JAG1 and gastric cancer: Expression level of miR-20b was significantly up-regulated (p = 6.35 × 10−5 and p = 1.03 × 10−4, AGS and MKN28, respectively) and miR-451a was down-regulated (p = 2.58 × 10−5 and p = 2.58 × 10−5, AGS and MKN28, respectively) in both GC cell lines compared with control gastric tissue (Figure 3).