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Expression of the TNF-α, IL-1β and ADAMTS-4 proteins in rat knee joints cartilage. a. Protein expression of TNF-α, IL-1β and ADAMTS-4 in the cartilage of the knee joints of the rats in each group determined via immunohistochemistry. b. Optical density values of TNF-α, IL-1β, and ADAMTS-4 in each group. c. Areas positive for TNF-α, IL-1β and ADAMTS-4 in each group. N = 10, compared with Group A, “#”P < 0.05 and “##”P < 0.01, compared with Group B, “*”P < 0.05 and “**”P < 0.01
