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Replicative Cell Senescence

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...

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Updated: Mar 2, 2026

Techniques to Induce and Quantify Cellular Senescence

Techniques to Induce and Quantify Cellular Senescence

Published on: May 1, 2017

Techniques to Induce and Quantify Cellular Senescence.

Nicole Noren Hooten¹, Michele K Evans²

¹Laboratory of Epidemiology and Population Science, National Institute on Aging, National Institutes of Health; norenhootenn@mail.nih.gov.

Journal of Visualized Experiments : Jove

|May 19, 2017

Summary

This summary is machine-generated.

Cellular senescence is a state of long-term cell-cycle arrest induced by stress. This study details methods to induce and monitor senescence, crucial for understanding aging and tissue repair.

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Area of Science:

Cell Biology
Molecular Biology
Aging Research

Background:

Cellular senescence is a protective mechanism against damage, leading to cell-cycle arrest.
Senescent cells accumulate with age and influence development, repair, and disease.
Key hallmarks include SA-β-gal, altered protein levels (p16INK4A, p53, p21), DNA damage (γ-H2AX), SAHF, and SASP.

Purpose of the Study:

To provide standardized protocols for inducing replicative and DNA damage-induced senescence.
To present methods for monitoring senescence using established markers.
To enable quantification of cell cycle regulators and SASP factors.

Main Methods:

Induction of senescence via replicative exhaustion and DNA damage.
Assessment of senescence-associated β-galactosidase (SA-β-gal) activity.
Staining for DNA damage marker γ-H2AX and Senescence-associated Heterochromatin Foci (SAHF).
Quantification of cell cycle regulator and SASP factor mRNA and protein levels.

Main Results:

Established protocols for inducing two major types of cellular senescence.
Demonstrated utility of SA-β-gal, γ-H2AX, and SAHF as reliable senescence markers.
Validated methods for quantifying key molecular players in senescence.

Conclusions:

The described protocols and techniques facilitate robust assessment of cellular senescence.
These methods are applicable across diverse experimental models and tissues.
This work supports further research into the roles of senescence in health and disease.