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Analysis of the expression of TREM2 ligand ApoE after PPT. (A–I) Representative images of double immunofluorescence combining ApoE (red) and Iba1 (green) in the NL DG (A–C) and at 2 dpI (D–F) and 3 dpl (G–I) after PPT. Note that ApoE expression could be observed on astrocyte-like cells (empty arrowheads), but not in microglia (white arrows) in all the time-points. Scale bar (A–I) = 10 μm.
