Figure 3

Fibrocytes in patients with mild asthma express collagen. Bronchial biopsies were stained using immunofluorescent antibodies against prolyl-4-hydroxylase (green) CD45RO (red) and nuclei (blue) (A). Squares indicate the same cluster area as shown in A. The merged picture describes the positive cells within the square. Cells were further stained for CD34 (green), procollagen I (red), and nuclei (blue) (B), and were subjected to confocal microscopy. The merged picture describes the positive cell within the square. Definition of abbreviations: BM = Basement membrane