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    Regulation of osteoclast function and bone mass by RAGE

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    Authors
    Zhou, Zheng
    Immel, David
    Xi, Cai-Xia
    Bierhaus, Angelika
    Feng, Xu
    Mei, Lin
    Nawroth, Peter
    Stern, David M.
    Xiong, Wen-Cheng
    Issue Date
    2006-04-17
    URI
    http://hdl.handle.net/10675.2/543
    
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    Abstract
    The receptor for advanced glycation end products (RAGE) is a member of the immunoglobulin superfamily that has multiple ligands and is implicated in the pathogenesis of various diseases, including diabetic complications, neurodegenerative disorders, and inflammatory responses. However, the role of RAGE in normal physiology is largely undefined. Here, we present evidence for a role of RAGE in osteoclast maturation and function, which has consequences for bone remodeling. Mice lacking RAGE had increased bone mass and bone mineral density and decreased bone resorptive activity in vivo. In vitroâ differentiated RAGE-deficient osteoclasts exhibited disrupted actin ring and sealing zone structures, impaired maturation, and reduced bone resorptive activity. Impaired signaling downstream of αvβ3 integrin was observed in RAGEâ /â bone marrow macrophages and precursors of OCs. These results demonstrate a role for RAGE in osteoclast actin cytoskeletal reorganization, adhesion, and function, and suggest that the osteosclerotic-like phenotype observed in RAGE knockout mice is due to a defect in osteoclast function.
    Citation
    J Exp Med. 2006 Apr 17; 203(4):1067-1080
    ae974a485f413a2113503eed53cd6c53
    10.1084/jem.20051947
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