Functionalized periodic mesoporous organosilicas for selective adsorption of proteins

Functionalized periodic mesoporous organosilicas for selective adsorption of proteins
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用于蛋白质选择性吸附的功能化周期性介孔有机硅

DOI:
10.1016/j.apsusc.2012.04.011
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发表时间:
2012-07
影响因子:
6.7
通讯作者:
Haixia Zhang
Haixia Zhang
中科院分区:
材料科学1区
文献类型:
--
作者:
Ling Zhu;Xiaoyan Liu;Tong Chen;Zhigang Xu;Wenfu Yan;Haixia Zhang

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合成了具有有机桥接(CH2)结构的周期性介孔有机硅(PMO),并在合成后用氨基或羧基进行了官能团化。通过改变PMO的亲疏水性和净电荷,可以选择性地吸附和纯化具有不同形状和不同等电点(pI)的蛋白质。实验结果表明,牛血清白蛋白(BSA)在PMO材料上的吸附速度快于血红蛋白(Hb),而溶菌酶(Lys)完全不能在PMO材料上吸附。氨基修饰的PMO (PMO-(NH2)2)对BSA的吸附量为44.67mg/g,羧基修饰的PMO (PMO-(COOH)2)对Hb的吸附量为300.0mg/g。蛋白质混合物中不同组分之间的相互作用对蛋白质的吸附行为有很大影响。此外,还发现(PMO-(NH2)2对蛋白质的吸附速率比PMO-(COOH)2慢得多。
The periodic mesoporous organosilicas (PMO) with an organobridged (CH2) was synthesized and functionalized with amino or carboxylic groups by post-synthesis methods. The functionalized PMO by changing the hydrophilic/hydrophobic property and the net charge could be used to selectively adsorb and purify proteins with different shapes and different isoelectric points (pI). The experimental result showed that Bovine serum albumin (BSA) was adsorbed quicker than hemoglobin (Hb) on the materials, and lysozyme (Lys) could not be adsorbed on these PMO materials at all. The adsorption capacity of amino groups modified PMO (PMO-(NH2)2) for BSA was 44.67mg/g and 300.0mg/gfor Hb on carboxylic groups modified PMO (PMO-(COOH)2). The adsorption behavior of proteins was affected strongly by the interaction among different constituents in the mixture of proteins. In addition, it is found that the adsorption rate of (PMO-(NH2)2for adsorption of proteins was much slower than PMO-(COOH)2.
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