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Anti-DKK1 antibody promotes bone fracture healing through activation of ?-catenin signaling.


ABSTRACT: In this study we investigated if Wnt/?-catenin signaling in mesenchymal progenitor cells plays a role in bone fracture repair and if DKK1-Ab promotes fracture healing through activation of ?-catenin signaling. Unilateral open transverse tibial fractures were created in CD1 mice and in ?-catenin(Prx1ER) conditional knockout (KO) and Cre-negative control mice (C57BL/6 background). Bone fracture callus tissues were collected and analyzed by radiography, micro-CT (?CT), histology, biomechanical testing and gene expression analysis. The results demonstrated that treatment with DKK1-Ab promoted bone callus formation and increased mechanical strength during the fracture healing process in CD1 mice. DKK1-Ab enhanced fracture repair by activation of endochondral ossification. The normal rate of bone repair was delayed when the ?-catenin gene was conditionally deleted in mesenchymal progenitor cells during the early stages of fracture healing. DKK1-Ab appeared to act through ?-catenin signaling to enhance bone repair since the beneficial effect of DKK1-Ab was abrogated in ?-catenin(Prx1ER) conditional KO mice. Further understanding of the signaling mechanism of DKK1-Ab in bone formation and bone regeneration may facilitate the clinical translation of this anabolic agent into therapeutic intervention.

SUBMITTER: Jin H 

PROVIDER: S-EPMC4376475 | biostudies-literature | 2015 Feb

REPOSITORIES: biostudies-literature

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Anti-DKK1 antibody promotes bone fracture healing through activation of β-catenin signaling.

Jin Hongting H   Wang Baoli B   Li Jia J   Xie Wanqing W   Mao Qiang Q   Li Shan S   Dong Fuqiang F   Sun Yan Y   Ke Hua-Zhu HZ   Babij Philip P   Tong Peijian P   Chen Di D  

Bone 20140928


In this study we investigated if Wnt/β-catenin signaling in mesenchymal progenitor cells plays a role in bone fracture repair and if DKK1-Ab promotes fracture healing through activation of β-catenin signaling. Unilateral open transverse tibial fractures were created in CD1 mice and in β-catenin(Prx1ER) conditional knockout (KO) and Cre-negative control mice (C57BL/6 background). Bone fracture callus tissues were collected and analyzed by radiography, micro-CT (μCT), histology, biomechanical test  ...[more]

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