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Li, Defang; Liu, Jin; Guo, Baosheng; Liang, Chao; Dang, Lei; Lu, Cheng; He, Xiaojuan; Cheung, Hilda Yeuk-Siu; Xu, Liang; Lu, Changwei; He, Bing; Liu, Biao; Shaikh, Atik Badshah; Li, Fangfei; Wang, Luyao; Yang, Zhijun; Au, Doris Wai-Ting; Peng, Songlin; Zhang, Zongkang; Zhang, Bao-Ting; Pan, Xiaohua; Qian, Airong; Shang, Peng; Xiao, Lianbo; Jiang, Baohong; Wong, Chris Kong-Chu; Xu, Jiake; Bian, Zhaoxiang; Liang, Zicai; Guo, De-An; Zhu, Hailong; Tan, Weihong; Lu, Aiping; Zhang, Ge
Nature communications, 03/2016, Volume: 7, Issue: 1Journal Article
Emerging evidence indicates that osteoclasts direct osteoblastic bone formation. MicroRNAs (miRNAs) have a crucial role in regulating osteoclast and osteoblast function. However, whether miRNAs mediate osteoclast-directed osteoblastic bone formation is mostly unknown. Here, we show that increased osteoclastic miR-214-3p associates with both elevated serum exosomal miR-214-3p and reduced bone formation in elderly women with fractures and in ovariectomized (OVX) mice. Osteoclast-specific miR-214-3p knock-in mice have elevated serum exosomal miR-214-3p and reduced bone formation that is rescued by osteoclast-targeted antagomir-214-3p treatment. We further demonstrate that osteoclast-derived exosomal miR-214-3p is transferred to osteoblasts to inhibit osteoblast activity in vitro and reduce bone formation in vivo. Moreover, osteoclast-targeted miR-214-3p inhibition promotes bone formation in ageing OVX mice. Collectively, our results suggest that osteoclast-derived exosomal miR-214-3p transfers to osteoblasts to inhibit bone formation. Inhibition of miR-214-3p in osteoclasts may be a strategy for treating skeletal disorders involving a reduction in bone formation.
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