on gastric cancer cell chemosensitivity to 5-FU. (A). MGC-803 cells were seeded in 96-well plates and treated with different concentrations of 5-FU for 48 h. Cell viability was measured using MTT assays. (B). IC50 of gastric cancer cells (SGC 7901, MGC-803 and AGC) transfected with LEIGC-shRNA vector (shRNA) and scrambled shRNA vector (NC1), *P < 0.05.