Human Umbilical Cord Mesenchymal Stem Cell-Derived Exosomes Promote Microcirculation in Aged Diabetic Mice by TGF-β1 Signaling Pathway

Human mesenchymal stem cell-derived exosomes were extracted by hypervelocity centrifugation method, and exosome morphology was observed by transmission electron microscopy, exosome diameter distribution was detected by particle size analysis, and exosome specific proteins were identified by Western blot.2.