Figure 6

Representative pictures (400x) of M1 AMs dual stained for iNOS (brown) and CD68 (blue); (a) Normal control, and (b) COPD-CS, counterstained with nuclear fast red (pink). M2 phenotype macrophages stained brown with CD163 and arginase-1(ARG-1), (c,e) Normal controls and (d,f) COPD-CS respectively, with nuclear-stained hematoxylin (blue).