Figure 1
From: Myofibroblast expression in airways and alveoli is affected by smoking and COPD
The immunohistochemical characterization of widened alveolar tips. Image 1A represents alveolar walls and α-SMA positive widened alveolar tips (arrow) from normal peripheral lung tissue in a low power field. Images 1B-H show high power fields of a widened tip of a single alveolar septae, which is occupied by α-SMA positive cells (1B, arrow), Tn-C (1C, arrow), EDA-Fn (1D, arrow), vimentin (1E, arrow) and desmin (1F, arrow). Image 1G illustrates the typical expression of cytokeratin within the edge of a widened alveolar tip (arrow). 1H shows a CD31 positive small vessel (arrow) within the widened ending of alveolar septae. Scale bar is shown.