Effect of LINC00152 knockdown on cisplatin sensitivity. (A) At 24 h post-transfection with si-1-LINC00152 or si-NC, COC1 cells were treated with 0, 1, 2, 4, 8, 16 or 32 µg/ml cisplatin for a further 24 h, and cell viability was assessed using the CCK-8 assay. (B) At 24 h post-transfection with si-1-LINC00152 or si-NC, COC1/DDP cells were treated with 0, 4, 8, 16, 32, 64 or 128 µg/ml cisplatin for a further 24 h, and viability was assessed using the CCK-8 assay. *P<0.05, **P<0.01 and ***P<0.001 vs. si-NC. CCK-8, Cell Counting Kit-8; si, small interfering RNA; NC, negative control.