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Toward a microchip-based solid-phase extraction method for isolation of nucleic acids
Wolfe, KA and Breadmore, MC and Ferrance, JP and Power, ME and Conroy, JF and Norris, PM and Landers, JP (2002) Toward a microchip-based solid-phase extraction method for isolation of nucleic acids. Electrophoresis, 23 (5). pp. 727-733. ISSN 0173-0835
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A silica-based solid-phase extraction system suitable for incorporation into a microchip platform (micro-total analytical system; micro-TAS) would find utility in a variety of genetic analysis protocols, including DNA sequencing. The extraction procedure utilized is based on adsorption of the DNA onto bare silica. The procedure involves three steps: (i) DNA adsorption in the presence of a chaotropic salt, (ii) removal of contaminants with an alcohol/water solution, and (iii) elution of the adsorbed DNA in a small volume of buffer suitable for polymerase chain reaction (PCR) amplification. Multiple approaches for incorporation of this protocol into a microchip were examined with regard to extraction efficiency, reproducibility, stability, and the potential to provide PCR-amplifiable DNA. These included packing microchannels with silica beads only, generating a continuous silica network via sol-gel chemistry, and combinations of these. The optimal approach was found to involve immobilizing silica beads packed into the channel using a sol-gel network. This method allowed for successful extraction and elution of nanogram quantities of DNA in less than 25 min, with the DNA obtained in the elution buffer fraction. Evaluation of the eluted DNA indicated that it was of suitable quality for subsequent amplification by PCR.
|Keywords:||DNA purification; Microchip; Nucleic acids; Solid-phase extraction|
|Journal or Publication Title:||Electrophoresis|
|Page Range:||pp. 727-733|
|Identification Number - DOI:||10.1002/1522-2683(200203)23:5<727::AID-ELPS727>3.0.CO;2-O|
Copyright 2002 John Wiley & Sons.
|Date Deposited:||03 Jun 2008 12:32|
|Last Modified:||18 Nov 2014 03:42|
|Item Statistics:||View statistics for this item|
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