PTGDR and gastric cancer: To determine whether SBF2-AS1 depletion-mediated inhibitory effects on GC cells were indeed through targeting miR-545/EMS1, a rescue experiment was performed in SGC7901 cells transfected with si-NC, si-SBF2-AS1, si-SBF2-AS1+miR-545 inhibitor (anti-miR-545) or si-SBF2-AS1+overexpression EMS1 plasmid.