Osteoprotegerin and receptor activator of nuclear factor kappaB ligand expression in fibroblast-like synoviocytes from rheumatoid arthritis and osteoarthritis patients |
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Authors: | Harashima S-i Tsukamoto H Horiuchi T |
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Institution: | Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka 812-8582, Japan |
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Abstract: | SIR, We read with interest the article by Haynes et al. 1]reporting the expression of osteoprotegerin (OPG) and receptoractivator of nuclear factor B ligand (RANKL) in synovial tissuesfrom patients with arthritis, including rheumatoid arthritis(RA). They showed that OPG was expressed predominantly in macrophagesin the synovial lining layer and in endothelial cells, and expressionwas decreased in patients with active RA compared with thosewith osteoarthritis (OA), inactive RA and spondyloarthropathies.In contrast, RANKL expression was seen in active RA synovialtissues, |
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