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The effect of RRL on TGF-β1, NFκB p65, IκBα, and Nrf2 levels in CS and LPS-induced COPD in rats. a, control group; b, model group; c, RRL 200 mg/kg; d, RRL 400 mg/kg; e, RRL 800 mg/kg; f, Dex 1 mg/kg. Values are expressed as the mean ± SD (n = 3); ##P < 0.01 vs. the control group; ∗P < 0.05 and ∗∗P < 0.01 vs. the model group.
