Visual DNA as a diagnostic tool

Electrophoresis. 2009 Nov;30(21):3691-5. doi: 10.1002/elps.200900273.

Abstract

We report on the incorporation of the Visual DNA concept in a genotyping assay as a simple and straightforward detection tool. The principle of trapping streptavidin-coated superparamagnetic beads of micrometer size for visualization of genetic variances is used for PrASE-based detection of a panel of mutations in the severe and common genetic disorder of cystic fibrosis. The method allows a final investigation of genotypes by the naked eye and the output is easily documented using a regular hand-held device with an integrated digital camera. A number of samples were run through the assay, showing rapid and accurate detection using superparamagnetic beads and an off-the-shelf neodymium magnet. The assay emphasizes the power of Visual DNA and demonstrates the potential value of the method in future point-of-care tests.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alleles
  • Cystic Fibrosis Transmembrane Conductance Regulator / genetics
  • DNA / analysis*
  • Magnetics
  • Microspheres
  • Molecular Diagnostic Techniques / methods*
  • Oligonucleotide Array Sequence Analysis / methods*
  • Peptide Hydrolases
  • Polymerase Chain Reaction
  • Polymorphism, Genetic / genetics*
  • Sequence Analysis, DNA / methods*

Substances

  • Cystic Fibrosis Transmembrane Conductance Regulator
  • DNA
  • Peptide Hydrolases