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Regulations of PMSCs and PMSCs-CM on IL-1β-treated chondrocytes. (A) Expressions of target proteins in rat chondrocytes treated with PMSCs. (B) Expressions of target proteins in rat chondrocytes treated with PMSCs-CM. Values were presented as mean ± SD. # p < 0.05 vs. NC group; ## p < 0.01 vs. NC group; *p < 0.05 and **p < 0.01 vs. Model group. All experiments were repeated at least three times.
