alexa Real-time electrochemical monitoring of isothermal helicase-dependent amplification of nucleic acids.
General Science

General Science

Research & Reviews: Journal of Botanical Sciences

Author(s): Kivlehan F, Mavr F, Talini L, Limoges B, Marchal D, Kivlehan F, Mavr F, Talini L, Limoges B, Marchal D, Kivlehan F, Mavr F, Talini L, Limoges B, Marchal D, Kivlehan F, Mavr F, Talini L, Limoges B, Marchal D

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Abstract We described an electrochemical method to monitor in real-time the isothermal helicase-dependent amplification of nucleic acids. The principle of detection is simple and well-adapted to the development of portable, easy-to-use and inexpensive nucleic acids detection technologies. It consists of monitoring a decrease in the electrochemical current response of a reporter DNA intercalating redox probe during the isothermal DNA amplification. The method offers the possibility to quantitatively analyze target nucleic acids in less than one hour at a single constant temperature, and to perform at the end of the isothermal amplification a DNA melt curve analysis for differentiating between specific and non-specific amplifications. To illustrate the potentialities of this approach for the development of a simple, robust and low-cost instrument with high throughput capability, the method was validated with an electrochemical system capable of monitoring up to 48 real-time isothermal HDA reactions simultaneously in a disposable microplate consisting of 48-electrochemical microwells. Results obtained with this approach are comparable to that obtained with a well-established but more sophisticated and expensive fluorescence-based method. This makes for a promising alternative detection method not only for real-time isothermal helicase-dependent amplification of nucleic acid, but also for other isothermal DNA amplification strategies. This article was published in Analyst and referenced in Research & Reviews: Journal of Botanical Sciences

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