A novel series of methylene-substituted DIMs (C-DIMs), namely 1,1-bis(3'-indolyl)-1-(p-substituted phenyl)methanes containing t-butyl (DIM-C-pPhtBu) and phenyl (DIM-C-pPhC6H5) groups, activate peroxisome proliferator-activated receptor γ (PPARγ) and induce receptor-dependent and -independent growth inhibitory and pro-apoptotic responses/genes in colon, pancreatic, ovarian, prostate, bladder and breast cancer cells and/or tumors [19-25]. This evidence concerns the gene PPARG and breast carcinoma.