p53 status in stromal fibroblasts modulates tumor growth in an SDF1-dependent manner

Yoseph Addadi, Neta Moskovits, Dorit Granot, Guillermina Lozano, Yaron Carmi, Ron N. Apte, Michal Neeman, Moshe Oren

Research output: Contribution to journalArticlepeer-review

74 Scopus citations

Abstract

The p53 tumor suppressor exerts a variety of cell-autonomous effects that are aimed to thwart tumor development. In addition, however, there is growing evidence for cell nonautonomous tumor suppressor effects of p53. In the present study, we investigated the impact of stromal p53 on tumor growth. Specifically, we found that ablation of p53 in fibroblasts enabled them to promote more efficiently the growth of tumors initiated by PC3 prostate cancer-derived cells. This stimulatory effect was dependent on the increased expression of the chemokine SDF-1 in the p53-deficient fibroblasts. Notably, fibroblasts harboring mutant p53 protein were more effective than p53-null fibroblasts in promoting tumor growth. The presence of either p53-null or p53-mutant fibroblasts led also to a markedly elevated rate of metastatic spread of the PC3 tumors. These findings implicate p53 in a cell nonautonomous tumor suppressor role within stromal fibroblasts, through suppressing the production of tumor stimulatory factors by these cells. Moreover, expression of mutant p53 by tumor stroma fibroblasts might exert a gain of function effect, further accelerating tumor development.

Original languageEnglish
Pages (from-to)9650-9658
Number of pages9
JournalCancer Research
Volume70
Issue number23
DOIs
StatePublished - 1 Dec 2010

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