Cited by 140Mitochondrial Function and PathologyMuscle Physiology and DisordersAdipose Tissue and Metabolism

Muscle-specific Drp1 overexpression impairs skeletal muscle growth via translational attenuation

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Touvier, T, De Palma, C, Rigamonti, E, Scagliola, A, Incerti, E, Mazelin, L, Thomas, J-L, D'Antonio, M +4 more·2015·Cell Death & Disease

Abstract

Mitochondrial fission and fusion are essential processes in the maintenance of the skeletal muscle function. The contribution of these processes to muscle development has not been properly investigated in vivo because of the early lethality of the models generated so far. To define the role of mitochondrial fission in muscle development and repair, we have generated a transgenic mouse line that overexpresses the fission-inducing protein Drp1 specifically in skeletal muscle. These mice displayed a drastic impairment in postnatal muscle growth, with reorganisation of the mitochondrial network and reduction of mtDNA quantity, without the deficiency of mitochondrial bioenergetics. Importantly we found that Drp1 overexpression activates the stress-induced PKR/eIF2 α /Fgf21 pathway thus leading to an attenuated protein synthesis and downregulation of the growth hormone pathway. These results reveal for the first time how mitochondrial network dynamics influence muscle growth and shed light on aspects of muscle physiology relevant in human muscle pathologies.

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Authors
Touvier, T., De Palma, C., Rigamonti, E., Scagliola, A., Incerti, E., Mazelin, L., Thomas, J.-L., D'Antonio, M., Politi, L., Schaeffer, L., Clementi, E., & Brunelli, S.
Affiliations
  • IRCCS Eugenio Medea (IT)
  • IRCCS Ospedale San Raffaele (IT)
  • École Normale Supérieure de Lyon (FR)
  • University of Milan (IT)
Corresponding author
  • Clementi, E
  • Brunelli, S
Venue
Cell Death & Disease
Published
2015-02-26
Volume
6
Issue
2
Pages
e1663-e1663
ISSN
2041-4889 (ISSN-L)
OpenAlex
W2002049655
Cited by
140
References
52
Citations by year
2026: 8 · 2025: 19 · 2024: 14 · 2023: 14 · 2022: 11 · 2021: 22 · 2020: 17 · 2019: 12 · 2018: 11 · 2017: 6 · 2016: 4 · 2015: 2
FWCI
3.33
Type
journal article
Language
en
Open access
Locations
  • Cell Death and Disease (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Archivio Istituzionale della Ricerca (Universita Degli Studi Di Milano) (submittedVersion, cc-by)
  • BOA (University of Milano-Bicocca) (submittedVersion, cc-by)
Funders
  • European Commission (241440)
  • Ministero della Salute (RC2015, GR–2011–02350544, PRIN 2010-2011)
  • Ministero dell’Istruzione, dell’Università e della Ricerca (PRIN 2010-2011 “, (PRIN 2010))
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
Keywords
Drp1, mitochondrial fission, mitochondrial dynamics, skeletal muscle growth, translational attenuation, PKR, eIF2α, FGF21, myogenesis, mitochondrial DNA, transgenic mouse model, muscle regeneration
MeSH terms
Animals, DNA, Mitochondrial, Mice, Transgenic, Oxygen Consumption, Blotting, Western, Muscle, Skeletal, Dynamins, Immunoprecipitation, Mice, Membrane Potential, Mitochondrial

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