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Discovery and Characterization of Super-Enhancer-Associated Dependencies in Diffuse Large B Cell Lymphoma

Author(s)
Chapuy, Bjoern; McKeown, Michael R.; Lin, Charles Y.; Monti, Stefano; Roemer, Margaretha G.M.; Qi, Jun; Rahl, Peter B.; Sun, Heather H.; Yeda, Kelly T.; Doench, John G.; Reichert, Elaine; Kung, Andrew L.; Rodig, Scott J.; Young, Richard A.; Shipp, Margaret A.; Bradner, James E.; Young, Richard A.; ... Show more Show less
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Abstract
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.
Date issued
2013-12
URI
http://hdl.handle.net/1721.1/103897
Department
Massachusetts Institute of Technology. Department of Biology; Whitehead Institute for Biomedical Research
Journal
Cancer Cell
Publisher
Elsevier
Citation
Chapuy, Bjoern, Michael R. McKeown, Charles Y. Lin, Stefano Monti, Margaretha G.M. Roemer, Jun Qi, Peter B. Rahl, Heather H. Sun, Kelly T. Yeda, John G. Doench, Elaine Reichert, Andrew L. Kung, Scott J. Rodig, Richard A. Young, Margaret A. Shipp, and James E. Bradner. "Discovery and Characterization of Super-Enhancer-Associated Dependencies in Diffuse Large B Cell Lymphoma." Cancer Cell 24:6 (December 2013), pp. 777-790.
Version: Author's final manuscript
ISSN
15356108

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