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hBMSC-EXOs promote cartilage repair in rabbits. (a) Saf-O/Fast Green staining. Scale bar = 1000 μm. (b) The International Cartilage Repair Society (ICRS) scores. n = 3. Values are presented as mean ± SEM. ∗P < 0.05, ∗∗P < 0.01, and ∗∗∗P < 0.001, one-way ANOVA. EXOs-low: 1 × 1010/ml; EXOs-high: 5 × 1010/ml.
