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Skeletal muscle and aging.

A Navarro1, J M López-Cepero, M J Sánchez del Pino

  • 1Department of Biochemistry and Molecular Biology, Faculty of Medicine. University of Cádiz. Plaza Fragela No 9. 11003-Cadiz. Spain. ana.navarro@uca.es

Frontiers in Bioscience : a Journal and Virtual Library
|January 9, 2001
PubMed
Summary

Aging muscle mass loss, or sarcopenia, stems from cellular aging, particularly mitochondrial free radical production. This review explores cellular changes, exercise response, and dietary impacts on muscle aging.

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Area of Science:

  • Gerontology
  • Skeletal Muscle Physiology
  • Cellular Biology

Background:

  • Age-related muscle mass loss (sarcopenia) and functional decline involve complex cellular aging processes and adaptive responses.
  • Mitochondrial free radical production is a fundamental aging mechanism with cascading secondary effects on cells.
  • Skeletal muscle aging is influenced by intrinsic cellular mechanisms and extrinsic factors like hormonal and local signaling.

Purpose of the Study:

  • To review altered skeletal muscle cell biochemical and functional properties during aging.
  • To examine the role of intrinsic mechanisms and signaling changes in muscle aging.
  • To explore the impact of exercise and dietary restriction on muscle cell senescence.

Main Methods:

  • Literature review of age-related changes in skeletal muscle.

Related Experiment Videos

  • Analysis of cellular aging mechanisms, including mitochondrial function.
  • Examination of hormonal and local signaling in muscle phenotype maintenance.

    • Main Results:

    • Mitochondrial free radical production is a key driver of cellular aging in muscle.
    • Cellular senescence affects muscle's response to exercise.
    • Dietary restriction influences muscle cell senescence.

    Conclusions:

    • Skeletal muscle aging is a multifactorial process rooted in cellular senescence.
    • Understanding these cellular mechanisms can inform interventions for sarcopenia.
    • Further research into exercise and diet's role in mitigating muscle aging is warranted.