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Effects of quercetin on nitric oxide (NO) (A), TNF-α (B) and IL-6 (C) production in RAP- and LPS-induced RAW264.7 macrophages. RAW264.7 cells were incubated with quercetin (10, 20 μM) and then treated with RAP (100 μg/mL) or LPS (100 ng/mL) for 24 h. Data from the experiments are expressed as mean ± SD (## p < 0.01 compared with control group; * p < 0.05, ** p < 0.01 compared with the RAP or LPS group).
