PTPN14 and gastric cancer: In the present study, we confirmed that miR-217 was decreased in gastric cancer tissues of patients with GC, and up-regulation of miR-217 reduced the migration and invasion of gastric cancer cells through directly binding to tyrosine–protein phosphatase non-receptor type 14 (PTPN14)-3′UTR, and miR-217-induced the down-regulation of PTPN14 suppressed the EMT in gastric cancer cells.