DKK1 and chondrosarcoma: Actually, we have conducted a series of experiments for activated Wnt signaling in chondrosarcoma, our results have revealed that recombinant DKK1 or overexpression of DKK1 can remarkably suppress the expression of active dephosphorylated β-catenin and TCF-reporter transcriptional activity in SW1353 chondrosarcoma cells (Figure S1).