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. 2021 Nov 17;26(22):6949. doi: 10.3390/molecules26226949

Figure 2.

Figure 2

Quercetin prevents LPS−induced oxidative stress in lung epithelial cells. A549 cells were pretreated with quercetin (10 μM) for 4 h and then stimulated with LPS (10 μg/mL) for an additional 6 h. Production of intracellular ROS was determined by DCF-DA staining using confocal microscopy (A) and flow cytometry (B). Scale bar = 10 μm. ** p < 0.001 in comparison with non-treated cells. ### p < 0.001 compared with LPS-treated cells. Similar results were obtained in three independent experiments.