RNF111 and gastric cancer: Based on the above results, we further investigated whether circ-RNF111 could alter GC cell progression by sponging miR-876-3p through transfecting si-NC, si-circ-RNF111, si-circ-RNF111 + anti-miR-NC, or si-circ-RNF111 + anti-miR-876-3p into AGS and SNU-638 cells.