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新型 pH 响应性 CaO@ZIF-67-HA-ADH 涂层可有效增强钛植入物的抗菌、成骨和血管生成性能。

Novel pH-Responsive CaO@ZIF-67-HA-ADH Coating That Efficiently Enhances the Antimicrobial, Osteogenic, and Angiogenic Properties of Titanium Implants.

机构信息

Department of Orthodontics, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases, No. 44-1 Wenhua Road West, 250012 Jinan, Shandong, China.

出版信息

ACS Appl Mater Interfaces. 2023 Sep 13;15(36):42965-42980. doi: 10.1021/acsami.3c08233. Epub 2023 Sep 1.

Abstract

Titanium-based implants often lead to premature implant failure due to the lack of antimicrobial, osteogenic, and angiogenic properties. To this end, a new strategy was developed to fabricate CaO@ZIF-67-HA-ADH coating on titanium surfaces by combining calcium peroxide (CaO) nanoparticles, zeolite imidazolate framework-67 (ZIF-67), and the chemical coupling hyaluronic acid-adipic acid dihydrazide (HA-ADH). We characterized CaO@ZIF-67-HA-ADH with scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma-atomic emission spectrometry (ICP-AES). The results demonstrated that CaO@ZIF-67-HA-ADH was pH-sensitive and decomposed rapidly under acidic conditions, and it released inclusions slowly under neutral conditions. Antibacterial experiments showed that the CaO@ZIF-67-HA-ADH coating had excellent antibacterial properties and effectively killed methicillin-resistant (MRSA) and (PAO-1). Cell experiments revealed that the CaO@ZIF-67-HA-ADH coating promoted pro-osteoblast adhesion, proliferation, and differentiation and also promoted the migration and angiogenesis of human umbilical vein endothelial cells (HUVECs), exhibiting excellent osteogenic and angiogenic properties. In in vivo animal implantation experiments, the CaO@ZIF-67-HA-ADH coating exhibited strong antimicrobial activity early after implantation and excellent osseointegration later after implantation. In conclusion, the pH-responsive CaO@ZIF-67-HA-ADH coating conferred excellent antibacterial, osteogenic, and angiogenic properties to titanium implants, which effectively enhanced osseointegration of the implants and prevented bacterial infection; the coating shows promise for use in the treatment of bone defects.

摘要

钛基植入物由于缺乏抗菌、成骨和血管生成特性,常常导致植入物提前失效。为此,开发了一种新策略,通过将过氧化钙 (CaO) 纳米粒子、沸石咪唑酯骨架-67 (ZIF-67) 和化学偶联透明质酸-己二酸二酰肼 (HA-ADH) 结合在钛表面上制备 CaO@ZIF-67-HA-ADH 涂层。我们使用扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、傅里叶变换红外 (FTIR) 光谱、X 射线光电子能谱 (XPS) 和电感耦合等离子体原子发射光谱 (ICP-AES) 对 CaO@ZIF-67-HA-ADH 进行了表征。结果表明,CaO@ZIF-67-HA-ADH 对 pH 敏感,在酸性条件下迅速分解,在中性条件下缓慢释放包裹物。抗菌实验表明,CaO@ZIF-67-HA-ADH 涂层具有优异的抗菌性能,能有效杀灭耐甲氧西林金黄色葡萄球菌 (MRSA) 和铜绿假单胞菌 (PAO-1)。细胞实验表明,CaO@ZIF-67-HA-ADH 涂层促进成骨细胞的黏附、增殖和分化,同时促进人脐静脉内皮细胞 (HUVEC) 的迁移和血管生成,表现出优异的成骨和血管生成特性。在体内动物植入实验中,CaO@ZIF-67-HA-ADH 涂层在植入后早期表现出较强的抗菌活性,植入后晚期表现出良好的骨整合能力。总之,pH 响应性 CaO@ZIF-67-HA-ADH 涂层赋予钛植入物优异的抗菌、成骨和血管生成特性,有效增强了植入物的骨整合能力并防止了细菌感染;该涂层有望用于治疗骨缺损。

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