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Related Concept Videos

Replicative Cell Senescence02:15

Replicative Cell Senescence

Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
Replicative Cell Senescence02:15

Replicative Cell Senescence

Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
Mitochondria01:37

Mitochondria

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,...
Cellular Adaptation I: Introduction and Atrophy01:23

Cellular Adaptation I: Introduction and Atrophy

Cells can adapt to environmental changes to maintain function and avoid injury, a process called cellular adaptation. Adapted cells exist in a reversible intermediate state with changes in size, number, phenotype, metabolism, or function. These responses help cells meet altered physiological or pathological demands; for example, enlargement of breast and uterine tissues during pregnancy. Early adaptations may enhance function, but persistent stress eventually causes tissue damage.Types of...
The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

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...
Aging01:26

Aging

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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Related Experiment Video

Updated: Jun 4, 2026

A Quantitative Measurement of Reactive Oxygen Species and Senescence-associated Secretory Phenotype in Normal Human Fibroblasts During Oncogene-induced Senescence
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A Quantitative Measurement of Reactive Oxygen Species and Senescence-associated Secretory Phenotype in Normal Human Fibroblasts During Oncogene-induced Senescence

Published on: August 12, 2018

Four faces of cellular senescence.

Francis Rodier1, Judith Campisi

  • 1The Research Centre of the University of Montreal Hospital Centre/Institut du Cancer de Montréal, Montreal, Quebec, Canada.

The Journal of Cell Biology
|February 16, 2011
PubMed
Summary

Cellular senescence, a process halting cell growth, also impacts tissue repair and inflammation. Understanding senescence is key to harnessing its benefits while mitigating risks in cancer and aging.

Area of Science:

  • Cellular and Molecular Biology
  • Oncology
  • Aging Research

Background:

  • Cellular senescence is a state of irreversible cell cycle arrest.
  • Initially recognized for its role in tumor suppression, its functions are now understood to be more complex.
  • Senescence influences various physiological and pathological processes.

Purpose of the Study:

  • To explore the multifaceted roles of cellular senescence beyond tumor suppression.
  • To investigate the involvement of senescence in tissue repair, aging, and cancer promotion.
  • To highlight the dual nature of senescence in biological processes.

Main Methods:

  • Review of existing literature on cellular senescence.
  • Analysis of experimental data linking senescence to different biological outcomes.

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SA-β-Galactosidase-Based Screening Assay for the Identification of Senotherapeutic Drugs

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Last Updated: Jun 4, 2026

A Quantitative Measurement of Reactive Oxygen Species and Senescence-associated Secretory Phenotype in Normal Human Fibroblasts During Oncogene-induced Senescence
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A Quantitative Measurement of Reactive Oxygen Species and Senescence-associated Secretory Phenotype in Normal Human Fibroblasts During Oncogene-induced Senescence

Published on: August 12, 2018

Techniques to Induce and Quantify Cellular Senescence
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Techniques to Induce and Quantify Cellular Senescence

Published on: May 1, 2017

SA-β-Galactosidase-Based Screening Assay for the Identification of Senotherapeutic Drugs
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SA-β-Galactosidase-Based Screening Assay for the Identification of Senotherapeutic Drugs

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  • Comparative study of senescence in various contexts like cancer, aging, and tissue regeneration.

    • Main Results:

    • Cellular senescence not only suppresses tumors but also promotes tissue repair.
    • Senescence contributes to inflammation associated with aging and cancer progression.
    • The senescence response exhibits opposing effects in different biological contexts.

    Conclusions:

    • Cellular senescence plays a complex, context-dependent role in health and disease.
    • Harnessing the beneficial aspects of senescence while controlling its detrimental effects is a critical challenge.
    • Further research is needed to fully elucidate and exploit the senescence pathway.