Figure 6. Effects of Robo4 on the attachment of RF/6A and RPE cells. Cell attachment was assessed after 6 h incubation and subsequent MTT assay. 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). The absorbance of NS was set to 100%.