Correlation of the total superoxide dismutase activity between joint fluid and synovium in end-stage knee osteoarthritis

Author:

Koike Masato,Nojiri Hidetoshi,Kanazawa Hiroaki,Sawa Mamiko,Miyagawa Kei,Yamaguchi Hiroto,Iwase Yoshiyuki,Kurosawa Hisashi,Kaneko Kazuo,Ishijima Muneaki

Abstract

AbstractRecently, we found significantly reduced total superoxide dismutase (SOD) activity in the cartilage of patients with end-stage knee osteoarthritis (OA). In this study, we aimed to evaluate the SOD activity in serum, joint fluid, cartilage, and synovial membrane samples collected from 52 patients with end-stage knee OA who underwent total knee arthroplasty. The relationship between the total SOD activity in each tissue was evaluated using Spearman’s rank correlation coefficient. The joint fluid total SOD activity was used as the objective variable, and its association with the serum, cartilage, and synovial total SOD activities was evaluated using multiple linear regression analysis. Univariate analysis revealed that joint fluid total SOD activity was positively correlated with synovial total SOD activity. Multiple linear regression analysis using joint fluid total SOD activity as the objective variable showed a positive association with synovial total SOD activity (β = 0.493, adjusted R2 = 0.172, P < 0.01). In patients with end-stage knee OA, the state of the synovial total SOD activity is better reflected by the total SOD activity in the joint fluid than that in the cartilage. Joint fluid total SOD activity may serve as a biomarker for the treatment and prevention of synovitis.

Funder

JSPS KAKENHI

Publisher

Springer Science and Business Media LLC

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