CD4 + T Cells Regulate Pulmonary Metastasis of Mammary Carcinomas by Enhancing Protumor Properties of Macrophages

During breast cancer development, increased presence of leukocytes in neoplastic stroma parallels disease progression; however, the functional significance of leukocytes in regulating protumor versus antitumor immunity in the breast remains poorly understood. Utilizing the MMTV-PyMT model of mammary...

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Bibliographic Details
Published in:	Cancer cell Vol. 16; no. 2; pp. 91 - 102
Main Authors:	DeNardo, David G., Barreto, Jairo B., Andreu, Pauline, Vasquez, Lesley, Tawfik, David, Kolhatkar, Nikita, Coussens, Lisa M.
Format:	Journal Article
Language:	English
Published:	United States Elsevier Inc 04-08-2009
Subjects:	Adenocarcinoma - immunology Adenocarcinoma - pathology Adenocarcinoma - secondary Animals CD4-Positive T-Lymphocytes - physiology CELLCYCLE CELLIMMUNO Epidermal Growth Factor - metabolism Female Interleukin-4 - metabolism Interleukin-4 - physiology Lung Neoplasms - immunology Lung Neoplasms - secondary Macrophages - physiology Mammary Neoplasms, Experimental - immunology Mammary Neoplasms, Experimental - pathology Mice Mice, Transgenic Myeloid Cells - pathology Phenotype Signal Transduction Th2 Cells - metabolism CELLCYCLE CELLIMMUNO
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Summary:	During breast cancer development, increased presence of leukocytes in neoplastic stroma parallels disease progression; however, the functional significance of leukocytes in regulating protumor versus antitumor immunity in the breast remains poorly understood. Utilizing the MMTV-PyMT model of mammary carcinogenesis, we demonstrate that IL-4-expressing CD4 + T lymphocytes indirectly promote invasion and subsequent metastasis of mammary adenocarcinomas by directly regulating the phenotype and effector function of tumor-associated CD11b +Gr1 -F4/80 + macrophages that in turn enhance metastasis through activation of epidermal growth factor receptor signaling in malignant mammary epithelial cells. Together, these data indicate that antitumor acquired immune programs can be usurped in protumor microenvironments and instead promote malignancy by engaging cellular components of the innate immune system functionally involved in regulating epithelial cell behavior.
ISSN:	1535-6108 1878-3686
DOI:	10.1016/j.ccr.2009.06.018