Figure 3.

Effect of tryptase and elastase on the release of IL-8 from A549 cells. Cells were incubated with various concentrations of tryptase or elastase at 37°C for 16 h (A), or with 2 μg/ml tryptase or 0.3 μg/ml elastase for 2 h, 8 h and 16 h (B). Values shown are mean ± SE for 5 separate experiments. * P < 0.05 compared with the response to medium alone control.