Figure 3

Combination dose-effect of PEITC and taxol on MCF7 and MDA-MB-231 breast cancer cells. Cells were cultured in the presence of PEITC and taxol at various concentrations as indicated in the tables for 48 hours. The number of cells were then enumerated. The dose-effect plot is done using Calcusyn software. CI: combination index. Fa: fraction affected; Index >1.0 indicates antagonism, index <1.0 indicates synergism