SNAI2 and glioblastoma: Glioblastoma cells overexpressing SNAI2/Slug migrated approximately 62 μm from the edges and covered 63% of the scratch defect (Figure 4A), while control cells expressing the empty IRES-EGFP vector migrated only 39 μm from the edges and covered less than 39% of the scratch defect (Figure 4A, P < 0.00001, t-test).