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Related Concept Videos

Labeling DNA Probes03:31

Labeling DNA Probes

DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...

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Purification of Viral DNA for the Identification of Associated Viral and Cellular Proteins
08:26

Purification of Viral DNA for the Identification of Associated Viral and Cellular Proteins

Published on: August 31, 2017

Viral detection using DNA functionalized gold filaments.

Jonas W Perez1, Frederick R Haselton, David W Wright

  • 1Vanderbilt University, Department of Chemistry, Station B 351822, Nashville, TN 37235, USA.

The Analyst
|May 8, 2010
PubMed
Summary
This summary is machine-generated.

This study presents a novel method for early detection of pediatric viruses, achieving a low detection limit of 11.9 PFU for respiratory syncytial virus (RSV). The simple, rapid, and label-free assay offers significant improvements over existing methods for clinical viral detection.

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Area of Science:

  • Biotechnology
  • Molecular Diagnostics
  • Nanotechnology

Background:

  • Early detection of pediatric viruses is crucial for timely intervention.
  • Current diagnostic methods often lack a low detection limit, simplicity, or speed.
  • A need exists for improved viral detection platforms in clinical settings.

Purpose of the Study:

  • To develop a simple, rapid, and sensitive method for detecting viral RNA.
  • To evaluate the efficacy of a DNA hairpin-probe-functionalized gold filament assay for respiratory syncytial virus (RSV).

Main Methods:

  • Utilized DNA hairpin structures covalently attached to a gold filament for label-free detection of viral RNA.
  • Employed a sequence targeting repetitive regions of the RSV genome for enhanced detection.
  • Assayed RSV using the functionalized filament in a capillary tube system followed by fluorescence scanning.

Main Results:

  • The developed assay demonstrated a lower limit of detection of 11.9 plaque forming units (PFU).
  • Achieved a detection limit approximately 200 times better than standard ELISA.
  • The assay showed a typical sigmoidal response curve, plateauing at 300 PFU.

Conclusions:

  • The novel approach offers a simple, rapid, and sensitive method for viral RNA detection.
  • This technology shows promise for development into a clinical viral detection platform.
  • The low detection limit and ease of use make it suitable for early pediatric virus identification.