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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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Delivery Pathways to the Lysosome01:36

Delivery Pathways to the Lysosome

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Eukaryotic cells use different mechanisms to eliminate toxic waste obsolete and worn-out substances. Lysosomes play a pivotal role in this, and hence, these substances are carried to the lysosome from other parts of the cell and extracellular space through different pathways. The most elaborately studied pathways to the lysosome are the endocytic pathways.
Endocytosis
In endocytosis, the cell membrane takes up macromolecules and particles from the surrounding medium. Clathrin-mediated...
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Autophagic Cell Death01:18

Autophagic Cell Death

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Christian de Duve discovered “autophagy,” a process in which cellular components are engulfed by membrane-bound organelles called autophagosomes. The autophagosomes then fuse with lysosomes to digest the enclosed contents. Autophagy is generally activated in cells to prevent cell death. However, cell death is triggered when the damage is beyond repair.
Autophagy and Apoptosis
Autophagy can activate apoptosis. In normal conditions, the autophagy activating protein Beclin-1 and...
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Mitochondria01:37

Mitochondria

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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

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

The Effect of Aging on Tissues

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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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Related Experiment Video

Updated: Apr 14, 2026

Assessing Lysosomal Alkalinization in the Intestine of Live Caenorhabditis elegans
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Assessing Lysosomal Alkalinization in the Intestine of Live Caenorhabditis elegans

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Autophagy and aging.

Nuria Martinez-Lopez1, Diana Athonvarangkul, Rajat Singh

  • 1Department of Medicine and Department of Molecular Pharmacology, Albert Einstein College of Medicine, 10461, Bronx, NY, USA.

Advances in Experimental Medicine and Biology
|April 29, 2015
PubMed
Summary

Autophagy, a cellular quality control process, is vital for healthspan. Activating autophagy may help maintain cellular health and prevent age-associated diseases.

Area of Science:

  • Cellular Biology
  • Molecular Biology
  • Gerontology

Background:

  • Autophagy is a conserved cellular quality control pathway essential for degrading damaged proteins and organelles.
  • Beyond quality control, autophagy regulates cellular differentiation, fuel utilization, and cell death.
  • Dysfunctional autophagy is linked to age-related diseases like neurodegeneration and metabolic disorders.

Purpose of the Study:

  • To describe macroautophagy and chaperone-mediated autophagy.
  • To discuss the association between autophagy pathway alterations and age-associated disorders.
  • To explore autophagy activation as a strategy for healthspan maintenance.

Main Methods:

  • Literature review and synthesis of current research on autophagy pathways.

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In Situ Immunofluorescent Staining of Autophagy in Muscle Stem Cells
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Assessing Autophagic Flux by Measuring LC3, p62, and LAMP1 Co-localization Using Multispectral Imaging Flow Cytometry
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Assessing Autophagic Flux by Measuring LC3, p62, and LAMP1 Co-localization Using Multispectral Imaging Flow Cytometry

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  • Analysis of the role of autophagy in cellular homeostasis and aging.
  • Discussion of the implications of autophagy dysfunction in age-related pathologies.

    • Main Results:

    • Two primary autophagy pathways, macroautophagy and chaperone-mediated autophagy, are detailed.
    • Compromised autophagy is implicated in various age-associated conditions.
    • Maintaining cellular cleanliness through autophagy activation is a potential healthspan strategy.

    Conclusions:

    • Autophagy is crucial for cellular homeostasis and preventing age-related diseases.
    • Understanding and modulating autophagy pathways can impact healthspan.
    • Activating autophagy presents a promising therapeutic avenue for healthy aging.