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AG@MSNs-PAA prevents IL-1β-induced inflammation in chondrocytes in vitro. (a, b) Relative mRNA levels of OA relative genes (Mmp3 and Mmp13). (c) MMP13 expression was analyzed by immunofluorescence staining (scale bar: 100 µm). Data were presented as the mean ± SD (n = 3). #P < 0.05; **, ##P < 0.01; ***, ###P < 0.001.
