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Activation of NK-92 cells by IL-2 induces the killing effect. The (A) production and (B) expression of IFN-γ by NK-92 cells after IL-2 stimulation were higher compared with control. (C) IL-2 stimulation enhanced SW480 cell killing by NK-92 cells. *P<0.05. IL-2, interleukin-2; IFN-γ, interferon-γ.
