文章基本信息

标题：Quantitative determination of target gene with electrical sensor
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作者：Xuzhi Zhang ; Qiufen Li ; Xianshi Jin 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
DOI：10.1038/srep12539
出版社：Springer Nature
摘要：Integrating loop-mediated isothermal amplification (LAMP) with capacitively coupled contactless conductivity detection (C⁴D), we have developed an electrical sensor for the simultaneous amplification and detection of specific sequence DNA. Using the O26- wzy gene as a model, the amount of initial target gene could be determined via the threshold time obtained by monitoring the progression of the LAMP reaction in real time. Using the optimal conditions, a detection limit of 12.5 copy/μL can be obtained within 30 min. Monitoring the LAMP reaction by C⁴D has not only all the advantages that existing electrochemical methods have, but also additional attractive features including being completely free of carryover contamination risk, high simplicity and extremely low cost. These benefits all arise from the fact that the electrodes are separated from the reaction solution, that is C⁴D is a contactless method. Hence in proof of principle, the new strategy promises a robust, simple, cost-effective and sensitive method for quantitative determination of a target gene, that is applicable either to specialized labs or at point-of-care.