Photomicrographs representing NF-κB (P65) immune stained lung sections of adult male mice exhibiting: (A) in group I (control): weak positive brown nuclear immunoreaction for NF-κB in a very low number of cells, (B) in group II (diseased): very strong positive NF-κB (P65) nuclear immunoreaction for in a large number of cells (arrows), (C) in group III (diseased, 50 mg/kg FEE): moderate positive NF-κB (P65) nuclear immunoreaction in certain cells (arrows), (D) in group IV (diseased, 100 mg/kg FEE): moderate positive NF-κB (P65) nuclear immunoreaction in a low number of cells (arrows), (E) in group V (diseased, 150 mg/kg FEE): weak positive nuclear NF-κB (P65) immunoreaction in a very low number of cells (arrows) and (F) in group VI (150 mg/kg only): weak positive nuclear NF-κB (P65) immunoreaction in a low number of cells (arrows). [NF-κB immunostaining×400, scale bar = 50 μm].