To further verify the effect of β-catenin on HDGF expression in CRC cells, HDGF and β-catenin protein expressions in HCT116 were induced by 100ng/ml human recombinant Wnt3a (R&D SYSTEMS) and inhibited by 200ng/ml human recombinant DKK1 (R&D SYSTEMS) for 48 hours by Western blot analysis, respectively (Figure 7F). Here, DKK1 is linked to colorectal carcinoma.