TP53 (p53) transcriptionally regulates cytosolic caspase activators, such as APAF1, PIDD1, and NLRC4, and caspases themselves, such as CASP1, CASP6 and CASP10. These caspases and their activators are involved either in the intrinsic apoptosis pathway or in the extrinsic apoptosis pathway triggerred by death receptors or the inflammation-related cell death pyroptosis (Lin et al. 2000, Robles et al. 2001, Gupta et al. 2001, MacLachlan and El-Deiry 2002, Rikhof et al. 2003, Sadasivam et al. 2005, Brough and Rothwell 2007).