FOXO4 and gastric cancer: In seven of the eight cases, FOXO4 was found to have reduced expression in cancerous tissues, consistent with the results from the immunohistochemistry analysis.We further compared the relative FOXO4 mRNA and protein expression levels among 6 different GC cell lines (BGC-823, SGC7901, MKN28, AGS, 9811, and MKN45) and the immortal gastric epithelial cell line GES-1.