Figure 7. Effect of Robo4 on the proliferation of RF/6A and human RPE cells. RF/6A (A) and RPE (B) cell proliferation was measured with an MTT assay at 24 h, 48 h, 72 h, 96 h, and 120 h. Values are the means±SD of at least three independent experiments. Asterisks denote values significantly different from those of cells treated with Robo4 siRNA compared to NS siRNA (p<0.01). Abbreviations: control siRNA-treated cells (NS); Robo4 siRNA-treated cells (R4 siRNA).