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Glycogen storage disease type IV is a rare hereditary metabolic disorder. It is the result of a mutation in GBE1 gene, which causes a defect in the glycogen branching enzyme. Therefore, glycogen is not made properly and abnormal glycogen molecules accumulate in cells; most severely in cardiac and muscle cells. The severity of this disease varies on the amount of enzyme produced. Glycogen Storage Disease Type IV is autosomal recessive, which means each parent has a mutant copy of the gene but show no symptoms of the disease. It affects 1 in 800,000 individuals worldwide, with 3% of all Glycogen Storage Diseases being type IV.〔"Glycogen Storage Disease Type IV." ''Genetics Home Reference''. U.S. National Library of Medicine, 10 Sept. 2015. Web. 27 Sept. 2015.〕 ==Synonyms== It is also known as: *Glycogenosis type IV *Glycogen branching enzyme deficiency *Polyglucosan body disease *Amylopectinosis 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Glycogen storage disease type IV」の詳細全文を読む スポンサード リンク
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