pH响应性表面对蛋白质吸附的调控

通过表面引发原子转移自由基聚合在固定了引发剂的硅表面接枝了聚甲基丙烯酸叔丁酯(PtBMA),而后通过水解得到聚甲基丙烯酸(PMAA)聚合物刷.通过X射线光电子能谱、椭圆偏振仪和水接触角测试证明了接枝改性的成功.研究发现PMAA改性表面的浸润性和对蛋白质的吸附行为都具有一定的pH响应性.在较低pH值时改性表面相对疏水,随...     

荧光聚合物研究进展*

本文总结了近年来荧光聚合物的研究进展,主要介绍了荧光聚合物的分类：按其溶解性能可分为非水溶性、水溶性和两亲荧光聚合物三大类;荧光聚合物的合成：荧光化合物为引发剂、荧光化合物为链转移剂、荧光功能单体聚合、荧光化合物与聚合物的化学键合、非荧光功能单体聚合等五种制备荧光聚合物的设计合成方法;荧光聚合物的应用：荧光聚合物在荧光化学传感器、荧光分子温度计、荧光造影、药物载体、荧光探针等方面的应用研究。     

Protein adsorption and cell adhesion on RGD-functionalized silicon substrate surfaces

A method was developed to modify silicon surfaces with good protein resistance and specific cell attachment. A silicon surface was initially deposited using a block copolymer of N-vinylpyrrolidone (NVP) and 2-hydroxyethyl methacrylate (HEMA) (PVP-b-PHEMA) film through surface-initiated atom transfer radical polymerization and then further immobilized using a short arginine-glycine-aspartate (RGD) peptide. Our results demonstrate that the RGD-modified surfaces (Si-RGD) can suppress non-specific adsorption of proteins and induce the adhesion of L929 cells. The Si-RGD surface exhibited higher cell proliferation rates than the unmodified silicon surface. This research established a simple method for the fabrication of dual-functional silicon surface that combines antifouling and cell attachment promotion.     

能够促进细胞黏附的生物活性表面的制备

报道了一种能够促进细胞黏附的生物活性表面的制备方法.首先通过表面引发原子转移自由基聚合方法在硅表面接枝了聚(N-甲基丙烯酰氧基琥珀酰亚胺)(PNMASI)聚合物刷.随着反应时间的增加,接枝层厚度基本呈线性增长,表明聚合反应具有一定的可控性.蛋白质吸附测试表明PNMASI改性后的表面具有高密度固定生物分子的能力.同时,通...     

乙烯基荧光功能单体的合成及与牛血清白蛋白的相互作用

用1-芘基丁酸和L-苯丙氨酸通过酯化、偶合、酰化等反应合成了一种新的乙烯基荧光功能单体N-丙烯酰胺乙基-2-（1-芘基丁酰胺摹）苯丙酰胺（Py-Phe-DA），产率71．2％．经1^H NMR（核磁共振氢谱），MS（质谱）和FT-IR（红外光谱）等证实了它的结构和组成，并对中间体及产物的合成和分离纯化进行了讨论．该单体与牛血清白蛋白反应的荧光光谱结果表明它们之间可发生相互作用．     

Poly(N-vinylpyrrolidone)-modified surfaces repel plasma protein adsorption

The present work aimed to study the interaction between plasma proteins and PVP-modified surfaces under more complex protein conditions.In the competitive adsorption of fibrinogen(Fg) and human serum albumin(HSA),the modified surfaces showed preferential adsorption of HSA.In 100%plasma,the amount of Fg adsorbed onto PVP-modified surfaces was as low as 10 ng/cm~2,suggesting the excellent protein resistance properties of the modified surfaces.In addition, immunoblots of proteins eluted from the modified surfaces after plasma contact confirmed that PVP-modified surfaces can repel most plasma proteins,especially proteins that play important roles in the process of blood coagulation.