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However, its role in bone homeostasis is not known. In the present study, a phenotype-driven ENU mouse mutagenesis screen revealed that Morc3<jats:sup>mut +\/\u2212<\/jats:sup> mice exhibit reduced cortical area and thickness with increased cortical porosity. Morc3<jats:sup>mut +\/\u2212<\/jats:sup> mice displayed reduced osteoclast numbers and surface per bone surface as well as osteocyte numbers, concomitant with altered gene expressions such as <jats:italic>Rankl\/Opg<\/jats:italic> and <jats:italic>Sost<\/jats:italic> in <jats:italic>ex vivo<\/jats:italic> long bones. <jats:italic>In vitro<\/jats:italic> experiments revealed a significant increase in the number of Sca-1<jats:sup>+<\/jats:sup>\/c-kit<jats:sup>+<\/jats:sup> haematopoietic stem cells (HSCs) and a significant reduction in senescence associated \u03b2-galactosidase activity in bone marrow macrophages (BMMs). In addition, we observed a decrease in osteoclastogenesis and bone resorption accompanied by upregulation of STAT1 expression in osteoclast lineage cells. Strikingly, Morc3 protein localization within the nuclear membrane was shifted to the cytoplasm in Morc3<jats:sup>mut +\/\u2212<\/jats:sup> osteoclasts. Further, Morc3<jats:sup>mut +\/\u2212<\/jats:sup> mice displayed increased osteoblast differentiation and altered gene expression. Collectively, our data show that Morc3 is a previously unreported regulator of cortical bone homeostasis and haematopoietic stem cells niche, accompanied by altered bone cell differentiation.<\/jats:p>","DOI":"10.1038\/srep25964","type":"journal-article","created":{"date-parts":[[2016,5,18]],"date-time":"2016-05-18T09:08:57Z","timestamp":1463562537000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":36,"title":["Morc3 mutant mice exhibit reduced cortical area and thickness, accompanied by altered haematopoietic stem cells niche and bone cell differentiation"],"prefix":"10.1038","volume":"6","author":[{"given":"Gaurav","family":"Jadhav","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dian","family":"Teguh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jacob","family":"Kenny","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jennifer","family":"Tickner","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiake","family":"Xu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2016,5,18]]},"reference":[{"key":"BFsrep25964_CR1","doi-asserted-by":"publisher","first-page":"337","DOI":"10.1038\/nature01658","volume":"423","author":"WJ Boyle","year":"2003","unstructured":"Boyle, W. 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