Effects of oridonin on intracellular ROS level of KYSE-150 cells. (A) Control KYSE-150 cells, (B) 10 μM oridonin treated KYSE-150 cells, (C) 30 μM oridonin treated KYSE-150 cells, (D) 50 μM oridonin treated KYSE-150 cells, (E) 2.5 μM MNAC and 50 μM oridonin treated KYSE-150 cells, (F) 2.5Μm MNAC treated KYSE-150 cells. (G) Statistical results of oridonin induced ROS production in KYSE-150 cells, data was expressed as mean ± S.E.M. from three independent experiments, *p < 0.05, **p < 0.01.