VEGFA and rheumatoid arthritis: Therefore, Chen and colleagues, investigated the mesenchymal stem cell (MSC) derived miR‐150‐5p loaded exosome (Exo‐150) in RA to assess the MMP‐14, fibroblast‐like synoviocytes (FLS), and vascular endothelial growth factor (VEGF) in RA patients via ELISA, and western blot analysis.