TOR Regulates Cell Death Induced by Telomere Dysfunction in Budding Yeast
Author Information
Author(s): Qi Haiyan, Chen Yongjie, Fu Xuan, Lin Chao-Po, Zheng X. F. Steven, Leroy F. Liu
Primary Institution: Department of Pharmacology, UMDNJ-Robert Wood Johnson Medical School, Piscataway, New Jersey, United States of America
Hypothesis
Inhibition of TOR prevents cell death induced by inactivation of Cdc13p in yeast.
Conclusion
The TOR signaling pathway specifically regulates cell death initiated by telomere dysfunction.
Supporting Evidence
- Inhibition of TOR prevents cell death but not growth arrest in yeast with dysfunctional telomeres.
- Antioxidants also prevent cell death initiated by inactivation of Cdc13p.
- Rapamycin effectively inhibits apoptotic signals such as ROS production and caspase activation.
Takeaway
This study found that a protein called TOR helps keep yeast cells alive when their telomeres are damaged, but it doesn't help with other types of cell damage.
Methodology
The study used a yeast model with a temperature-sensitive mutant to analyze the effects of TOR inhibition on cell death and various apoptotic markers.
Limitations
The study primarily focuses on yeast cells, which may not fully represent the mechanisms in higher organisms.
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website