Biomaterials:通过近红外光远程根除钛植入物上的生物膜

2019-09-16 不详 网络

生物膜形成是治疗骨-植入物相关感染的主要挑战,导致对免疫系统和抗生素的耐受性。然而,在植入物上对抗已建立的生物膜的智能非手术或非侵入性治疗方法的报道较少。本文首次报道了由中孔聚多巴胺纳米颗粒(MPDA)组成的治疗系统以对抗生物膜。我们开发了一种协同光热/光动力疗法(PTT / PDT)策略,旨在根据钛(Ti)植入物的生物膜根除,其通过π-π堆叠与MPDA负载与光敏剂吲哚菁绿(ICG)整合。具体而言

生物膜形成是治疗骨-植入物相关感染的主要挑战,导致对免疫系统和抗生素的耐受性。然而,在植入物上对抗已建立的生物膜的智能非手术或非侵入性治疗方法的报道较少。本文首次报道了由中孔聚多巴胺纳米颗粒(MPDA)组成的治疗系统以对抗生物膜。

我们开发了一种协同光热/光动力疗法(PTT / PDT)策略,旨在根据钛(Ti)植入物的生物膜根除,其通过π-π堆叠与MPDA负载与光敏剂吲哚菁绿(ICG)整合。具体而言,MPDA用RGD肽功能化,赋予修饰的Ti样品(Ti-M / I / RGD)良好的细胞相容性。更重要的是,Ti-M / I / RGD植入物在近红外(NIR)下显着杀死金黄色葡萄球菌(金黄色葡萄球菌)生物膜,体内效率为95.4%。在生物膜根除后,植入物仍然在骨生成和骨整合方面表现出很好的表现。

总的来说,这项研究为开发抗菌钛植入物提供了PTT / PDT技术,可用于潜在的正畸应用。

原始出处:

Yuan Z, Tao B, et al., Remote eradication of biofilm on titanium implant via near-infrared light triggered photothermal/photodynamic therapy strategy. Biomaterials. 2019 Sep 6;223:119479. doi: 10.1016/j.biomaterials.2019.119479. 

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    2020-02-19 sunylz
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    2019-12-03 30397613
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    2020-06-04 风铃830
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    2019-09-18 jiyangfei