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Related Concept Videos

Peroxisomes and Mitochondria01:30

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Peroxisomes and mitochondria are two important oxygen-utilizing organelles in eukaryotic cells. Mitochondria carry out cellular respiration—the process that converts energy from food into ATP. Peroxisomes carry out a variety of functions, primarily breaking down different substances, such as fatty acids.
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Mitochondria01:37

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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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Aging01:26

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Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
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Translocation of Proteins into the Mitochondria01:19

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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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The Effect of Aging on Tissues01:19

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Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
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Changes in the Appendicular Skeleton with Age01:09

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The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
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Targeting Mitochondria to Counteract Age-Related Cellular Dysfunction.

Corina T Madreiter-Sokolowski1, Armin A Sokolowski2, Markus Waldeck-Weiermair3

  • 1Molecular Biology and Biochemistry, Gottfried Schatz Research Center, Medical University of Graz; Neue Stiftingtalstraße 6/6, 8010 Graz, Austria. corina.madreiter@medunigraz.at.

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Mitochondria are crucial for cellular aging and function. Targeting mitochondrial activity offers potential therapeutic strategies to combat age-related decline and diseases.

Keywords:
agingaspirincaloric restrictioncaloric restriction mimeticsexercisemitochondriapolyphenols

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Area of Science:

  • Cellular Biology
  • Gerontology
  • Mitochondrial Biology

Background:

  • Cellular senescence involves loss of homeostasis, leading to physiological decline and aging-associated diseases.
  • Mitochondria are vital for cellular energy, differentiation, cell cycle control, signaling, and calcium regulation, but their function is complex during aging.
  • Mitochondrial oxidative phosphorylation (OXPHOS) produces ATP but also reactive oxygen species (ROS), and mitochondrial function is linked to calcium homeostasis and shape changes with age.

Purpose of the Study:

  • To review the critical role of mitochondria in cellular aging.
  • To explore the impact of mitochondrial dysfunction on age-related cellular decline.
  • To discuss mitochondria as promising therapeutic targets for age-related dysfunction.

Main Methods:

  • Literature review of studies on mitochondria and cellular senescence.
  • Analysis of the relationship between mitochondrial function and aging processes.
  • Examination of therapeutic interventions targeting mitochondrial pathways.

Main Results:

  • Mitochondrial function, including OXPHOS, ROS production, calcium handling, and morphology, is significantly altered during aging.
  • These age-related mitochondrial alterations contribute to cellular senescence and dysfunction.
  • Interventions like caloric restriction, exercise, metformin, aspirin, and polyphenols show potential in modulating mitochondrial function to delay aging.

Conclusions:

  • Mitochondria play a central role in the aging process and age-related diseases.
  • Targeting mitochondrial function presents a promising therapeutic avenue for mitigating cellular aging and dysfunction.
  • Further research into mitochondrial manipulation could lead to interventions against age-associated disorders.