Adsorption of Fibronectin, Fibrinogen, and Albumin on TiO2: Time-Resolved Kinetics, Structural Changes, and Competition Study

Adsorption of Fibronectin, Fibrinogen, and Albumin on TiO2: Time-Resolved Kinetics, Structural Changes, and Competition Study
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纤连蛋白、纤维蛋白原和白蛋白在 TiO2 上的吸附:时间分辨动力学、结构变化和竞争研究

DOI:
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发表时间:
2012
期刊:
影响因子:
2.1
通讯作者:
C. Aparicio
C. Aparicio
中科院分区:
工程技术4区
文献类型:
--
作者:
M. Pegueroles;C. Tonda;J. Planell;F. Gil;C. Aparicio

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蛋白质吸附过程的理解是设计生物材料表面的关键。在这项工作中,使用具有耗散监测的石英晶体微天平,我们研究了以下内容:(a)与金属植入物整合相关的三种广泛描述的蛋白质在TiO 2表面上的吸附动力学[即,白蛋白(BSA)、纤维蛋白原(Fbg)和纤连蛋白(Fn)];和(B)在两步实验中这些蛋白质对吸附在TiO 2上的竞争,所述两步实验包括将表面依次暴露于不同的单蛋白溶液。每种蛋白质表现出不同的吸附过程和使用Voigt模型计算的adlayer的属性。竞争实验表明,当BSA作为第二种蛋白质引入体系时,BSA取代了Fn和Fbg等大分子蛋白质,而当BSA作为第二种蛋白质引入体系时,大分子蛋白质位于BSA之上,形成吸附蛋白质双层。
An understanding of protein adsorption process is crucial for designing biomaterial surfaces. In this work, with the use of a quartz-crystal microbalance with dissipation monitoring, we researched the following: (a) the kinetics of adsorption on TiO2 surfaces of three extensively described proteins that are relevant for metallic implant integration [i.e., albumin (BSA), fibrinogen (Fbg), and fibronectin (Fn)]; and (b) the competition of those proteins for adsorbing on TiO2 in a two-step experiment consisted of sequentially exposing the surfaces to different monoprotein solutions. Each protein showed a different process of adsorption and properties of the adlayer—calculated using the Voigt model. The competition experiments showed that BSA displaced larger proteins such as Fn and Fbg when BSA was introduced as the second protein in the system, whereas the larger proteins laid on top of BSA forming an adsorbed protein bi-layer when those were introduced secondly in the system.
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