FOXM1 expression in gastric cancer tissues and cell lines. (A) Immunohistochemical staining for FOXM1 antibody in gastric cancer tissue: (A). Negative staining for FOXM1, ×400; (B). Weakly positive staining for FOXM1, ×400; (C). Moderately positive staining for FOXM1, ×400; (D). Strongly positive staining for FOXM1, ×400. FOXM1 expression was stained in the nuclei or cytoplasm of cells. Red arrow: cytoplasm stained; Black arrow: nuclei stained. (B) Different expressions of FOXM1 in gastric cancer cell lines: SGC-7901, AGS and MKN-28; normal gastric epithelium cell lines: GES-1 and HFE-145. There was a significant difference in FOXM1 expression between the benign and malignant gastric cell groups (P = 0.026).