Microvesicles derived from mesenchymal stem cells inhibit acute respiratory distress syndrome-related pulmonary fibrosis in mouse partly through hepatocyte growth factor

Figure 1 Detection of mesenchymal stromal cell-derived microvesicle markers by flow cytometry and transmission and scanning electron microscopy. A: The expression of surface molecules (CD29, CD44, α5 integrins and the HLA-I antigen) was positive, whereas the expression of CD34 and CD73 was negative; B: Transmission and scanning electron microscopy were performed on purified mesenchymal stromal cell-derived microvesicles to reveal their spheroid morphologies and confirm their sizes.