Indirect immunofluorescent staining of control and DEX + IL-6 stimulated A549 cells. Untreated (A and B) and treated (C and D) lung epithelial cells were stained with purified anti-FBG IgG (A and C) or anti-FBG IgG pre-adsorbed with excess purified FBG (B and D). Asterisks denote positive staining in a spidery network pattern and arrowheads denote positive staining in discrete patches.43 The bar = 10 μm.