Cited by 265Muscle Physiology and DisordersTissue Engineering and Regenerative MedicineHippo pathway signaling and YAP/TAZ

Aging of the skeletal muscle extracellular matrix drives a stem cell fibrogenic conversion

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Stearns-Reider, Kristen M., D'Amore, Antonio, Beezhold, Kevin, Rothrauff, Benjamin, Cavalli, Loredana, Wagner, William R., Vorp, David A., Tsamis, Alkiviadis +6 more·2017·Aging Cell

Abstract

Age-related declines in skeletal muscle regeneration have been attributed to muscle stem cell (MuSC) dysfunction. Aged MuSCs display a fibrogenic conversion, leading to fibrosis and impaired recovery after injury. Although studies have demonstrated the influence of in vitro substrate characteristics on stem cell fate, whether and how aging of the extracellular matrix (ECM) affects stem cell behavior has not been investigated. Here, we investigated the direct effect of the aged muscle ECM on MuSC lineage specification. Quantification of ECM topology and muscle mechanical properties reveals decreased collagen tortuosity and muscle stiffening with increasing age. Age-related ECM alterations directly disrupt MuSC responses, and MuSCs seeded ex vivo onto decellularized ECM constructs derived from aged muscle display increased expression of fibrogenic markers and decreased myogenicity, compared to MuSCs seeded onto young ECM. This fibrogenic conversion is recapitulated in vitro when MuSCs are seeded directly onto matrices elaborated by aged fibroblasts. When compared to young fibroblasts, fibroblasts isolated from aged muscle display increased nuclear levels of the mechanosensors, Yes-associated protein (YAP)/transcriptional coactivator with PDZ-binding motif (TAZ), consistent with exposure to a stiff microenvironment in vivo. Accordingly, preconditioning of young fibroblasts by seeding them onto a substrate engineered to mimic the stiffness of aged muscle increases YAP/TAZ nuclear translocation and promotes secretion of a matrix that favors MuSC fibrogenesis. The findings here suggest that an age-related increase in muscle stiffness drives YAP/TAZ-mediated pathogenic expression of matricellular proteins by fibroblasts, ultimately disrupting MuSC fate.

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Crossref · 10.1111/acel.12578

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  • Decreased collagen tortuosity and increased stiffness in the muscle niche are associated with aberrant MuSC differentiation.

    “Decreased collagen tortuosity and increased stiffness in the muscle niche are associated with aberrant MuSC differentiation82.”
  • In muscle, quantitative proteomic studies reveal striking remodelling in ECM during ageing, and those changes can influence MuSC function.

    “In muscle, quantitative proteomic studies also reveal striking remodelling in ECM during ageing66,82, and those changes can influence MuSC function.”
  • In muscle, ECM stiffness also increases with age and is associated with decreased collagen tortuosity; these ECM changes induce MuSCs to adopt a more fibrogenic fate, thereby diminishing their myogenic potential.

    “In muscle, ECM stiffness also increases with age and is associated with decreased collagen tortuosity82. These ECM changes induce MuSCs to adopt a more fibrogenic fate, thereby diminishing their myogenic potential.”

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Authors
Stearns-Reider, K. M., D'Amore, A., Beezhold, K., Rothrauff, B., Cavalli, L., Wagner, W. R., Vorp, D. A., Tsamis, A., Shinde, S., Zhang, C., Barchowsky, A., Rando, T. A., Tuan, R. S., & Ambrosio, F.
Affiliations
  • University of Pittsburgh (US)
  • Department of Surgery; University of Pittsburgh; 450 Technology Drive, Suite 300 Pittsburgh PA 15219 USA
  • University of Leicester (GB)
  • VA Palo Alto Health Care System (US)
Corresponding author
Ambrosio, Fabrisia
Venue
Aging Cell
Publisher
Wiley
Published
2017-03-30
Volume
16
Issue
3
Pages
518-528
ISSN
1474-9718 (ISSN-L)
OpenAlex
W2601343417
Cited by
265
References
52
Citations by year
2026: 41 · 2025: 30 · 2024: 31 · 2023: 31 · 2022: 25 · 2021: 38 · 2020: 29 · 2019: 22 · 2018: 13 · 2017: 5
FWCI
7.71
Type
journal article
Language
en
Open access
Locations
  • Aging Cell (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Figshare (submittedVersion, cc-by)
  • Leicester Research Archive (University of Leicester) (submittedVersion, cc-by)
Funders
  • National Institutes of Health
  • National Institute on Aging (K01AG039477)
  • National Institute of Environmental Health Sciences (F32ES022134, R01ES023696, R01ES025529)
  • University of Pittsburgh Medical Center Rehabilitation Institute
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Surgery › Tissue Engineering and Regenerative Medicine
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hippo pathway signaling and YAP/TAZ
Keywords
skeletal muscle aging, muscle stem cells, extracellular matrix, muscle fibrosis, muscle stiffness, matricellular proteins, muscle regeneration
MeSH terms
YAP-Signaling Proteins, Acyltransferases, Aging, Animals, Biomechanical Phenomena, Cell Differentiation, Extracellular Matrix, Fibroblasts, Fibrosis, Gene Expression Regulation, Male, Mice, Inbred C57BL, Phosphoproteins, Stem Cells, Transcription Factors, Muscle, Skeletal, Cell Cycle Proteins, Muscle Development, Myoblasts, Adaptor Proteins, Signal Transducing, Mice, Torsion, Mechanical, Primary Cell Culture

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