Cited by 158Muscle Physiology and DisordersMetabolism, Diabetes, and CancerAdipose Tissue and Metabolism

Obesity Impairs Skeletal Muscle Regeneration Through Inhibition of AMPK

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Fu, Xing, Zhu, Meijun, Zhang, Shuming, Foretz, Marc, Viollet, Benoit, Du, Min·2016·Diabetes

Abstract

Obesity is increasing rapidly worldwide and is accompanied by many complications, including impaired muscle regeneration. The obese condition is known to inhibit AMPK activity in multiple tissues. We hypothesized that the loss of AMPK activity is a major reason for hampered muscle regeneration in obese subjects. We found that obesity inhibits AMPK activity in regenerating muscle, which was associated with impeded satellite cell activation and impaired muscle regeneration. To test the mediatory role of AMPKα1, we knocked out AMPKα1 and found that both proliferation and differentiation of satellite cells are reduced after injury and that muscle regeneration is severely impeded, reminiscent of hampered muscle regeneration seen in obese subjects. Transplanted satellite cells with AMPKα1 deficiency had severely impaired myogenic capacity in regenerating muscle fibers. We also found that attenuated muscle regeneration in obese mice is rescued by AICAR, a drug that specifically activates AMPK, but AICAR treatment failed to improve muscle regeneration in obese mice with satellite cell–specific AMPKα1 knockout, demonstrating the importance of AMPKα1 in satellite cell activation and muscle regeneration. In summary, AMPKα1 is a key mediator linking obesity and impaired muscle regeneration, providing a convenient drug target to facilitate muscle regeneration in obese populations.

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Authors
Fu, X., Zhu, M., Zhang, S., Foretz, M., Viollet, B., & Du, M.
Affiliations
  • Washington State University (US)
  • Centre National de la Recherche Scientifique (FR)
  • INSERM U1016, Institut Cochin, Paris, France
Corresponding author
Du, Min
Venue
Diabetes
Published
2015-09-17
Volume
65
Issue
1
Pages
188-200
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2229640146
Cited by
155
References
47
Citations by year
2026: 10 · 2025: 6 · 2024: 12 · 2023: 12 · 2022: 23 · 2021: 18 · 2020: 15 · 2019: 19 · 2018: 17 · 2017: 13 · 2016: 10
FWCI
5.79
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Civil War Book Review (submittedVersion)
Funders
National Institutes of Health (1R01-HD-067449)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Physiology › Adipose Tissue and Metabolism
Keywords
obesity, skeletal muscle regeneration, AMPK, AMPKα1, satellite cells, satellite cell activation, muscle damage, AICAR, AMPK activation, myogenesis, therapeutic target
MeSH terms
Aminoimidazole Carboxamide, Animals, Cell Differentiation, Flow Cytometry, Hypoglycemic Agents, Immunohistochemistry, Obesity, Regeneration, Ribonucleotides, Immunoblotting, Mice, Knockout, Muscle, Skeletal, Reverse Transcriptase Polymerase Chain Reaction, Muscle Development, Satellite Cells, Skeletal Muscle, Cell Proliferation, Mice, AMP-Activated Protein Kinases, Diet, High-Fat

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