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首页> 外文期刊>ACS applied materials & interfaces >Sustainable Release of Vancomycin from Silk Fibroin Nanoparticles for Treating Severe Bone Infection in Rat Tibia Osteomyelitis Model
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Sustainable Release of Vancomycin from Silk Fibroin Nanoparticles for Treating Severe Bone Infection in Rat Tibia Osteomyelitis Model

机译:来自丝素蛋白纳米粒子的万古霉素可持续释放治疗大鼠骨髓炎模型大鼠严重骨感染

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摘要

The successful treatment of bone infections is a major challenge in the field of orthopedics. There are some common methods for treating bone infections, including systemic antibiotic administration, local nondegradable drug vehicles, and surgical debridement, and each of these approaches has advantages and disadvantages. In the present study, the antibiotic vancomycin (VANCO) was loaded in silk fibroin nanoparticles (SFNPs) and the complexes were then entrapped in silk scaffolds to form sustained drug delivery systems. The release kinetics of VANCO from SFNPs alone and when the SFNPs were entrapped in silk scaffolds were assessed at two different pH values, 4.5 and 7.4, that affected the release profiles of VANCO. Disk diffusion tests performed with pathogens causing osteomyelitis methicillin-resistant Staphylococcus aureus (MRSA) showed antibacterial activity of the released drug at two different pH values. Additionally, injection of 8 x 10(6) CFU MRSA in rats tibia induced severe osteomyelitis disease. Radiographic and histopathological analyses were performed to evaluate the effectiveness of treatment after 6 weeks. The VANCO-loaded silk fibroin nanoparticles entrapped in scaffolds reduced bone infections at the defected site with better outcomes than the other treatment groups. In conclusion, the delivery system with good biocompatibility and sustained release properties would be appropriate for further study in the context of osteomyelitis disease.
机译:骨感染的成功治疗是骨科领域的主要挑战。有一些常用的方法治疗骨感染,包括全身抗生素给药,局部非抗生素毒贩和手术清创,这些方法中的每一种都具有优缺点。在本研究中,抗生素万古霉素(Vanco)在丝素蛋白纳米颗粒(SFNP)中加载,然后将配合物夹在丝绸支架中以形成持续的药物递送系统。仅在两种不同的pH值,4.5和7.4中捕获在丝网支架中捕获SFNPS时Vanco的释放动力学,并在丝网上捕获丝网标记,影响Vanco的释放轮廓。使用病原体进行的盘扩散试验,导致骨髓炎耐骨髓炎葡萄球菌(MRSA)显示出在两种不同pH值下释放药物的抗菌活性。另外,在大鼠胫骨诱导严重的骨髓炎疾病中注射8×10(6)CFU MRSA。进行射线照相和组织病理学分析以评估6周后治疗的有效性。被捕获的Vanco的丝素蛋白纳米蛋白纳米粒子夹在脚手架上,在缺陷的部位降低骨感染,比其他治疗组更好的结果。总之,具有良好的生物相容性和持续释放性能的递送系统适用于在骨髓炎疾病的背景下进一步研究。

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