电驱动与阳离子交换膜在脱氧核糖核酸捕获浓缩中的应用

基于电驱动特性与离子交换膜的选择透过性,构建了新型、无损伤的脱氧核糖核酸(DNA)捕获浓缩装置。以λ-DNA为模型化合物,探究其在自组装装置中的富集特性,优化了实验条件,对浓缩液进行凝胶电泳实验以考察DNA是否变性,并进行聚合酶链反应,以证明本方法回收的DNA可供进一步的生物分析。结果表明:本装置在低电压条件下能够无损伤地捕获DNA,浓缩液可用于进一步的生物分析,DNA的富集倍数达62倍,回收率达46%。本方法操作简便,避免使用大量有机试剂,微型化可与生物芯片联用,在DNA萃取、纯化与浓缩领域有较大的应用空间。

Application of Electrical Driven and Cationic Exchange Membrane to Capture and Enrich Deoxyribonucleic Acid

Based on the selective permeability of cationic exchange membrane and the characteristic of electri cal driven, a new and non-damage apparatus that can be used to separate compounds with different electric property was built to capture and enrich DNA.λ-DNA, as a model compound, was used to study the charac teristic of capturing and enriching DNA in this device.Factors that might affect the efficiency such as voltage and flow speed were optimized and gel electrophoresis was done to study if DNA was denaturation, PCR was done to prove the concentration can be used to further bioanalysis.Results were got; the apparatus could used to capture and enrich DNA scathelessly under the condition of low-voltage, the concentrate multiple was 62, and the recovery efficiency was accessible to 47%, concentration can be used for the next bioanalysis.Auto matic, easy to handle and little organic reagent using made it be advantageous, it could be miniatured to com bine with other biochips.This method had a large application space in field of DNA extraction, purification and concentration.