Fig. 3.

bFGF is expressed by peribronchial mononuclear cells and airway epithelium. Lung sections from mice that received no OVA (a), chronic OVA (b) or chronic OVA + corticosteroids (CS) (c) were processed for immunostaining with an anti-bFGF Ab. The arrow in b indicates a mononuclear cell positive for bFGF. Mice chronically challenged with OVA had peribronchial cells expressing bFGF (red immunofluorescence; d) as well as F4/80 (green immunofluorescence; e). Peribronchial cells expressing both bFGF and F4/80 demonstrated yellow immunofluorescence (f).