15d-PGJ2 induces apoptosis PPARγ-dependently in neuroblastoma [27] and hepatic myofibroblasts [28], whereas PPARγ-independently in colorectal cancer [29], breast cancer [30], hepatocellular carcinoma [31] and prostate and bladder carcinoma [32]. This evidence concerns the gene PPARG and urinary bladder carcinoma.