Biomaterials:含有间充质基质细胞的可注射成骨微组织共形填充并修复临界尺寸缺陷

2019-04-26 不详 网络

修复复杂骨折的骨缺损需要有效的空间填充干预来促进骨骼再生。我们提出了一种基于生物材料的策略,将间充质基质细胞(MSC)与壳聚糖-胶原基质结合,形成模块化微组织,设计用于通过针头输送以填充腔内缺损。将微组织植入小鼠的颅骨缺损中表明,成骨预分化的MSC导致缺损腔的完全桥接,而未分化的MSC仅在与天然骨并置的情况下产生矿化组织。减少植入物体积减少了骨再生,同时增加MSC浓度也减弱了骨形成,表明细胞-基质

修复复杂骨折的骨缺损需要有效的空间填充干预来促进骨骼再生。我们提出了一种基于生物材料的策略,将间充质基质细胞(MSC)与壳聚糖-胶原基质结合,形成模块化微组织,设计用于通过针头输送以填充腔内缺损。

将微组织植入小鼠的颅骨缺损中表明,成骨预分化的MSC导致缺损腔的完全桥接,而未分化的MSC仅在与天然骨并置的情况下产生矿化组织。减少植入物体积减少了骨再生,同时增加MSC浓度也减弱了骨形成,表明细胞-基质比率对于实现强烈响应是重要的。用载体凝胶中的微组织共形填充缺损导致完全愈合。

总之,这些结果表明模块化微组织可用于增强MSC的分化功能并提供加强骨修复的细胞外环境。

原始出处:

Annamalai RT, Hong X, et al., Injectable osteogenic microtissues containing mesenchymal stromal cells conformally fill and repair critical-size defects. Biomaterials. 2019 Apr 4;208:32-44. doi: 10.1016/j.biomaterials.2019.04.001.

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    2019-05-19 sunylz
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    2019-04-28 zhaojie88