TP53 and ovarian cancer: Furthermore, the IC50 for mifepristone in Caov-3 carrying a mutant p53 gene is indistinguishable from that of the three wild type-carrying p53 cell lines (OV2008, OV2008/C13, and A2780), further supporting the notion that the p53 background is not relevant for the growth inhibition and the lethality triggered by mifepristone in ovarian cancer cells.