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A GFP-transfected HFWT cell line, GHINK-1, as a novel target for non-RI activated natural killer cytotoxicityassay.

Authors:Harada H, Saijo K, Ishiwata I, Ohno T.

Journal:Hum Cell. 2004 Mar;17(1):43-8.

Abstract:An anchorage-dependent Wilms’ tumor cell line, HFWT, has been found to be extremely susceptible to human natural killer (NK) cells. Here we established a transfectant of HFWT with the green fluorescence protein (GFP) gene, designated GHINK-1 cells, to apply to the activated NKcytotoxicity assay without radioisotope labeling. After being co-cultured with CD3 CD56+ NK cells, GHINK-1 cells released GFP into the medium. The intensity of the fluorescence from the released GFP correlated almost exactly with the radioactivity of a standard 51Cr-release assay performed with suspension-cultured K562 cells. Because it does not require separation of the remaining live target cells by centrifugation, the non-radioisotopic GFP release assay with GHINK-1 cells is a convenient alternative for monitoring human activated NK killing activity.