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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Remst, D. F. G. Blom, A. B. Vitters, E. L. Bank, R. A. Van Den Berg, W. B. Blaney Davidson, E. N. Van Der Kraan, P. M. |
| Description | Country affiliation: Netherlands Author Affiliation: Remst DF ( Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.) |
| Abstract | OBJECTIVE: Synovial fibrosis is a major contributor to joint stiffness in osteoarthritis (OA). Transforming growth factor ß (TGFß), which is elevated in OA, plays a key role in the onset and persistence of synovial fibrosis. However, blocking of TGFß in OA as a therapeutic intervention for fibrosis is not an option since TGFß is crucial for cartilage maintenance and repair. Therefore, we undertook the present study to seek targets downstream of TGFß for preventing OA-related fibrosis without interfering with joint homeostasis. METHODS: Experiments were performed to determine whether genes involved in extracellular matrix turnover were responsive to TGFß and were elevated in OA-related fibrosis. We analyzed gene expression in TGFß-stimulated human OA synovial fibroblasts and in the synovium of mice with TGFß-induced fibrosis, mice with experimental OA, and humans with end-stage OA. Gene expression was determined by microarray, low-density array, or quantitative polymerase chain reaction analysis. RESULTS: We observed an increase in expression of procollagen genes and genes encoding collagen crosslinking enzymes under all of the OA-related fibrotic conditions investigated. Comparison of gene expression in TGFß-stimulated human OA synovial fibroblasts, synovium from mice with experimental OA, and synovium from humans with end-stage OA revealed that the genes PLOD2, LOX, COL1A1, COL5A1, and TIMP1 were up-regulated in all of these conditions. Additionally, we confirmed that these genes were up-regulated by TGFß in vivo in mice with TGFß-induced synovial fibrosis. CONCLUSION: Most of the up-regulated genes identified in this study would be poor targets for therapy development, due to their crucial functions in the joint. However, the highly up-regulated gene PLOD2, responsible for the formation of collagen crosslinks that make collagen less susceptible to enzymatic degradation, is an attractive and promising target for interference in OA-related synovial fibrosis. |
| File Format | HTM / HTML |
| ISSN | 23265191 |
| Issue Number | 3 |
| Volume Number | 66 |
| e-ISSN | 23265205 |
| Journal | Arthritis & Rheumatology |
| Language | English |
| Publisher | Wiley |
| Publisher Date | 2014-03-01 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Rheumatology Arthritis, Experimental Genetics Fibrosis Gene Expression Osteoarthritis Synovial Membrane Metabolism Transforming Growth Factor Beta Animals Pathology Cartilage Collagen Humans Mice Up-regulation Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Immunology and Allergy Immunology Rheumatology |
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