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Expression of occludin in control, Alzheimer's disease (AD) and vascular dementia (VD) brains, in the frontal white matter. As compared to control brain, in AD and VD brains, occludin expression is increased in oligodendrocytes and astrocytes (brownish, immunohis-tochemical staining method with anti-occludin serum detected with avidin–biotin-peroxidase complex kit and DAB substrate). Quantification was not performed in this study.
