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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.
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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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Quantifying Tissue-Specific Proteostatic Decline in Caenorhabditis elegans
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Candidate genes that affect aging through protein homeostasis.

Yair Argon1, Tali Gidalevitz

  • 1Division of Cell Pathology, Department of Pathology and Lab Medicine, The Children's Hospital of Philadelphia and the University of Pennsylvania, 3615 Civic Center Blvd., 19104, Philadelphia, PA, USA, yargon@mail.med.upenn.edu.

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Aging is complex, involving many interacting factors that affect protein homeostasis. Research shows interconnected pathways and tissue-specific effects of longevity genes, requiring multiple readouts beyond lifespan.

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Area of Science:

  • Gerontology
  • Molecular Biology
  • Genetics

Background:

  • Aging is a complex, multifactorial process involving numerous interacting mechanisms.
  • The candidate gene approach often fails to capture the full picture of organismal decline.
  • Protein homeostasis and proteome maintenance are critical aspects of aging.

Purpose of the Study:

  • To discuss the complexity of aging, focusing on protein homeostasis.
  • To examine candidate genes involved in aging pathways across different species.
  • To highlight emerging themes in aging research.

Main Methods:

  • Comparative analysis of candidate genes in invertebrates, mice, and humans.
  • Focus on pathways regulating protein homeostasis.
  • Review of recent research findings.

Main Results:

  • Aging involves interconnected pathways with pleiotropic effects.
  • Mutations and manipulations of candidate proteins show tissue-specific outcomes.
  • Candidate gene actions vary across different species.

Conclusions:

  • Understanding aging requires an integrated view beyond individual pathways.
  • Multiple readouts, beyond lifespan, are necessary to assess longevity gene manipulation.
  • The complexity of aging necessitates a holistic research approach.