Experimental Study on Immunological Reactions against the Articular Cartilage

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Abstract
In rats immunized with articular cartilage antigens, delayed hypersensitivity was detected by the macrophage migration inhibition test and delayed footpad reaction. Additionally, a proliferative response was found in the regional lymph nodes of immunized rats. The mixed addition of sensitized lymphocytes and antibodies exerted a cytotoxic effect on cultured chondrocytes. Articular damage including accelerated chondrolysis may have some relation to delayed hypersensitivity to autologous articular cartilage antigens.