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  • Title: Inhibition of proteoglycan biosynthesis by hyaluronic acid in chondrocytes in cell culture.
    Author: Handley CJ, Lowther DA.
    Journal: Biochim Biophys Acta; 1976 Aug 24; 444(1):69-74. PubMed ID: 133729.
    Abstract:
    The depression of proteoglycan synthesis in ten-day-old high density chondrocyte cultures was shown to be dependent on both the concentration and time of exposure of the cells to hyaluronic acid. Hyaluronic acid had no effect on the overall protein synthesis by the cultured cells. Using benzyl-beta-D-xyloside an exogenous acceptor, it was shown that glycosaminoglycan biosynthesis by the chondrocytes was not affected by hyaluronic acid. It was concluded that hyaluronic acid was effecting glycosaminoglycan chain initiation, hence proteoglycan biosynthesis, either by specifically depressing the synthesis of the core protein or by repressing the activity of the xylosyltransferase.
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