To elucidate the biological function of lncRNA MYOSLID in GC cell lines, we transfected with siRNA, lentiviral recombinant short hairpin RNA (shRNA) vector or lentiviral recombinant overexpression plasmid, to knock down or overexpress lncRNA MYOSLID in GC cell lines SGC‐7901 and BGC‐823 (Figure 2A,B). The gene discussed is MYOSLID; the disease is gastric cancer.