Abstract
DNA analysis is used for a variety of purposes, including disease diagnosis and DNA profiling; this involves extracting DNA from living organisms. In this study, we prepared polycationic silica particles to extract DNA that has the negatively charged phosphate backbone from solution. The coated particles were prepared by mixing conventional silica gel particles and poly-Lys; these particles could efficiently extract 1.3 μg of cell-free DNA from 50 mL of (male) urine. It is expected that these easily prepared particles (just a mixture of two commercially available chemicals) can be used as a noninvasive diagnostic tool for genetic disorders such as cancer, diabetes, and hypertension.
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Acknowledgements
We acknowledge Profs. T. Hashimoto and S. Ehata (University of Tokyo) for their kind advice on DNA analysis. P.R. expresses thanks for the support from the EPFL-U. Tokyo Scientific and Educational Exchange Program. This work was supported by grants (Kakenhi) from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan and JSPS Core-to-Core Program, A. Advanced Research Networks.
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All clinical studies involving human urine samples were conducted in adherence to the procedure approved by the Human Ethics Committee of the School of Pharmaceutical Sciences in University of Tokyo, and informed consent was received from the volunteers.
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The authors declare that they have no conflicts of interest.
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Takano, S., Hu, Q., Amamoto, T. et al. Extraction of cell-free DNA from urine, using polylysine-coated silica particles. Anal Bioanal Chem 409, 4021–4025 (2017). https://doi.org/10.1007/s00216-017-0345-3
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DOI: https://doi.org/10.1007/s00216-017-0345-3