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dc.contributor.authorTrevant, Brune
dc.contributor.authorGaur, Tripti
dc.contributor.authorHussain, Sadiq
dc.contributor.authorSymons, John
dc.contributor.authorKomm, Barry S.
dc.contributor.authorBodine, Peter V. N.
dc.contributor.authorStein, Gary S.
dc.contributor.authorLian, Jane B.
dc.date2022-08-11T08:10:57.000
dc.date.accessioned2022-08-23T17:26:21Z
dc.date.available2022-08-23T17:26:21Z
dc.date.issued2008-10-24
dc.date.submitted2011-01-11
dc.identifier.citationJ Cell Physiol. 2008 Oct;217(1):113-26. <a href="http://dx.doi.org/10.1002/jcp.21482">Link to article on publisher's site</a>
dc.identifier.issn0021-9541 (Linking)
dc.identifier.doi10.1002/jcp.21482
dc.identifier.pmid18498122
dc.identifier.urihttp://hdl.handle.net/20.500.14038/49617
dc.description.abstractSecreted frizzled related protein-1 (sFRP1), an antagonist of Wnt signaling, regulates cell proliferation, differentiation and apoptosis and negatively regulates bone formation. The spatial and temporal pattern of endogenous sFRP1 expression and loss-of-function were examined in the sFRP1-LacZ knock-in mouse (sFRP1-/-) during embryonic development and post-natal growth. beta-gal activity representing sFRP1 expression is robust in brain, skeleton, kidney, eye, spleen, abdomen, heart and somites in early embryos, but sFRP1 gene inactivation in these tissues did not compromise normal embryonic and post-natal development. Kidney histology revealed increased numbers of glomeruli in KO mice, observed after 5 years of breeding. In the skeleton, we show sFRP1 expression is found in relation to the mineralizing front of bone tissue during skeletal development from E15.5 to birth. Trabecular bone volume and bone mineral density in the sFRP1-/- mouse compared to WT was slightly increased during post-natal growth. Calvarial osteoblasts from newborn sFRP1-/- mice exhibited a 20% increase in cell proliferation and differentiation at the early stages of osteoblast maturation. sFRP1 expression was observed in osteoclasts, but this did not affect osteoclast number or activity. These findings have identified functions for sFRP1 in kidney and bone that are not redundant with other sFRPs. In summary, the absence of major organ abnormalities, the enhanced bone formation and a normal life span with no detection of spontaneous tumors suggests that targeting sFRP1 can be used as a therapeutic strategy for increasing bone mass in metabolic bone disorders or promoting fracture healing by modulating Wnt signaling.
dc.language.isoen_US
dc.relation<a href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Retrieve&list_uids=18498122&dopt=Abstract">Link to Article in PubMed</a>
dc.relation.urlhttp://dx.doi.org/10.1002/jcp.21482
dc.subjectAnimals
dc.subjectBlotting, Northern
dc.subjectBone Density
dc.subjectBone Remodeling
dc.subjectBone and Bones
dc.subjectBrain
dc.subjectCell Differentiation
dc.subject*Embryonic Development
dc.subjectKidney
dc.subjectMice
dc.subjectMice, Knockout
dc.subjectOsteogenesis
dc.subjectProteins
dc.subjectCell Biology
dc.titleExpression of secreted frizzled related protein 1, a Wnt antagonist, in brain, kidney, and skeleton is dispensable for normal embryonic development
dc.typeJournal Article
dc.source.journaltitleJournal of cellular physiology
dc.source.volume217
dc.source.issue1
dc.identifier.legacycoverpagehttps://escholarship.umassmed.edu/stein/46
dc.identifier.contextkey1724086
html.description.abstract<p>Secreted frizzled related protein-1 (sFRP1), an antagonist of Wnt signaling, regulates cell proliferation, differentiation and apoptosis and negatively regulates bone formation. The spatial and temporal pattern of endogenous sFRP1 expression and loss-of-function were examined in the sFRP1-LacZ knock-in mouse (sFRP1-/-) during embryonic development and post-natal growth. beta-gal activity representing sFRP1 expression is robust in brain, skeleton, kidney, eye, spleen, abdomen, heart and somites in early embryos, but sFRP1 gene inactivation in these tissues did not compromise normal embryonic and post-natal development. Kidney histology revealed increased numbers of glomeruli in KO mice, observed after 5 years of breeding. In the skeleton, we show sFRP1 expression is found in relation to the mineralizing front of bone tissue during skeletal development from E15.5 to birth. Trabecular bone volume and bone mineral density in the sFRP1-/- mouse compared to WT was slightly increased during post-natal growth. Calvarial osteoblasts from newborn sFRP1-/- mice exhibited a 20% increase in cell proliferation and differentiation at the early stages of osteoblast maturation. sFRP1 expression was observed in osteoclasts, but this did not affect osteoclast number or activity. These findings have identified functions for sFRP1 in kidney and bone that are not redundant with other sFRPs. In summary, the absence of major organ abnormalities, the enhanced bone formation and a normal life span with no detection of spontaneous tumors suggests that targeting sFRP1 can be used as a therapeutic strategy for increasing bone mass in metabolic bone disorders or promoting fracture healing by modulating Wnt signaling.</p>
dc.identifier.submissionpathstein/46
dc.contributor.departmentDepartment of Cell Biology
dc.source.pages113-26


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