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2017 ; 8
(ä): 760
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NK Cell Exhaustion
#MMPMID28702032
Bi J
; Tian Z
Front Immunol
2017[]; 8
(ä): 760
PMID28702032
show ga
Natural killer cells are important effector lymphocytes of the innate immune
system, playing critical roles in antitumor and anti-infection host defense.
Tumor progression or chronic infections, however, usually leads to exhaustion of
NK cells, thus limiting the antitumor/infection potential of NK cells. In many
tumors or chronic infections, multiple mechanisms might contribute to the
exhaustion of NK cells, such as dysregulated NK cell receptors signaling, as well
as suppressive effects by regulatory cells or soluble factors within the
microenvironment. Better understanding of the characteristics, as well as the
underlying mechanisms of NK cell exhaustion, not only should increase our
understanding of the basic biology of NK cells but also could reveal novel NK
cell-based antitumor/infection targets. Here, we provide an overview of our
current knowledge on NK cell exhaustion in tumors, and in chronic infections.