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  • Title: Expression of cartilage-related genes in bovine synovial tissue.
    Author: Shintani N, Kurth T, Hunziker EB.
    Journal: J Orthop Res; 2007 Jun; 25(6):813-9. PubMed ID: 17358035.
    Abstract:
    The synovium contains mesenchymal stem cells with chondrogenic potential. Although synovial and articular cartilage tissue develop from a common pool of mesenchymal cells, little is known about their genetic commonalities. In the present study, the mRNA levels for several cartilage-related proteins, namely, cartilage oligomeric matrix protein (COMP), Sox9, aggrecan, and collagen types I, II, IX, X, and XI, were measured using the real-time polymerase chain reaction. Our data reveal the synovium of calf metacarpal joints to physiologically express not only type I collagen but also COMP, Sox9, aggrecan, and collagen types X and XI. The mRNA levels for the latter five proteins lie between 2% and 15% of those in articular cartilage. We speculate that these genes are being expressed by chondroprogenitor cells, whose presence in the synovium reflects a common ontogenetic phase in the fetal development of this tissue and of articular cartilage.
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