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Effect of the RRL on GSH-Px, SOD, and MDA activity in CS and LPS-induced COPD in rats (n = 6, X ± S). (a) The activity of SOD in lung tissue. (b) The content of MDA in lung tissue. (c) The activity of GSH-Px in lung tissue. Values are expressed as the mean ± SD; ##P < 0.01 vs. the control group; ∗P < 0.05 and ∗∗P < 0.01 vs. the model group.
