Effects of anti-inflammatory drugs on cartilage recovery from catabolin-induced degradation
Tóm tắt
Effects of aspirin (200 μg/ml), hydrocortisone (10 μg/ml), sodium aurothiomalate (100 μg/ml), and indomethacin (10 μg/ml) on recovery of cartilage from interleukin 1 or catabolin-induced degradation were examined in this initialin vitro study. The experimental protocol involved a “degradative phase” of eight days during which cartilage plugs were incubated in the presence or absence of spent human rheumatoid synovial culture media. A “recovery” period of six days followed during which the effects of the aforementioned drugs on treated cartilage were analyzed. Incorporation of [35S]sulfate and [3H]proline precursors, and total contents of hydroxyproline and glycosaminoglycan in cartilage were determined two, four, and six days after insult. Aspirin treatment caused a rise in total proteoglycan content over degraded controls (p<0.002), however, this increase was not associated with increased [35S]sulfate incorporation into glycosaminoglycans. Hydrocortisone resulted in a delayed rise in proteoglycan content concommitant with increased [35S]sulfate uptake, whereas sodium aurothiomalate treatment was without effect on proteoglycans. Indomethacin treatment was associated with an increased release of newly synthesized macromolecules by cartilage into the media (p<0.01). These results suggest that common anti-inflammatory drugs may exhibit distinctly different effects on thein vitro synthesis and retention of proteoglycans by cartilage explants previously exposed to a degradative phase. Further work is necessary to assess the influence of drug concentration in this experimental system.
Tài liệu tham khảo
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