Detection of LAMP Products Using CNT Array Electrode

文献类型： 外文期刊

第一作者： Zhang, Xuzhi

作者： Zhang, Xuzhi;Li, Qiufen;Chen, Bijiuan;Ma, Shaosai;Cui, Yi

作者机构：

关键词： DNA analysis;Loop-mediated isothermal amplification (LAMP);CNT array electrode;malB gene

期刊名称：JOURNAL OF THE CHINESE CHEMICAL SOCIETY （ 影响因子：1.967； 五年影响因子：1.639 ）

ISSN： 0009-4536

年卷期： 2011 年 58 卷 5 期

页码：

收录情况： SCI

摘要： We described here a novel strategy for discriminating target gene by integrating loop-mediated isothermal amplification (LAMP) and differential pulse voltammetry (DPV). After a successful LAMP reaction, the anodic peak current (i(pa)) of the free 2'-deoxyguanosine 5'-triphosphate (dGTP) decreased remarkably at a carbon nanotubes array working electrode, owing to the consumption of free dGTP as one of reactive substrates. Thus, the change of current response was used to characterize the result of LAMP reaction. And hence the presence of the target gene in template DNA could be discriminated easily. The malB gene extracted from Escherichia colt cells was tested as a model. After the reaction for 30 min, the LAMP mix was scanned directly. Then the information of the target gene in 0.8 picogram template DNA was obtained accurately. The result was in good accordance with that obtained with optical-based methods (gel electrophoresis and fluorescent dye). The new strategy has the advantages of being very simple to perform, rapid response, elimination of post-amplification processing, avoidance of auxiliary reagents and low cost (there was almost no cost for the detection step). Therefore, it was quite promising for use in miniaturized devices and in the development of point-of-care applications.

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