Fig. 5.

Inhibition of neutrophil influx in lungs of chlorine-exposed mice. Mice were exposed to inhaled chlorine and treated with triptolide 1 h after the end of the exposure. At 6 h after exposure, lungs were fixed for immunohistochemistry. Control groups were unexposed mice (Unexp) and chlorine-exposed mice treated with vehicle (Veh). Histological sections of lungs were stained with antibodies against the neutrophil marker Ly-6G, and stained cells in lung parenchyma were counted. Values are means ± SE for 5–7 mice per group. ^aP < 0.001 vs. Veh.