期刊
SCIENCE
卷 344, 期 6186, 页码 921-925出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1252510
关键词
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资金
- Cancer Research Institute Tumor Immunology Predoctoral Fellowship Training Grant
- NIH grant [AI101251]
- Cancer Research Institute Clinic and Laboratory Integration Program Grant
- American Cancer Society Research Scholar Award
Long recognized as an evolutionarily ancient cell type involved in tissue homeostasis and immune defense against pathogens, macrophages are being rediscovered as regulators of several diseases, including cancer. Here we show that in mice, mammary tumor growth induces the accumulation of tumor-associated macrophages (TAMs) that are phenotypically and functionally distinct from mammary tissue macrophages (MTMs). TAMs express the adhesion molecule Vcam1 and proliferate upon their differentiation from inflammatory monocytes, but do not exhibit an alternatively activated phenotype. TAM terminal differentiation depends on the transcriptional regulator of Notch signaling, RBPJ; and TAM, but not MTM, depletion restores tumor-infiltrating cytotoxic T cell responses and suppresses tumor growth. These findings reveal the ontogeny of TAMs and a discrete tumor-elicited inflammatory response, which may provide new opportunities for cancer immunotherapy.
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