Cited by 596Muscle Physiology and DisordersMitochondrial Function and PathologyAutophagy in Disease and Therapy

Mitochondrial fission and remodelling contributes to muscle atrophy

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Romanello, Vanina, Guadagnin, Eleonora, Gomes, Ligia, Roder, Ira, Sandri, Claudia, Petersen, Yvonne, Milan, Giulia, Masiero, Eva +5 more·2010·The EMBO Journal

Abstract

Mitochondria are crucial organelles in the production of energy and in the control of signalling cascades. A machinery of pro-fusion and fission proteins regulates their morphology and subcellular localization. In muscle this results in an orderly pattern of intermyofibrillar and subsarcolemmal mitochondria. Muscular atrophy is a genetically controlled process involving the activation of the autophagy-lysosome and the ubiquitin-proteasome systems. Whether and how the mitochondria are involved in muscular atrophy is unknown. Here, we show that the mitochondria are removed through autophagy system and that changes in mitochondrial network occur in atrophying muscles. Expression of the fission machinery is per se sufficient to cause muscle wasting in adult animals, by triggering organelle dysfunction and AMPK activation. Conversely, inhibition of the mitochondrial fission inhibits muscle loss during fasting and after FoxO3 overexpression. Mitochondrial-dependent muscle atrophy requires AMPK activation as inhibition of AMPK restores muscle size in myofibres with altered mitochondria. Thus, disruption of the mitochondrial network is an essential amplificatory loop of the muscular atrophy programme.

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Authors
Romanello, V., Guadagnin, E., Gomes, L., Roder, I., Sandri, C., Petersen, Y., Milan, G., Masiero, E., Del Piccolo, P., Foretz, M., Scorrano, L., Rudolf, R., & Sandri, M.
Affiliations
  • Veneto Institute of Molecular Medicine (IT)
  • Karlsruhe Institute of Technology (DE)
  • Centre National de la Recherche Scientifique (FR)
  • University of Padua (IT)
Corresponding author
Sandri, Marco
Venue
The EMBO Journal
Published
2010-04-16
Volume
29
Issue
10
Pages
1774-1785
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2114063620
Cited by
596
References
41
Citations by year
2026: 11 · 2025: 32 · 2024: 27 · 2023: 27 · 2022: 41 · 2021: 45 · 2020: 32 · 2019: 42 · 2018: 44 · 2017: 39 · 2016: 35 · 2015: 41 · 2014: 41 · 2013: 47 · 2012: 47
FWCI
17.99
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Archive ouverte UNIGE (University of Geneva) (submittedVersion, cc-by)
  • Archive ouverte UNIGE (University of Geneva) (submittedVersion)
  • Padua Research Archive (University of Padova) (submittedVersion)
Funders
  • European Commission (223576)
  • Deutsche Forschungsgemeinschaft
  • Ministero dell’Istruzione, dell’Università e della Ricerca (PRIN2007)
  • Associazione Italiana per la Ricerca sul Cancro (PRIN 2007)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
mitochondrial fission, mitochondrial remodeling, muscle atrophy, AMPK activation, autophagy, FOXO3, fasting, mitochondrial network, ubiquitin-proteasome system
MeSH terms
Animals, Autophagy, Cell Line, Humans, Microscopy, Fluorescence, Mitochondria, Models, Biological, Muscular Atrophy, Time Factors, Transfection, Signal Transduction, Muscle, Skeletal, RNA Interference, Mice, AMP-Activated Protein Kinases

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