Our results showed that the expression levels of Cyclin D1 and NF‐ĸBp65 in SKOV3/DDP cell line were higher than those in SKOV3 cell line (Figure 4A–C), suggesting that the elevated expression of Cyclin D1 and NF‐ĸBp65 may be related to drug resistance in ovarian cancer cells. Here, CCND1 is linked to ovarian cancer.