ATP1A3 and glioblastoma: We first examined the effect of CS‐6 on ATP1A3 expression in our panel of GBM cell lines, and we found that in U87, U251 and U118 cells, CS‐6 significantly increased ATP1A3 expression, while this effect was not as obvious in human normal SVG‐p12 cells as in cancer cells (Figure 5D).