Developmentally regulated higher-order chromatin interactions orchestrate B cell fate commitment.
Ravi Boya1, Anurupa Devi Yadavalli1, Sameena Nikhat1
1Department of Animal Biology, School of Life Sciences, University of Hyderabad, Hyderabad 500046, India.
Nucleic Acids Research
|October 5, 2017
Summary
Chromatin reorganization during B-cell development involves dynamic changes in genome architecture, influencing gene expression and cell fate. Key factors like Ebf1 and Pax5 play roles in this process.
Area of Science:
- Cellular and Molecular Biology
- Developmental Biology
- Genomics
Background:
- 3D genome organization is crucial for regulating gene expression.
- Alterations in chromatin architecture during B-cell fate determination from multipotent progenitors are not well understood.
Purpose of the Study:
- To investigate dynamic changes in genome architecture during B-cell fate determination.
- To identify genomic loci and structural alterations associated with B-cell commitment.
- To explore the roles of Ebf1 and Pax5 in chromatin reorganization.
Main Methods:
- Integration of in situ Hi-C, epigenetic landscapes, and genome-wide expression profiles.
- Tracking changes in genome architecture during cell differentiation.
- Analysis of topologically associating domains (TADs) and cis-regulatory interactions.
Main Results:
- Identified genomic loci switching between A and B compartments during B-cell fate determination.
- Observed structural alterations in TADs linked to changes in cis-regulatory interactions.
- Demonstrated potential roles for Ebf1 and Pax5 in chromatin reorganization and transcription.
Conclusions:
- Chromatin reorganization is dynamically linked to lineage-specific gene expression patterns.
- These dynamics are critical for dictating cell-fate determination in B-cell development.
- Provides a paradigm for understanding the interplay between genome architecture and cell differentiation.
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