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Influence of quercetin on thioredoxin (TRX) production from HNEpCs induced by H2O2 stimulation in vitro. Nasal epithelial cells (5 × 105 cells) were stimulated with 50 μM H2O2 in the presence of various concentrations of quercetin for 24 h. TRX levels in culture supernatants were examined with ELISA. The data are expressed as the mean pg/mL ± SE of triplicate cultures. One representative experiment of two is shown in this figure. Med. alone: Medium alone.
