Changes in synovial fluid biochemical markers following arthroscopic surgery in patients with knee osteoarthritis
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Although arthroscopic surgery (AS) for knee osteoarthritis has been widely employed, scientific evidence is lacking. The purpose of this study was to investigate temporal changes in synovial fluid levels of biochemical markers associated with cartilage metabolism following AS. Twenty-five knees of 24 patients with medial knee osteoarthritis (mean age 70.5 years) were included in this study. Synovial fluids were sampled immediately before surgery and 2, 4, 8, and 12 weeks after AS. Levels of the biochemical markers chondroitin 6-sulfate (C6S), chondroitin 4-sulfate (C4S), and keratan sulfate (KS) were measured and correlations among the biochemical markers were analyzed before and after surgery. C6S, C4S, and total CS levels were the same before and after surgery; however, the KS level decreased significantly at 2 weeks after AS. A strong, positive correlation was detected between C6S and KS levels at 12 weeks, differing from the weaker correlation seen before surgery. Seven of the patients required total or unicompartmental knee arthroplasties in the 2 years following AS. In this study, the significant reduction in KS levels and the strong correlation between C6S and KS levels were shown, which indicates suppressed cartilage turnover after AS. Exploring predictive factors indicating favorable or unfavorable outcomes from AS will be important future studies.
KeywordsArthroscopic surgery Biomarker Cartilage metabolism Knee osteoarthritis Synovial fluid
We thank Seikagaku Kogyo Co. for measurements of CS and KS synovial fluid levels.
Conflict of interest
The authors have no conflict of interest.
- 8.Manicourt DH, Poilvache P, Nzeusseu A, van Egeren A, Devogelaer JP, Lenz ME et al (1999) Serum levels of hyaluronan, antigenic keratan sulfate, matrix metalloproteinase 3, and tissue inhibitor of metalloproteinases 1 change predictably in rheumatoid arthritis patients who have begun activity after a night of bed rest. Arthritis Rheum 42:1861–1869PubMedCrossRefGoogle Scholar
- 19.Kobayashi K, Matsuzaka S, Yoshida Y, Miyauchi S, Wada Y, Moriya H (2004) The effects of intra-articularly injected sodium hyaluronate on levels of intact aggrecan and nitric oxide in the joint fluid of patients with knee osteoarthritis. Osteoarthritis Cartilage 12:536–542PubMedCrossRefGoogle Scholar