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Issue 8, 2011
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A lab-on-a-chip device for rapid identification of avian influenza viral RNA by solid-phase PCR

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Abstract

The endemic of Avian Influenza Virus (AIV) in Asia and epizootics in some European regions have caused serious economic losses. Multiplex reverse-transcriptase (RT) PCR has been developed to detect and subtype AIV. However, the number of targets that can be amplified in a single run is limited because of uncontrollable primer–primer interferences. In this paper, we describe a lab-on-a-chip device for fast AIV screening by integrating DNA microarray-based solid-phase PCR on a microfluidic chip. A simple UV cross-linking method was used to immobilize the DNA probes on unmodified glass surface, which makes it convenient to integrate microarray with microfluidics. This solid-phase RT-PCR method combined RT amplification of extracted RNA in the liquid phase and species-specific nested PCR on the solid phase. Using the developed approach, AIV viruses and their subtypes were unambiguously identified by the distinct patterns of amplification products. The whole process was reduced to less than 1 hour and the sample volume used in the microfluidic chip was at least 10 times less than in the literature. By spatially separating the primers, highly multiplexed amplification can be performed in solid-phase PCR. Moreover, multiplex PCR and sequence detection were done in one step, which greatly simplified the assay and reduced the processing time. Furthermore, by incorporating the microarray into a microchamber-based PCR chip, the sample and the reagent consumption were greatly reduced, and the problems of bubble formation and solution evaporation were effectively prevented. This microarray-based PCR microchip can be widely employed for virus detection and effective surveillance in wild avian and in poultry productions.

Graphical abstract: A lab-on-a-chip device for rapid identification of avian influenza viral RNA by solid-phase PCR

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Supplementary files

Article information


Submitted
21 Oct 2010
Accepted
07 Feb 2011
First published
02 Mar 2011

Lab Chip, 2011,11, 1457-1463
Article type
Paper

A lab-on-a-chip device for rapid identification of avian influenza viral RNA by solid-phase PCR

Y. Sun, R. Dhumpa, D. D. Bang, J. Høgberg, K. Handberg and A. Wolff, Lab Chip, 2011, 11, 1457
DOI: 10.1039/C0LC00528B

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