Figure 1.

Anti-proliferative effect of C. campestris on leukemic cells. (A) HL60 and (B) NB4 cells were treated with different concentrations of C. campestris (12.5-200 µg/ml) or As₂O₃ (50 µM) for 24-72 hr. (C) Normal polymorphnuclear cells treated with C. campestris (200-800 µg/ml) for 24 hr. The percentage of cell viability (quantitated by resazurin assay) was normalized against the negative controls for each cell type. Data are expressed as the mean ± SEM of three separate experiments. **p<0.01 and ^***p<0.001 as compared to control value