Figure 1.
Influence of H2O2 on thioredoxin (TRX) production from HNEpCs in vitro. Nasal epithelial cells (5 × 105 cells) were stimulated with various concentrations of H2O2. After 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. *: P < 0.05 versus control (0); ** P > 0.05 versus 12.5 μM H2O2.