TP53 and cancer: Some reports suggest that the BH3-only protein Puma has important roles in p53-dependent and -independent apoptosis in human cancer cells and mediates cell death through the Bcl-2 family proteins Bax/Bak and the mitochondrial pathway.5,6 Our studies also reveal that Puma upregulation induces cell apoptosis in chemoresistant ovarian cancer cells,7,8 confirming the requisite role of Puma in chemosensitivity.