期刊
JOURNAL OF EXPERIMENTAL MEDICINE
卷 216, 期 4, 页码 966-981出版社
ROCKEFELLER UNIV PRESS
DOI: 10.1084/jem.20181276
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资金
- CRUK [C18680/A25508]
- European Research Council [647685 CO-MAL]
- Kay Kendall Leukaemia Fund
- Medical Research Council (MRC)
- Bloodwise
- Wellcome Trust [109967/Z/15/Z, 100140]
- Cambridge National Institute of Health Research Biomedical Research Centre
- Wellcome Trust/MRC center grant [097922/Z/11/Z]
- MRC
- Cambridge National Institute of Health Research Biomedical Research Centre Cell Phenotyping Hub
- Wellcome Trust [109967/Z/15/Z, 097922/Z/11/Z] Funding Source: Wellcome Trust
- MRC [MR/R009708/1] Funding Source: UKRI
Epigenetic regulators, such as EZH2, are frequently mutated in cancer, and loss-of-function EZH2 mutations are common in myeloid malignancies. We have examined the importance of cellular context for Ezh2 loss during the evolution of acute myeloid leukemia (AML), where we observed stage-specific and diametrically opposite functions for Ezh2 at the early and late stages of disease. During disease maintenance, WT Ezh2 exerts an oncogenic function that may be therapeutically targeted. In contrast, Ezh2 acts as a tumor suppressor during AML induction. Transcriptional analysis explains this apparent paradox, demonstrating that loss of Ezh2 derepresses different expression programs during disease induction and maintenance. During disease induction, Ezh2 loss derepresses a subset of bivalent promoters that resolve toward gene activation, inducing a feto-oncogenic program that includes genes such as Plag1, whose overexpression phenocopies Ezh2 loss to accelerate AML induction in mouse models. Our data highlight the importance of cellular context and disease phase for the function of Ezh2 and its potential therapeutic implications.
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