Summary
The pathophysiology of rheumatoid arthritis (RA) is complex and still not fully understood. Currently the main hypothesis is that chronic inflammation occurs after stimulation by T cell-macrophage interaction, induced by unknown antigen(s). This is accompanied by a complex sequence of highly integrated actions between macrophages, synoviocytes, polymorphonuclear cells and endothelial cells. The chronic inflammation is a major cause of pain and functional impairment, ultimately resulting in joint destruction. The production of eicosanoids (prostaglandins and leukotrienes) by macrophages/synoviocytes is only one of the many pathways of the inflammatory reaction, but the well-established efficacy of NSAIDs in patients with RA underscores the importance of the pro-inflammatory cyclo-oxygenase-pathway products in the pathophysiology of the symptoms. A positive clinical effect of n-3 fatty acids has been shown in some but not all animal experiments of arthritis. In patients with RA, n-3 fatty acid supplementation decreased clinical symptoms. Differences from patients treated with placebo (but still on NSAIDs or disease modifying drugs) were significant in some studies. A significant difference from placebo in the tender joint score and morning stiffness was found in a meta-and mega-analysis of 10 studies. In long-term studies, treatment with n-3 fatty acids resulted in a substantial decrease of the use of NSAIDs and/or disease modifying drugs as compared to placebo. No effects have been documented on the progression of joint destruction. No major side effects were reported compared to placebo. Therefore, as part of the total treatment program of RA, patients should be advised about the potential moderate effects on their symptoms of diet supplements with n-3 fatty acids.
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Geusens, P.P. (1998). n-3 Fatty acids in the treatment of rheumatoid arthritis. In: Kremer, J.M. (eds) Medicinal Fatty Acids in Inflammation. Progress in Inflammation Research. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-8825-7_9
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DOI: https://doi.org/10.1007/978-3-0348-8825-7_9
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