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Glioma tracking cells are mainly A2B5+ progenitor cells. Immunostaining of A2B5 (green) and β-gal (red) with brain sections at day 7 post-implantation of LacZ-BM-NSCs showing the contralateral side (top) and the injection side (bottom). The merged pictures show that brain tumors tropic BM cells, as well as residual BM cells along the needle tracts, express progenitor marker A2B5. DAPI staining of nuclei reveals tumor boundary (dashed line) and injection site needle tracts (bottom).
