SLC2A1 and glioblastoma: In particular, GLUT-1 and GLUT-3 have been identified as proteins that are activated in glioblastoma tissues, and the mechanism by which these glucose transporters are activated, in combination with a direct or indirect decrease in the amount of glucose these transporters allow into cells, may provide insight into the reversal of the Warburg effect observed in glioblastoma [13].