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首页> 外文期刊>e-Polymers >Bioactive support for cell cultivation and potential grafting. Part 1: Surface modification of 2-hydroxyethyl methacrylate hydrogels for avidin immobilization
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Bioactive support for cell cultivation and potential grafting. Part 1: Surface modification of 2-hydroxyethyl methacrylate hydrogels for avidin immobilization

机译:为细胞培养和潜在的嫁接提供生物活性支持。第1部分:用于固定抗生物素蛋白的甲基丙烯酸2-羟乙酯水凝胶的表面改性

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摘要

Synthetic hydrogels are often used in biomedical applications as many of them are compatible with living tissue and moreover they can meet most criteria for artificial tissue properties. For applications in tissue engineering modification of polymer surface using some bioactive compounds (e.g. saccharides, proteins) for promoting the process of cell adhesion and proliferation is widely used. In this work, a series of modified hydrogels was prepared by three different methods: by copolymerization of 2-hydroxyethyl methacrylate with methacrylic acid, by hydrolysis and oxidation of poly(2-hydroxyethyl methacrylate) to obtain carboxyl-rich supports. The influence of the reaction conditions of the hydrogel surface treatment on the total carboxylic group content and the swelling degree was studied. The modified hydrogels were characterized by attenuated total reflectance FT-IR spectroscopy and refractive index measurements. Obtained carboxylic groups on the hydrogel surface have allowed the immobilization of avidin in two ways: 1) electrostatically through dissociated carboxylic groups and 2) covalently bonded through activated carboxylic groups by Nhydroxysuccinimide. The capacity of hydrogels for avidin immobilization was determined by Bradford spectrophotometric method. The results so far obtained from the preliminary biological tests showed that immobilized avidin on the hydrogel surface provides better adhesion and proliferation of keratinocytes compared to supports without avidin.
机译:合成水凝胶经常用于生物医学应用,因为它们中的许多与活组织相容,而且它们可以满足人造组织特性的大多数标准。为了在组织工程中的应用,使用一些生物活性化合物(例如糖,蛋白质)来修饰聚合物表面,以促进细胞粘附和增殖过程。在这项工作中,通过三种不同的方法制备了一系列改性水凝胶:甲基丙烯酸2-羟乙酯与甲基丙烯酸的共聚,聚甲基丙烯酸2-羟乙酯的水解和氧化,以获得富含羧基的载体。研究了水凝胶表面处理的反应条件对总羧基含量和溶胀度的影响。改性的水凝胶的特征在于衰减的全反射FT-IR光谱和折射率测量。在水凝胶表面上获得的羧基可以通过两种方式固定抗生物素蛋白:1)通过离解的羧基静电结合; 2)通过活化的羧基被N-羟基琥珀酰亚胺共价键合。通过Bradford分光光度法测定水凝胶固定抗生物素蛋白的能力。到目前为止,从初步生物学测试获得的结果表明,与没有亲和素的载体相比,将亲和素固定在水凝胶表面上可提供更好的角质形成细胞粘附和增殖。

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