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Nature Cell Biology 9, 483–485 (1 May 2007) | doi:10.1038/ncb0507-483

Barriers to Ras transformation

Gerardo Ferbeyre

It has been increasingly clear that cells on the verge of forming tumours undergo altruistic responses such as apoptosis or cellular senescence. The senescence-induced permanent proliferative arrest may confine tumours to a benign stage and recruit cells of the innate immune system for their elimination.