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A glycogen storage disease (GSD, also glycogenosis and dextrinosis) is a metabolic disorder caused by a deficiency of an enzyme or transport protein affecting glycogen synthesis, glycogen breakdown, or glucose breakdown, typically in muscles and/or liver cells.
Glycogen storage disease type VI (GSD VI) is a type of glycogen storage disease caused by a deficiency in liver glycogen phosphorylase or other components of the associated phosphorylase cascade system. [2] It is also known as "Hers' disease", after Henri G. Hers, who characterized it in 1959. [3]
Glycogen storage diseases (GSD) are a group of diseases caused by mutations related to glycogen metabolism. GSD type II (Pompe disease) GSD type V (McArdle disease) GSD type VII (Tarui disease) GSD type XI (Lactate dehydrogenase deficiency) GSD type X (Phosphoglycerate mutase deficiency) Phosphoglycerate kinase deficiency
The two organs most commonly affected are the liver and the skeletal muscle. Glycogen storage diseases that affect the liver typically cause hepatomegaly and hypoglycemia; those that affect skeletal muscle cause exercise intolerance, progressive weakness and cramping. [1] Glucose-6-phosphate isomerase deficiency affects step 2 of glycolysis.
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 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.
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 disease type ...
Approximately 1 in 20,000 to 25,000 newborns have a glycogen storage disease. [4] Andersen's disease affects 1 in 800,000 individuals worldwide, with 3% of all GSDs being type IV. [5] The disease was described and studied first by Dorothy Hansine Andersen. [6] [7]
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