Failed reprogramming of transformed cells due to induction of apoptosis and senescence impairs tumor progression in lung cancer
Pedrosa, P.; Zang, Z.; Macias, D.; Ge, J.; Denholm, M.; Dyas, A.; Nunez-Quintela, V.; Estevez-Souto, V.; Lado-Fernandez, P.; Gonzalez, P.; Gomez, M.; Martin, J. E.; Da Silva-Alvarez, S.; Munoz-Espin, D.; Collado, M.
Show abstract
Cell reprogramming to pluripotency applied to the study of cancer has identified transformation and pluripotency as two independent and incompatible cell fates. A detailed knowledge of the relationship between transformation and reprogramming could lead to the identification of new vulnerabilities and therapeutic targets in cancer. Here, we explore this interplay and find that OSKM expression limits tumor cell growth by inducing apoptosis and senescence. We identify Oct4 and Klf4 as the main individual reprogramming factors responsible for this effect. Mechanistically, the induction of cell cycle inhibitor p21 downstream of the reprogramming factors acts as mediator of cell death and senescence. Using a variety of in vivo systems, including allografts, orthotopic transplantation and KRAS-driven lung cancer mouse models, we demonstrate that OSKM expression impairs tumor growth and reduces tumor burden.
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