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Orthopaedic Proceedings
Vol. 96-B, Issue SUPP_11 | Pages 212 - 212
1 Jul 2014
Suen P He Y Chow D Huang L Li C Ke H Qin L
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Summary Statement

This study demonstrated that Sclerostin monoclonal antibody (Scl-Ab) enhanced bone healing in the rat osteotomy model. Scl-Ab increased callus size, callus bone volume fraction, rate of callus bone formation and fracture callus strength.

Introduction

Sclerostin is a protein secreted by osteocytes and is characterized as a key inhibitor of osteoblast-mediated bone formation. Previous studies demonstrated that treatment with a sclerostin monoclonal antibody (Scl-Ab) results in significantly increased bone formation, bone mass and strength in rat closed fracture model (1–2). However, the effects of Scl-Ab on healing of open fracture model have not yet been reported in rats. Previously in ORS and ASBMR Annual Meeting, we have reported that Scl-Ab promoted the open fracture healing at week 3 and week 6 post-fracture. Here we extended our investigation for up to week 9 with additional histological assessments and dynamic histomorphometric analysis to investigate the effects of systemic administration of Scl-Ab on a later phase of fracture repair.