The qPCR results showed that the mRNA expression of DPM2, DAB2, ANXA1, and Ki67 expression was upregulated in CD44‐positive GBM‐MG1 and GBM‐MG2 cells, whereas the mRNA expression of DPM2, DAB2, ANXA1 and Ki67 was downregulated in the absence of CD44 (Figure 3E). This evidence concerns the gene DAB2 and glioblastoma.