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Targeted mutation of NOV/CCN3 in mice disrupts joint homeostasis and causes osteoarthritis-like disease

Roddy, K. A. and Boulter, Catherine 2015. Targeted mutation of NOV/CCN3 in mice disrupts joint homeostasis and causes osteoarthritis-like disease. Osteoarthritis and Cartilage 23 (4) , pp. 607-615. 10.1016/j.joca.2014.12.012

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Objective The matricellular protein NOV/CCN3, is implicated in osteoarthritis (OA) and targeted mutation of NOV in mice (Novdel3) leads to joint abnormalities. This investigation tested whether NOV is required for joint homeostasis and if its disruption causes joint degeneration. Method NOV expression in the adult mouse joint was characterized by immunohistochemistry. A detailed comparison of the joints of Novdel3−/− and Novdel3+/+ (wild-type) males and females at 2, 6 and 12 months of age was determined by X-ray, histology and immunohistochemistry. Results NOV protein was found in specific cells in articular cartilage, meniscus, synovium and ligament attachment sites in adult knees. Novdel3−/− males exhibited severe OA-like pathology at 12 months (OARSI score 5.0 ± 0.5, P < 0.001), affecting all tissues of the joint: erosion of the articular cartilage, meniscal enlargement, osteophytic outgrowths, ligament degeneration and expansion of fibrocartilage. Subchondral sclerosis and changes in extracellular matrix composition consistent with OA, were also seen. The density of articular cartilage cells in Novdel3+/+ knee joints is maintained at a constant level from 2 to 12 months of age whereas this is not the case in Novdel3−/− mice. Compared with age and sex-matched Novdel3+/+ mice, a significant increase in articular cartilage density was seen in Novdel3−/− males at 2 months, whereas a significant decrease was seen at 6 and 12 months in both Novdel3−/− males and females. Conclusion NOV is required for the maintenance of articular cartilage and for joint homeostasis, with disruption of NOV in ageing Novdel3−/− male mice causing OA-like disease.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Subjects: Q Science > QR Microbiology
Uncontrolled Keywords: NOV/CCN3; Joint homeostasis; Osteoarthritis; Targeted mouse mutant
Publisher: Elsevier
ISSN: 1063-4584
Funders: Arthritis Research UK
Date of First Compliant Deposit: 30 March 2016
Date of Acceptance: 14 December 2014
Last Modified: 08 Mar 2019 14:09

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