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Updated: Jun 5, 2026
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Robust 3D DNA FISH Using Directly Labeled Probes
Published on: August 15, 2013
Visualization of fine-scale genomic structure by oligonucleotide-based high-resolution FISH
N A Yamada1, L S Rector, P Tsang
1Agilent Laboratories, Agilent Technologies, Santa Clara, Calif., USA. alice_yamada@agilent.com
Cytogenetic and Genome Research
|December 24, 2010
Summary
High-resolution fluorescence in situ hybridization (FISH) enables detailed visualization of genomic structures. This advanced FISH method accurately maps small DNA regions, revealing complex genomic variations with high success rates.
Area of Science:
- Genomics
- Molecular Biology
- Cytogenetics
Background:
- Complex structural variations in genomes necessitate higher-resolution chromosome visualization.
- Existing methods may lack the resolution required for detailed genomic analysis.
Purpose of the Study:
- To establish a robust, high-resolution fluorescence in situ hybridization (FISH) method.
- To enable visualization of small genomic regions and complex structural variations.
Main Methods:
- Utilized long oligonucleotide probes (>150 mers) synthesized via massively parallel reactions.
- Employed in silico selected oligonucleotides targeting informative genomic elements.
- Developed a FISH method eliminating the need for suppressive hybridization reagents.
Main Results:
- Successfully visualized genomic regions as small as 6.7 kb with high specificity on human metaphase chromosomes.
- Achieved an overall success rate of 94% for the high-resolution FISH technique.
- Differentiated direct and inverted duplications within a 479-kb region, highlighting fine-scale genomic complexity.
Conclusions:
- The developed high-resolution FISH method offers unprecedented insight into genomic structure complexity.
- This technique is reproducible, accurate, and adaptable for routine analysis of challenging genomic regions.
- FISH probe design for any sequenced genome facilitates broad application in genetic research.
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