Figure 3From: Effects of Coptis extract combined with chemotherapeutic agents on ROS production, multidrug resistance, and cell growth in A549 human lung cancer cellsCells were treated with COP-L (1.6 μg/mL), COP-H (6.4 μg/mL), BER-L (0.5 μg/mL), or BER-H (4 μg/mL) for 24 h and harvested for ROS determination. * P < 0.05 compared to control. Values are means ± SD of 4 independent assays.Back to article page