Cited by 186Immune cells in cancerCancer Immunotherapy and BiomarkersImmunotherapy and Immune Responses

EZH2 inhibitor GSK126 suppresses antitumor immunity by driving production of myeloid-derived suppressor cells

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Huang, Shuo, Wang, Zhongyu, Zhou, Jie, Huang, Jiani, Zhou, Li, Luo, Jing, Wan, Yisong Y., Long, Haixia +1 more·2019·Cancer Research

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Abstract

Abstract Enhancer of zeste homolog (EZH2) is a key epigenetic regulator of gene expression and is frequently overexpressed in various cancer types, suggesting a role in oncogenesis. The therapeutic potential of EZH2 inhibitors is currently being explored, but their effect on antitumor immunity is largely unknown. Here we report that suppressing EZH2 activity using EZH2 inhibitor GSK126 resulted in increased numbers of myeloid-derived suppressor cells (MDSC) and fewer CD4+ and IFNγ+CD8+ T cells, which are involved in antitumor immunity. Addition of a neutralizing antibody against the myeloid differentiation antigen GR-1 or gemcitabine/5-fluorouracil–depleted MDSCs alleviated MDSC-mediated immunosuppression and increased CD4+ and CD8+ T-cell tumor infiltration and GSK126 therapeutic efficacy. Mechanistically, we identified a novel pathway of MDSC production in cancer in which EZH2 inhibition directs myeloid differentiation from primitive hematopoietic progenitor cells. These findings suggest that modulating the tumor immune microenvironment may improve the efficacy of EZH2 inhibitors. Significance: This study uncovers a potential mechanism behind disappointing results of a phase I clinical trial of EZH2 inhibitor GSK126 and identifies a translatable combinational strategy to overcome it.

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Crossref · 10.1158/0008-5472.can-18-2395

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  • The EZH2 inhibitor GSK126 promotes MDSC expansion and immunosuppressive functions.

    “EZH2 inhibition with GSK126 reportedly favors MDSC expansion and immunosuppressive functions”

    From Immunomodulation by targeted anticancer agents (2021) · cites this paper as Huang et al., 2019

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Authors
Huang, S., Wang, Z., Zhou, J., Huang, J., Zhou, L., Luo, J., Wan, Y. Y., Long, H., & Zhu, B.
Affiliations
  • Army Medical University (CN)
  • University of North Carolina at Chapel Hill (US)
Corresponding author
  • Long, Haixia
  • Zhu, Bo
Venue
Cancer Research
Published
2019-04-15
Volume
79
Issue
8
Pages
2009-2020
ISSN
  • 0008-5472 (ISSN-L)
  • 1538-7445
OpenAlex
W2911341716
Cited by
185
References
43
Citations by year
2026: 10 · 2025: 28 · 2024: 28 · 2023: 30 · 2022: 29 · 2021: 29 · 2020: 21 · 2019: 9
FWCI
8.92
Type
journal article
Language
en
Open access
Locations
  • Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
  • UNC Libraries
Funders
National Nature Science Foundation of China (81472648, 81802865, and 81620108023)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune cells in cancer
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
Keywords
EZH2, GSK126, EZH2 inhibitors, myeloid-derived suppressor cells, antitumor immunity, tumor immune microenvironment, CD4+ T cells, CD8+ T cells, interferon-gamma, Gr-1, hematopoietic progenitor cells, myeloid differentiation, epigenetic regulation, combination therapy
MeSH terms
Enhancer of Zeste Homolog 2 Protein, Myeloid-Derived Suppressor Cells, Animals, Colonic Neoplasms, Female, Humans, Indoles, Mice, Inbred C57BL, Mice, Nude, Pyridones, Tumor Cells, Cultured, Apoptosis, CD8-Positive T-Lymphocytes, Carcinoma, Lewis Lung, Receptors, Chemokine, Xenograft Model Antitumor Assays, Cell Proliferation, Mice, Antibodies, Neutralizing

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