{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,17]],"date-time":"2025-12-17T08:40:19Z","timestamp":1765960819424,"version":"build-2065373602"},"reference-count":50,"publisher":"Wiley","issue":"10","license":[{"start":{"date-parts":[[2014,9,26]],"date-time":"2014-09-26T00:00:00Z","timestamp":1411689600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100000024","name":"CIHR","doi-asserted-by":"crossref","award":["86574"],"award-info":[{"award-number":["86574"]}],"id":[{"id":"10.13039\/501100000024","id-type":"DOI","asserted-by":"crossref"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Arthritis &amp; Rheumatology"],"published-print":{"date-parts":[[2014,10]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>Mitogen\u2010inducible gene 6 (MIG\u20106) regulates epidermal growth factor receptor (EGFR) signaling in synovial joint tissues. Whole\u2010body knockout of the <jats:italic>Mig6<\/jats:italic> gene in mice has been shown to induce osteoarthritis and joint degeneration. To evaluate the role of chondrocytes in this process, <jats:italic>Mig6<\/jats:italic> was conditionally deleted from <jats:italic>Col2a1<\/jats:italic>\u2010expressing cell types in the cartilage of mice.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Bone and cartilage in the synovial joints of cartilage\u2010specific <jats:italic>Mig6<\/jats:italic>\u2010deleted (knockout [KO]) mice and control littermates were compared. Histologic staining and immunohistochemical analyses were used to evaluate joint pathology as well as the expression of key extracellular matrix and regulatory proteins. Calcified tissue in synovial joints was assessed by micro\u2013computed tomography (micro\u2010CT) and whole\u2010skeleton staining.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Formation of long bones was found to be normal in KO animals. Cartilage thickness and proteoglycan staining of articular cartilage in the knee joints of 12\u2010week\u2010old KO mice were increased as compared to controls, with higher cellularity throughout the tissue. Radiopaque chondro\u2010osseous nodules appeared in the knees of KO animals by 12 weeks of age and progressed to calcified bone\u2013like tissue by 36 weeks of age. Nodules were also observed in the spine of 36\u2010week\u2010old animals. Erosion of bone at ligament entheses was evident by 12 weeks of age, by both histologic and micro\u2010CT assessment.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>MIG\u20106 expression in chondrocytes is important for the maintenance of cartilage and joint homeostasis. Dysregulation of EGFR signaling in chondrocytes results in anabolic activity in cartilage, but erosion of ligament entheses and the formation of ectopic chondro\u2010osseous nodules severely disturb joint physiology.<\/jats:p><\/jats:sec>","DOI":"10.1002\/art.38758","type":"journal-article","created":{"date-parts":[[2014,6,25]],"date-time":"2014-06-25T11:20:07Z","timestamp":1403695207000},"page":"2816-2827","source":"Crossref","is-referenced-by-count":47,"title":["Disturbed Cartilage and Joint Homeostasis Resulting From a Loss of Mitogen\u2010Inducible Gene 6 in a Mouse Model of Joint Dysfunction"],"prefix":"10.1002","volume":"66","author":[{"given":"Michael A.","family":"Pest","sequence":"first","affiliation":[{"name":"Western University London, Ontario Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bailey A.","family":"Russell","sequence":"additional","affiliation":[{"name":"Western University London, Ontario 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