Abstract:
:The gene encoding the lysine-specific histone methyltransferase KMT2D has emerged as one of the most frequently mutated genes in follicular lymphoma and diffuse large B cell lymphoma; however, the biological consequences of KMT2D mutations on lymphoma development are not known. Here we show that KMT2D functions as a bona fide tumor suppressor and that its genetic ablation in B cells promotes lymphoma development in mice. KMT2D deficiency also delays germinal center involution and impedes B cell differentiation and class switch recombination. Integrative genomic analyses indicate that KMT2D affects methylation of lysine 4 on histone H3 (H3K4) and expression of a set of genes, including those in the CD40, JAK-STAT, Toll-like receptor and B cell receptor signaling pathways. Notably, other KMT2D target genes include frequently mutated tumor suppressor genes such as TNFAIP3, SOCS3 and TNFRSF14. Therefore, KMT2D mutations may promote malignant outgrowth by perturbing the expression of tumor suppressor genes that control B cell-activating pathways.
journal_name
Nat Medjournal_title
Nature medicineauthors
Ortega-Molina A,Boss IW,Canela A,Pan H,Jiang Y,Zhao C,Jiang M,Hu D,Agirre X,Niesvizky I,Lee JE,Chen HT,Ennishi D,Scott DW,Mottok A,Hother C,Liu S,Cao XJ,Tam W,Shaknovich R,Garcia BA,Gascoyne RD,Ge K,Shilatifdoi
10.1038/nm.3943subject
Has Abstractpub_date
2015-10-01 00:00:00pages
1199-208issue
10eissn
1078-8956issn
1546-170Xpii
nm.3943journal_volume
21pub_type
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