RNF180 and gastric cancer: The malignant biological characteristics of gastric cancer cells, or the MREV of the common genes involved in the tumor progression, were used to assess the expression differences among the four MGC-803 cell lines transfected with various demethylated CpG island vectors (pCMV6-RNF180-DCpG-116, pCMV6-RNF180-DCpG-80, pCMV6-RNF180-DCpG+97, and pCMV6-RNF180-DCpG+102) and MGC-803-vehicle cell line.