Figure 6

Cytotoxicity of free PTX and PTX-NS in MDA MB231 cells. MDA MB231 cells were treated with increasing concentrations (0.1 – 2.0 μg/ml) of either free PTX or PTX-NS for 24 (6A) or 48 (6B) h and cell viability assessed by the MTS assay. Data are expressed as % of viable cells (mean ± SD of three separate experiments, each performed in triplicate) exposed to PTX in respect to untreated controls. ^• free PTX vs. PTX-NS, *treated vs. not treated *p < 0.05 ^••**p < 0.01