Investigation for NK cell subset homeostasis and function in tumor mocroenvironment

CD27hi NK subset was the major population within tumor-infiltrating NK cells to be an early source of IFN-γ. Endogenous IFN-g was critical for NK cell recruitment into the tumor site and further critical effector molecule for anti-metastatic activity of NK cells. TRAIL, the effector molecule of NK cells, contrary played pro-metastatic role by providing inflammatory signal into tumor cells.