Cell viability assays were performed as described in the
Materials and Methods after cells were treated with temozolomide (A), cisplatin (B), adriamycin (C), taxol (D), TRAIL (E), bafilomycin A1 (F), thapsigargin (G), and MG132 (H). Means ± SD from at least three independent experiments are shown as relative indexes after normalization to those of individual control cells treated with DMSO.