δ-Catenin transfection promotes cancer cell proliferation in U251 cells. (A) MTT assays were performed after δ-catenin transfection. An increase in absorbance was observed. (B) Assessment of the clonogenic potential of δ-catenin-transfected glioma cells. The number of colonies formed by cells treated with δ-catenin was greater than for control cells (p < 0.05). Columns, mean; bars, SD.