Considering these observations, we assayed control and mda-9 knockdown (kd) (shmda-9) GSCs from a clinical GBM sample (VG2) using a cancer stem cell array (Human Cancer Stem Cells RT2 Profiler PCR array, Qiagen/Sabiosciences) (Figure 1B). The gene discussed is SDCBP; the disease is glioblastoma.