Effect of DCM-DS on the viability of MCF-7 breast cancer and non-tumorigenic MCF10A cells as determined by MTT assay. Cytotoxic effect of DCM-DS was evaluated on (A) MCF-7 and (B) MCF-10A cells. The extract was cytotoxic to the cells in a dose- and time-dependent manner. (C) Antiproliferative effect of Tamoxifen on MCF-7 cells . Each data point represents the mean of three independent experiments ± SD. *significantly different from the control (p < 0.05).