Fig. 6.
(A) Section in the lung of a control rat showing negative staining in the alveoli (a), alveolar sacs (S) and alveolar septa (I) (Prussian blue, ×400). (B) Section in the lung of a rat in IVI stem cell therapy group showing multiple Prussian blue positive cells (arrows) inside and around blood vessels (v), in the alveolar septa (I) and among the epithelial lining of a bronchiole (b) (Prussian blue, ×400). (C) Section in the lung of a rat in IPI stem cell therapy group showing some Prussian blue positive cells (arrows) inside blood vessels (v), in the alveolar septa (I) and in the adventitia of a bronchiole (b) (Prussian blue, ×400).