" /> Glycogen storage disease III - CISMeF





Preferred Label : Glycogen storage disease III;

Symbol : GSD3;

CISMeF acronym : GSD IIIA; GSD IIIB; GSD IIIC; GSD IIID; GSD3;

Type : Phenotype, molecular basis known;

Alternative titles and symbols : Forbes disease; Cori disease; Limit dextrinosis; Amylo-1,6-glucosidase deficiency; Agl deficiency; Glycogen debrancher deficiency; Gde deficiency;

Included titles and symbols : GSD IIIa; GSD IIIb; GSD IIIc; GSD IIId; Glycogen storage disease iiia; Glycogen storage disease iiib; Glycogen storage disease iiic; Glycogen storage disease iiid;

Description : Glycogen storage disease III is an autosomal recessive metabolic disorder caused by deficiency of the glycogen debrancher enzyme and associated with an accumulation of abnormal glycogen with short outer chains. Most patients are enzyme-deficient in both liver and muscle (IIIa), but about 15% are enzyme-deficient in liver only (IIIb) (Shen et al., 1996). These subtypes have been explained by differences in tissue expression of the deficient enzyme (Endo et al., 2006). In rare cases, selective loss of only 1 of the 2 debranching activities, glucosidase or transferase, results in type IIIc or IIId, respectively. (Van Hoof and Hers, 1967; Ding et al., 1990). Clinically, patients with GSD III present in infancy or early childhood with hepatomegaly, hypoglycemia, and growth retardation. Muscle weakness in those with IIIa is minimal in childhood but can become more severe in adults; some patients develop cardiomyopathy (Shen et al., 1996). Lucchiari et al. (2007) provided a review of GSD III.;

Inheritance : Autosomal recessive;

Molecular basis : Caused by mutation in the amylo-1,6-glucosidase, 4-alpha-glucanotransferase gene (AGL, 610860.0001);

Laboratory abnormalities : Amylo-1,6-glucosidase deficiency; Hypoglycemia; Hyperlipidemia; Normal blood lactate; Normal uric acid; Elevated transaminases; Increased serum creatine kinase;

Prefixed ID : #232400;

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01/05/2025


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