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Updated: Jul 5, 2026

Techniques to Induce and Quantify Cellular Senescence
06:51

Techniques to Induce and Quantify Cellular Senescence

Published on: May 1, 2017

Do tumor-suppressive mechanisms contribute to organism aging by inducing stem cell senescence?

Pier Giuseppe Pelicci1

  • 1Department of Experimental Oncology, European Institute of Oncology and FIRC Institute of Molecular Oncology, Milan, Italy. pgpelicci@ieo.it

The Journal of Clinical Investigation
|January 1, 2004
PubMed

Insights

Stem/progenitor cells maintain body balance but can become cancerous. DNA damage triggers pathways that limit their lifespan through aging or cell death, but inactivation can lead to tumors.

Area of Science:

  • Cell biology
  • Stem cell research
  • Aging and cancer

Background:

  • Stem/progenitor cells are crucial for tissue homeostasis.
  • These cells are susceptible to transformation and cancer.
  • Their lifespan is regulated by intrinsic signaling pathways.

Purpose of the Study:

  • To explore the role of stem/progenitor cells in homeostasis and disease.
  • To investigate the mechanisms limiting stem cell lifespan.
  • To understand the link between stem cell regulation and aging/cancer.

Main Methods:

  • Analysis of signaling pathways (p19-p53, p16-Rb).
  • Investigation of DNA damage responses (telomere dysfunction, environmental stresses).
  • Study of senescence and apoptosis induction in stem cells.

Main Results:

  • DNA damage activates p19-p53 and p16-Rb pathways.
  • These pathways induce senescence or apoptosis, limiting stem cell lifespan.
  • Inactivation of these checkpoints is linked to tumor formation.

Conclusions:

  • Stem/progenitor cell fate is controlled by DNA damage response pathways.
  • Pathway execution leads to aging via stem cell depletion.
  • Pathway inactivation promotes cancer by enabling uncontrolled proliferation.

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