Figure 7. Increased fibroblasts in small airway walls in rats induced by wood smoke exposure.

Immunostaining for FSP1 and spindle-shaped cells in small airway walls following smoke exposure for 7 months is shown in (A). (B) Graph showing that the number of fibroblasts increased significantly in small airway walls exposed to WS or CS for 4 to 7 months. Data are shown as the mean ± SEM. n = 8 animals/group. Scale bar  = 50 µm.