We found that CPX inhibited the level of the transcriptional regulator E2F1 in renal cancer cells by downregulating the expression of HMGA2, which led to a decrease in the expression of cell cycle protein D1 (CyclinD1) and cell cycle-dependent kinase 6 (CDK6), causing cell cycle disorders in renal cancer cells. This evidence concerns the gene E2F1 and renal carcinoma.