Figure 6

Immunohistochemical VEGF staining. Each of the five groups included six animals: A. One week group, occipital cortex and leptomeningeal vessels were VEGF (+), the dura mater was VEGF (±) (VEGF staining , 10 × 10); B. Two weeks group, occipital cortex soft meningeal blood vessels showed VEGF (+ +), the dura mater was VEGF (+) (VEGF staining, 10 × 10); C. three weeks group, occipital cortex and leptomeningeal vessels were VEGF (±), the dura mater was VEGF (+) (VEGF staining , 10 × 20); D. control group, occipital cortex and leptomeningeal vessels were VEGF (±) (VEGF staining , 10 × 10); E. 90 days group, dura was VEGF (+), and visible blood vessels increased in number (VEGF staining , 10 × 10); F. 90 day group, dura was VEGF (+), positive-stained granules are mainly located in vascular endothelium and vascular extracellular matrix and the number of visible blood vessels increased, lumen expansion (VEGF staining , 10 × 20).