Summary Reasons for performing study: Clinical trials in human and veterinary literature have documented the benefits of oral nutraceutical joint supplements containing glucosamine (GU) and chondroitin sulphate (CS) to treat mild to moderate osteoarthritis, but the effects of these components have not yet been conclusively determined. Objectives: To assess varying dosages of GU and CS on normal and interleukin‐1α (IL‐1) conditioned equine cartilage explants and rationalise the use of these products. Hypothesis: Treatment would not be detrimental to cartilage metabolism and higher dosages and the combination of GU and CS would be more beneficial than lower dosages and GU or CS alone. Methods: Articular cartilage explants collected from the femoral trochlea and condyles were cultured in normal and IL‐1 conditioned media. Treatment groups included 0, 12.5, 25, 125 and 250 μg/ml concentrations of GU alone, CS alone, or GU+CS in combination. Glycosaminoglycan (GAG) synthesis and total GAG content in the explants and media were analysed. Results: There were no detrimental effects of GU, CS or GU+CS on cartilage metabolism. High dosages of GU+CS reduced total GAG release into the media (degradation). Conclusions: Our results suggests that GU+CS may prevent cartilage GAG degradation. Potential relevance: The combination of GU and CS may be more effective in preventing or treating osteoarthritis in horses than either product alone.
Equine Veterinary Journal – Wiley
Published: May 1, 2005
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