Figure 3.

Cellular radical scavenging activity in tBuOOH-activated RAW264.7 cells. Intracellular ROS level generated in cells was measured by the DCFH-DA. RAW264.7 cells were pretreated with indicated concentrations of antioxidants (a), EEP (b) or WEP (c), for 24 h prior to take-up of 20 μM DCFH-DA for 30 min. Results are mean ± SEM (n = 4) and are representative of three independent experiments with similar results. Points marked with different letters are significantly different at P < 0.05 when compared at the same time point as determined by two-way ANOVA.