Furthermore, the Cluster B1 grouped the SLC25A18, SLC6A1, SLCO1C1, SLC35F1, SLC1A2, SLC8A3, SLC7A14, and SLC22B4 genes that were all upregulated (log2FC range: 2.12–7.13) in LGG and GBM (Figure 2; Supplementary Table S2). This evidence concerns the gene SLC6A1 and glioblastoma.