SLC2A4RG down-regulates CDK1 in GBM cell lines. (A) The cell cycle distribution of U87 and U251 glioma cells after empty vector, p-G and p-T overexpression. The level of cell cycle-related genes (CDK1, CDK2, E2F1 and Myc) were determined by q-PCR (B) and western blot (C) analyses. Actin was used as an endogenous control. Values are means ± SD. *, p < 0.05; **, p < 0.01; ***, p < 0.001.