Figure 6. The effect of knock-down or overexpression of SCRIB on the proliferation and invasiveness of gastric cancer cells. (A, B) The effect of knock-down or overexpression of SCRIB on proliferation was evaluated with an MTT assay and colony-forming assay in MKN-45 (A) and NCI-N87 cells (B). The MTT assay was performed after seeding 3,000 cells per well of a 96-well plate. The colony-forming assay was performed by plating 1,000 cells per well in a 6-well plate for ten days. The knock-down or overexpression of SCRIB was assessed via western blot for SCRIB. (C) The migration assay was performed by seeding 1x105 MKN-45 or 1x105 NCI-N87 cells in the upper chamber for 48 hours. (D) The invasion assay was performed by seeding 2x105 MKN-45 or 2x105 NCI-N87 cells in the upper chamber with Matrigel for 48 hours. The chambers were stained with DIFF-Quik staining solution, and the number of migrated or invaded cells were counted in five x200 microscopic fields in each well. **; P < 0.001.