HOW OXIDATIVE DAMAGE TO TELOMERES PROMOTES PREMATURE CELLULAR SENESCENCE
2024
How Oxidative Damage to Telomeres Promotes Premature Cellular Senescence
publication
Author Information
Author(s): Opresko Patricia
Primary Institution: University of Pittsburgh
Hypothesis
How does oxidative damage impact telomere function and promote cellular senescence?
Conclusion
Oxidative damage to telomeres can trigger cellular senescence without necessarily shortening the telomeres.
Supporting Evidence
- Chronic oxidative damage at telomeres impairs cell growth and increases telomere shortening.
- A single induction of telomeric 8oxoG in non-disease human cells triggers cellular senescence.
- Loss of repair enzymes OGG1 and MUTYH partially rescues telomere dysfunction.
Takeaway
When telomeres get damaged by oxidative stress, it can make cells age faster, even if the telomeres don't get shorter.
Methodology
The study used a chemoptogenetic tool to induce oxidative lesions at telomeres and observed the effects on cell growth and senescence.
Digital Object Identifier (DOI)
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