Acta Biomater:镁离子在骨再生中的作用涉及经典的Wnt信号传导途径

2019-06-13 不详 网络

镁(Mg)基植入物已经引起学术界和医学界的兴趣。吸引力很大程度上归因于Mg的生物降解性和增强骨愈合和形成的能力。然而,镁如何调节骨生成的潜在机制仍不清楚。基于我们之前的体内和分子信号传导工作,证明了Mg的成骨作用,目前的研究旨在扩展这项工作的分子水平,特别是我们也观察和量化使用镁板和螺钉的兔骨折模型骨髓空间中的矿物质沉积。微CT的组织学分析和定量结果显示在手术后8周和16周时矿化沉积和骨体积显著增

镁(Mg)基植入物已经引起学术界和医学界的兴趣。吸引力很大程度上归因于Mg的生物降解性和增强骨愈合和形成的能力。然而,镁如何调节骨生成的潜在机制仍不清楚。基于我们之前的体内和分子信号传导工作,证明了Mg的成骨作用,目前的研究旨在扩展这项工作的分子水平,特别是我们也观察和量化使用镁板和螺钉的兔骨折模型骨髓空间中的矿物质沉积。

微CT的组织学分析和定量结果显示在手术后8周和16周时矿化沉积和骨体积显著增加。这些体内结果使我们专注于研究Mg2 +对人骨髓基质细胞(hBMSCs)的影响。本研究的结果表明,当用10mM Mg2 +处理时,hBMSCs中经典Wnt信号传导通路被激活。当存在额外的Mg 2+时,活性β-连环蛋白的蛋白质表达明显增加至与阳性对照相似的水平。免疫细胞化学和LEF1和Dkk1的表达增加,即由活性β-连环蛋白直接控制的下游靶基因,证明了蛋白质易位和转录激活。

总之,这些数据表明Mg2 +通过激活经典Wnt信号传导通路诱导骨髓空间中的成骨作用,这反过来导致BMSC向成骨细胞谱系分化。

原始出处:

Hung CC, Chaya A, et al., The role of magnesium ions in bone regeneration involves the canonical Wnt signaling pathway. Acta Biomater. 2019 Jun 7. pii: S1742-7061(19)30411-8. doi: 10.1016/j.actbio.2019.06.001.

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    2020-03-24 sunylz
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    2020-01-05 windight
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    2019-06-15 lsj630
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    2019-06-15 zhwj