Cited by 104Muscle Physiology and DisordersMetabolism, Diabetes, and CancerAutophagy in Disease and Therapy

The AMPK/p27Kip1 Axis Regulates Autophagy/Apoptosis Decisions in Aged Skeletal Muscle Stem Cells

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White, James P., Billin, Andrew N., Campbell, Milton E., Russell, Alan J., Huffman, Kim M., Kraus, William E.·2018·Stem Cell Reports

Abstract

Skeletal muscle stem cell (MuSC) function declines with age and contributes to impaired muscle regeneration in older individuals. Acting through AMPK/p27 Kip1 , we have identified a pathway regulating the balance between autophagy, apoptosis, and senescence in aged MuSCs. While p27 Kip1 is implicated in MuSC aging, its precise role and molecular mechanism have not been elucidated. Age-related MuSC dysfunction was associated with reduced autophagy, increased apoptosis, and hypophosphorylation of AMPK and its downstream target p27 Kip1 . AMPK activation or ectopic expression of a phosphomimetic p27 Kip1 mutant was sufficient to suppress in vitro apoptosis, increase proliferation, and improve in vivo transplantation efficiency of aged MuSCs. Moreover, activation of the AMPK/p27 Kip1 pathway reduced markers of cell senescence in aged cells, which was, in part, dependent on p27 Kip1 phosphorylation. Thus, the AMPK/p27 Kip1 pathway likely regulates the autophagy/apoptosis balance in aged MuSCs and may be a potential target for improving muscle regeneration in older individuals.

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Crossref · 10.1016/j.stemcr.2018.06.014

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  • Autophagy is also required for activation out of quiescence, and defects in autophagic activity with ageing lead to increased cell death during activation.

    “Autophagy is also required for activation out of quiescence109, and defects in autophagic activity with ageing lead to increased cell death during activation110.”

    From Ageing and rejuvenation of tissue stem cells and their niches (2023) · cites this paper as [110]

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Authors
White, J. P., Billin, A. N., Campbell, M. E., Russell, A. J., Huffman, K. M., & Kraus, W. E.
Affiliations
  • Duke University (US)
  • GlaxoSmithKline (United States) (US)
Corresponding author
White, James P.
Venue
Stem Cell Reports
Publisher
Elsevier BV
Published
2018-08
Volume
11
Issue
2
Pages
425-439
ISSN
2213-6711 (ISSN-L)
OpenAlex
W2884425253
Cited by
104
References
59
Citations by year
2026: 15 · 2025: 17 · 2024: 11 · 2023: 11 · 2022: 16 · 2021: 14 · 2020: 14 · 2019: 5 · 2018: 1
FWCI
3.02
Type
journal article
Language
en
Open access
Locations
  • Stem Cell Reports (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
North Carolina GlaxoSmithKline Foundation (AG028716, AG056664)
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 › Epidemiology › Autophagy in Disease and Therapy
Keywords
AMPK, p27, skeletal muscle stem cells, aging, autophagy, apoptosis, cellular senescence, muscle regeneration, stem cell transplantation, stem cell proliferation
MeSH terms
Age Factors, Animals, Autophagy, Models, Biological, Phosphorylation, Stem Cells, Cellular Senescence, Apoptosis, Muscle Development, Satellite Cells, Skeletal Muscle, Cyclin-Dependent Kinase Inhibitor p27, Mice, AMP-Activated Protein Kinases

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