Fig. 3From: Extracellular vesicles derived from umbilical cord mesenchymal stromal cells alleviate pulmonary fibrosis by means of transforming growth factor-β signaling inhibitionuMSC-EVs enhanced the proliferation of alveolar epithelial cells in BLM-induced pulmonary fibrosis. Expression levels of Ki67 (proliferating cell) and EpCAM (epithelial cell) were detected using IF staining. Scale bar = 200 μmBack to article page