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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 the telomeric...

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 the telomeric...

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Related Experiment Video

Updated: Jun 19, 2026

Saturated Fatty Acids Induce Ceramide-associated Macrophage Cell Death

Saturated Fatty Acids Induce Ceramide-associated Macrophage Cell Death

Published on: October 31, 2017

Ceramide induces endothelial cell senescence.

Mark E Venable¹, Xinhe Yin

¹Biology Department, Appalachian State University, Boone, NC 32027, USA. venableme@appstate.edu

Cell Biochemistry and Function

|October 21, 2009

Summary

Ceramide, a lipid molecule, triggers cellular senescence in vascular endothelial cells. This finding suggests ceramide is a general mediator of aging in cells.

Area of Science:

Cell Biology
Biochemistry
Aging Research

Background:

Cellular senescence is a state of irreversible growth arrest.
Ceramide has been implicated as a potential mediator of replicative senescence.
Understanding senescence mechanisms is crucial for aging and disease research.

Purpose of the Study:

To investigate if ceramide induces senescence in vascular endothelial cells.
To determine the role of endogenous ceramide levels during endothelial cell aging.

Main Methods:

Human umbilical vein endothelial cells (HUVECs) were cultured to various population doubling levels.
Endogenous ceramide levels were quantified during cellular aging.
Low-passage HUVECs were treated with exogenous C(6)-ceramide to assess its effects.

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Techniques to Induce and Quantify Cellular Senescence

Techniques to Induce and Quantify Cellular Senescence

Published on: May 1, 2017

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Last Updated: Jun 19, 2026

Saturated Fatty Acids Induce Ceramide-associated Macrophage Cell Death

Saturated Fatty Acids Induce Ceramide-associated Macrophage Cell Death

Published on: October 31, 2017

Techniques to Induce and Quantify Cellular Senescence

Techniques to Induce and Quantify Cellular Senescence

Published on: May 1, 2017

Main Results:

Endogenous ceramide levels significantly increased (2.4-fold) at the onset of senescence in HUVECs.
Chronic exposure to exogenous C(6)-ceramide induced a senescent phenotype in HUVECs.
This phenotype included inhibited cell proliferation, reduced DNA replication, and increased senescence-associated beta-galactosidase activity.

Conclusions:

Ceramide effectively induces senescence in vascular endothelial cells.
This study provides evidence for ceramide as a general mediator of cellular senescence across different cell types.
These findings highlight the role of ceramide in the aging process of endothelial cells.