Related Experiment Video
Updated: Jun 3, 2026
09:58
Mapping the Structure-Function Relationships of Disordered Oncogenic Transcription Factors Using Transcriptomic Analysis
Published on: June 27, 2020
A dose-dependent role for EBF1 in repressing non-B-cell-specific genes.
Kara Lukin1, Scott Fields, Lisa Guerrettaz
1Integrated Department of Immunology, National Jewish Health, Denver, CO 80206, USA.
European Journal of Immunology
|April 7, 2011
Summary
Early B-cell factor 1 (EBF1) is crucial for maintaining B-cell identity. Reduced EBF1 levels lead to inappropriate gene expression and hinder B-cell development, impacting lineage commitment.
Area of Science:
- Immunology
- Developmental Biology
- Molecular Genetics
Background:
- Early B-cell factor 1 (EBF1) absence arrests B-cell development at an uncommitted progenitor stage with expanded lineage potential.
- Previous studies examined EBF1 and Runx1 roles in B lymphopoiesis using heterozygous and compound heterozygous mouse models.
Purpose of the Study:
- To investigate the impact of reduced EBF1 gene dosage on B-cell progenitor gene expression and differentiation.
- To determine the role of EBF1 in maintaining B-cell identity and repressing non-B-cell lineage genes.
Main Methods:
- Analysis of B lymphopoiesis in Ebf1(+/-) Runx1(+/-) (ER(het)) mice.
- Evaluation of NK-cell lineage-specific gene expression and Ly6a/Sca-1 expression in B-cell progenitors.
- Assessing the effects of enforced EBF1 expression in pro-B cells and fetal liver cells.
Main Results:
- Decreased Ebf1 dosage caused inappropriate NK-cell gene expression and prolonged Ly6a/Sca-1 expression in B-cell progenitors.
- These effects were worsened by reduced Runx1 expression, even with Pax5 present.
- Enforced EBF1 expression corrected aberrant gene transcription in pro-B cells and Ebf1(-/-) Pax5(-/-) fetal liver cells.
Conclusions:
- Normal EBF1 levels are essential for maintaining B-cell identity.
- EBF1 directs the repression of non-B-cell-specific genes, preventing aberrant lineage commitment.
- Runx1 haploinsufficiency exacerbates the effects of EBF1 deficiency on B-cell development.
Related Concept Videos
01:52Eukaryotic Transcription Inhibitors
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...
01:30General Transcription Factors
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
02:16Transcription Factors
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
02:04Co-activators and Co-repressors
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
01:58Cell Specific Gene Expression
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
01:58Cell Specific Gene Expression
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...