P < 0.05 indicated a significant difference, and P < 0.01 indicated an extremely significant difference. 3 Results 3.1 Identification of PUMSLCs and PUMSLC-sEVs The isolated PUMSLCs were long, spindle-shaped adherent cells, showing a typical mesenchymal stem cell morphology ( Fig. 1 A).
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CD73-positive pediatric urethral mesenchymal stem-like cell-derived small extracellular vesicles stimulate angiogenesis.
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