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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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Rapid, Safe, and Simple Manual Bedside Nucleic Acid Extraction for the Detection of Virus in Whole Blood Samples
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Efficient extraction of adventitious virus nucleic acid using commercially available methods.

William G Valiant1, Jon Borman2, Kang Cai2

  • 1Biomolecular Measurement Division, Applied Genetics Group, National Institute of Standards and Technology, Gaithersburg, MD, USA.

Biologicals : Journal of the International Association of Biological Standardization
|December 29, 2023
PubMed
Summary

This study evaluated four nucleic acid extraction methods for detecting viral contamination in pharmaceuticals. A silica-column based method demonstrated superior viral nucleic acid recovery, crucial for sensitive contamination screening.

Keywords:
Adventitious virusesContaminationDigital droplet PCRNucleaseNucleic acid extractionViral nucleic acid

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Area of Science:

  • Pharmaceutical Science
  • Virology
  • Molecular Biology

Background:

  • Pharmaceutical product development requires rigorous screening for adventitious viral contamination.
  • Sensitive assays are needed to detect low levels of viral nucleic acid.

Purpose of the Study:

  • To compare the efficiency of four different nucleic acid extraction methods.
  • To assess viral nucleic acid recovery in relevant pharmaceutical matrices.
  • To identify optimal extraction methods for sensitive viral detection.

Main Methods:

  • Three model viruses (Minute virus of Mice, Porcine Circovirus, Feline Leukemia Virus) were used.
  • Nucleic acid extraction was performed using four distinct methods (kits and manual).
  • Quantification of extracted nucleic acid was done via droplet digital PCR.

Main Results:

  • All four methods successfully recovered viral nucleic acid from tested matrices.
  • The silica-column based extraction method yielded significantly higher viral nucleic acid recovery.
  • Similar results were observed using bioreactor supernatant, mimicking industry conditions.

Conclusions:

  • Silica-column based extraction is highly effective for recovering viral nucleic acid in pharmaceutical contexts.
  • This finding supports the selection of optimal extraction methods for sensitive contamination detection.
  • The study provides insights for Next Generation Sequencing and PCR applications in pharmaceutical quality control.