Cited by 166Muscle Physiology and DisordersMesenchymal stem cell researchPluripotent Stem Cells Research

The ins and outs of muscle stem cell aging

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Brack, Andrew S., Muñoz-Cánoves, Pura·2015·Skeletal Muscle

Abstract

Skeletal muscle has a remarkable capacity to regenerate by virtue of its resident stem cells (satellite cells). This capacity declines with aging, although whether this is due to extrinsic changes in the environment and/or to cell-intrinsic mechanisms associated to aging has been a matter of intense debate. Furthermore, while some groups support that satellite cell aging is reversible by a youthful environment, others support cell-autonomous irreversible changes, even in the presence of youthful factors. Indeed, whereas the parabiosis paradigm has unveiled the environment as responsible for the satellite cell functional decline, satellite cell transplantation studies support cell-intrinsic deficits with aging. In this review, we try to shed light on the potential causes underlying these discrepancies. We propose that the experimental paradigm used to interrogate intrinsic and extrinsic regulation of stem cell function may be a part of the problem. The assays deployed are not equivalent and may overburden specific cellular regulatory processes and thus probe different aspects of satellite cell properties. Finally, distinct subsets of satellite cells may be under different modes of molecular control and mobilized preferentially in one paradigm than in the other. A better understanding of how satellite cells molecularly adapt during aging and their context-dependent deployment during injury and transplantation will lead to the development of efficacious compensating strategies that maintain stem cell fitness and tissue homeostasis throughout life.

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Authors
Brack, A. S., & Muñoz-Cánoves, P.
Affiliations
University of California, San Francisco (US)
Corresponding author
Brack, Andrew S.
Venue
Skeletal Muscle
Published
2015-12
Volume
6
Issue
1
Pages
1-1
ISSN
2044-5040 (ISSN-L)
OpenAlex
W2271088568
Cited by
166
References
76
Citations by year
2026: 12 · 2025: 11 · 2024: 8 · 2023: 18 · 2022: 17 · 2021: 22 · 2020: 19 · 2019: 19 · 2018: 13 · 2017: 11 · 2016: 16
FWCI
1.28
Type
journal article
Language
en
Open access
Locations
  • Skeletal Muscle (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RECERCAT (Consorci de Serveis Universitaris de Catalunya) (publishedVersion, other-oa)
  • eScholarship (California Digital Library) (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion, cc-by)
  • Repositori digital de la UPF (Universitat Pompeu Fabra) (submittedVersion, cc-by)
Funders
National Institute of Arthritis and Musculoskeletal and Skin Diseases (RO1AR060868, R01AR061002)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Genetics › Mesenchymal stem cell research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Pluripotent Stem Cells Research
Keywords
muscle stem cells, satellite cells, aging, skeletal muscle regeneration, parabiosis, stem cell transplantation, extrinsic aging, intrinsic aging, tissue homeostasis, stem cell mobilization
MeSH terms
Animals, Cell Differentiation, Humans, Phenotype, Signal Transduction, Cellular Senescence, Muscle, Skeletal, Satellite Cells, Skeletal Muscle, Cell Proliferation, Stem Cell Niche

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