期刊
NATURE COMMUNICATIONS
卷 5, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms6108
关键词
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资金
- European Research Council (THINK Advanced Grant)
- INSERM
- CNRS
- Aix Marseille University
Natural killer (NK) cells are cytotoxic innate lymphoid cells that are involved in immune defense. NK cell reactivity is controlled in part by MHC class I recognition by inhibitory receptors, but the underlying molecular mechanisms remain undefined. Using a mouse model of conditional deletion in NK cells, we show here that the protein tyrosine phosphatase SHP-1 is essential for the inhibitory function of NK cell MHC class I receptors. In the absence of SHP-1, NK cells are hyporesponsive to tumour cells in vitro and their early Ca2+ signals are compromised. Mice without SHP-1 in NK cells are unable to reject MHC class I-deficient transplants and to control tumours in vivo. Thus, the inhibitory activity of SHP-1 is needed for setting the threshold of NK cell reactivity.
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