A new muscle glycogen storage disease associated with glycogenin-1 deficiency

Edoardo Malfatti, Johanna Nilsson, Carola Hedberg-Oldfors, Aurelio Hernandez-Lain, Fabrice Michel, Cristina Dominguez-Gonzalez, Gabriel Viennet, H. Orhan Akman, Cornelia Kornblum, Peter Van den Bergh, Norma B. Romero, Andrew G. Engel, Salvatore DiMauro, Anders Oldfors

Research output: Contribution to journalArticle


We describe a slowly progressive myopathy in 7 unrelated adult patients with storage of polyglucosan in muscle fibers. Genetic investigation revealed homozygous or compound heterozygous deleterious variants in the glycogenin-1 gene (GYG1). Most patients showed depletion of glycogenin-1 in skeletal muscle, whereas 1 showed presence of glycogenin-1 lacking the C-terminal that normally binds glycogen synthase. Our results indicate that either depletion of glycogenin-1 or impaired interaction with glycogen synthase underlies this new form of glycogen storage disease that differs from a previously reported patient with GYG1 mutations who showed profound glycogen depletion in skeletal muscle and accumulation of glycogenin-1.

Original languageEnglish (US)
Pages (from-to)891-898
Number of pages8
JournalAnnals of Neurology
Issue number6
StatePublished - Dec 1 2014
Externally publishedYes

ASJC Scopus subject areas

  • Medicine(all)

Fingerprint Dive into the research topics of 'A new muscle glycogen storage disease associated with glycogenin-1 deficiency'. Together they form a unique fingerprint.

  • Cite this

    Malfatti, E., Nilsson, J., Hedberg-Oldfors, C., Hernandez-Lain, A., Michel, F., Dominguez-Gonzalez, C., Viennet, G., Akman, H. O., Kornblum, C., Van den Bergh, P., Romero, N. B., Engel, A. G., DiMauro, S., & Oldfors, A. (2014). A new muscle glycogen storage disease associated with glycogenin-1 deficiency. Annals of Neurology, 76(6), 891-898. https://doi.org/10.1002/ana.24284