LINC00173-knockdown decreases DDP resistance in DDP-resistant HCC cells by targeting miR-641. (A) RT-qPCR analysis of relative miR-641 expression in Huh7/DDP and Hep3B/DDP cells transfected with the NC inhibitor or miR-641 inhibitor. (B) RT-qPCR analysis of relative miR-641 expression in Huh7/DDP and Hep3B/DDP cells transfected with shNC, shLINC00173 or shLINC00173+miR-641 inhibitor. Cell Counting Kit-8 analysis to determine the IC50 value of (C) Huh7/DDP and (D) Hep3B/DDP cells transfected with shNC, shLINC00173 or an shLINC00173+miR-641 inhibitor. TUNEL analysis (magnification, ×100) revealed the apoptosis of (E) Huh7/DDP and (F) Hep3B/DDP cells transfected with shNC, shLINC00173 or shLINC00173+miR-641 inhibitor. *P<0.05. DDP, cisplatin; miR, microRNA; HCC, hepatocellular carcinoma; RT-qPCR, reverse transcription-quantitative PCR; NC, negative control; sh, short hairpin; IC50, half maximal inhibitory concentration.