Anti‐inflammatory effects of continuous passive motion on meniscal fibrocartilage

Journal of Orthopaedic Research - Tập 23 - Trang 1165-1171 - 2005
Mario Ferretti1, Abiraman Srinivasan1, James Deschner1, Robert Gassner2, Frank Baliko3, Nicholas Piesco4, Robert Salter3, Sudha Agarwal1
1Department of Oral Biology, The Ohio State University, 4171 Postle Hall, 305 West 12th Street, Columbus, OH 43210, USA
2Department of Oral and Maxillofacial Surgery, University of Innsbruck, A-6020 Insbruck, Austria
3Department of Orthopaedic Surgery, Hospital for Sick Children, Toronto, Ontario MSG1X8, Canada
4Department of Oral Medicine and Pathology, University of Pittsburgh, Pittsburgh, PA 15261, USA

Tóm tắt

AbstractMotion‐based therapies have been applied to promote healing of arthritic joints. The goal of the current study was to determine the early molecular events that are responsible for the beneficial actions of motion‐based therapies on meniscal fibrocartilage. Rabbit knees with Antigen‐Induced‐Arthritis (AIA) were exposed to continuous passive motion (CPM) for 24 or 48 h and compared to immobilized knees. The menisci were harvested and glycosaminoglycans (GAG), interleukin‐1β (IL‐1β), matrix metalloproteinase‐1 (MMP‐1), cyclooxygenase‐2 (COX‐2), and interleukin‐10 (IL‐10) were determined by histochemical analysis.Within 24 h, immobilized knees exhibited marked GAG degradation. The expression of proinflammatory mediators MMP‐1, COX‐2, and IL‐1β was notably increased within 24 h and continued to increase during the next 24 h in immobilized knees. Knees subjected to CPM revealed a rapid and sustained decrease in GAG degradation and the expression of all proinflammatory mediators during the entire period of CPM treatment. More importantly, CPM induced synthesis of the anti‐inflammatory cytokine IL‐10. The results demonstrate that mechanical signals generated by CPM exert potent anti‐inflammatory signals on meniscal fibrochondrocytes. Furthermore, these studies explain the molecular basis of the beneficial effects of CPM observed on articular cartilage and suggest that CPM suppresses the inflammatory process of arthritis more efficiently than immobilization. © 2005 Orthopaedic Research Society. Published by Elsevier Ltd. All rights reserved.

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Journal of Orthopaedic Research

Tập 23

1165-1171

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