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Related Concept Videos

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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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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Homeostasis is the maintenance of a stable internal environment within the body, which is crucial for the proper functioning of cells, tissues, organs, and organ systems. The body has various control mechanisms that work together to regulate various physiological parameters such as temperature, blood pressure, pH balance, and fluid balance, to name a few. These control mechanisms are based on feedback loops that can be either positive or negative.
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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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Induction and Validation of Cellular Senescence in Primary Human Cells
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Cellular Homeostasis and Aging.

F Ulrich Hartl1

  • 1Department of Cellular Biochemistry, Max Planck Institute of Biochemistry, 82152 Martinsried, Germany;

Annual Review of Biochemistry
|April 7, 2016
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Summary
This summary is machine-generated.

Cellular homeostasis, crucial for aging and longevity, involves protein homeostasis (proteostasis) and stress resistance. Declines in these aging processes lead to chronic diseases.

Keywords:
dietary restrictioninsulin signalingoxidative stressprotein homeostasisproteostasis

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Area of Science:

  • Molecular biology
  • Gerontology
  • Cellular biology

Background:

  • Aging and longevity are influenced by molecular and cellular signals interacting with environmental factors.
  • Key pathways like insulin-like signaling and dietary restriction response are vital for lifespan extension.
  • Protein homeostasis (proteostasis) and stress resistance are critical cellular networks involved in aging.

Purpose of the Study:

  • To review current understanding of molecular mechanisms underlying aging.
  • To explore the role of proteostasis and stress resistance in aging.
  • To discuss implications for chronic diseases.

Main Methods:

  • Review of existing literature on aging mechanisms.
  • Analysis of molecular and cellular signaling pathways.
  • Examination of proteostasis and stress resistance networks.

Main Results:

  • A decline in proteostasis capacity is a hallmark of aging.
  • Impaired proteostasis leads to cellular and tissue dysfunction.
  • This dysfunction increases susceptibility to age-related chronic diseases.

Conclusions:

  • Proteostasis and stress resistance pathways are central to aging.
  • Understanding these mechanisms is key to addressing age-related diseases.
  • Further research into molecular aging processes is warranted.