Research Article

Acacetin Suppresses IL-1β-Induced Expression of Matrix Metalloproteinases in Chondrocytes and Protects against Osteoarthritis in a Mouse Model by Inhibiting NF-κB Signaling Pathways

Figure 2

Cytotoxicity and MMP inhibitory effect of acacetin in human primary chondrocytes. (a) Chemical structural formula of acacetin. (b) Viability of chondrocytes treated with acacetin (0–200 μM) for 48 h. (c) Chondrocytes were treated with acacetin (H-acacetin, 6.25 μM; L-acacetin, 3.125 μM) and IL-1β (10 ng/mL) for 24 h. Immunofluorescence showed the expression of MMP-1, MMP-3 and MMP-13 in the cytoplasm of chondrocytes. , , and .
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