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Rapid extraction and preservation of genomic DNA from human samples

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Abstract

Simple and rapid extraction of human genomic DNA remains a bottleneck for genome analysis and disease diagnosis. Current methods using microfilters require cumbersome, multiple handling steps in part because salt conditions must be controlled for attraction and elution of DNA in porous silica. We report a novel extraction method of human genomic DNA from buccal swab and saliva samples. DNA is attracted onto a gold-coated microchip by an electric field and capillary action while the captured DNA is eluted by thermal heating at 70 °C. A prototype device was designed to handle four microchips, and a compatible protocol was developed. The extracted DNA using microchips was characterized by qPCR for different sample volumes, using different lengths of PCR amplicon, and nuclear and mitochondrial genes. In comparison with a commercial kit, an equivalent yield of DNA extraction was achieved with fewer steps. Room-temperature preservation for 1 month was demonstrated for captured DNA, facilitating straightforward collection, delivery, and handling of genomic DNA in an environment-friendly protocol.

Portable microtip device for human genomic DNA extraction

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Acknowledgments

We would like to acknowledge Ms. Sijie Sun, Department of Bioengineering at the University of Washington, for help with gel electrophoresis. We would like to acknowledge Dr. Xia You and Dr. John Stamatoyannopoulos at the Department of Genome Sciences at University of Washington for providing K562 cells. We acknowledge the support of NSF STTR II award (0956876), NSF Career Award (ECCS-0846454), and NIH SBIR (NIH/NIGMS 1R43GM099347).

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Washington, Seattle, WA, 98195, USA

    D. Kalyanasundaram, J.-H. Kim, W.-H. Yeo, D. Gao & J.-H. Chung

  2. NanoFacture, Inc., P.O. Box 52651, Bellevue, WA, 98015, USA

    K. Oh & K.-H. Lee

  3. KNR Systems, Inc., Yongin-si, Gyeonggi-do, 449-881, Republic of Korea

    M.-H. Kim & S.-M. Ryew

  4. Department of Industrial Design, University of Washington, Seattle, WA, 98195, USA

    S.-G. Ahn

  5. Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA, 98195, USA

    G. A. Cangelosi

Authors
  1. D. Kalyanasundaram
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  2. J.-H. Kim
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  3. W.-H. Yeo
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  4. K. Oh
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  5. K.-H. Lee
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  6. M.-H. Kim
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  7. S.-M. Ryew
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  8. S.-G. Ahn
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  9. D. Gao
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  10. G. A. Cangelosi
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  11. J.-H. Chung
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Corresponding authors

Correspondence to K.-H. Lee or J.-H. Chung.

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Kalyanasundaram, D., Kim, JH., Yeo, WH. et al. Rapid extraction and preservation of genomic DNA from human samples. Anal Bioanal Chem 405, 1977–1983 (2013). https://doi.org/10.1007/s00216-012-6637-8

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  • DOI: https://doi.org/10.1007/s00216-012-6637-8

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