Figure 2. Cytotoxicity of Dmab and ZOL in human CG5 cells. Cell viability of the human breast cancer cell line CG5 after treatment with increasing concentrations (0.31 to 160 μM) of Dmab (○) or ZOL (•) for (A) 24 h, (B) 48 h and (C) 72 h was evaluated by MTT assay and expressed as percentage of untreated cells. Each point is the mean of at least four different replicate experiments (± S.D.). Statistical analysis: p < 0.01, untreated vs. 80 μM and 160 μM ZOL treated cells at 48 h; p < 0.001, untreated vs. 40 μM, 80 μM and 160 μM ZOL treated cells at 72 h.