Fig. 7

a Expression levels of PLK1, CCNA2, CCNB2, and AURKA in normal and glioma samples. b PLK1, CCNA2, CCNB2, and AURKA expression levels and staining index in normal brain tissues and glioma cancer specimens. Images were obtained from the Human Protein Atlas (http://www.proteinatlas.org) online database. c Survival curve between groups with low and high PLK1 expression. The red line represents cases with high PLK1 expression, and the green line represents cases with low PLK1 expression. d Survival curve between groups with low and high CCNA2 expression. The red line represents cases with high CCNA2 expression, and the green line represents cases with low CCNA2 expression. e Survival curve between groups with low and high AURKA expression groups. The red line represents cases with high AURKA expression, and the green line represents cases with low AURKA expression. The X axis indicates overall survival time (days), and the Y axis indicates the present survival (%). The clinical data were downloaded from TCGA