Abstract
Diffuse large B cell lymphoma (DLBCL) is a complex disease comprising diverse subtypes and genetic profiles. Possibly because of the prevalence of genetic alterations activating canonical NF-κB activity, a role for oncogenic lesions that activate the alternative NF-κB pathway in DLBCL has remained elusive. Here, we show that deletion/mutation of TRAF3, a negative regulator of the alternative NF-κB pathway, occurs in ∼15% of DLBCLs and that it often coexists with BCL6 translocation, which prevents terminal B cell differentiation. Accordingly, in a mouse model constitutive activation of the alternative NF-κB pathway cooperates with BCL6 deregulation in DLBCL development. This work demonstrates a key oncogenic role for the alternative NF-κB pathway in DLBCL development.
Copyright © 2015 The Authors. Published by Elsevier Inc. All rights reserved.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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B-Lymphocytes / cytology
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B-Lymphocytes / immunology
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B-Lymphocytes / metabolism
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Cell Differentiation
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Cell Line, Tumor
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Cell Survival
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DNA-Binding Proteins / deficiency
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DNA-Binding Proteins / genetics*
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DNA-Binding Proteins / metabolism*
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Gene Expression Regulation, Neoplastic*
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Humans
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Lymphoma, Large B-Cell, Diffuse / metabolism
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Lymphoma, Large B-Cell, Diffuse / pathology
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Mice
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Mice, Knockout
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NF-kappa B / metabolism*
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NF-kappaB-Inducing Kinase
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Protein Serine-Threonine Kinases / genetics
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Protein Serine-Threonine Kinases / metabolism
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Proto-Oncogene Proteins c-bcl-6
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Signal Transduction
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TNF Receptor-Associated Factor 3 / genetics
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TNF Receptor-Associated Factor 3 / metabolism
Substances
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Bcl6 protein, mouse
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DNA-Binding Proteins
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NF-kappa B
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Proto-Oncogene Proteins c-bcl-6
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TNF Receptor-Associated Factor 3
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Protein Serine-Threonine Kinases