PAK4 has been reported to be target regulated by miR-433 in hepatocellular carcinoma [19], miR-224 in gastric cancer [20], miR-485 in glioblastoma [21], miR-199a-3p in gastric cancer [22] and hepatocellular carcinoma [23], and miR-663 in clear cell renal cell carcinoma [24]. Here, PAK4 is linked to gastric cancer.