Myophosphorylase deficiency (glycogenosis type V; McArdle disease)

S. DiMauro, A. L. Andreu, C. Bruno, G. M. Hadjigeorgiou

Research output: Contribution to journalArticlepeer-review


McArdle disease, one of the most common metabolic causes of exercise intolerance and recurrent myoglobinuria, is due to biochemical defects of the muscle isoform of glycogen phosphorylase. The gene for myophosphorylase (PGYM) is on chromosome 11, and 33 distinct mutations have been identified in patients from all over the world. In Caucasians, a nonsense mutation in exon 1 (R49X) is common enough to warrant screening of genomic DNA from blood before considering muscle biopsy. Other mutations are prevalent in different ethnic groups or are "private". Mutations are spread throughout the gene and there is no clear genotype:phenotype correlation. High-protein diet and aerobic exercise are beneficial, and gene therapy appears promising.

Original languageEnglish
Pages (from-to)189-196
Number of pages8
JournalCurrent Molecular Medicine
Issue number2
Publication statusPublished - 2002

ASJC Scopus subject areas

  • Biochemistry


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