Figure 6. Number of positive cells for glycosylated 91-kDa glycoprotein (gp91phox ) in the four experimental groups, expressed as mean ± SE. The number of gp91phox -positive cells in the peribronchial region was higher in the CS group than in the control and PPE groups (in A; *p = 0.001). In the distal lung parenchyma, the number of gp91phox -positive cells was higher in the CS group than in the control group (in B; *p = 0.03), as well as being higher in the CS + PPE group than in the control and PPE groups (in B; **p < 0.003). PPE: porcine pancreatic elastase; and CS: cigarette smoke.