3-MPA-treated cells suppress translocation of β-catenin to the nucleus and MMP7 activation. a Immunoblotting analysis of β-catenin in the nuclei of 3-MPA-treated cells. β-catenin expression in the nucleus of 3-MPA-treated cells is decreased markedly compared with that in control cells. β-catenin expression in the cytoplasm does not differ significantly between 3-MPA-treated cells and control cells. b Quantification of MMP7 mRNA level in 3-MPA-treated cells by qRT-PCR analysis. MMP7 mRNA is significantly down-regulated in 3-MPA-treated cells compared with control cells. c Casein zymography analysis of MMP7 activity in 3-MPA-treated cells. Cell culture media are collected and concentrated, MMP7 activity is analyzed by casein zymography. MMP7 secretion is decreased significantly in 3-MPA-treated cells compared with control cells.