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- W2000853371 abstract "We studied the effects of dexamethasone on proteoglycan (PG) concentration and gene expression in human osteoarthrotic chondrocytes stimulated with IL-1beta. Cartilage samples were taken from 7 patients with osteoarthrosis of the knee and chondrocytes cultivated in alginate beads. Dexamethasone was added in three concentrations (10(-5), 10(-6), 10(-7) M) to IL-1beta (100 pg/nL)-stimulated chondrocytes. PG concentration was estimated by a dimethylmethylene blue assay. To assess cell proliferation, DNA content was measured fluorometrically. Quantitative Lightcycler-PCR was used to estimate the mRNA levels of stromelysin-1 (MMP-3) and aggrecan (AGG). The proliferation rate was unchanged in all treatment groups. IL-1beta increased MMP-3 expression by 44% and inhibited AGG expression by 16%, but PG-concentration was reduced by 7%. The addition of dexamethasone to IL-1beta-stimulated chondrocytes further reduced the PG concentration by 19% at 10(-5) M and by 17% at 10(-7) M. The MMP-3 expression was inhibited between 27-53% and the AGG expression between 30-46% by dexamethasone. In osteoarthrotic chondrocytes, dexamethasone in an appropriate dose range reduced the expression of MMP-3 and AGG at the same time. The resulting decrease in PG concentration should be considered when using intraarticular corticosteroids to treat an osteoarthrotic joint." @default.
- W2000853371 created "2016-06-24" @default.
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- W2000853371 date "2002-01-01" @default.
- W2000853371 modified "2023-09-26" @default.
- W2000853371 title "Effects of dexamethasone on proteoglycan content and gene expression of IL-1ß-stimulated osteoarthrotic chondrocytes in vitro" @default.
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- W2000853371 doi "https://doi.org/10.1080/000164702321022857" @default.
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