Mutant EZH2 Induces a Pre-malignant Lymphoma Niche by Reprogramming the Immune Response.
Animals
B-Lymphocytes
/ immunology
Cell Transformation, Neoplastic
/ genetics
Cellular Reprogramming
Dendritic Cells
/ immunology
Enhancer of Zeste Homolog 2 Protein
/ genetics
Female
Germinal Center
/ immunology
Humans
Lymphoma, B-Cell
/ genetics
Lymphoma, Follicular
/ genetics
Mice
Mice, Inbred C57BL
Mutation
EZH2
epigenetic dysregulation
follicular lymphoma
germinal center
immune microenvironment
Journal
Cancer cell
ISSN: 1878-3686
Titre abrégé: Cancer Cell
Pays: United States
ID NLM: 101130617
Informations de publication
Date de publication:
11 05 2020
11 05 2020
Historique:
received:
07
10
2019
revised:
04
02
2020
accepted:
08
04
2020
entrez:
13
5
2020
pubmed:
13
5
2020
medline:
4
11
2020
Statut:
ppublish
Résumé
Follicular lymphomas (FLs) are slow-growing, indolent tumors containing extensive follicular dendritic cell (FDC) networks and recurrent EZH2 gain-of-function mutations. Paradoxically, FLs originate from highly proliferative germinal center (GC) B cells with proliferation strictly dependent on interactions with T follicular helper cells. Herein, we show that EZH2 mutations initiate FL by attenuating GC B cell requirement for T cell help and driving slow expansion of GC centrocytes that become enmeshed with and dependent on FDCs. By impairing T cell help, mutant EZH2 prevents induction of proliferative MYC programs. Thus, EZH2 mutation fosters malignant transformation by epigenetically reprograming B cells to form an aberrant immunological niche that reflects characteristic features of human FLs, explaining how indolent tumors arise from GC B cells.
Identifiants
pubmed: 32396861
pii: S1535-6108(20)30203-8
doi: 10.1016/j.ccell.2020.04.004
pmc: PMC7298875
mid: NIHMS1585838
pii:
doi:
Substances chimiques
EZH2 protein, human
EC 2.1.1.43
Enhancer of Zeste Homolog 2 Protein
EC 2.1.1.43
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
655-673.e11Subventions
Organisme : NCI NIH HHS
ID : R01 CA198089
Pays : United States
Organisme : NCI NIH HHS
ID : R35 CA220499
Pays : United States
Organisme : NIGMS NIH HHS
ID : P41 GM108569
Pays : United States
Organisme : NIAID NIH HHS
ID : R01 AI104739
Pays : United States
Organisme : NCI NIH HHS
ID : P30 CA060553
Pays : United States
Commentaires et corrections
Type : CommentIn
Informations de copyright
Copyright © 2020 Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of Interests A.M.M. is consulting for Epizyme and Constellation Pharmaceuticals, and receives research funding from Janssen Pharmaceuticals; S.H.K. is consulting for Northrop Grumman; C.E.M. is a co-founder and equity stake holder for Onegevity Health and Biotia, Inc.; C.S. has performed consultancy for Seattle Genetics, Curis Inc., Roche, AbbVie, Juno Therapeutics, and Bayer, and has received research funding from Bristol-Myers Squibb and Trillium Therapeutics, Inc. There are no competing interests.
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