I; Cherry red spot--myoclonus syndrome; Myoclonus--cherry red spot syndrome;
Description : Sialidosis is characterized by the progressive lysosomal storage of sialidated glycopeptides
and oligosaccharides caused by a deficiency of the enzyme neuraminidase. Common to
the sialidoses is the accumulation and/or excretion of sialic acid (N-acetylneuraminic
acid) covalently linked ('bound') to a variety of oligosaccharides and/or glycoproteins.
The sialidoses are distinct from the sialurias in which there is storage and excretion
of 'free' sialic acid, rather than 'bound' sialic acid; neuraminidase activity in
sialuria is normal or elevated. Salla disease (604369) is a form of 'free' sialic
acid disease. - Classification Lowden and O'Brien (1979) provided a logical nosology
of neuraminidase deficiency into sialidosis type I and type II. Type I is the milder
form, also known as the 'normosomatic' type or the cherry red spot-myoclonus syndrome.
Sialidosis type II is the more severe form with an earlier onset, and is also known
as the 'dysmorphic' type. Type II has been subdivided into juvenile and infantile
forms. Other terms for sialidosis type II are mucolipidosis I and lipomucopolysaccharidosis.;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutation in the neuraminidase 1 gene (NEU1, 608272.0001);
Laboratory abnormalities : Proteinuria (type II, congenital); Increased urinary sialyloligosaccharides; Increased urinary sialylglycopeptides; Neuraminidase deficiency (white blood cells, fibroblasts, cultured amniotic cells);
Prefixed ID : #256550;
Origin ID : 256550;
UMLS CUI : C4282398;
Automatic exact mappings (from CISMeF team)
Currated CISMeF NLP mapping
DO Cross reference
False automatic mappings
Genes related to phenotype
HPO term(s)
ORDO concept(s)
Semantic type(s)
UMLS correspondences (same concept)
Validated automatic mappings to BTNT
Validated automatic mappings to NTBT