Figure 4. Effects of XNT on vascular endothelial growth factor (VEGF) expression in retinas. A, Representative photomicrographs of retinas of control rats (CTRL), hyperglycemic untreated rats (HG), and hyperglycemic treated rats (HG+XNT). The white arrows show VEGF-positive expression. B, Quantification of VEGF expression in retinas. No significant differences were observed among the groups (one-way ANOVA).