Figure 4. Overexpression of miR-638 promotes glioma cell migration and invasion. (A, B) U87 and U251 glioma cells were transfected with miR-638 mimics, and both cells migration and invasion were determined using transwell assays. Results represent the mean±SD for three independent experiments (**p<0.01; as determined by unpaired Student’s t-test). Scale bar = 50 μm in all panels.