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Related Concept Videos

Mitochondria01:37

Mitochondria

Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...

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Imaging and Quantifying Mitochondrial Morphology in C. elegans During Aging
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Imaging and Quantifying Mitochondrial Morphology in C. elegans During Aging

Published on: January 17, 2025

A morphometric study on human muscle mitochondria in aging.

Carlo Bertoni-Freddari1, Patrizia Fattoretti, Ugo Caselli

  • 1Centre for Surgical Research (Neurobiology of Aging Unit) "N. Masera" Research Department INRCA, Via Birarelli 8, 60100 Ancona, Italy.

Journal of the American Aging Association
|April 23, 2013
PubMed
Summary

Mitochondrial structure in human muscles remains largely preserved with aging. While some shape changes occur, these metrics suggest mitochondria adapt well to age-related demands, supporting muscle function.

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Area of Science:

  • Mitochondrial biology
  • Skeletal muscle physiology
  • Aging research

Background:

  • Mitochondria are crucial for cellular energy production and adapt their structure to metabolic needs.
  • Muscle performance declines with age, potentially linked to mitochondrial dysfunction.
  • Understanding age-related changes in mitochondrial morphology is key to addressing muscle aging.

Purpose of the Study:

  • To investigate age-related alterations in the ultrastructure of subsarcolemmal and intermyofibrillar mitochondria in human skeletal muscle.
  • To determine if morphological changes in mitochondria contribute to age-related muscle performance decline.

Main Methods:

  • Collected muscle biopsies from young, middle-aged, and old healthy volunteers.
  • Utilized computer-assisted morphometric analysis to measure mitochondrial area, diameter, and pleomorphism.
  • Assessed subsarcolemmal and intermyofibrillar mitochondrial populations.

Main Results:

  • No significant age-related differences in overall mitochondrial ultrastructure were observed.
  • A trend towards decreased mitochondrial area (MAA) and diameter (Dmax) with age was noted.
  • An age-related increase in the mitochondrial pleomorphic index (Plei) was observed, indicating more varied shapes in older individuals.

Conclusions:

  • Muscle mitochondrial ultrastructure is substantially preserved throughout aging.
  • Morphological parameters like MAA, Dmax, and Plei reflect mitochondrial adaptive responses to aging.
  • The findings suggest mitochondria maintain significant adaptive capacity despite aging.