KIF15 and gastric cancer: Human GC tissues and normal tissues were analyzed. As shown in Fig. 1a, KIF15 mRNA expression level was significantly higher in GC tissues than that in the normal tissues (P < 0.001). IHC assay further verified that KIF15 protein expression levels in human GC tissues (n = 41) were significantly higher than the matched paracarcinoma tissues (P < 0.001, Fig. 1b, c).