Osterix enhances BMSC-associated osseointegration of implants.

Osterix enhances BMSC-associated osseointegration of implants.
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DOI:
10.1177/0022034509346928
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发表时间:
2009-11
影响因子:
7.6
通讯作者:
Chen J
Chen J
中科院分区:
医学1区
文献类型:
--
作者:
Xu B;Zhang J;Brewer E;Tu Q;Yu L;Tang J;Krebsbach P;Wieland M;Chen J

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种植体表面骨整合中的细胞和分子事件在很大程度上仍不清楚。我们假设骨髓基质细胞(BMSCs)参与了这一过程,Osterix(OSX)促进了种植体的骨整合。为了证明这一假设,我们跟踪了裸鼠移植这些细胞后产生的植入部位的双标记BMSCs。我们还在我们已建立的转基因小鼠的股骨内植入了OSX编码病毒的局部注射,以确定OSX的成骨作用。免疫组织化学结果显示,植入后BMSCs可从外周循环中募集,参与创面愈合和骨整合。显微计算机断层扫描(MicroCT)分析显示,OSX组的骨-种植体界面处的骨密度增加,组织形态计量学分析显示,OSX组的骨-种植体接触水平增加。我们得出结论,外源性BMSCs参与了植入后的骨整合,OSX过表达促进了骨整合。
Cellular and molecular events in osseointegration at the dental implant surface remain largely unknown. We hypothesized that bone marrow stromal cells (BMSCs) participate in this process, and that osterix (Osx) promotes implant osseointegration. To prove this hypothesis, we tracked double-labeled BMSCs in implantation sites created in nude mice transplanted with these cells. We also inserted implants into the femurs of our established transgenic mice after local administration of viruses encoding Osx, to determine the osteogenic effects of Osx. Immunohistochemical results demonstrated that BMSCs can recruit from peripheral circulation and participate in wound healing and osseointegration after implantation. Microcomputed tomography (microCT) analysis revealed an increased bone density at the bone-to-implant interface in the Osx group, and histomorphometric analysis indicated an elevated level of bone-to-implant contact in the Osx group. We concluded that exogenous BMSCs participate in the osseointegration after implantation, and that Osx overexpression accelerates osseointegration.
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