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Techniques to Induce and Quantify Cellular Senescence
Published on: May 1, 2017
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Dynamic transcriptome profiling in DNA damage-induced cellular senescence and transient cell-cycle arrest
Zhen Zhao1, Qiongye Dong1, Xuehui Liu1
1Ministry of Education Key Laboratory of Bioinformatics, Center for Synthetic and System Biology, BNRist, Department of Automation, Tsinghua University, Beijing 100084, China.
Genomics
|August 4, 2019
Summary
DNA damage can cause cellular senescence or transient cell-cycle arrest. This study reveals key genetic regulators and pathways, like cell cycle and DNA repair, that determine cell fate after DNA damage response.
Area of Science:
- Molecular Biology
- Genetics
- Cell Biology
Background:
- Cellular senescence is a state of irreversible cell cycle arrest linked to aging and diseases.
- DNA damage is a significant factor in cellular senescence and aging.
- The genetic mechanisms dictating cell fate (senescence vs. transient arrest) after DNA damage are not fully understood.
Purpose of the Study:
- To explore transcriptomic differences between DNA damage-induced cellular senescence and transient cell-cycle arrest.
- To identify key regulatory factors influencing cell fate decisions following DNA damage response.
- To gain genome-wide insights into the molecular mechanisms of senescent cell fate.
Main Methods:
- High-resolution time-course analysis of gene expression.
- Comparative transcriptomic analysis of cells undergoing DNA damage response leading to senescence or transient arrest.
Main Results:
- Distinct differential gene expression patterns were observed between cellular senescence and transient cell-cycle arrest.
- Key pathways, including cell cycle, DNA repair, and cholesterol metabolism, showed characteristic differential responses.
- Several transcription factors were predicted to be crucial regulators of cell cycle and DNA repair.
Conclusions:
- This study elucidates the molecular mechanisms underlying cell fate decisions after DNA damage.
- Identified regulatory factors and pathways provide targets for understanding and potentially manipulating senescence.
- Genome-wide insights contribute to understanding aging and senescence-related diseases.
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