B7-H4 expression identifies a novel suppressive macrophage population in human ovarian carcinoma
Ilona Kryczek,Ilona Kryczek,Linhua Zou,Linhua Zou,Paulo C. Rodriguez,Gefeng Zhu,Shuang Wei,Shuang Wei,Peter Mottram,Michael J. Brumlik,Pui Cheng,Tyler J. Curiel,Leann Myers,Andrew A. Lackner,Xavier Alvarez,Augusto C. Ochoa,Lieping Chen,Weiping Zou,Weiping Zou +18 more
TL;DR: B7-H4+ tumor macrophages constitute a novel suppressor cell population in ovarian cancer and represent a critical checkpoint in determining host responses to dysfunctional cytokines in ovariancancer.
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Abstract: Tumor-associated macrophages are a prominent component of ovarian cancer stroma and contribute to tumor progression. B7-H4 is a recently identified B7 family molecule. We show that primary ovarian tumor cells express intracellular B7-H4, whereas a fraction of tumor macrophages expresses surface B7-H4. B7-H4+ tumor macrophages, but not primary ovarian tumor cells, suppress tumor-associated antigen-specific T cell immunity. Blocking B7-H4-, but not arginase-, inducible nitric oxide synthase or B7-H1 restored the T cell stimulating capacity of the macrophages and contributes to tumor regression in vivo. Interleukin (IL)-6 and IL-10 are found in high concentrations in the tumor microenvironment. These cytokines stimulate macrophage B7-H4 expression. In contrast, granulocyte/macrophage colony-stimulating factor and IL-4, which are limited in the tumor microenvironment, inhibit B7-H4 expression. Ectopic expression of B7-H4 makes normal macrophages suppressive. Thus, B7-H4+ tumor macrophages constitute a novel suppressor cell population in ovarian cancer. B7-H4 expression represents a critical checkpoint in determining host responses to dysfunctional cytokines in ovarian cancer. Blocking B7-H4 or depleting B7-H4+ tumor macrophages may represent novel strategies to enhance T cell tumor immunity in cancer.
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References
Macrophage polarization: tumor-associated macrophages as a paradigm for polarized M2 mononuclear phagocytes
Alberto Mantovani,Silvano Sozzani,Silvano Sozzani,Massimo Locati,Paola Allavena,Antonio Sica +5 more
TL;DR: These functionally polarized cells, and similarly oriented or immature dendritic cells present in tumors, have a key role in subversion of adaptive immunity and in inflammatory circuits that promote tumor growth and progression.
5.5K
Specific recruitment of regulatory T cells in ovarian carcinoma fosters immune privilege and predicts reduced survival.
Tyler J. Curiel,George Coukos,Linhua Zou,Xavier Alvarez,Pui Cheng,Peter Mottram,Melina Evdemon-Hogan,Jose R. Conejo-Garcia,Lin Zhang,Matthew E. Burow,Yun Zhu,Shuang Wei,Ilona Kryczek,Ben Daniel,Alan N. Gordon,Leann Myers,Andrew A. Lackner,Mary L. Disis,Keith L. Knutson,Lieping Chen,Weiping Zou +20 more
TL;DR: It is shown, in detailed studies of CD4+CD25+FOXP3+ Treg cells in 104 individuals affected with ovarian carcinoma, that human tumor T Reg cells suppress tumor-specific T cell immunity and contribute to growth of human tumors in vivo.
5.3K
Tumor-associated B7-H1 promotes T-cell apoptosis: a potential mechanism of immune evasion
Haidong Dong,Scott E. Strome,Diva R. Salomao,Hideto Tamura,Fumiya Hirano,Dallas B. Flies,Patrick C. Roche,Jun Lu,Gefeng Zhu,Koji Tamada,Vanda A. Lennon,Esteban Celis,Lieping Chen +12 more
TL;DR: It is reported here that, except for cells of the macrophage lineage, normal human tissues do not express B7-H1 and the findings have implications for the design of T cell–based cancer immunotherapy.
4.9K
Tumour-educated macrophages promote tumour progression and metastasis
TL;DR: Macrophages are educated by the tumour microenvironment, so that they adopt a trophic role that facilitates angiogenesis, matrix breakdown and tumour-cell motility — all of which are elements of the metastatic process.
3.4K
M-1/M-2 macrophages and the Th1/Th2 paradigm.
TL;DR: The results indicate that M-1- or M-2-dominant macrophage responses can influence whether Th1/Th2 or other types of inflammatory responses occur.
3K
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