Figure 1.

Expression of VEGF by immunochemistry. This analysis demonstrated that few cells were stained by VEGF in the cortex of (A) sham-surgery rats, and VEGF expression was only observed in (Aa) periventricular regions and (Ab) choroid plexuses. However, VEGF was significantly expressed in the cortex of the irradiated hemisphere 8 weeks after GKS (B) and was predominantly located in neurons (Ba). VEGF, vascular endothelial growth factor. Magnification: A, ×40; a1, ×400; a2, ×400; B, ×40; b, ×400,