Figure 1.
Cytotoxic activity of dibucaine against human oral squamous cell carcinoma cells (A, B), glioblastoma cells (C), leukemia cells (D), and human normal oral cells (E), and human keratinocytes (F), treated for 48 h without (control), or with the indicated concentrations of dibucaine. The viable cell number was then determined by the MTT method, and expressed as control. A percentage of each value represents the mean±S.D. from 4 or 5 independent experiments. *p<0.01 †p<0.01 ‡p<0.01 compared to control (no reagent) of each cells.