Issue 17, 2024

ElectrochemCap: an integrated detection for loop-mediated isothermal amplification reactions

Abstract

Loop-mediated isothermal amplification (LAMP) of genetic materials has emerged as a powerful molecular biology technique with great potential to be a standard point-of-care (POC) technique. This method has found several applications, but it still presents challenges for its direct on-site application, particularly in terms of integrated reaction and detection systems and the risk of carryover contamination. In this work, we propose an innovative solution – an electrochemical microcentrifuge tube cap (ElectrochemCap) based on a screen-printed electrode, a 3D printed adapter and an adhesive layer – which integrates the amplification reaction and its subsequent electrochemical detection in a single device. The design, fabrication, and electrochemical characterization of the ElectrochemCap are reported here, demonstrating its suitability for LAMP detection. Rapidly emerging technologies, such as 3D printing or xurography, are the basis of a prototype that has been validated for the detection of SARS-CoV-2 using reverse transcription LAMP (RT-LAMP), achieving results comparable to those obtained by gold-standard RT-qPCR. Moreover, we have explored the versatility of the ElectrochemCap presenting several additional designs (for containers with different volumes, shapes and materials, as well as multiplexed approaches), expanding its potential applications. Overall, the ElectrochemCap represents an affordable, versatile, and marketable innovation for integrated quantitative electrochemical detection, with enormous possibilities in bioelectroanalytical procedures and portable laboratory setups.

Graphical abstract: ElectrochemCap: an integrated detection for loop-mediated isothermal amplification reactions

Supplementary files

Article information

Article type
Paper
Submitted
05 May 2024
Accepted
05 Jul 2024
First published
18 Jul 2024
This article is Open Access
Creative Commons BY-NC license

Lab Chip, 2024,24, 4085-4095

ElectrochemCap: an integrated detection for loop-mediated isothermal amplification reactions

P. Rioboó-Legaspi, E. Costa-Rama and M. T. Fernández-Abedul, Lab Chip, 2024, 24, 4085 DOI: 10.1039/D4LC00395K

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