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Updated: May 20, 2025
06:51
Techniques to Induce and Quantify Cellular Senescence
Published on: May 1, 2017
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RIG-I-driven CDKN1A stabilization reinforces cellular senescence.
Cui Wang1,2,3, Xiaoyu Jiang4,3, Hong-Yu Li5,3
1China National Center for Bioinformation, Beijing, 100101, China.
Science China. Life Sciences
|March 26, 2025
Summary
Retinoic acid-inducible gene-I (RIG-I) accumulation drives cellular senescence by stabilizing CDKN1A mRNA. Inhibiting RIG-I in stem cells prevents aging, suggesting new therapeutic targets for age-related diseases.
Area of Science:
- Immunology
- Cellular Biology
- Aging Research
Background:
- The innate immune system is vital for pathogen defense but its role in aging is unclear.
- Retinoic acid-inducible gene-I (RIG-I) is a key antiviral immune mediator with an unknown function in stem cell senescence.
Purpose of the Study:
- To investigate the role of RIG-I in cellular senescence.
- To elucidate the molecular mechanisms by which RIG-I influences aging.
Main Methods:
- Analysis of RIG-I levels in cellular aging models.
- CRISPR/Cas9-mediated RIG-I deletion and pharmacological inhibition in human mesenchymal stem cells (hMSCs).
- RNA immunoprecipitation (RIP) to identify RIG-I mRNA targets.
Main Results:
- RIG-I levels increase during cellular aging and drive senescence.
- RIG-I deletion or inhibition in hMSCs confers resistance to senescence.
- RIG-I binds to and stabilizes CDKN1A mRNA, leading to increased p21Cip1 expression and senescence.
Conclusions:
- RIG-I acts as a post-transcriptional regulator of cellular senescence.
- RIG-I accumulation is a driver of aging.
- Targeting RIG-I may offer a strategy for mitigating age-related diseases.
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