[PDF][PDF] Discovery and characterization of super-enhancer-associated dependencies in diffuse large B cell lymphoma

B Chapuy, MR McKeown, CY Lin, S Monti… - Cancer cell, 2013 - cell.com
B Chapuy, MR McKeown, CY Lin, S Monti, MGM Roemer, J Qi, PB Rahl, HH Sun, KT Yeda…
Cancer cell, 2013cell.com
Diffuse large B cell lymphoma (DLBCL) is a biologically heterogeneous and clinically
aggressive disease. Here, we explore the role of bromodomain and extra-terminal domain
(BET) proteins in DLBCL, using integrative chemical genetics and functional epigenomics.
We observe highly asymmetric loading of bromodomain 4 (BRD4) at enhancers, with
approximately 33% of all BRD4 localizing to enhancers at 1.6% of occupied genes. These
super-enhancers prove particularly sensitive to bromodomain inhibition, explaining the …
Summary
Diffuse large B cell lymphoma (DLBCL) is a biologically heterogeneous and clinically aggressive disease. Here, we explore the role of bromodomain and extra-terminal domain (BET) proteins in DLBCL, using integrative chemical genetics and functional epigenomics. We observe highly asymmetric loading of bromodomain 4 (BRD4) at enhancers, with approximately 33% of all BRD4 localizing to enhancers at 1.6% of occupied genes. These super-enhancers prove particularly sensitive to bromodomain inhibition, explaining the selective effect of BET inhibitors on oncogenic and lineage-specific transcriptional circuits. Functional study of genes marked by super-enhancers identifies DLBCLs dependent on OCA-B and suggests a strategy for discovering unrecognized cancer dependencies. Translational studies performed on a comprehensive panel of DLBCLs establish a therapeutic rationale for evaluating BET inhibitors in this disease.
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