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Measurements of cell proliferation, alkaline phosphatase (<jats:styled-content style=\"fixed-case\">ALP<\/jats:styled-content>) activity, alizarin red staining and osteoblast\u2010specific genes expression were performed to assess osteogenesis of <jats:styled-content style=\"fixed-case\">DFC<\/jats:styled-content>s<jats:styled-content style=\"fixed-case\"><jats:sup><jats:italic>RUNX<\/jats:italic><\/jats:sup><\/jats:styled-content><jats:sup><jats:italic>2+\/m<\/jats:italic><\/jats:sup>. Co\u2010culture of <jats:styled-content style=\"fixed-case\">DFC<\/jats:styled-content>s and peripheral blood mononuclear cells (<jats:styled-content style=\"fixed-case\">PBMC<\/jats:styled-content>s), followed tartrate\u2010resistant acid phosphatase (<jats:styled-content style=\"fixed-case\">TRAP<\/jats:styled-content>) staining, real\u2010time <jats:styled-content style=\"fixed-case\">PCR<\/jats:styled-content> and western blot were performed to evaluate osteoclast\u2010inductive capacity of <jats:styled-content style=\"fixed-case\">DFC<\/jats:styled-content>s<jats:styled-content style=\"fixed-case\"><jats:sup><jats:italic>RUNX<\/jats:italic><\/jats:sup><\/jats:styled-content><jats:sup><jats:italic>2+\/m<\/jats:italic><\/jats:sup>.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>A missense <jats:italic><jats:styled-content style=\"fixed-case\">RUNX<\/jats:styled-content>2<\/jats:italic> mutation (c. 557G&gt;C) was found in <jats:styled-content style=\"fixed-case\">DFC<\/jats:styled-content>s<jats:styled-content style=\"fixed-case\"><jats:sup><jats:italic>RUNX<\/jats:italic><\/jats:sup><\/jats:styled-content><jats:sup><jats:italic>2+\/m<\/jats:italic><\/jats:sup> from the <jats:styled-content style=\"fixed-case\">CCD<\/jats:styled-content> patient. Compared with normal controls, this mutation did not affect the proliferation of <jats:styled-content style=\"fixed-case\">DFC<\/jats:styled-content>s<jats:styled-content style=\"fixed-case\"><jats:sup><jats:italic>RUNX<\/jats:italic><\/jats:sup><\/jats:styled-content><jats:sup><jats:italic>2+\/m<\/jats:italic><\/jats:sup>, but down\u2010regulated the expression of osteogenesis\u2010related genes, leading to a decrease in <jats:styled-content style=\"fixed-case\">ALP<\/jats:styled-content> activity and mineralisation. Co\u2010culture results showed that <jats:styled-content style=\"fixed-case\">DFC<\/jats:styled-content>s<jats:styled-content style=\"fixed-case\"><jats:sup><jats:italic>RUNX<\/jats:italic><\/jats:sup><\/jats:styled-content><jats:sup><jats:italic>2+\/m<\/jats:italic><\/jats:sup> reduced the formation of <jats:styled-content style=\"fixed-case\">TRAP<\/jats:styled-content><jats:sup>+<\/jats:sup> multinucleated cells and the expression of osteoclastogenesis\u2010associated genes. Furthermore, the mutation reduced the ratio of <jats:styled-content style=\"fixed-case\">RANKL<\/jats:styled-content>\/<jats:styled-content style=\"fixed-case\">OPG<\/jats:styled-content> in <jats:styled-content style=\"fixed-case\">DFC<\/jats:styled-content>s<jats:styled-content style=\"fixed-case\"><jats:sup><jats:italic>RUNX<\/jats:italic><\/jats:sup><\/jats:styled-content><jats:sup><jats:italic>2+\/m<\/jats:italic><\/jats:sup>.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p><jats:styled-content style=\"fixed-case\">DFC<\/jats:styled-content>s<jats:styled-content style=\"fixed-case\"><jats:sup><jats:italic>RUNX<\/jats:italic><\/jats:sup><\/jats:styled-content><jats:sup><jats:italic>2+\/m<\/jats:italic><\/jats:sup> disturbs bone remodelling activity during tooth eruption through <jats:styled-content style=\"fixed-case\">RANK<\/jats:styled-content>\/<jats:styled-content style=\"fixed-case\">RANKL<\/jats:styled-content>\/<jats:styled-content style=\"fixed-case\">OPG<\/jats:styled-content> signalling pathway and may thus be responsible for impaired permanent tooth eruption in <jats:styled-content style=\"fixed-case\">CCD<\/jats:styled-content> patients.<\/jats:p><\/jats:sec>","DOI":"10.1111\/odi.12900","type":"journal-article","created":{"date-parts":[[2018,5,22]],"date-time":"2018-05-22T16:56:00Z","timestamp":1527008160000},"page":"1270-1281","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Abnormal bone remodelling activity of dental follicle cells from a cleidocranial dysplasia patient"],"prefix":"10.1111","volume":"24","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2359-6583","authenticated-orcid":false,"given":"Yang","family":"Liu","sequence":"first","affiliation":[{"name":"Department of Preventive Dentistry Peking University School and Hospital of Stomatology National Engineering Laboratory for Digital and Material Technology of Stomatology 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