Asymmetrical flow field-flow fractionation for human serum albumin based nanoparticle characterisation and a deeper insight into particle formation processes.

Asymmetrical flow field-flow fractionation for human serum albumin based nanoparticle characterisation and a deeper insight into particle formation processes.
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基于人血清白蛋白的纳米颗粒表征的不对称流场流分级分离以及对颗粒形成过程的更深入了解

DOI:
10.1016/j.chroma.2014.04.048
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发表时间:
2014
期刊:
Journal of chromatography. A
影响因子:
--
通讯作者:
Langer
Langer
中科院分区:
--
文献类型:
--
作者:
Langer

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纳米粒子作为药物传递系统在制药领域越来越受到关注。了解纳米系统在人体中的行为和影响取决于系统的全面表征,特别是在尺寸和尺寸分布方面。不对称流场流分级分离(AF4)是一种很有前途的方法,这一挑战,因为这种技术使色谱分离的颗粒和溶质分子,根据其各自的size.Within这项研究AF4用于表征人血清白蛋白(HSA)为基础的纳米粒子。在第一部分中,方法开发的最重要的方面,如交叉流率的选择,聚焦和通过出口分流对样品分离的样品浓度的增加进行了评估。通过动态光散射检测器(DLS,Zetasizer)的在线耦合来控制样品分级,并通过DLS分批模式测量来确认。在第二部分中,通过去溶剂化方法对场流分级用于表征HSA颗粒形成过程的适用性进行了评估。观察到依赖于时间的颗粒形成,其由去溶剂化剂的量控制。此外,结合在线动态光散射的场流分级用于监测所得HSA纳米颗粒的PEG化过程中粒径的增加。从溶解的聚乙二醇(PEG)中分离纳米颗粒可以成功地用于测定颗粒的PEG化程度。
Nanoparticles used as drug delivery systems are of growing interest in the pharmaceutical field. Understanding the behaviour and effects of nanosystems in the human body is dependent on comprehensive characterisation of the systems especially with regard to size and size distribution. Asymmetrical flow field-flow fractionation (AF4) is a promising method for this challenge as this technique enables chromatographic separation of particles and solute molecules according to their respective size.Within this study AF4 was used for the characterisation of human serum albumin (HSA) based nanoparticles. In a first part, the most important aspects of method development like the choice of cross flow rate, focusing and the increase of sample concentration via outlet stream splitting on the sample separation were evaluated. Sample fractionation was controlled by inline-coupling of a dynamic light scattering detector (DLS, Zetasizer) and was confirmed by DLS batch mode measurements. In a second part the applicability of field-flow fractionation for characterisation of the HSA particle formation process by a desolvation method was evaluated. A time dependent particle formation was observed which was controlled by the amount of desolvating agent. Furthermore, field-flow fractionation in combination with in-line dynamic light scattering was used to monitor the increase of particle diameter during PEGylation of the resulting HSA nanoparticles. The separation of nanoparticles from dissolved polyethylene glycol (PEG) could successfully be used for determination of the particles’ PEGylation degree.
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