title: Quantitative determination of target gene with electrical sensor.
abstract: Integrating loop-mediated isothermal amplification (LAMP) with capacitively coupled contactless conductivity detection (C(4)D), 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 C(4)D 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 C(4)D 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.
authors.affiliation: 1] School of Chemistry and Australian Centre for NanoMedicine, The University of New South Wales, Sydney, NSW 2052, Australia [2] Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao 266071, P.R. China.
authors.forename: Xuzhi
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao 266071, P.R. China.
authors.forename: Qiufen
authors.initials: Q
authors.lastname: Li
authors.affiliation: Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Key Laboratory of Sustainable Development of Marine Fisheries, Ministry of Agriculture, Qingdao 266071, P.R. China.
authors.forename: Xianshi
authors.initials: X
authors.lastname: Jin
authors.affiliation: School of Chemistry and Australian Centre for NanoMedicine, The University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Cheng
authors.initials: C
authors.lastname: Jiang
authors.affiliation: School of Chemistry and Australian Centre for NanoMedicine, The University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Yong
authors.initials: Y
authors.lastname: Lu
authors.affiliation: School of Chemistry and Australian Centre for NanoMedicine, The University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: Roya
authors.initials: R
authors.lastname: Tavallaie
authors.affiliation: School of Chemistry and Australian Centre for NanoMedicine, The University of New South Wales, Sydney, NSW 2052, Australia.
authors.forename: J Justin
authors.initials: JJ
authors.lastname: Gooding
mesh_terms: D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D021141:Nucleic Acid Amplification Techniques / Q000379:methods*; D019095:Point-of-Care Systems