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在纳米粒子表面上对松素和松素的竞争

Mahdi Tavakol¹, Mohammad Javad Hajipour², Maryam Ferdousi³

¹Biomedical Engineering and Biomechanics Research Centre, School of Engineering, College of Science and Engineering, University of Galway, Galway, Ireland.

|October 20, 2023

概括

了解纳米粒子蛋白相互作用是药物输送的关键. 人类血清白蛋白 (HSA) 可以通过在纳米粒子表面上取代免疫球蛋白G (IgG) 来延长纳米粒子循环时间.

科学领域:

生物医学工程生物医学工程
纳米技术纳米技术
材料科学材料科学材料科学

背景情况:

在体内纳米粒子的行为取决于血液循环的保持.
蛋白冠状体由像松素和松素这样的吸附蛋白质形成,决定了循环时间.
蛋白质冠状形成是一个动态的竞争性吸附过程,对纳米粒子命运至关重要.

研究的目的:

在纳米粒子表面研究免疫球蛋白G (IgG) 和人血清白蛋白 (HSA) 之间的竞争性吸附动态.
了解蛋白质吸附的顺序如何影响最终的蛋白质冠状结构和稳定性.
探索阿尔伯明在延长纳米粒子血液循环时间方面的潜力.

主要方法:

利用分子动力学模拟来对纳米粒子表面的蛋白质吸附进行建模.
在不同的顺序吸附场景下分析了IgG和HSA的吸附概率和方向.
量化了吸附蛋白质的横向扩散,以评估系统稳定性.

主要成果:

在IgG吸附后,在石墨烯氧化物 (GO) 上的HSA吸附比相反的顺序更有利.
与IgG相比,HSA的较高横向扩散促进了更稳定的蛋白质冠状结构.
最初的HSA吸附限制了IgG的横向扩散,这表明一个不太可逆的过程.
HSA可以在GO表面取代吸附的IgG,但HSA的IgG取代不太可能.

结论:

专素 (HSA) 吸附比GO上的IgG吸附更有利,并且可能更稳定.
HSA可能会将IgG从纳米粒子表面取代,从而可能延长血液循环时间.
了解这些竞争性吸附机制对于设计具有增强体内性能的纳米粒子至关重要.

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