(A) Flow cytometry analysis was performed to evaluate the effects of C1QTNF6 on the apoptosis of SPCA1 and A549 cells. (B) The expression level of apoptosis-related proteins caspase-3, caspase-9, Bcl-2 and BAX in SPCA1 and A549 cell lines in different groups. **P<0.01 vs. si-NC group, ##P< 0.01 vs. pc-NC group.