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07:10
Split Hybridization Probe Utilizing a DNA Fluorescent Light-up Aptamer as a Signal Reporter for Sequence-Specific Nucleic Acid Analysis
Published on: July 8, 2025
DNA diagnostics by surface-bound melt-curve reactions.
Linda Strömqvist Meuzelaar1, Katie Hopkins, Ernesto Liebana
1Department of Genetics, University of Leicester, University Rd., Leicester, LE1 7RH, UK.
The Journal of Molecular Diagnostics : JMD
|January 26, 2007
Summary
Dynamic Allele-Specific Hybridization (DASH) accurately identifies DNA sequence variants for diagnostics. This fluorescence-based method reliably detects mutations and single nucleotide polymorphisms in human and bacterial DNA.
Area of Science:
- Molecular Biology
- Genetics
- Biotechnology
Background:
- Melting-curve analysis offers real-time DNA denaturation tracking for variant assessment.
- Dynamic Allele-Specific Hybridization (DASH) is a fluorescence-based method for allele-specific probe denaturation.
Purpose of the Study:
- To evaluate the Dynamic Allele-Specific Hybridization (DASH) method for DNA diagnostics.
- To assess DASH's performance in mutation scanning and parallel mutation scoring.
Main Methods:
- Interrogating a 97 bp human genomic sequence with 15 overlapping probes for mutation scanning.
- Assessing 18 gyrA gene alterations in Salmonella strains using wild-type and mutation-specific probes for parallel mutation scoring.
- Conducting blinded experiments with all results confirmed by sequencing.
Main Results:
- Accurate detection of three high-frequency single nucleotide polymorphisms in 16 individuals.
- Unambiguous resolution of 18 Salmonella gyrA gene mutations across 62 strains.
- No false-positive or false-negative signals observed in any investigation.
Conclusions:
- Dynamic Allele-Specific Hybridization (DASH) demonstrates accuracy and robustness for DNA diagnostics.
- DASH is effective for both mutation scanning (resequencing) and mutation scoring applications.
- The method provides reliable DNA variant resolution crucial for diagnostic challenges.
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