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Sarcopenia of aging: underlying cellular mechanisms and protection by calorie restriction

Emanuele Marzetti1, Hazel Anne Lees, Stephanie Eva Wohlgemuth

  • 1Department of Aging and Geriatric Research, Institute on Aging, Division of Biology of Aging, University of Florida, Gainesville, FL 32610, USA. emarzetti@aging.ufl.edu

Biofactors (Oxford, England)
|March 26, 2009
PubMed

Insights

Calorie restriction (CR) may combat sarcopenia, the age-related loss of muscle mass and function. Research suggests CR preserves muscle mitochondria and function, potentially delaying sarcopenia progression in older adults.

Area of Science:

  • Gerontology and cellular biology
  • Muscle physiology and aging research

Background:

  • Sarcopenia, characterized by muscle mass and function decline, is a significant aging-related health concern.
  • Cellular mechanisms implicated in sarcopenia include mitochondrial dysfunction, apoptosis, autophagy, and trace metal imbalance.
  • Calorie restriction (CR) without malnutrition shows promise in mitigating age-related muscle loss across species.

Purpose of the Study:

  • To explore the potential of calorie restriction (CR) as a strategy to counteract sarcopenia.
  • To investigate the cellular mechanisms through which CR may protect against muscle aging.

Main Methods:

  • Review of existing literature on sarcopenia, calorie restriction, and cellular aging mechanisms.
  • Analysis of studies investigating CR's effects on mitochondrial function, apoptosis, autophagy, and oxidative stress in aging muscle.
  • Examination of preliminary human data on CR and muscle mitochondrial biogenesis.

Main Results:

  • CR preserves mitochondrial integrity and function, reduces oxidative stress, and favorably modulates apoptotic and autophagic signaling.
  • Evidence suggests CR can promote mitochondrial biogenesis in muscle.
  • Preliminary human studies indicate moderate CR may enhance muscle mitochondrial biogenesis in middle-aged individuals.

Conclusions:

  • Calorie restriction (CR) demonstrates potential as a strategy to mitigate sarcopenia by preserving muscle mitochondrial health and function.
  • Further research is essential to confirm the safety and efficacy of CR in preventing or delaying sarcopenia in the elderly population.

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