期刊
NATURE IMMUNOLOGY
卷 21, 期 1, 页码 75-+出版社
NATURE PORTFOLIO
DOI: 10.1038/s41590-019-0555-2
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资金
- GGSRT [Aristeia II 3468]
- German Research Foundation [BE 4427/3-1, SFB 1181]
- ERC [DEMETINL-683145]
- ERC under the European Union's Horizon 2020 research and innovation program [742390]
- IKY Fellowship of Excellence for Postgraduate Studies in Greece
- IKY Fellowship of 'Stratigos' grant of the Hellenic Society of Melanoma Study
- European Union (European Social Fund) through the Operational Program 'Human Resources Development, Education and Lifelong Learning' [MIS-5001552]
- European Union's Horizon 2020 research and innovation program [733100]
- IKY Fellowship of Siemens Program
- H2020 Societal Challenges Programme [733100] Funding Source: H2020 Societal Challenges Programme
Regulatory T (T-reg) cells accumulate into tumors, hindering the success of cancer immunotherapy. Yet, therapeutic targeting of T-reg cells shows limited efficacy or leads to autoimmunity. The molecular mechanisms that guide T-reg cell stability in tumors remain elusive. In the present study, we identify a cell-intrinsic role of the alarmin interleukin (IL)-33 in the functional stability of T-reg cells. Specifically, IL-33-deficient T-reg cells demonstrated attenuated suppressive properties in vivo and facilitated tumor regression in a suppression of tumorigenicity 2 receptor (ST2) (IL-33 receptor)-independent fashion. On activation, Il33(-/-) T-reg cells exhibited epigenetic re-programming with increased chromatin accessibility of the Ifng locus, leading to elevated interferon (IFN)-. production in a nuclear factor (NF)-kappa B-T-bet-dependent manner. IFN-gamma was essential for T-reg cell defective function because its ablation restored Il33(-/-) T-reg cell-suppressive properties. Importantly, genetic ablation of Il33 potentiated the therapeutic effect of immunotherapy. Our findings reveal a new and therapeutically important intrinsic role of IL-33 in T-reg cell stability in cancer.
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