Telomeres and Cancer: Resolving the Paradox

Area of Science:

• Genetics
• Cell Biology
• Cancer Research

Background:

• Cell cycle regulation governs cellular lifespan and is often dysregulated in cancer.
• Telomeres, chromosome ends, act as critical barriers to cellular proliferation and tumor growth.
• Telomere dysfunction initiates DNA damage responses, impacting cell cycle, inflammation, and cell death.

Purpose of the Study:

• To review the dual role of telomeres in cancer development.
• To explore how telomeres contribute to genomic instability in tumors.
• To reconcile the paradoxical functions of telomeres in carcinogenesis.

Main Methods:

• Literature review of decades of research on telomere biology and cancer.
• Analysis of recent findings on telomere-mediated genomic aberrations, including chromothripsis.
• Synthesis of current knowledge on telomere's tumor-suppressive and tumor-promoting functions.

Main Results:

• Telomeres act as tumor suppressors by initiating DNA damage responses.
• Telomeres are a significant source of genomic aberrations in cancer, such as chromothripsis.
• Telomere shortening exhibits a dual effect, potentially promoting or inhibiting cancer progression.

Conclusions:

• Telomeres possess a paradoxical role in cancer etiology, acting as both suppressors and drivers.
• Understanding telomere's dual function is crucial for reconciling their implications in cancer.
• Further research is needed to fully elucidate the complex relationship between telomeres and cancer.