SVZ GBM was also enriched by flow cytometry for cells expressing α-SMA, a marker expressed by most of our cultured CAF cells (Supplemental Table 2), with 4.9% of tumor core cells expressing α-SMA compared with 13.4% of SVZ GBM cells (P = 0.02; Figure 6D). This evidence concerns the gene ACTA1 and glioblastoma.