Loss of SFRP1 increases TGF-β mediated ERK1/2 acivation and migration. TERT-pSUPER and TERT-siSFRP1 cells were serum starved overnight and treated with 5 μM U0126 (A) or 2.5 ng/ml TGF-β1 and/or 10 μM LY364947 (B). Cell lysates were analyzed for phospho-ERK1/2, ERK1/2, and Actin protein expression by western blot (A-B). TERT-pSUPER and TERT-siSFRP1 cells were plated in BD BioCoat™ control inserts and the cells capable of migrating through the 8 μm pore towards a chemoattractant were stained with 10% crystal violet and counted. Images were captured at 10X magnification (C). Experiments were repeated the number of cells within a representative 10X field from each experiment were counted and bars represent mean ± SEM cell number (D). *p < 0.05, (significantly different from vehicle treated cells using a student's t-test).