Role of TGF-β signaling in generation of CD39+CD73+ myeloid cells in tumors

There is growing evidence that generation of adenosine from ATP, which is mediated by the CD39/CD73 enzyme pair, predetermines immunosuppressive and proangiogenic properties of myeloid cells. We have previously shown that the deletion of the TGF-β type II receptor gene (Tgfbr2) expression in myeloid...

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Bibliographic Details
Published in:The Journal of immunology (1950) 2014-09, Vol.193 (6), p.3155-3164
Main Authors: Ryzhov, Sergey V, Pickup, Michael W, Chytil, Anna, Gorska, Agnieszka E, Zhang, Qinkun, Owens, Philip, Feoktistov, Igor, Moses, Harold L, Novitskiy, Sergey V
Format: Article
Language:English
Subjects:
5'-Nucleotidase - biosynthesis
Animals
Antigens, CD - biosynthesis
Apyrase - biosynthesis
Bone Marrow Cells - immunology
Carcinoma, Lewis Lung - genetics
Carcinoma, Lewis Lung - pathology
Cell Differentiation
Cell Line, Tumor
Cell Movement - immunology
Female
Mammary Glands, Animal - cytology
Mammary Glands, Animal - immunology
Mammary Neoplasms, Animal - genetics
Mammary Neoplasms, Animal - pathology
Mice
Mice, Inbred C57BL
Mice, Knockout
Myeloid Cells - immunology
Protein-Serine-Threonine Kinases - biosynthesis
Protein-Serine-Threonine Kinases - genetics
Receptors, Transforming Growth Factor beta - biosynthesis
Receptors, Transforming Growth Factor beta - genetics
Signal Transduction - immunology
T-Lymphocytes - immunology
Transforming Growth Factor beta - immunology
Tumor Microenvironment
Vascular Endothelial Growth Factor A - secretion
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Summary:There is growing evidence that generation of adenosine from ATP, which is mediated by the CD39/CD73 enzyme pair, predetermines immunosuppressive and proangiogenic properties of myeloid cells. We have previously shown that the deletion of the TGF-β type II receptor gene (Tgfbr2) expression in myeloid cells is associated with decreased tumor growth, suggesting protumorigenic effect of TGF-β signaling. In this study, we tested the hypothesis that TGF-β drives differentiation of myeloid-derived suppressor cells into protumorigenic terminally differentiated myeloid mononuclear cells (TDMMCs) characterized by high levels of cell-surface CD39/CD73 expression. We found that TDMMCs represent a major cell subpopulation expressing high levels of both CD39 and CD73 in the tumor microenvironment. In tumors isolated from mice with spontaneous tumor formation of mammary gland and conditional deletion of the type II TGF-β receptor in mammary epithelium, an increased level of TGF-β protein was associated with further increase in number of CD39(+)CD73(+) TDMMCs compared with MMTV-PyMT/TGFβRII(WT) control tumors with intact TGF-β signaling. Using genetic and pharmacological approaches, we demonstrated that the TGF-β signaling mediates maturation of myeloid-derived suppressor cells into TDMMCs with high levels of cell surface CD39/CD73 expression and adenosine-generating capacity. Disruption of TGF-β signaling in myeloid cells resulted in decreased accumulation of TDMMCs, expressing CD39 and CD73, and was accompanied by increased infiltration of T lymphocytes, reduced density of blood vessels, and diminished progression of both Lewis lung carcinoma and spontaneous mammary carcinomas. We propose that TGF-β signaling can directly induce the generation of CD39(+)CD73(+) TDMMCs, thus contributing to the immunosuppressive, proangiogenic, and tumor-promoting effects of this pleiotropic effector in the tumor microenvironment.
ISSN:0022-1767
1550-6606
DOI:10.4049/jimmunol.1400578