IHC staining revealed that the protein expression levels of CD24, MMP11, MUC4, SERPINE1, SKP2, and TP53 in gastric cancer tissues were greater than those in normal gastric tissues, whereas the protein expression levels of CRYAB and PRKAA2 were lower in gastric cancer tissues than in normal gastric tissues (Figure 12). This evidence concerns the gene SKP2 and gastric cancer.