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3D Multicolor DNA FISH Tool to Study Nuclear Architecture in Human Primary Cells
Published on: January 25, 2020
3D genome organization in tissue regeneration involves long-range chromatin loops
Palmira Llorens-Giralt1, Carlos Camilleri-Robles1, Leo Zuber2,3
1Department of Genetics, Microbiology, and Statistics, School of Biology, Institute of Biomedicine (IBUB), University of Barcelona, Barcelona, Catalonia, Spain.
Science Advances
|August 7, 2026
Summary
Genome architecture changes during tissue regeneration. New chromatin loops are essential for Drosophila wing disc repair, impacting gene expression and 3D genome organization for successful regeneration.
Area of Science:
- Genomics
- Developmental Biology
- Molecular Biology
Background:
- The three-dimensional (3D) genome organization is crucial for regulating gene expression.
- Understanding how genome architecture changes during tissue regeneration is vital but poorly understood.
Purpose of the Study:
- To investigate the role of 3D genome architecture in Drosophila wing imaginal disc regeneration.
- To identify specific genomic elements and their functions during the regenerative process.
Main Methods:
- Utilized Hi-C technology to profile 3D chromatin conformation during Drosophila wing imaginal disc regeneration.
- Performed targeted deletion of identified chromatin loop anchors to assess their functional significance.
Main Results:
- Compartments and topologically associating domains (TADs) were largely maintained during regeneration.
- Regeneration showed reduced compartmentalization and decreased boundary insulation.
- Identified three long-range chromatin loops with increased contact frequency during regeneration.
- These loops were essential for disc regeneration but not normal wing development.
- Disruption of these loops led to coordinated changes in gene expression and the H3K4me1 3D environment.
Conclusions:
- 3D genome architecture actively contributes to tissue regeneration.
- Specific long-range chromatin loops play a critical, coordinated role in the regenerative process.
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