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Nanostructured Porous Silicon-Solid Lipid Nanocomposite:Towards Enhanced Cytocompatibility and Stability, Reduced Cellular Association, and Prolonged Drug Release

机译:纳米结构的多孔硅固脂质纳米复合材料:增强细胞相容性和稳定性,减少细胞缔合,延长药物释放

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摘要

A major bottleneck in nanometer-scale drug delivery systems is the fabrication of nanocarriers with excellent stability under physiological conditions that can both efficiently encapsulate therapeutic agents and controllably release their payloads. Herein, the formation of a novel nanocomposite based on the encapsulation of thermally hydrocarbonized porous silicon (THCPSi) nanoparticles with solid lipid nanoparticles (SLNs) on a 1:1 ratio is described. The THCPSi-SL nanocomposites (THCPSi-SLNCs) are formed using a solid-in-oil-in-water emulsion solvent evaporation method. TEM and FTIR analyses prove that THCPSi nanoparticles are successfully encapsulated in the SLN matrix. The formation of the THCPSi-SLNCs alters the surface smoothness and hydrophobicity of the THCPSi nanoparticles, and also remarkably enhances their stability in human plasma. After encapsulation, the cytocompatibility of the THCPSi nanoparticles with intestinal, liver, and macrophage cancer cells is also greatly improved. A prolonged release of the model drug, furosemide, from THCPSi-SLNC is achieved, indicating that the SLN matrix successfully seals the pores of the THCPSi nanoparticles. Flow cytometry and confocal fluorescence microscopy studies demonstrates the significantly reduced cellular association of THCPSi-SLNCs with the cells comparing to bare THCPSi nanoparticles. Overall, the THCPSi-SLNCs exhibits superior suspensibility and better stability against aggregation in aqueous buffer solutions, increases the particle surface smoothness and cytocompatibility, reduces the cellular association, increases the in vitro stability in human plasma, and prolonges the drug release. These results suggest that the nanocomposite is a promising nanovector system for drug delivery applications.
机译:纳米级药物递送系统的主要瓶颈是在生理条件下具有出色稳定性的纳米载体的制备,该载体既可以有效地封装治疗剂,又可以可控地释放其有效载荷。本文中,描述了基于热烃化多孔硅(THCPSi)纳米颗粒与固体脂质纳米颗粒(SLNs)1:1比例封装的新型纳米复合材料的形成。 THCPSi-SL纳米复合材料(THCPSi-SLNCs)使用水包油中的固体乳液溶剂蒸发法形成。 TEM和FTIR分析证明THCPSi纳米颗粒已成功封装在SLN基质中。 THCPSi-SLNCs的形成改变了THCPSi纳米粒子的表面光滑度和疏水性,并显着增强了它们在人体血浆中的稳定性。包封后,THCPSi纳米颗粒与肠癌细胞,肝细胞和巨噬细胞癌细胞的细胞相容性也大大提高。实现了THCPSi-SLNC模型药物呋塞米的长时间释放,这表明SLN基质成功地密封了THCPSi纳米颗粒的孔。流式细胞术和共聚焦荧光显微镜研究表明,与裸露的THCPSi纳米粒子相比,THCPSi-SLNCs与细胞的细胞缔合显着减少。总的来说,THCPSi-SLNCs在水性缓冲溶液中表现出优异的悬浮性和更好的稳定性,可提高颗粒表面的光滑度和细胞相容性,减少细胞缔合,提高人血浆中的体外稳定性,并延长药物释放时间。这些结果表明,纳米复合材料是用于药物递送应用的有前途的纳米载体系统。

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  • 来源
    《Advanced Functional Materials》 |2013年第15期|1893-1902|共10页
  • 作者单位

    Division of Pharmaceutical Technology Faculty of Pharmacy University of Helsinki FI-00014, Helsinki, Finland;

    Laboratory of Industrial Physics Department of Physics University of Turku, FI-20014, Turku, Finland;

    Division of Pharmaceutical Technology Faculty of Pharmacy University of Helsinki FI-00014, Helsinki, Finland;

    Division of Pharmaceutical Technology Faculty of Pharmacy University of Helsinki FI-00014, Helsinki, Finland;

    Laboratory of Industrial Physics Department of Physics University of Turku, FI-20014, Turku, Finland;

    Division of Pharmaceutical Technology Faculty of Pharmacy University of Helsinki FI-00014, Helsinki, Finland;

    Laboratory of Industrial Physics Department of Physics University of Turku, FI-20014, Turku, Finland;

    Division of Pharmaceutical Technology Faculty of Pharmacy University of Helsinki FI-00014, Helsinki, Finland;

    Division of Pharmaceutical Technology Faculty of Pharmacy University of Helsinki FI-00014, Helsinki, Finland;

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