Cited by 196Muscle Physiology and DisordersInflammatory Myopathies and DermatomyositisExercise and Physiological Responses

Exercise enhances skeletal muscle regeneration by promoting senescence in fibro-adipogenic progenitors

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Saito, Yuki, Chikenji, Takako S., Matsumura, Takashi, Nakano, Masako, Fujimiya, Mineko·2020·Nature Communications

Abstract

Idiopathic inflammatory myopathies cause progressive muscle weakness and degeneration. Since high-dose glucocorticoids might not lead to full recovery of muscle function, physical exercise is also an important intervention, but some exercises exacerbate chronic inflammation and muscle fibrosis. It is unknown how physical exercise can have both beneficial and detrimental effects in chronic myopathy. Here we show that senescence of fibro-adipogenic progenitors (FAPs) in response to exercise-induced muscle damage is needed to establish a state of regenerative inflammation that induces muscle regeneration. In chronic inflammatory myopathy model mice, exercise does not promote FAP senescence or resistance against tumor necrosis factor-mediated apoptosis. Pro-senescent intervention combining exercise and pharmacological AMPK activation reverses FAP apoptosis resistance and improves muscle function and regeneration. Our results demonstrate that the absence of FAP senescence after exercise leads to muscle degeneration with FAP accumulation. FAP-targeted pro-senescent interventions with exercise and pharmacological AMPK activation may constitute a therapeutic strategy for chronic inflammatory myopathy.

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  • An acute bout of 14 d of downhill running promoted a senescent phenotype in skeletal muscle fibroadipogenic progenitors from young wild-type mice but not from mice with chronic inflammatory myopathy.

    “In a recent study, an acute bout of 14 d of downhill running promoted a senescent phenotype in skeletal muscle fibroadipogenic progenitors from young wild-type mice but not from mice with chronic inflammatory myopathy (58).”
  • Induction of senescence with exercise and pharmacological activation of AMPK using 5-aminoimidazole-4-carboxamide ribonucleotide improved muscle function, cross-sectional area, and regeneration in the chronic inflammatory myopathy model.

    “Induction of senescence with exercise and pharmacological activation of AMPK using 5-aminoimidazole-4-carboxamide ribonucleotide improved muscle function, cross-sectional area, and regeneration in the chronic inflammatory myopathy model.”
  • In this context, senescent FAPs improved skeletal muscle fiber size and performance on treadmill and grip strength tests.

    “senescent FAPs improved skeletal muscle fiber size and performance on treadmill and grip strength tests”
  • In young (3-months) mice, muscle damage caused by downhill treadmill running activated the expression of senescence markers, including p16 and p21 in FAPs.

    “in young (3-months) mice muscle damage caused by downhill treadmill running activated the expression of senescence markers, including p16 and p21 in FAPs”
  • Senescent FAPs may improve muscle regeneration through their pro-inflammatory expression profile.

    “possibly through the pro-inflammatory expression profile of FAPs which facilitates muscle regeneration”

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Authors
Saito, Y., Chikenji, T. S., Matsumura, T., Nakano, M., & Fujimiya, M.
Affiliations
Sapporo Medical University (JP)
Corresponding author
Chikenji, Takako S.
Venue
Nature Communications
Published
2020-02-14
Volume
11
Issue
1
Pages
889-889
ISSN
2041-1723 (ISSN-L)
OpenAlex
W3005549618
Cited by
196
References
72
Citations by year
2026: 35 · 2025: 29 · 2024: 36 · 2023: 28 · 2022: 32 · 2021: 26 · 2020: 10
FWCI
7.79
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Institutional Repositories DataBase (IRDB) (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Hokkaido University Collection of Scholarly and Academic Papers (Hokkaido University) (submittedVersion, cc-by)
  • Institutional Repositories DataBase (IRDB) (submittedVersion, cc-by)
Funders
Japan Society for the Promotion of Science (18K16668, 18K17722, 16K16430)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Epidemiology › Inflammatory Myopathies and Dermatomyositis
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
Keywords
physical activity, skeletal muscle regeneration, fibro-adipogenic progenitors, cellular senescence, exercise-induced muscle damage, AMPK activation, TNF-α, apoptosis resistance, muscle fibrosis, muscle degeneration
MeSH terms
Aging, Animals, Exercise Therapy, Female, Humans, Mice, Inbred BALB C, Mice, Inbred C57BL, Muscular Diseases, Regeneration, Apoptosis, Muscle, Skeletal, Mice, Mesenchymal Stem Cells

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