SBF2 and low grade glioma: Next, we analyzed lncSBF2-AS1 in TCGA database of GBM and found that lncSBF2-AS1 level was higher in GBM than low-grade gliomas (LGG), and high SBF2-AS1 expression correlated with poor survival in GBM patients (Additional file 2 Figure S1E and F).