Cited by 156Muscle Physiology and DisordersNutrition and Health in AgingMuscle metabolism and nutrition

Contributions of the ubiquitin-proteasome pathway and apoptosis to human skeletal muscle wasting with age

Whitman, Samantha A., Wacker, Michael J., Richmond, Scott R., Godard, Michael P.·2005·Pflügers Archiv - European Journal of Physiology

Abstract

The primary mechanism that contributes to decreasing skeletal muscle strength and size with healthy aging is not presently known. This study examined the contribution of the ubiquitin-proteasome pathway and apoptosis to skeletal muscle wasting in older adults (n = 21; mean age = 72.76 +/- 8.31 years) and young controls (n = 21; mean age = 21.48 +/- 2.93 years). Subjects underwent a percutaneous muscle biopsy of the vastus lateralis to determine: (1) ubiquitin ligase gene expression (MAFbx and MuRF1); (2) frequency of apoptosis; and (3) individual fiber type and cross-sectional area. In addition, a whole muscle strength test was also performed. A one-way ANOVA revealed significant increases in the number of positive TUNEL cells in older adults (87%; p < 0.05), although no significant increase in caspase-3/7 activity was detected. Additionally, ubiquitin ligase gene expression, individual muscle fiber type and CSA were not different between old and young subjects. Muscle strength was also significantly lower in old compared to young subjects (p < 0.05). In conclusion, this study indicates a preferential role for apoptosis contributing to decreases in muscle function with age.

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Crossref · 10.1007/s00424-005-1473-8

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  • Apoptosis signaling has been reported in muscle and neuronal cells of aged rodents and humans.

    “Apoptosis signaling has been reported in muscle and neuronal cells of aged rodents (4, 7, 26, 34, 47, 77, 88, 130), and humans (44, 145).”

    From Mitochondria initiate and regulate sarcopenia (2017) · cites this paper as [145]

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Authors
Whitman, S. A., Wacker, M. J., Richmond, S. R., & Godard, M. P.
Affiliations
University of Kansas (US)
Corresponding author
Godard, Michael P.
Venue
Pflügers Archiv - European Journal of Physiology
Published
2005-06-11
Volume
450
Issue
6
Pages
437-446
ISSN
  • 0031-6768 (ISSN-L)
  • 1432-2013
OpenAlex
W2076842664
Cited by
156
References
38
Citations by year
2026: 1 · 2025: 3 · 2024: 5 · 2023: 3 · 2022: 3 · 2021: 7 · 2020: 4 · 2019: 11 · 2018: 6 · 2017: 8 · 2016: 9 · 2015: 12 · 2014: 10 · 2013: 9 · 2012: 10
FWCI
3.01
Type
journal article
Language
en
Open access
closed
Locations
  • Pflügers Archiv - European Journal of Physiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Muscle Physiology and Disorders
  • Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
Keywords
skeletal muscle atrophy, sarcopenia, aging, ubiquitin-proteasome system, apoptosis, ubiquitin ligase, atrogin-1, MuRF1, TUNEL, caspase 3/7, muscle fiber type, cross-sectional area, muscle strength, vastus lateralis, older adults
MeSH terms
Tripartite Motif Proteins, Adolescent, Adult, Aged, Aging, Female, Humans, Male, Muscle Proteins, Muscular Atrophy, Polymerase Chain Reaction, Apoptosis, Muscle, Skeletal, In Situ Nick-End Labeling, Ubiquitin, Ubiquitin-Protein Ligases, SKP Cullin F-Box Protein Ligases, Proteasome Endopeptidase Complex

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