Summary
We determined glycogen concentration and phosphorylase ‘a+b’ and phosphorylase a activities in platelets, mononuclear and polymorphonuclear cells from control subjects and patients with phosphorylase kinase deficiency (glycogen storage disease IX) and liver phosphorylase deficiency (glycogen storage disease VI). Variations according to cellular type and to subjects' age (1–40 years) were established. Variable glycogen overloading was found in all our patients. Glycogen storage disease (GSD) VI was characterized by a diminished total phosphorylase activity with a low or normal a/(a+b) ratio of phosphorylase activity. GSD IX was characterized by a very low residual activity of phosphorylase a with an ‘a+b’ activity low or normal.
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Dahan, N., Baussan, C., Moatti, N. et al. Use of platelets, mononuclear and polymorphonuclear cells in the diagnosis of glycogen storage disease type VI. J Inherit Metab Dis 11, 253–260 (1988). https://doi.org/10.1007/BF01800366
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DOI: https://doi.org/10.1007/BF01800366