Fig. 1

Effect of OL on proliferation of Tu686 and CAL-27 cells. A MTT assay was performed in Tu686 cells to determine non-toxic dose range. Cells untreated or treated with increasing doses of OL (range from 2.5-200 µg/mL) for 24 h. Cell proliferation was expressed as fold change with respect to untreated control cells (0 µg/mL). *p <0.05 vs. untreated cells. B MTT assay with CAL-27 cells using increasing doses of OL (range from 2.5-200 µg/mL) for 24 h. Cell proliferation was expressed as fold change to untreated cells. *p <0.05 vs. untreated cells