Int J Nanomed:仿生的纤维内矿化胶原通过激活Wnt信号传导途径促进骨再生

2019-02-04 MedSci MedSci原创

本研究旨在评估仿生纤维内纤维化矿化胶原(IMC)骨支架材料对骨再生及其潜在生物学机制的影响。 创建了大鼠股骨中一个临界尺寸的骨缺损,然后将IMC,纤维外矿化胶原和纳米羟基磷灰石骨支架材料移植到缺损处。植入后10周,应用微型计算机断层扫描和组织学来评估骨再生。此外,微阵列技术应用于术后两个时间点(7天和14天)的转录谱分析。随后,通过免疫组织化学分析和体外通过定量实时转录聚合酶链反应评估在体内验证通

本研究旨在评估仿生纤维内纤维化矿化胶原(IMC)骨支架材料对骨再生及其潜在生物学机制的影响。

创建了大鼠股骨中一个临界尺寸的骨缺损,然后将IMC,纤维外矿化胶原和纳米羟基磷灰石骨支架材料移植到缺损处。植入后10周,应用微型计算机断层扫描和组织学来评估骨再生。此外,微阵列技术应用于术后两个时间点(7天和14天)的转录谱分析。随后,通过免疫组织化学分析和体外通过定量实时转录聚合酶链反应评估在体内验证通过转录分析鉴定的涉及骨再生的关键基因。

基于微型计算机断层扫描和组织学评估,在IMC组中发现显着增加的新骨形成(P <0.05)。转录分析显示,IMC引导的骨再生的早期过程涉及主要与炎症,免疫应答,骨骼发育,血管生成,神经发生和Wnt信号传导通路相关的基因的过表达。在体内和体外进一步证实了Wnt信号传导通路相关因子Wnt5a,β-连环蛋白和Axin2的作用。

综上所述,该研究结果表明,IMC骨支架材料通过激活Wnt信号传导通路显著增强骨再生。

原始出处:

Zhang Z, Li Z, et al., Biomimetic intrafibrillar mineralized collagen promotes bone regeneration via activation of the Wnt signaling pathway. Int J Nanomedicine. 2018 Nov 21;13:7503-7516. doi: 10.2147/IJN.S172164. eCollection 2018.

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    2019-08-15 yahu
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    2019-02-05 lsj630
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    2019-02-05 zhwj
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