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Inhibition of fibrillation of human serum albumin through interaction with chitosan-based biocompatible silver nanoparticles

机译:通过与壳聚糖基生物相容性银纳米粒子相互作用抑制人血清白蛋白的纤维化

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To understand the pharmacokinetics of administered nanomaterials, it is essential to examine the stability and biological activity of proteins by investigating the physicochemical characteristics of the protein–nanoparticle bioconjugate. In this work, the mechanistic detail of the interaction between human serum albumin (HSA) and silver nanoparticles synthesized using nontoxic and biodegradable chitosan as a reducing and stabilizing agent, have been investigated at the nanobio interface. A combination of spectroscopic, calorimetric, and microscopic techniques have been employed to monitor the interaction process. The results illustrate that the chitosan-mediated silver nanoparticles spontaneously bind to HSA without appreciable conformational changes of the protein. Furthermore the potential of the nanoparticles to inhibit the formation of HSA amyloid-like fibrils, in vitro , has been analyzed using thioflavin T fluorescence, circular dichroism, fluorescence microscopy, and transmission electron microscopy. The experimental observations indicate that interactions between HSA and chitosan-based silver nanoparticles have led to appreciable reduction in amyloid fibril formation. Additionally, cytotoxicity and hemolytic assays are performed to ensure the biocompatibility of the nanoparticles within the application limit.
机译:为了了解给药纳米材料的药代动力学,必须通过研究蛋白质 - 纳米粒子生物缀合物的物理化学特征来检查蛋白质的稳定性和生物活性。在这项工作中,已经研究了使用无毒和可生物降解的壳聚糖作为还原剂和稳定剂合成的人血清白蛋白(HSA)和银纳米粒子相互作用的机制细节,并在纳米酰亚髂型中研究。已经采用光谱,量热和微观技术的组合来监测相互作用过程。结果说明壳聚糖介导的银纳米颗粒自发地与HSA结合,而不明显蛋白质的变形变化。此外,纳米颗粒的潜力通过硫蛋白T荧光,圆形二色性,荧光显微镜和透射电子显微镜分析,分析了体外抑制HSA淀粉样纤维状原纤维的形成。实验观察表明,HSA和壳聚糖基银纳米粒子之间的相互作用导致淀粉样蛋白原纤维形成的明显降低。另外,进行细胞毒性和溶血性测定以确保纳米颗粒在施用极限内的生物相容性。

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