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. 2022 Aug 21;19(10):1502–1509. doi: 10.7150/ijms.73947

Figure 2.

Figure 2

Luteolin reduces aqueous extract PM2.5-enhanced pro-MMP-2 activity. H460 cells were pretreated with luteolin (0, 5, 10, or 20 µM) for 1 h and then stimulated with PM2.5 (50 µg/ml) for 48 h. Zymography assay showed pro-MMP-2 levels. Cells without PM2.5 stimulation and luteolin treatment were used as the control group (mock). Quantitative data are presented as the mean ± SEM of the experiments (n = 3). *P < 0.05, significant compared to the mock group; #P < 0.05, significant compared to the PM2.5-exposed cells without luteolin treatment.