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. 2021 Jul 16;156(4):333–347. doi: 10.1007/s00418-021-02015-7

Fig. 2.

Fig. 2

EBF1-expressing cells are pericytes. Double immunostaining combining the specific antibody for EBF1 and lineage-specific markers was applied for glioblastoma samples with prominent glomeruloid vascular proliferation in order to identify the phenotype of EBF1-expressing cells. Double immunostaining using endothelial markers CD31, CD34, FVIII showed no double-positive cells (a), and the same was found for monocyte/macrophage markers (CD68, CD163, Tie-2) (b) and for the histological hallmarks of tumor-derived glioma cells (GFAP, EGFRvIII, IDH1-R132H) (c). In contrast, double immunostaining using the most widely recognized mesenchymal/pericyte markers (PDGFRβ, SMA, CD146, NG2 and CD90) (d) revealed the pericyte phenotype of EBF1-expressing cells. Chromogen used to identify immunoreactivity is either brown or blue according to the corresponding label, as indicated. All images are ×40 original magnification; scale bar corresponds to 50 μm