Fig. 2: DKK1-CKAP4 signaling is required for FOXM1 expression.

Left panels: lysates of S2-CP8 cells and TE-5 cells stably expressing control shRNA or DKK1 shRNAs (A), control shRNA, DKK1 shRNA, DKK1 shRNA and DKK1-FLAG, or DKK1 shRNA and DKK1ฮCRD1-FLAG (B), control shRNA or CKAP4 shRNAs (C), or control shRNA, CKAP4 shRNA, or CKAP4 shRNA and CKAP4-HA (D) were probed with the indicated antibodies. Clathrin was used as a loading control. Right panels: the mRNA levels of FOXM1 in the S2-CP8 cells and TE-5 cells shown in the left panels were measured by quantitative RT-PCR and normalized to GAPDH. The results are shown as fold-changes compared to the mRNA level of control shRNA-expressing cells and are expressed as meansโยฑโSD from three independent experiments. *Pโ<โ0.05; **Pโ<โ0.01 (Studentโs t test).