Cited by 126Autophagy in Disease and TherapyGlycogen Storage Diseases and MyoclonusMuscle Physiology and Disorders

Defects of Vps15 in skeletal muscles lead to autophagic vacuolar myopathy and lysosomal disease

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Nemazanyy, Ivan, Blaauw, Bert, Paolini, Cecilia, Caillaud, Catherine, Protasi, Feliciano, Mueller, Amelie, Proikas‐Cezanne, Tassula, Russell, Ryan C. +5 more·2013·EMBO Molecular Medicine

Abstract

The complex of Vacuolar Protein Sorting 34 and 15 (Vps34 and Vps15) has Class III phosphatidylinositol 3‐kinase activity and putative roles in nutrient sensing, mammalian Target Of Rapamycin (mTOR) activation by amino acids, cell growth, vesicular trafficking and autophagy. Contrary to expectations, here we show that Vps15 ‐deficient mouse tissues are competent for LC3‐positive autophagosome formation and maintain mTOR activation. However, an impaired lysosomal function in mutant cells is traced by accumulation of adaptor protein p62, LC3 and Lamp2 positive vesicles, which can be reverted to normal levels after ectopic overexpression of Vps15. Mice lacking Vps15 in skeletal muscles, develop a severe myopathy. Distinct from the autophagy deficient Atg7 −/− mutants, pathognomonic morphological hallmarks of autophagic vacuolar myopathy (AVM) are observed in Vps15 −/− mutants, including elevated creatine kinase plasma levels, accumulation of autophagosomes, glycogen and sarcolemmal features within the fibres. Importantly, Vps34/Vps15 overexpression in myoblasts of Danon AVM disease patients alleviates the glycogen accumulation. Thus, the activity of the Vps34/Vps15 complex is critical in disease conditions such as AVMs, and possibly a variety of other lysosomal storage diseases.

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  • Over-expression of the VPS34-VPS15 complex in Danon disease patient myoblasts results in a partial amelioration of glycogen overload.

    “Also, over-expression of the VPS34–VPS15 complex in Danon disease patients in myoblasts results in a partial amelioration of glycogen overload [242].”
  • Muscle-specific VPS15 knockout mice develop a severe myopathy with hallmarks of Danon disease myopathy, including alterations in mitochondrial morphology and accumulation of autophagosomes and glycogen due to a defect in fusion of autophagosomes with lysosomes.

    “Muscle-specific VPS15 knockout mice develop a severe myopathy with hallmarks of DD myopathy, including alterations in mitochondrial morphology, and accumulation of autophagosomes and glycogen due to a defect in the fusion of autophagosomes with lysosomes.”

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Authors
Nemazanyy, I., Blaauw, B., Paolini, C., Caillaud, C., Protasi, F., Mueller, A., Proikas‐Cezanne, T., Russell, R. C., Guan, K., Nishino, I., Sandri, M., Pende, M., & Panasyuk, G.
Affiliations
  • Inserm (FR)
  • Veneto Institute of Molecular Medicine (IT)
  • University of Chieti-Pescara (IT)
  • University of Tübingen (DE)
  • University of California San Diego (US)
  • National Center of Neurology and Psychiatry (JP)
Corresponding author
Pende, Mario
Venue
EMBO Molecular Medicine
Published
2013-04-30
Volume
5
Issue
6
Pages
870-890
ISSN
  • 1757-4676 (ISSN-L)
  • 1757-4684
OpenAlex
W2164029978
Cited by
126
References
69
Citations by year
2026: 5 · 2025: 5 · 2024: 10 · 2023: 11 · 2022: 11 · 2021: 16 · 2020: 8 · 2019: 5 · 2018: 8 · 2017: 10 · 2016: 8 · 2015: 11 · 2014: 10 · 2013: 8
FWCI
8.99
Type
journal article
Language
en
Open access
Locations
  • EMBO Molecular Medicine (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • Padua Research Archive (University of Padova) (submittedVersion)
Funders
National Institute of General Medical Sciences (R01GM051586)
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Health Sciences › Medicine › Rheumatology › Glycogen Storage Diseases and Myoclonus
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
Keywords
VPS15, Vps34, class III phosphatidylinositol 3-kinase, autophagic vacuolar myopathy, lysosomal storage disease, skeletal muscle, autophagy, mTOR activation, p62, LC3, LAMP2, glycogen accumulation, Danon disease, creatine kinase, myoblasts, lysosomal function
MeSH terms
Autophagy-Related Protein 7, Animals, Autophagy, Cell Line, Humans, Microtubule-Associated Proteins, Muscular Diseases, Transcription Factors, Lysosomal Storage Diseases, Mice, Knockout, Muscle, Skeletal, Mice, Transcription Factor TFIIH, Lysosomal-Associated Membrane Protein 2, Class III Phosphatidylinositol 3-Kinases, TOR Serine-Threonine Kinases, Vacuolar Sorting Protein VPS15

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