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It is caused by an accumulation of glycogen in the lysosome due to a deficiency of the lysosomal acid alpha-glucosidase enzyme (GAA). The inability to break down glycogen within the lysosomes of cells leads to progressive muscle weakness throughout the body and affects various body tissues, particularly in the heart , skeletal muscles , liver ...
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. [1] GSD has two classes of cause: genetic and environmental.
This leads to very long unbranched glucose chains being stored in glycogen. The long unbranched molecules have low solubility, leading to glycogen precipitation in the liver. These deposits subsequently build up in the body tissue, especially the heart and liver. The inability to break down glycogen in muscle cells causes muscle weakness.
This enzyme is involved in the production of a complex sugar called glycogen, which is a major source of stored energy in the body. Most GBE1 gene mutations result in a shortage (deficiency) of the glycogen branching enzyme, which leads to the production of abnormal glycogen molecules. These abnormal glycogen molecules, called polyglucosan ...
Glycogen storage disease type III; Other names: Cori Disease, Debrancher Deficiency, Forbes Disease [1] Micrograph of glycogen storage disease with histologic features consistent with Cori disease. Liver biopsy. H&E stain. Specialty: Endocrinology Symptoms: Hypotonia [2] Causes: AGL gene mutation [3] Diagnostic method: Biopsy, Elevated ...
Other congenital metabolic diseases; some of the common include Maple syrup urine disease and other organic acidurias; Type 1 glycogen storage disease; Type III glycogen storage disease. Can cause less severe hypoglycemia than type I; Phosphoenolpyruvate carboxykinase deficiency, causes metabolic acidosis and severe hypoglycemia.
GSD Ia is caused by a deficiency in the enzyme glucose-6-phosphatase; GSD Ib, a deficiency in the transport protein glucose-6-phosphate translocase. Because glycogenolysis is the principal metabolic mechanism by which the liver supplies glucose to the body during fasting , both deficiencies cause severe hypoglycemia and, over time, excess ...
Phosphofructokinase deficiency; Other names: Glycogen storage disease type VII or Tarui's disease [1] [2] A rendering of the human muscular form of phosphofructokinase. Mutations in the production of this enzyme are the cause of Tarui's disease. [3] The symmetry of the enzyme is a result of its tetrameric structure. Specialty: Endocrinology ...