The gut microbiome switches mutant p53 from tumour-suppressive to oncogenic.

ABSTRACT: Somatic mutations in p53, which inactivate the tumour-suppressor function of p53 and often confer oncogenic gain-of-function properties, are very common in cancer^1,2. Here we studied the effects of hotspot gain-of-function mutations in Trp53 (the gene that encodes p53 in mice) in mouse models of WNT-driven intestinal cancer caused by Csnk1a1 deletion^3,4 or Apc^Min mutation⁵. Cancer in these models is known to be facilitated by loss of p53^3,6. We found that mutant versions of p53 had contrasting effects in different segments of the gut: in the distal gut, mutant p53 had the expected oncogenic effect; however, in the proximal gut and in tumour organoids it had a pronounced tumour-suppressive effect. In the tumour-suppressive mode, mutant

SUBMITTER: Kadosh E 

PROVIDER: S-EPMC7116712 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature