Epigenetic treatment of NUGC4 gastric cancer cell lines (wild type p53) with 5 μM 5-aza-2’-deoxycytidine or 5 μM 5-aza-2’-deoxycytidine plus trichostatin A robustly induced apoptosis in the absence of the chemotherapeutic agent CDDP. Here, TP53 is linked to gastric cancer.