J Biomed Mater Res A:Zn-GO改性钛基底可有效发挥抗菌成骨作用

2019-06-10 不详 网络

骨结合不良和术后细菌感染是临床上钛(Ti)基种植体失效的主要原因。为了解决上述问题,采用阴极电泳沉积(EPD)在Ti基底上制备了甲基丙烯酰基改性氧化石墨烯(GOMA)作为锌离子(Zn2 +)储库和释放平台。然后,苯硼酸(PBA)官能化甲基丙烯酰基-明胶(GelMA-PBA)通过原位自由基聚合反应与GOMA反应,制备GO-Zn/GelMA-PBA涂层。通过扫描电子显微镜(SEM),X射线光电子能谱(

骨结合不良和术后细菌感染临床上钛(Ti)基种植体失效的主要原因。为了解决上述问题,采用阴极电泳沉积(EPD)在Ti基底上制备了甲基丙烯酰基改性氧化石墨烯(GOMA)作为锌离子(Zn2 +)储库和释放平台。然后,苯硼酸(PBA)官能化甲基丙烯酰基-明胶(GelMA-PBA)通过原位自由基聚合反应与GOMA反应,制备GO-Zn/GelMA-PBA涂层。

通过扫描电子显微镜(SEM),X射线光电子能谱(XPS)和Zn离子释放性质分别确认所获得的涂层。体外细胞实验包括细胞活性,碱性磷酸酶(ALP),胶原蛋白分泌,细胞外基质(ECM)矿化,成骨基因和蛋白质,揭示GO-Zn/GelMA-PBA涂层有利于增强成骨细胞的粘附,增殖和分化。阳性结果与明胶的存在,PBA组之间硼酸酯的形成和成骨细胞表面的碳水化合物有关。同时,针对金黄色葡萄球菌(金黄色葡萄球菌)和铜绿假单胞菌(铜绿假单胞菌)的抗菌试验证实,Ti基底上的GO-Zn/GelMA-PBA涂层具有优异的抗菌能力,有效抑制细菌粘附并防止生物膜形成。

综上所述,该研究为在整形外科应用的Ti基底上设计促成骨和抗菌涂层提供了一种有前景的策略。

原始出处:

Tao B, Chen M, et al., Zn-incorporation with graphene oxide on Ti substrates surface to improve osteogenic activity and inhibit bacterial adhesion. J Biomed Mater Res A. 2019 Jun 3. doi: 10.1002/jbm.a.36740. 

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