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RSF increased ROS levels in 5637 cells. (A) Cells were stained with DCF-DA and then, intracellular ROS levels were measured. (B) Intracellular ROS levels were assessed after treating cells with RSF. ROS levels are expressed as percentages of untreated controls. Results are presented as means ± SEMs. **p<0.001. RSF, ethanolic extract of Radix Sophorae Flavescentis; CTRL, control.
