Related Experiment Video
Updated: Nov 16, 2025
11:25
3D Multicolor DNA FISH Tool to Study Nuclear Architecture in Human Primary Cells
Published on: January 25, 2020
10.6K
Super-resolution microscopy of genome organization.
1Department of Chemistry, Korea University, Seoul, 02481, Korea. sangheeshim@korea.ac.kr.
Genes & Genomics
|February 25, 2021
Summary
New sequencing and imaging tools reveal genome folding in 3D, showing both common patterns and individual cell differences. These technologies offer insights into genome structure dynamics and architectural protein functions.
Area of Science:
- Genomics and Molecular Biology
- Cell Biology
- Biophysics
Background:
- Understanding the three-dimensional (3D) folding of the genome within the nucleus is crucial for gene regulation and cellular function.
- Previous methods like Chromosome Conformation Capture sequencing (3C) have identified large-scale chromatin structures, such as topologically associated domains (TADs) and loops.
- Limitations exist in resolving fine-scale structures and capturing cell-to-cell variability in genome organization.
Purpose of the Study:
- To introduce recent advancements in genome visualization technologies, focusing on highly multiplexed labeling and reading techniques.
- To compare and contrast findings from advanced imaging with sequencing-based methods for genome structure analysis.
- To review emerging tools for visualizing dynamic changes in genome structure within live cells.
Main Methods:
- Utilizing super-resolution fluorescence microscopy with nanometer resolution and multiplexed, sequence-specific labeling.
- Applying advanced genome visualization tools capable of highly multiplexed labeling and reading.
- Reviewing live-cell labeling methods, including the CRISPR/dCas9 system, for imaging specific genomic loci.
Main Results:
- Advanced imaging technologies visualize chromatin structures from chromosome-level folds to cis-regulatory element loops in individual nuclei.
- Imaging results show ensemble behaviors consistent with sequencing data but also reveal significant single-cell variations.
- Contradictory findings emerged regarding the roles of architectural proteins (e.g., cohesin, CTCF) and enhancer-promoter interactions.
Conclusions:
- Recent technological advancements provide unprecedented views into genome 3D organization, complementing and sometimes challenging existing models.
- The visualization of single-cell variations highlights the heterogeneity of nuclear architecture and its potential functional implications.
- Emerging live-cell imaging tools, particularly CRISPR/dCas9, promise to unlock the dynamics of genome structural changes.
