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Effects of POL, ACT, and FTB on A549 cells. (A–C) Effects of treatment with POL, ACT, FTB (1, 10, 20, 40, 80, and 160 μM) for 24 and 48 h on the viability of A549 cells. (D) Cell viability was measured by stimulating with TNF-α (10 ng/ml) for 24 h, and then treated with POL, ACT, and FTB (10, 20, and 40 μM) for 24 h. Values represent the means ± SD (n = 6). ## p < 0.01 vs control; * p < 0.05, **p < 0.01 vs TNF-α.
