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DNA Isolation01:24

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DNA isolation protocols can be fast and straightforward or complex and time-consuming depending on the type and quality of DNA required for further processing. For example, plasmid DNA extraction is a bit more complicated than genomic DNA extraction because of the need for an appropriate lysis method to separate plasmid DNA from gDNA during isolation. However, for specific applications, such as long-range DNA sequencing that require a good yield of high- quality DNA samples, we need to follow...
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3D-printed device for time- and cost-efficient sample preparation and DNA fractionation.

Helena Hrušková1, Roman Řemínek2, Marek Minarik3

  • 1Institute of Analytical Chemistry of the Czech Academy of Sciences, Veveří 967/97, Brno, 602 00, Czech Republic; Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.

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Summary

A new 3D-printed device enables efficient DNA pre-extraction from biofluids using gel electrophoresis and electrodialysis. This method improves liquid biopsy sensitivity by separating short DNA fragments from complex samples like blood.

Keywords:
CancerCirculating tumor DNA (ctDNA)Liquid biopsyPCRPreparative gel electrophoresis

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Area of Science:

  • Biotechnology
  • Molecular Biology
  • Analytical Chemistry

Background:

  • Direct DNA detection in biological samples faces selectivity and sensitivity challenges.
  • DNA pre-extraction from biofluids is crucial for advancing molecular diagnostics.
  • Liquid biopsy techniques for circulating tumor DNA (ctDNA) require efficient sample preparation.

Purpose of the Study:

  • To develop a fast, cost-effective, and high-throughput DNA preparation method for biofluids.
  • To improve the sensitivity and selectivity of DNA analysis in complex biological matrices.
  • To specifically enhance liquid biopsy applications by optimizing circulating DNA isolation.

Main Methods:

  • A novel 3D-printed device integrating gel electrophoresis and electrodialysis was designed.
  • The system performs preparative separation of DNA fragments from blood samples.
  • The method focuses on efficient isolation of short DNA fragments while removing large DNA.

Main Results:

  • The developed system achieved time-, cost-, and labor-efficient DNA separation.
  • Recovery rates for short DNA fragments reached up to 80%.
  • The method successfully eliminated large DNA fragments and reduced matrix DNA interference in spiked samples.

Conclusions:

  • The 3D-printed device offers a promising solution for DNA pre-extraction from biofluids.
  • This approach significantly enhances the potential of liquid biopsy and other DNA-based analyses.
  • The method provides a robust tool for isolating target DNA from complex biological samples.