Journal
NATURE IMMUNOLOGY
Volume 11, Issue 11, Pages 1030-U83Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ni.1947
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Funding
- Swiss National Science Foundation
- Swiss Cancer League
- Center for Neurosciences Zurich
- Marie Heim-Vogtlin Programme
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The potent tumoricidal activity of interleukin 12 (IL-12) is thought to be mediated by the activation and polarization of natural killer (NK) cells and T helper type 1 (T(H)1) cells, respectively. By systematic analysis of the IL-12-induced immune response to subcutaneous melanoma (B16), we found that tumor suppression was mediated independently of T lymphocytes or NK cells. IL-12 initiated local antitumor immunity by stimulating a subset of NKp46(+) lymphoid tissue-inducer (LTi) cells dependent on the transcription factor ROR gamma t. The presence of these NKp46(+) LTi cells induced upregulation of adhesion molecules in the tumor vasculature and resulted in more leukocyte invasion. Thus, this innate cell type is responsive to IL-12 and is a powerful mediator of tumor suppression.
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