Biofabrication:3D打印支架具有抗菌成骨性能

2018-03-13 MedSci MedSci原创

随着骨移植材料的广泛应用,细菌感染带来了重大风险。设计具有良好抗菌性能和良好骨形成活性的骨移植物对于骨组织工程具有特别重要的意义。本研究中,研究人员使用3D打印方法来制备β-磷酸三钙(β-TCP)生物陶瓷支架。通过液体化学还原方法将银(Ag)纳米颗粒均匀分散在氧化石墨烯(GO)上以形成具有不同Ag与氧化石墨烯量比的均匀纳米复合材料(Ag@GO)。Ag@GO纳米复合材料通过简单的浸泡方法在β-TCP

随着骨移植材料的广泛应用,细菌感染带来了重大风险。设计具有良好抗菌性能和良好骨形成活性的骨移植物对于骨组织工程具有特别重要的意义。本研究中,研究人员使用3D打印方法来制备β-磷酸三钙(β-TCP)生物陶瓷支架。

通过液体化学还原方法将银(Ag)纳米颗粒均匀分散在氧化石墨烯(GO)上以形成具有不同Ag与氧化石墨烯量比的均匀纳米复合材料(Ag@GO)。Ag@GO纳米复合材料通过简单的浸泡方法在β-TCP支架上成功修饰以实现具有抗菌和成骨活性的双功能生物材料。制备的支架具有三角形孔道形貌的连接网络,并且通过Ag@GO纳米复合层均匀修饰β-TCP支架的表面。通过改变Ag @ GO纳米复合材料的涂布时间和浓度来控制支架中的Ag含量。使用革兰氏阴性菌(大肠杆菌,大肠杆菌)评估支架的抗菌活性。

结果表明,具有Ag@GO纳米复合材料的支架具有优异的抗菌活性。此外,涂覆Ag@GO纳米复合材料的支架通过改善碱性磷酸酶活性和骨相关基因表达(骨桥蛋白、基因缺陷相关转录因子2、骨钙蛋白和骨涎蛋白)明显加速了兔骨髓基质细胞的成骨分化。

这项研究表明,具有抗菌和成骨活性组合的双功能支架可用于重建大骨缺损,同时预防或治疗感染

原始出处:


Zhang Y, Zhai D, et al., 3D-printed bioceramic scaffolds with antibacterial and osteogenic activity. Biofabrication. 2017 Jun 20;9(2):025037. doi: 10.1088/1758-5090/aa6ed6.

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    2018-08-24 sunylz
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    2018-03-15 zhaojie88
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    2018-03-13 忠诚向上

    好好努力.继续学习

    0