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Related Concept Videos

Aging01:26

Aging

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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.
Cellular Clock Theory
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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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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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Cellular senescence: beneficial, harmful, and highly complex.

Darren J Baker1,2,3,4, Masashi Narita5,6, Pura Muñoz-Cánoves7,8

  • 1Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN, USA.

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Cellular senescence, the process of cell aging, has dual roles in health and disease, influencing tissue repair, aging, and pathology. Research is advancing the identification and targeting of senescent cells and their secreted factors.

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Area of Science:

  • Gerontology
  • Cell Biology
  • Molecular Biology

Background:

  • Cellular senescence's role in physiology, aging, and disease is increasingly recognized.
  • Senescent cells exhibit both beneficial and detrimental effects post-tissue injury.
  • Senescence is critical for healthy physiology but also drives aging and certain pathologies.

Discussion:

  • Advances in identifying senescent cells in slow-proliferating tissues like the brain and cardiovascular system.
  • Novel isolation techniques enhance understanding of senescent cell properties.
  • Inter-organ communication via the senescence-associated secretory phenotype (SASP) is a key research area.

Key Insights:

  • The SASP contributes to tumor development and SARS-CoV-2 variant evolution.
  • Dietary macronutrients impact senescent cells in mice.
  • Senolytics and senomorphics offer targeted therapeutic strategies.

Outlook:

  • Further research into senescent cell biology will refine understanding of aging and disease.
  • Targeting senescent cells and SASP components holds therapeutic potential.
  • Continued investigation into senolytics and senomorphics is crucial.