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Proteomic Analysis of Tendon Extracellular Matrix Reveals Disease Stage- specific Fragmentation and Differential Cleavage of COMP ( Cartilage Oligomeric Matrix Protein)

Dakin, S G; Smith, R K W; Heinegard, D; Onnerfjord, P; Khabut, A; Dudhia, J

Authors

S G Dakin

R K W Smith

D Heinegard

P Onnerfjord

A Khabut

J Dudhia



Abstract

During inflammatory processes the extracellular matrix (ECM) is extensively remodeled, and many of the constituent components are released as proteolytically cleaved fragments. These degradative processes are better documented for inflammatory joint diseases than tendinopathy even though the pathogenesis has many similarities. The aims of this study were to investigate the proteomic composition of injured tendons during early and late disease stages to identify disease-specific cleavage patterns of the ECM protein cartilage oligomeric matrix protein (COMP). In addition to characterizing fragments released in naturally occurring disease, we hypothesized that stimulation of tendon explants with proinflammatory mediators in vitro would induce fragments of COMP analogous to natural disease. Therefore, normal tendon explants were stimulated with IL-1β and prostaglandin E2, and their effects on the release of COMP and its cleavage patterns were characterized. Analyses of injured tendons identified an altered proteomic composition of the ECM at all stages post injury, showing protein fragments that were specific to disease stage. IL-1β enhanced the proteolytic cleavage and release of COMP from tendon explants, whereas PGE2 had no catabolic effect. Of the cleavage fragments identified in early stage tendon disease, two fragments were generated by an IL-1-mediated mechanism. These fragments provide a platform for the development of neo-epitope assays specific to injury stage for tendon disease.

Citation

Dakin, S. G., Smith, R. K. W., Heinegard, D., Onnerfjord, P., Khabut, A., & Dudhia, J. (2014). Proteomic Analysis of Tendon Extracellular Matrix Reveals Disease Stage- specific Fragmentation and Differential Cleavage of COMP ( Cartilage Oligomeric Matrix Protein). Journal of Biological Chemistry, 289(8), 4919-4927. https://doi.org/10.1074/jbc.M113.511972

Journal Article Type Article
Acceptance Date Dec 11, 2013
Publication Date Feb 21, 2014
Deposit Date Nov 12, 2014
Publicly Available Date Mar 29, 2024
Journal JOURNAL OF BIOLOGICAL CHEMISTRY
Print ISSN 0021-9258
Publisher American Society for Biochemistry and Molecular Biology
Peer Reviewed Peer Reviewed
Volume 289
Issue 8
Pages 4919-4927
DOI https://doi.org/10.1074/jbc.M113.511972
Public URL https://rvc-repository.worktribe.com/output/1405965
Additional Information Corporate Creators : Lund, Sweden

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