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Related Concept Videos

Autophagy01:27

Autophagy

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Autophagy is a self-digesting process by which a cell protects itself from threats both within and outside the cell, ranging from abnormal proteins to invading bacteria. In this process, obsolete components of the cell and invading microbes are degraded by hydrolytic enzymes active in an acidic environment of the lysosomal lumen.
An autophagic pathway consists of a series of signaling events activated in response to diverse stress and physiological conditions such as food deprivation,...
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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
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
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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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Pharmacodynamics in Geriatric Patients: Effects of Age01:27

Pharmacodynamics in Geriatric Patients: Effects of Age

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Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...
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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption01:22

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption

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As individuals age, their body's physiology evolves, affecting drug pharmacokinetics. The most apparent changes occur in the gastrointestinal tract, where an increase in gastric pH, a delay in gastric emptying, and a reduction in gastrointestinal motility are observed. Remarkably, these changes do not substantially modify the absorption of orally administered drugs, particularly those absorbed via passive diffusion.Transdermal drug delivery emerges as a highly viable method for older adults due...
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Related Experiment Video

Updated: Jan 24, 2026

Activating Autophagy by Aerobic Exercise in Mice
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Activating Autophagy by Aerobic Exercise in Mice

Published on: February 3, 2017

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Autophagy in aging and longevity.

Shi Q Wong1, Anita V Kumar1, Joslyn Mills1

  • 1Department of Molecular Biology, Cellular Biology and Biochemistry, Brown University, Providence, RI, USA.

Human Genetics
|May 31, 2019
PubMed
Summary
This summary is machine-generated.

Autophagy, a cellular recycling process, is crucial for stress response and longevity. Dysfunctional autophagy links to aging and neurodegenerative diseases, highlighting its vital role in health.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Autophagy, initially seen as bulk recycling, is now recognized as a key regulator of cellular homeostasis.
  • It involves sequestering and degrading intracellular material via lysosomes.
  • Recent advances reveal its role in metabolic and proteostatic signaling.

Purpose of the Study:

  • To review the latest literature on autophagy and lysosomes in stress response and longevity.
  • To highlight the connections between autophagy, metabolism, and aging.
  • To explore the links between autophagic dysfunction and neurodegenerative diseases.

Main Methods:

  • Literature review of recent scientific publications.
  • Analysis of studies on autophagy regulation and function.
  • Synthesis of data on autophagy's role in aging and disease.

Main Results:

  • Autophagy plays a critical role in cellular stress response and determining organismal lifespan.
  • Metabolic processes are intricately linked with the regulation of autophagy.
  • Autophagic dysfunction is associated with aging and the pathogenesis of neurodegenerative diseases.

Conclusions:

  • Autophagy is a central pathway influencing cell fate, health, and longevity.
  • Understanding autophagy's regulatory network is key to addressing age-related diseases.
  • Targeting autophagy may offer therapeutic strategies for neurodegeneration and aging.