Testing Nature's Defenses: Inducing Cancer in the Naked Mole Rat.

Area of Science:

• Oncology
• Comparative Genomics
• Cancer Biology

Background:

• Murine models readily develop lung cancer from a single Eml4-Alk fusion.
• Naked mole rats exhibit remarkable cancer resistance.
• Understanding species-specific oncogenic drivers is crucial for cancer research.

Purpose of the Study:

• To investigate the genetic requirements for lung tumorigenesis in naked mole rats.
• To establish a novel inducible cancer model in naked mole rats.
• To explore mechanisms underlying cancer resistance.

Main Methods:

• Development of an inducible Eml4-Alk oncogene expression system in naked mole rats.
• Simultaneous genetic manipulation to inactivate Tp53 and Rb1 tumor suppressor genes.
• Monitoring tumor development and characterizing resulting lung carcinomas.

Main Results:

• Naked mole rats require simultaneous Eml4-Alk, Tp53 loss, and Rb1 loss for lung cancer induction.
• Achieved only 30% tumor penetrance even with these three oncogenic events.
• The developed model allows for the study of resistance to multiple oncogenic drivers.

Conclusions:

• Naked mole rats possess robust endogenous mechanisms conferring resistance to oncogenic transformation.
• This inducible model provides a unique platform for studying cancer resistance.
• The model is suitable for investigating rare pleomorphic lung carcinomas and potential therapeutic strategies.