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Similar microglial response after the inoculation of Ctrl or AD brain extracts. Representative stainings of microgliosis (HLA-DR antibody) in the parenchyma (a-b, arrows) and in the vasculature (b, arrowheads). Staining was observed at the inoculation sites, i.e. the posterior cingulate cortex (PCC) and the corpus callosum (CC) (c-e) but not at distance of these regions. No difference was observed between the groups. Scale bars: 50 µm in a-b, 500 µm in c-e and 20 µm in inserts
