FIGURE 4.
RPL21 regulates the cell cycle and DNA replication via E2F1 in PANC-1 and BxPC-3 cells. (A,C) The luciferase reporter vectors (CCND1, CCNE1 and MCM2-7) were constructed using pGL-3 vectors. 1 μg reporter vector was co-transfected with 1 μg pCMV-E2F1 vector or 1 μg empty pcDNA3.1 vector (control) for each well (6-well plates) containing 6 × 105 PANC-1 and BxPC-3 cells. Luciferase activity was measured 24 h after the transfection. (B,D) The PANC-1 and BxPC-3 cells were transfected with siRNAs with lipofectamine 2000 reagent. The control, NC, siL21-1 and siL21-2 represented the untransfected, Mock-siRNA transfected, siL21-1 and siL21-2 transfected, respectively. The cells after transfection were seeded in 6-well plates at 6 × 105 cells/well, and 2 g E2F1 luciferase reporters (E2F1-promoter) were transfected using lipofectamine 2000 reagent. Luciferase activity was measured 24 h after the transfection. Each bar represents the mean ± SD of triplicate analysis. * indicates P < 0.05 compared to the control as determined by the Student’s t-test.