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Solid phase nucleic acid extraction technique in a microfluidic chip using a novel non-chaotropic agent: dimethyl adipimidate


Shin, Y and Perera, AP and Wong, CC and Park, MK, Solid phase nucleic acid extraction technique in a microfluidic chip using a novel non-chaotropic agent: dimethyl adipimidate, Lab on A Chip, 14 pp. 359-368. ISSN 1473-0197 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 The Royal Society of Chemistry

DOI: doi:10.1039/c3lc51035b


Here, we present a silicon microfluidic system for the purification and extraction of nucleic acids from human body fluid samples utilizing a dimethyl adipimidate (DMA)-based solid-phase extraction method. We propose DMA, which has been used as an amino-reactive cross-linking agent within cells and proteins, as a non-chaotropic reagent for the capture of nucleic acids to overcome the limitations of existing chaotropic and non-chaotropic techniques such as low binding efficiency, PCR inhibition and so on. DMA contains bi-functional imidoesters that form reversible cross-linking structures with DNA therefore providing a high surface-area to volume ratio for capturing DNA without structurally modifying microfluidic channels. In this work, we have first demonstrated highly efficient capture and purification of genomic DNA (T24 cell line) with DMA using a label-free silicon microring resonator sensor device. In addition, we observed the improvement of the DNA amplification efficiency by using the proposed technique for both the genetic (HRAS) and epigenetic (RARβ) analysis of DNA biomarkers. Particularly, we confirmed that the DMA-based solid-phase extraction technique can be applied for the extraction of genomic DNA with higher purity (p < 0.001) using human body fluids (blood and urine) in silicon microfluidic devices compared to other chaotropic methods. Therefore, the proposed technique would be able to harmonize with a micro-total analysis system platform for the analysis of genetic and epigenetic DNA biomarkers related to human diseases in the field of point-of-care (POC) diagnostic applications.

Item Details

Item Type:Refereed Article
Keywords:dimethyl adipimidate, microfluidic chip
Research Division:Biomedical and Clinical Sciences
Research Group:Clinical sciences
Research Field:Medical genetics (excl. cancer genetics)
Objective Division:Health
Objective Group:Clinical health
Objective Field:Clinical health not elsewhere classified
UTAS Author:Perera, AP (Mrs Agampodi Perera)
ID Code:120566
Year Published:2014
Web of Science® Times Cited:24
Deposited By:Ecology and Biodiversity
Deposited On:2017-08-29
Last Modified:2017-10-23

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