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Updated: Feb 15, 2026
09:02
Immunoglobulin Gene Sequence Analysis In Chronic Lymphocytic Leukemia: From Patient Material To Sequence Interpretation
Published on: November 26, 2018
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BRD4 Profiling Identifies Critical Chronic Lymphocytic Leukemia Oncogenic Circuits and Reveals Sensitivity to
Hatice Gulcin Ozer1, Dalia El-Gamal2, Ben Powell3
1Department of Biomedical Informatics, The Ohio State University, Columbus, Ohio.
Cancer Discovery
|February 2, 2018
Summary
Bromodomain and extra-terminal (BET) protein BRD4 is overexpressed in chronic lymphocytic leukemia (CLL). Targeting BRD4 with PLX51107 shows promise as an epigenetic therapy for CLL by inhibiting key cancer pathways.
Area of Science:
- Oncology
- Epigenetics
- Molecular Biology
Background:
- Bromodomain and extra-terminal (BET) proteins regulate gene expression and are implicated in cancer.
- Chronic lymphocytic leukemia (CLL) pathogenesis involves dysregulated gene expression.
- Functional studies of BRD4 in CLL were previously lacking.
Purpose of the Study:
- To identify critical pathways in CLL pathogenesis using BRD4 profiling.
- To evaluate the therapeutic potential of a novel BET inhibitor, PLX51107, in CLL.
- To investigate BRD4's role in the core CLL transcriptional program.
Main Methods:
- BRD4 profiling in CLL patient samples.
- Genomic, functional, and pharmacologic analyses.
- Preclinical testing of PLX51107 in CLL models.
Main Results:
- BRD4 is overexpressed in CLL and enriched near upregulated genes, including those in the B-cell receptor (BCR) signaling pathway.
- PLX51107 demonstrated potent in vitro and in vivo efficacy in preclinical CLL models, comparable or superior to BCR signaling agents.
- BRD4 regulates core CLL transcriptional programs.
Conclusions:
- BRD4 plays a significant role in CLL pathogenesis.
- BET inhibition, specifically with PLX51107, represents a viable epigenetic therapeutic strategy for CLL.
- BRD4 profiling can identify therapeutic targets in other cancers.
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