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Effects of quercetin on inducible nitric oxide synthase (iNOS) (A), TNF-α (B) and IL-6 (C) mRNA expression in RAP-induced RAW264.7 macrophages. RAW264.7 cells were treated with quercetin (10, 20 μM) and then treated with RAP (100 μg/mL). The mRNA expression level was quantified with real time fluorescence PCR. Data from the experiments are expressed as mean ± SD (## p < 0.01 compared with control group; * p < 0.05, ** p < 0.01 compared with RAP group).
