LRP6 and prostate cancer: Niclosamide and silibinin inhibit LRP6 expression and phosphorylation, block Wnt3a-induced β-catenin accumulation, and inhibit Wnt/β-catenin signaling in HEK293 cells, prostate cancer PC-3 and DU145 cells, and breast cancer MDA-MB-231 and T-47D cells [111, 112].