Preferred Label : Gm1-gangliosidosis, type I;
Symbol : GM1G1;
Type : Phenotype, molecular basis known;
Alternative titles and symbols : Gangliosidosis, generalized gm1, type I; Gangliosidosis, generalized gm1, infantile form; Gangliosidosis, generalized gm1, type 1; Beta-galactosidase-1 deficiency; Glb1 deficiency;
Included titles and symbols : Gm1-gangliosidosis, type I, with cardiac involvement; Gangliosidosis, generalized gm1, type I, with cardiac involvement;
Description : GM1-Gangliosidosis is an autosomal recessive lysosomal storage disease characterized
by accumulation of ganglioside substrates in lysosomes. Clinically, patients show
variable degrees of neurodegeneration and skeletal abnormalities. There are 3 main
clinical variants categorized by severity and variable residual beta-galactosidase
activity. Type I, or infantile form, shows rapid psychomotor deterioration beginning
within 6 months of birth, generalized central nervous system involvement, hepatosplenomegaly,
facial dysmorphism, macular cherry-red spots, skeletal dysplasia, and early death.
Type II, or late-infantile/juvenile form (230600), has onset between 7 months and
3 years, shows generalized central nervous system involvement with psychomotor deterioration,
seizures, localized skeletal involvement, and survival into childhood. Hepatosplenomegaly
and cherry-red spots are usually not present. Type III, or adult/chronic form (230650),
shows onset from 3 to 30 years and is characterized by localized skeletal involvement
and localized central nervous system involvement, such as dystonia or gait or speech
disturbance. There is an inverse correlation between disease severity and residual
enzyme activity (Suzuki et al., 2001). See also Morquio B disease (253010), an allelic
disorder with skeletal anomalies and no neurologic involvement. The GM2-gangliosidoses
include Tay-Sachs disease (272800) and Sandhoff disease (268800).;
Inheritance : Autosomal recessive;
Molecular basis : Caused by mutation in the beta-1 galactosidase gene (GLB1, 611458.0001);
Prefixed ID : #230500;
Origin ID : 230500;
UMLS CUI : C0268271;
Automatic exact mappings (from CISMeF team)
Broader ORDO disease(s)
Currated CISMeF NLP mapping
DO Cross reference
Genes related to phenotype
HPO term(s)
Not associated HPO term(s)
ORDO concept(s)
Semantic type(s)
UMLS correspondences (same concept)
Validated automatic mappings to NTBT