Selective activation of p53-mediated tumour suppression in high-grade tumours
2010
p53 is an important tumour suppressor gene. Two papers now show in a Kras-driven lung cancer model that p53-mediated tumour suppression is only engaged late during tumour progression, when the Kras oncogenic signal reaches a threshold sufficient to activate the ARF–p53 pathway. Therefore, p53 re-expression in p53-deficient lung tumours does not restrict early stages of tumorigenesis, but induces tumour regression of more aggressive tumours.
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