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SA-β-Galactosidase-Based Screening Assay for the Identification of Senotherapeutic Drugs
Published on: June 28, 2019
Senescence: the good the bad and the dysfunctional
Ermira Pazolli1, Sheila A Stewart
1Department of Cell Biology and Physiology, Washington University School of Medicine, Saint Louis, MO 63110, USA.
Current Opinion in Genetics & Development
|February 12, 2008
Summary
Cellular senescence, a state of permanent growth arrest, acts as a tumor suppressor. However, senescent cells can paradoxically promote nearby preneoplastic cell growth, contributing to age-related cancer incidence.
Area of Science:
- Cell Biology
- Oncology
- Gerontology
Background:
- Cellular senescence, a concept introduced by Hayflick, describes the limited replicative lifespan of normal human cells.
- Initially proposed as a tumor suppressive mechanism, senescence prevents uncontrolled cell proliferation.
Purpose of the Study:
- To review the established role of cellular senescence in tumor suppression.
- To explore the emerging understanding of senescence's dual role in cancer development.
Main Methods:
- Review of seminal and recent research on cellular senescence.
- Analysis of studies investigating the interaction between senescent cells and preneoplastic cells.
Main Results:
- Senescent cells, while not neoplastic themselves, can create a microenvironment that promotes the growth of adjacent preneoplastic cells.
- This pro-tumorigenic effect may explain the increased incidence of tumors with age.
Conclusions:
- Cellular senescence is a complex biological process with a "double-edged sword" effect on tumorigenesis.
- While preventing cancer initiation, senescence can also facilitate tumor progression in aging organisms.
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