Research Article

Exosomes from Kartogenin-Pretreated Infrapatellar Fat Pad Mesenchymal Stem Cells Enhance Chondrocyte Anabolism and Articular Cartilage Regeneration

Figure 2

Isolation and identification of exosomes. (a) TEM results. The red arrow indicates exosomes. (b) Identification of exosome surface proteins. Western blotting showed that these exosomes were positive for the exosome-specific surface proteins CD9 and TSG101. (c) NTA test results. The size of the particles within the precipitate were predominantly 40–100 nm in diameter. Red line: range of particle concentration at different diameter sizes; black line: average concentration of particles at different diameter sizes.
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