Effect of DEX treatment on the expression of glutamate uptake transporter proteins and mRNAs in C6 glioma cells. (A and B) Representative Western blot and summary bar graph depicting the relative expression levels of GLT-1 (A) and GLAST protein (B) in C6 glioma cells treated with either vehicle (Veh, 0.1% DMSO) or DEX (100 μM) for 24 or 48 hours. (C and D) Quantitative real-time PCR analysis showing the relative expression levels of GLT-1 (C) or GLAST mRNA (D) in C6 glioma cells treated with either Veh or DEX (100 μM) for 24 or 48 hours. The numbers in parentheses indicate the number of animals examined. Data are presented as means ± S.E.M. *P < 0.05 compared with Veh-treated group.