Fig. 6

Expression of miR-9 was negatively correlated with microvessel density in NPC. a Representative images of immunohistochemical staining for CD31 with low or high levels of miR-9. Scale bars, 100 μm. b A negative correlation between miR-9 expression and MVD in NPC tissues. c A schematic diagram illustrated how exosomal miR-9 from NPC cells inhibited angiogenesis by targeting MDK-PDK/AKT pathway in NPC. **, P < 0.01