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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...
Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
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...
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,...

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Related Experiment Video

Updated: Jul 13, 2026

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

Methods of cellular senescence induction using oxidative stress.

Jian-Hua Chen1, Susan E Ozanne, C Nicholas Hales

  • 1Department of Clinical Biochemistry, University of Cambridge, Camgbridge, UK.

Methods in Molecular Biology (Clifton, N.J.)
|July 20, 2007
PubMed
Summary

Cellular senescence, a state of limited cell division, is linked to organismal aging. Oxidative stress can induce premature senescence, providing a valuable in vitro model for aging research.

More Related Videos

Induction and Validation of Cellular Senescence in Primary Human Cells
08:18

Induction and Validation of Cellular Senescence in Primary Human Cells

Published on: June 20, 2018

Related Experiment Videos

Last Updated: Jul 13, 2026

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

Induction and Validation of Cellular Senescence in Primary Human Cells
08:18

Induction and Validation of Cellular Senescence in Primary Human Cells

Published on: June 20, 2018

Area of Science:

  • Gerontology
  • Cell Biology
  • Molecular Biology

Background:

  • Normal human fibroblasts exhibit limited proliferation potential in vitro, leading to replicative senescence.
  • Cellular senescence is implicated as a fundamental mechanism underlying organismal aging.
  • Senescent cells accumulate with age in various tissues, supporting their role in the aging process.

Purpose of the Study:

  • To explore cellular senescence as a model for understanding the molecular mechanisms of aging.
  • To investigate the utility of oxidative stress-induced premature senescence as an in vitro aging research tool.

Main Methods:

  • Culturing normal human fibroblasts in vitro to observe replicative senescence.
  • Inducing premature senescence using oxidative stress, specifically hydrogen peroxide.
  • Comparing markers of oxidative stress-induced senescent cells with replicative senescent cells.

Main Results:

  • Replicative senescence limits fibroblast proliferation in vitro.
  • Oxidative stress reliably induces premature senescence in cells.
  • Induced premature senescent cells share indistinguishable markers with replicative senescent cells.

Conclusions:

  • Cellular senescence, particularly replicative senescence, serves as a crucial model for aging research.
  • Oxidative stress-induced premature senescence offers an efficient in vitro method for studying aging mechanisms.