Regulation of innate immunity by paired receptors
Review articleOpen access
Abstract:

AbstractNK cells show cytotoxicity and cytokine production upon recognition of virus-infected cells. When NK cells are removed from cytomegalovirus-resistant mice, the virus titer after infection is markedly increased and the mice are likely to die due to infection. However, the exact mechanism of how NK cells recognize virus-infected cells has remained unclear for a long time. Recent findings of the presence of virus-specific NK cell receptors and their ligands on virus-infected cells have provided a new vision of a protective role of NK cells in virus infection. Furthermore, the recognition of virus-infected cells by paired receptors consisting of activating and inhibitory receptors was found to correlate with the degree of host susceptibility to virus infection. Here, we would like to discuss the role of NK cells in anti-virus immunity.

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