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Articular chondrocytes cell death mediated by normal human serum (NHS) at 12 h (A); and 24 h (B), respectively. The LMWCS-S-O group at 400 μg/mL did not show a significant difference from the control group at 12 h. The cell viabilities of all the other groups were significantly lower compared to the control group. All groups showed a protective effect compared to the model group (* p < 0.05 vs. the control group, # p < 0.05 vs. the model group).
