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Updated: Jun 23, 2026
06:51
Techniques to Induce and Quantify Cellular Senescence
Published on: May 1, 2017
A senescence program controlled by p53 and p16INK4a contributes to the outcome of cancer therapy
Clemens A Schmitt1, Jordan S Fridman, Meng Yang
1Cold Spring Harbor Laboratory, 1 Bungtown Road, New York 11724, USA.
Cell
|May 23, 2002
Summary
Cellular senescence, controlled by p53 and p16(INK4a), impacts chemotherapy response in lymphomas. Tumors with senescence defects show poor outcomes, highlighting senescence
Area of Science:
- Oncology
- Cell Biology
- Cancer Research
Background:
- Mutations in p53 and INK4a/ARF are linked to tumorigenesis and drug resistance by inhibiting apoptosis.
- Cellular senescence is a key tumor suppressor mechanism.
Purpose of the Study:
- To investigate the role of cellular senescence in lymphoma response to chemotherapy.
- To determine the impact of p53 and INK4a/ARF mutations on chemotherapy efficacy in vivo.
Main Methods:
- Treatment of primary murine lymphomas with cyclophosphamide.
- Analysis of p53, p16(INK4a), and senescence markers.
- Assessment of tumor response and mouse prognosis.
Main Results:
- Tumors with p53 or INK4a/ARF mutations responded poorly to cyclophosphamide.
- Drug-induced cytostasis involving senescence markers was observed in tumors with an apoptotic block.
- Acquisition of p53 or INK4a mutations occurred upon progression in drug-treated tumors.
- Tumors capable of drug-induced senescence correlated with better prognosis.
Conclusions:
- Cellular senescence, regulated by p53 and p16(INK4a), is a critical determinant of chemotherapy outcome in lymphomas.
- Senescence defects in tumors lead to poor response to chemotherapy.
- Targeting or preserving senescence pathways may improve cancer treatment strategies.
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