Figure A2.

Cell viability and activity analyses (HMEpCs). Viability of HMEpCs cultured in 96-well with various concentrations of DFMO was analyzed by MTT assay. DFMO concentrations of up to 24 mM were not toxic to HMEpCs. The values were relative to the control (cells cultured in unsupplemented culture medium). Data are shown as means and standard deviations of four experiments (n = 4). HMEpCs: human mammary epithelial cells, MTT: 3-(4,5-Dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide.