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Robust 3D DNA FISH Using Directly Labeled Probes
Published on: August 15, 2013
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Visualizing chromatin communication in living cells through Oligo-LiveFISH.
Mattia Conte1, Mario Nicodemi1
1Dipartimento di Fisica, Università di Napoli Federico II and INFN Napoli, Complesso Universitario di Monte Sant'Angelo, 80126 Naples, Italy.
Cell Reports Methods
|June 10, 2025
Summary
Researchers developed Oligo-LiveFISH, a novel live-cell imaging technique. This method tracks genome organization dynamics with high resolution without requiring genetic modification.
Area of Science:
- Molecular Biology
- Genetics
- Cell Biology
Background:
- Understanding genome regulation necessitates real-time observation of chromatin dynamics.
- Current methods for tracking genomic loci in live cells often require genome engineering, limiting their application.
Purpose of the Study:
- To introduce Oligo-LiveFISH, a new platform for high-resolution live-cell imaging of chromatin dynamics.
- To enable tracking of non-repetitive genomic loci without the need for genome engineering.
Main Methods:
- Assembling fluorescent guide RNA pools with catalytically deactivated Cas9 (dCas9).
- Utilizing the assembled complexes for high-resolution imaging of specific genomic loci in live cells.
- Achieving 20-nm spatial and 50-ms temporal resolution.
Main Results:
- Demonstrated the capability of Oligo-LiveFISH to track non-repetitive genomic loci in real time.
- Successfully applied the platform across various cell lines and primary cells.
- Provided insights into the dynamic organization of the genome.
Conclusions:
- Oligo-LiveFISH offers a powerful, non-invasive tool for studying genome regulation and dynamics.
- The platform's high resolution and versatility advance the field of live-cell imaging for genomic studies.
- This method facilitates a deeper understanding of dynamic genome organization in different cellular contexts.
