Fig. 2

HUMSC-Exos promoted expression of tendon markers. A Representative cellular immunofluorescence images of COL1A1, COL3A1, DCN, TNMD (red), and the nuclei stained with DAPI (blue), scale bar: 50 μm. B–E Quantification of cellular immunofluorescence (n = 6 per group). *P < 0.05 vs. control. ^#P < 0.05 vs. Sup group. F Representative western blot images of COL1A1, COL3A1, MKX, SCXA, DCN, and TNMD. G, H. Sirius Red staining for collagen deposition (n = 6 per group). ***P < 0.001 vs. control group. ^###P < 0.001 vs. Sup group