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A549 cells were treated with scutellarin (SCU) (0, 200, 400, 600 μM) for 24 hours. Western blotting analyses were used to detect the expression of proteins in the STAT3 pathways, cyclin D1, and cyclin E (a). Data are expressed as means ± standard deviation from three independent experiments. * P < 0.05, ** P < 0.01 vs. the control group (b, c, d, e, f).
