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Related Concept Videos

Cellular Injury I: Introduction01:00

Cellular Injury I: Introduction

Cellular injury occurs when a cell cannot maintain homeostasis or adapt to stressors such as hypoxia, toxins, or trauma. Depending on severity and duration, injury may be reversible, allowing recovery, or irreversible, leading to cell death.General Mechanisms of Cell InjuryAlthough causes vary, most cellular injuries arise from a few key mechanisms that disrupt essential functions and often amplify one another. Cell survival depends on the extent and balance of these disturbances.ATP depletion...
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...
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...
Cellular Injury IlI: Cellular Death01:11

Cellular Injury IlI: Cellular Death

Cell death is the irreversible loss of cellular structure and function, representing the final stage of severe injury. It plays a key role in both normal physiology and disease.Types of Cell DeathThe two main types are necrosis and apoptosis, though others like necroptosis and pyroptosis also exist.Necrosis:Necrosis is an unregulated form of cell death caused by severe injury such as trauma, toxins, or ischemia. It is characterized by cell swelling, membrane loss, rupture, and leakage 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...

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Updated: Jun 13, 2026

Techniques to Induce and Quantify Cellular Senescence
06:51

Techniques to Induce and Quantify Cellular Senescence

Published on: May 1, 2017

Inflammatory networks during cellular senescence: causes and consequences.

Adam Freund1, Arturo V Orjalo, Pierre-Yves Desprez

  • 1Buck Institute for Age Research, 8001 Redwood Boulevard, Novato, CA 94945, USA.

Trends in Molecular Medicine
|May 7, 2010
PubMed
Summary

Cellular senescence, a process linked to aging, significantly increases proinflammatory factors, contributing to chronic inflammation and age-related diseases. Understanding these factors and their regulation is key to combating inflammation.

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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

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Last Updated: Jun 13, 2026

Techniques to Induce and Quantify Cellular 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
13:59

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

Area of Science:

  • Gerontology
  • Immunology
  • Cell Biology

Background:

  • Chronic inflammation is linked to aging and age-related diseases like cancer and osteoarthritis.
  • Immune cell activation is a known driver of chronic inflammation.
  • Cellular senescence, a stress response, also increases with age and inflammation.

Purpose of the Study:

  • To identify proinflammatory factors secreted by senescent cells.
  • To describe the impact of these factors on tissue homeostasis.
  • To summarize regulatory pathways of the senescent proinflammatory phenotype.

Main Methods:

  • Literature review and synthesis of studies on cellular senescence and inflammation.
  • Analysis of secreted factors associated with the senescent phenotype.
  • Examination of pathways regulating senescence-associated inflammation.

Main Results:

  • Senescent cells exhibit a proinflammatory phenotype due to increased secretion of specific factors.
  • These secreted factors negatively impact tissue homeostasis.
  • Key regulatory pathways include DNA damage response, microRNAs, transcription factors, kinases, and chromatin remodeling.

Conclusions:

  • Cellular senescence is a significant contributor to chronic inflammation in aging.
  • Targeting senescent cells or their secreted factors may offer therapeutic strategies for age-related diseases.