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Effects of quercetin on TLR4 expression and NF-κB activation in LPS-stimulated HGFs. HGFs were pretreated with quercetin at different final concentration of 5 μM, 10 μM, and 20 μM for 1 h, respectively, followed by LPS stimulation (final concentration at 1 μg/mL) for 30 min. The values of three independent experiments are presented as means ± SD. #P<0.05 versus control group; ∗∗P<0.01 versus LPS group.
