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- W2016273359 abstract "1 As nonsteroidal antiinflammatory drugs may impair the ability of the chondrocyte to repair its damaged extracellular matrix, we explored the changes in the metabolism of newly synthesized proteoglycan (PG) and hyaluronan (HA) molecules produced by tenoxicam and aspirin in human normal cartilage explants and in osteoarthritic (OA) cartilage from age-matched donors. 2 Explants were sampled from the medial femoral condyle and were classified by use of Mankin's histological-histochemical grading system. Cartilage specimens were normal in 10 subjects, exhibited moderate OA (MOA) in 10 and had severe OA (SOA) in 10. 3 Cartilage explants were pulsed with [3H]-glucosamine and chased in the absence and in the presence of either aspirin (190 μg ml1) or tenoxicam (4–16 μg ml−1). After papain digestion, the labelled chondroitin sulphate ([3H]-PGs) and HA([3H]-HA) molecules present in the tissue and media were purified by anion-exchange chromatography. 4 In normal cartilage as well as in explants with MOA and SOA aspirin reduced more strongly PG and HA synthesis than the loss of [3H]-HA and [3H]-PGs. 5 In normal cartilage, tenoxicam did not affect PG metabolism whereas it reduced HA synthesis in a dose-dependent manner and did not change or even increased the net loss of [3H]-HA. In contrast, in OA cartilage, tenoxicam produced a stronger reduction in the loss of [3H]-PGs than in PG synthesis and this decrease occurred at lower concentrations in cartilage with SOA (4–8 μg ml−1) than in cartilage with MOA (8–16 μg ml−1). In cartilage with MOA, the metabolic balance of HA was unaffected by tenoxicam whereas in cartilage with SOA, the drug decreased the loss of [3H]-HA and concomitantly did not change or even increased HA synthesis. 6 The data obtained in short-term in vitro cultures indicate that aspirin may produce OA-like changes in normal cartilage and is likely to worsen the disease process in OA tissue. On the other hand, although tenoxicam may reduce the HA content of normal cartilage, and, in so doing, may produce OA-like lesions, this drug should not per se accelerate joint failure in OA." @default.
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- W2016273359 date "1994-12-01" @default.
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- W2016273359 title "Effects of tenoxicam and aspirin on the metabolism of proteoglycans and hyaluronan in normal and osteoarthritic human articular cartilage" @default.
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- W2016273359 doi "https://doi.org/10.1111/j.1476-5381.1994.tb17111.x" @default.
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