In MG63 human osteosarcoma cells, the mRNA levels of GLUT1, GLUT2, and GLUT3, but not GLUT 4, 6, 8, 10, or 12, were increased after a 6-h treatment of CoCl2 (100 μM) (Figure 2A). This evidence concerns the gene SLC2A1 and osteosarcoma.