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dc.contributor.authorKo, Kang I.-
dc.contributor.authorCoimbra, Leila S.-
dc.contributor.authorTian, Chen-
dc.contributor.authorAlblowi, Jazia-
dc.contributor.authorKayal, Rayyan A.-
dc.contributor.authorEinhorn, Thomas A.-
dc.contributor.authorGerstenfeld, Louis C.-
dc.contributor.authorPignolo, Robert J.-
dc.contributor.authorGraves, Dana T.-
dc.date.accessioned2015-10-21T13:10:43Z-
dc.date.accessioned2016-10-25T20:59:50Z-
dc.date.available2015-10-21T13:10:43Z-
dc.date.available2016-10-25T20:59:50Z-
dc.date.issued2015-03-01-
dc.identifierhttp://link.springer.com/article/10.1007%2Fs00125-014-3470-y-
dc.identifier.citationDiabetologia. New York: Springer, v. 58, n. 3, p. 633-642, 2015.-
dc.identifier.issn0012-186X-
dc.identifier.urihttp://hdl.handle.net/11449/128532-
dc.identifier.urihttp://acervodigital.unesp.br/handle/11449/128532-
dc.description.abstractDiabetes interferes with bone formation and impairs fracture healing, an important complication in humans and animal models. The aim of this study was to examine the impact of diabetes on mesenchymal stem cells (MSCs) during fracture repair.Fracture of the long bones was induced in a streptozotocin-induced type 1 diabetic mouse model with or without insulin or a specific TNF alpha inhibitor, pegsunercept. MSCs were detected with cluster designation-271 (also known as p75 neurotrophin receptor) or stem cell antigen-1 (Sca-1) antibodies in areas of new endochondral bone formation in the calluses. MSC apoptosis was measured by TUNEL assay and proliferation was measured by Ki67 antibody. In vitro apoptosis and proliferation were examined in C3H10T1/2 and human-bone-marrow-derived MSCs following transfection with FOXO1 small interfering (si)RNA.Diabetes significantly increased TNF alpha levels and reduced MSC numbers in new bone area. MSC numbers were restored to normal levels with insulin or pegsunercept treatment. Inhibition of TNF alpha significantly reduced MSC loss by increasing MSC proliferation and decreasing MSC apoptosis in diabetic animals, but had no effect on MSCs in normoglycaemic animals. In vitro experiments established that TNF alpha alone was sufficient to induce apoptosis and inhibit proliferation of MSCs. Furthermore, silencing forkhead box protein O1 (FOXO1) prevented TNF alpha-induced MSC apoptosis and reduced proliferation by regulating apoptotic and cell cycle genes.Diabetes-enhanced TNF alpha significantly reduced MSC numbers in new bone areas during fracture healing. Mechanistically, diabetes-enhanced TNF alpha reduced MSC proliferation and increased MSC apoptosis. Reducing the activity of TNF alpha in vivo may help to preserve endogenous MSCs and maximise regenerative potential in diabetic patients.en
dc.format.extent633-642-
dc.language.isoeng-
dc.publisherSpringer-
dc.sourceWeb of Science-
dc.subjectAnti-TNFen
dc.subjectCytokineen
dc.subjectDiabetesen
dc.subjectForkheaden
dc.subjectFracture healingen
dc.subjectHyperglycaemiaen
dc.subjectInflammationen
dc.subjectMesenchymal stem cellen
dc.subjectTumour necrosis factoren
dc.titleDiabetes reduces mesenchymal stem cells in fracture healing through a TNF alpha-mediated mechanismen
dc.typeoutro-
dc.contributor.institutionUniversity of Pennsylvania-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionKing Abdulaziz University-
dc.contributor.institutionBoston University-
dc.description.affiliationDepartment of Periodontics, University of Pennsylvania, 240 S 40th St, Levy 122, Philadelphia, PA, 19104, USA-
dc.description.affiliationDepartment of Oral Basic and Clinical Sciences, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia-
dc.description.affiliationDepartment of Orthopaedic Surgery, School of Medicine, Boston University, Boston, MA, USA-
dc.description.affiliationDepartment of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA-
dc.description.affiliationDepartment of Orthopaedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA-
dc.description.affiliationUnespUniversidade Estadual Paulista, Department of Physiology and Pathology, Araraquara Dental School, Araraquara, São Paulo, Brazil-
dc.identifier.doihttp://dx.doi.org/10.1007/s00125-014-3470-y-
dc.identifier.wosWOS:000349244100025-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofDiabetologia-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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