Abstract:
: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.
journal_name
Cancer Celljournal_title
Cancer cellauthors
DeNardo DG,Barreto JB,Andreu P,Vasquez L,Tawfik D,Kolhatkar N,Coussens LMdoi
10.1016/j.ccr.2009.06.018subject
Has Abstractpub_date
2009-08-04 00:00:00pages
91-102issue
2eissn
1535-6108issn
1878-3686pii
S1535-6108(09)00216-5journal_volume
16pub_type
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