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Effect of cucurbitacin B on the growth of human breast cancer cells. SKBR-3, MCF-7 and HBL-100 were treated with cucurbitacin B at final concentrations of 1, 10, 20, 40, 60, 80 and 100 μg/mL. Cell viability was determined by the MTT assay. The percentage of viable cells was calculated by defining the absorption of cells without cucurbitacin B treatment as 100%. Results are the average from three independent experiments.
