Fig. 3
From: Ozone augments interleukin-8 production induced by ambient particulate matter
Effect of N-acetyl-L-cysteine (NAC) on the increase in interleukin (IL)-8 production by collected PM dissolved in solution (1 μg/mL) without bubbling through ozone (a) and with bubbling through 0.12 ppm ozone (b) and 0.24 ppm ozone (c). The antioxidant NAC significantly inhibited the production of IL-8 induced by all collected PM dissolved in solution in a dose-dependent manner. Bars represent means ± SD. * P < 0.01