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涂层配体的物理化学性质在纳米颗粒受体介导内吞中的作用。

Role of physicochemical properties of coating ligands in receptor-mediated endocytosis of nanoparticles.

机构信息

National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China.

出版信息

Biomaterials. 2012 Aug;33(23):5798-802. doi: 10.1016/j.biomaterials.2012.04.055. Epub 2012 May 16.

Abstract

A fundamental understanding of the receptor-mediated endocytosis is of great importance in biomedicine. In this paper, we systematically investigate the effect of the properties of coating ligands on the cellular uptake of nanoparticles by using dissipative particle dynamics, and find that the strength of the receptor-ligand interaction, the ligand density and length as well as its rigidity can strongly affect the final equilibrium in the receptor-mediated endocytosis. Interestingly, it is found that the particle decorated with longer ligands is more likely to attach to the membrane, while it is harder to be totally engulfed. Increasing the ligand density and rigidity which enhances the uniform distribution of ligands on the particle may lead to the total engulfment. Further, we also show that the particle can be totally engulfed if one can reasonably design the hydrophobic/lipophobic properties of ligands. The present study shows that not only the chemical but also the physical parameters of ligands can govern the nanoparticle-cell interaction, which may give some significant insights into future nanoparticle design in drug delivery.

摘要

对受体介导的内吞作用有一个基本的了解在生物医药中非常重要。在本文中,我们使用耗散粒子动力学系统地研究了涂层配体性质对纳米粒子细胞摄取的影响,发现受体-配体相互作用的强度、配体密度和长度以及其刚性可以强烈影响受体介导的内吞作用的最终平衡。有趣的是,我们发现用较长配体修饰的粒子更有可能附着在膜上,而完全被吞噬则更难。增加配体密度和刚性,可增强配体在粒子上的均匀分布,从而导致完全吞噬。此外,我们还表明,如果可以合理设计配体的疏水/疏脂性质,则可以完全吞噬粒子。本研究表明,不仅化学参数,而且配体的物理参数也可以控制纳米粒子-细胞相互作用,这可能为未来药物输送中的纳米粒子设计提供一些重要的见解。

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