J Tissue Eng Regen Med:新型水凝胶可有效修复恒河猴腰椎缺损

2019-11-28 不详 网络

致密的生物材料在骨置换中起着重要的作用。但是,它不能诱导骨细胞迁移到移植材料中。在本研究中,研究人员设计并制备了由多孔梯度羟基磷灰石/氧化锆复合物(PGHC)和明胶/壳聚糖缓释水凝胶组成的新型骨移植替代物(BGS),其中包含骨形态发生蛋白2和骨间充质干细胞以修复腰椎缺陷。通过扫描电子显微镜评估的BGS的形态特征表明,它具有三维网络结构,在接枝材料的表面和孔的内部均具有均匀分布的壳聚糖微球。然后,将

致密的生物材料在骨置换中起着重要的作用。但是,它不能诱导骨细胞迁移到移植材料中。在本研究中,研究人员设计并制备了由多孔梯度羟基磷灰石/氧化锆复合物(PGHC)和明胶/壳聚糖缓释水凝胶组成的新型骨移植替代物(BGS),其中包含骨形态发生蛋白2和骨间充质干细胞以修复腰椎缺陷。

通过扫描电子显微镜评估的BGS的形态特征表明,它具有三维网络结构,在接枝材料的表面和孔的内部均具有均匀分布的壳聚糖微球。然后,将BGS(A组),PGHC(B组)或自体骨(C组)植入总共24只健康恒河猴的腰椎椎体缺损中。 8周和16周后,对腰椎进行前后X线照片,显微计算机断层扫描,组织形态测定,生物力学测试和生化测试,以检测骨基质标志物,包括I型胶原蛋白,骨钙蛋白,骨桥蛋白,碱性成纤维细胞生长因子,碱性磷酸酶和血管进行内皮生长因子检查以检查BGS和PGHC的修复功效。

结果显示,BGS具有很好的修复恒河猴腰椎缺损的能力。X线,显微计算机断层扫描和组织形态学表征显示,BGS孔内部新形成的骨量明显高于PGHC。生物力学测试结果表明,PGHC植入物的椎体抗压强度低于其他植入物。逆转录聚合酶链反应和蛋白质印迹分析表明,BGS植入物中骨骼相关蛋白的表达明显高于PGHC植入物中。BGS显示出与自体骨相似的修复效果。

因此,该研究结果表明,在椎骨缺损修复中使用BGS似乎很有希望。

原始出处:

Shao RX, Quan RF, et al., Effects of a bone graft substitute consisting of porous gradient HA/ZrO2 and gelatin/chitosan slow-release hydrogel containing BMP-2 and BMSCs on lumbar vertebral defect repair in rhesus monkey. J Tissue Eng Regen Med. 2018 Mar;12(3):e1813-e1825. doi: 10.1002/term.2601. Epub 2017 Dec 26.

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    2020-06-29 xuyu
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    2019-12-01 spoonycyy
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    2019-11-30 tastas
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