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Fig. 3 (A) Photomicrograph of a cerebral microvessel from histologically normal human cerebral cortex, showing aquaporin-4 immunolabelled (AB3068, Chemicon) astrocyte end feet surrounding the endothelial cell walls. (B) A photomicrograph showing up-regulation of aquaporin-4 immunoreactivity in astrocyes from a grade IV astrocytoma. Scale bars = 10 μm.
