Fig. 7
Wound healing assay of MDA-MB-231 cells transfected with PEI-GO:siCXCR4 complexes. MDA-MB-231 cells were allowed to migrate over a cell-free gap (bordered by the pair of black lines) after treated with PEI-GO:siCXCR4 complexes of mass ratios 0.3:1 (d), 0.5:1 (e), and 1:1 (f) for 48 h. The results were compared with untreated cells (a) and those treated with Lipofectamine 2000:siCXCR4 (b) or PEI-GO:siMOCK (c). Migrated cells per field from three independent experiments were quantitated as shown in the bar graph (g)