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Related Concept Videos

Mitochondria01:37

Mitochondria

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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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The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
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A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
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Mitochondrial precursors are translocated to the internal subcompartments via independent mechanisms involving distinct protein machineries called translocases.
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Updated: Jul 13, 2025

Author Spotlight: Unveiling Mitochondrial Function and Cellular Metabolic Adaptation in Metabolic Diseases
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Exercise mitigates age-related metabolic diseases by improving mitochondrial dysfunction.

Dandan Jia1, Zhenjun Tian2, Ru Wang1

  • 1School of Exercise and Health, Shanghai University of Sport, Shanghai 200438, China.

Ageing Research Reviews
|October 13, 2023
PubMed
Summary

Regular physical activity benefits aging by improving mitochondrial function and biogenesis, combating age-related diseases. Exercise-released exerkines show promise for therapeutic interventions targeting mitochondrial dysfunction.

Keywords:
Age-related diseasesAgeingExerkinesMitochondrial dysfunction

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Area of Science:

  • Exercise physiology
  • Mitochondrial biology
  • Aging research

Background:

  • Aging is linked to numerous age-related disorders, including metabolic diseases like diabetes and fatty liver disease.
  • Mitochondrial dysfunction is a key factor in the aging process and the development of these diseases.
  • The precise molecular mechanisms underlying exercise's benefits on aging and related disorders are not fully understood.

Purpose of the Study:

  • To review the benefits of exercise on metabolic diseases associated with aging.
  • To explore the role of mitochondrial health as a mediator of exercise benefits.
  • To discuss the potential of exerkines as therapeutic targets for age-related disorders.

Main Methods:

  • Comprehensive literature review of studies on exercise, aging, metabolic diseases, and mitochondrial function.
  • Analysis of molecular mechanisms linking physical activity to improved mitochondrial biogenesis and function.
  • Examination of the role of exerkines in mediating exercise's effects.

Main Results:

  • Exercise promotes mitochondrial biogenesis and function, crucial for alleviating metabolic diseases in aging individuals.
  • Mitochondrial health is a significant factor in how exercise impacts aging and related conditions.
  • Exerkines, signaling molecules released during exercise, may play a role in mitigating age-related mitochondrial dysfunction.

Conclusions:

  • Regular physical activity offers significant benefits for delaying and reversing aging and age-related disorders.
  • Targeting mitochondrial health and exerkine pathways presents a promising avenue for therapeutic interventions.
  • Further research into these molecular mechanisms can lead to novel strategies for managing age-related diseases.