Rapid microfluidic solid-phase extraction system for hyper-methylated DNA enrichment and epigenetic analysis

Arpita De, Wouter Sparreboom, Albert van den Berg, Edwin Carlen

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    13 Citations (Scopus)
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    Genetic sequence and hyper-methylation profile information from the promoter regions of tumor suppressor genes are important for cancer disease investigation. Since hyper-methylated DNA (hm-DNA) is typically present in ultra-low concentrations in biological samples, such as stool, urine, and saliva, sample enrichment and amplification is typically required before detection. We present a rapid microfluidic solid phase extraction (mu SPE) system for the capture and elution of low concentrations of hm-DNA (<= 1 ng ml(-1)), based on a protein-DNA capture surface, into small volumes using a passive microfluidic lab-on-a-chip platform. All assay steps have been qualitatively characterized using a real-time surface plasmon resonance (SPR) biosensor, and quantitatively characterized using fluorescence spectroscopy. The hm-DNA capture/elution process requires less than 5 min with an efficiency of 71% using a 25 mu l elution volume and 92% efficiency using a 100 mu l elution volume. (C) 2014 AIP Publishing LLC.
    Original languageUndefined
    Pages (from-to)054119
    Number of pages11
    Issue number5
    Publication statusPublished - Sep 2014


    • EWI-25471
    • IR-93312
    • METIS-309756

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