Biomaterials:在钛植入物上制造镁/锌 - 金属有机骨架,以抑制细菌感染并促进骨再生

2019-05-25 不详 网络

由感染引起的二次修复手术中的残留细菌将进一步导致植入失败。致病菌粘附到植体表面不仅干扰骨形成相关细胞的功能,而且还激活宿主免疫系统,从而导致炎症和成骨抑制。因此,为了制造多功能(抗菌,抗炎和促成骨)钛植入物对于解决该问题是必不可少的。在这项工作中,在碱热处理的钛(AT)表面上构建了杂化的镁/锌-金属有机骨架(Mg/Zn-MOF74)涂层。结果显示,Mg / Zn-MOF74杂化涂层具有良好的稳定性

感染引起的二次修复手术中的残留细菌将进一步导致植入失败。致病菌粘附到植体表面不仅干扰骨形成相关细胞的功能,而且还激活宿主免疫系统,从而导致炎症和成骨抑制。因此,为了制造多功能(抗菌,抗炎和促成骨)钛植入物对于解决该问题是必不可少的。

在这项工作中,在碱热处理的钛(AT)表面上构建了杂化的镁/锌-金属有机骨架(Mg/Zn-MOF74)涂层。

结果显示,Mg / Zn-MOF74杂化涂层具有良好的稳定性,其稳定性与Zn2 +的含量有关。 MOF74修饰的样品对细菌酸性微环境敏感,并且由于MOF74涂层的降解,对大肠杆菌和金黄色葡萄球菌表现出强大的抗菌能力,导致碱性微环境(约pH8.0)和降解产物(2,5-二羟基对苯二甲酸和Zn2 +)。该涂层还对天然Ti基底显示出良好的早期抗炎特性。

体内结果进一步证实了AT-Mg / Zn3植入物在植入早期具有高抗菌和抗炎特性,并且在未感染和感染的股骨部位处大大改善了植入物周围的新骨形成。

原始出处:

Shen X, Zhang Y, et al., Fabrication of magnesium/zinc-metal organic framework on titanium implants to inhibit bacterial infection and promote bone regeneration. Biomaterials. 2019 May 9;212:1-16. doi: 10.1016/j.biomaterials.2019.05.008.

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    2020-01-24 sunylz
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    2020-01-03 30397613
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    2019-05-27 lsj630
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    2019-05-27 jiyangfei