GOT1 and astrocytoma (excluding glioblastoma): Although GOT1 expression levels differed significantly between NN and astrocytoma, with discriminatory power to distinguish GBM from NN (ROC AUC = 0.902; 95% CI, 0.038–0.159), no significant difference of GOT1 expression levels was detected among the astrocytoma grades of malignancy (Fig. 1a).