SERPINE1 and glioblastoma: Spearman correlation analysis indicated that miR-486-5p was negatively relevant to both circZNF652 (R [2]=0.57, Figure 6(e)) and SERPINE1 (R [2]=0.22, Figure 6(f)), and the expression levels of circZNF652 and SERPINE1 showed positive correlations (R [2]=0.43, Figure 6(g)) in GBM tissues.