Figure 6. SHH pathway in CD133+ GBM cells in TMZ resistance.
PTCH1, Gli1 and MDR1 were knocked down with targeted siRNA in U87 and T98G CD133+ cells. The efficiency of the knockdowns was confirmed by real time PCR (left). Knock-down cells were then treated with 200 μM TMZ. After 72 h, cell viability was assayed by CytoTox 96® LDH release (center/right). The results are shown as the mean ± SD, n ¼ 4.