{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,3]],"date-time":"2026-07-03T21:35:38Z","timestamp":1783114538639,"version":"3.54.6"},"reference-count":37,"publisher":"Portland Press Ltd.","issue":"11","license":[{"start":{"date-parts":[[2019,9,27]],"date-time":"2019-09-27T00:00:00Z","timestamp":1569542400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["portlandpress.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2019,11,29]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Heterotopic ossification (HO), the pathologic formation of extraskeletal bone, can be disabling and lethal. However, the underlying molecular mechanisms were largely unknown. The present study aimed to clarify the involvement of secreted protein acidic and rich in cysteine (SPARC) and the underlying mechanism in rat model of HO. The mechanistic investigation on roles of SPARC in HO was examined through gain- and loss-of-function approaches of SPARC, with alkaline-phosphatase (ALP) activity, mineralized nodules, and osteocalcin (OCN) content measured. To further confirm the regulatory role of SPARC, levels of mitogen-activated protein kinase (MAPK) signaling pathways-related proteins (extracellular signal-regulated kinase (ERK), c-jun N-terminal kinase (JNK), p38, nuclear factor \u03ba-B (NF-\u03baB), and IkB kinase \u03b2 (IKK\u03b2)) were determined. Bone marrow mesenchymal stem cells were treated with pathway inhibitor to investigate the relationship among SPARC, MAPK signaling pathway, and HO. The results suggested that SPARC expression was up-regulated in Achilles tendon tissues of HO rats. Silencing of SPARC could decrease phosphorylation of ERK, JNK, p38, NF-\u03baB, and IKK\u03b2. Additionally, silencing of SPARC or inhibition of MAPK signaling pathway could reduce the ALP activity, the number of mineralized nodules, and OCN content, thus impeding HO. To sum up, our study identifies the inhibitory role of SPARC gene silencing in HO via the MAPK signaling pathway, suggesting SPARC presents a potential target for HO therapy.<\/jats:p>","DOI":"10.1042\/bsr20191805","type":"journal-article","created":{"date-parts":[[2019,9,23]],"date-time":"2019-09-23T16:49:05Z","timestamp":1569257345000},"update-policy":"https:\/\/doi.org\/10.1042\/crossmark_policy","source":"Crossref","is-referenced-by-count":26,"title":["Silencing of SPARC represses heterotopic ossification via inhibition of the MAPK signaling pathway"],"prefix":"10.1042","volume":"39","author":[{"given":"Qianjun","family":"Wang","sequence":"first","affiliation":[{"name":"Department of Orthopedics, The 89th Hospital of Chinese People\u2019s Liberation Army, Weifang 261021, P.R. 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