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Immunofluorescent double labeling for MMP-9 with glial fibrillary acid protein (GFAP; astrocyte marker), PDGFRα (oligodendrocyte precursor marker), Iba-1 (microglial marker), CD-31 (endothelial marker) or GST-π (mature oligodendrocyte marker). MMP-9 expressing cells were mainly astrocytes and oligodendrocyte precursors, and not microglia, endothelial cells or mature oligodendrocytes. (Scale bar = 20μm).
