(A) Transfection efficiency of sh-NC and si-DUXAP8 in H1299 and A549 cells was detected by RT-PCR. (B) The influence of DUXAP8 on cell viability of H1299 and A549 cells was detected by CCK-8. (C) The influence of DUXAP8 on cell proliferation of H1299 and A549 cells was detected by colony formation assay. **P<0.01 vs. si-NC.