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A glycogen storage disease(GSD, also glycogenosisand dextrinosis) is a metabolic disordercaused by a deficiency of an enzymeor transport proteinaffecting glycogen synthesis, glycogen breakdown, or glucose breakdown, typically in musclesand/or livercells. [1] GSD has two classes of cause: genetic and environmental.
Glycogen storage disease type I (GSD I) is an inherited disease that prevents the liver from properly breaking down stored glycogen, which is necessary to maintain adequate blood sugar levels. GSD I is divided into two main types, GSD Ia and GSD Ib, which differ in cause, presentation, and treatment. There are also possibly rarer subtypes, the ...
Clinical manifestations of glycogen storage disease type III are divided into four classes: [3] GSD IIIa, is the most common, (along with GSD IIIb) and which clinically includes muscle and liver involvement; GSD IIIb, which clinically has liver involvement but no muscle involvement; GSD IIIc which clinically affects liver and muscle.
Glycogen storage disease type II has an autosomal recessive pattern of inheritance. Pompe disease has an autosomal recessive inheritance pattern. This means the defective gene is located on an autosome , and two faulty copies of the gene—one from each parent—are required to be born with the disorder.
Glycogen storage disease type V (GSD5, GSD-V), [ 1 ] also known as McArdle's disease, [ 2 ] is a metabolic disorder, one of the metabolic myopathies, more specifically a muscle glycogen storage disease, caused by a deficiency of myophosphorylase. [ 3 ][ 4 ] Its incidence is reported as one in 100,000, roughly the same as glycogen storage ...
Danon disease (or glycogen storage disease Type IIb) is a metabolic disorder. [1] Danon disease is an X-linked lysosomal and glycogen storage disorder associated with hypertrophic cardiomyopathy , skeletal muscle weakness, and intellectual disability. [ 2 ]
Patients struggle to afford these drugs, leading to cycling, rationing, or using risky alternatives. Insurance companies often don't cover the drugs, and it could take years for prices to drop.
Endocrinology. Lysosomal storage diseases (LSDs; / ˌlaɪsəˈsoʊməl /) are a group of over 70 rare inherited metabolic disorders that result from defects in lysosomal function. [ 1 ][ 2 ] Lysosomes are sacs of enzymes within cells that digest large molecules and pass the fragments on to other parts of the cell for recycling.