Figure 1.

Effect of MTE on HUVEC viability. The cells were treated with 0, 2.5, 5 and 7.5 mg/ml of MTE for 24 h. The cell viability was determined by the MTT assay. The data were normalized to the viability of the control cells (100%, treated with 0.5% DMSO as vehicle). Data are the mean ± SD (error bars) from three independent experiments. ^*P<0.01, vs. control cells. MTE, Marsdenia tenacissima extract; HUVEC, human umbilical vein endothelial cell; MTT, 3-(4,5-dimethylthiazol-2-yl)-2, 5-diphenyl tetrazolium bromide.