Cell staining was performed as previously described34 (link). Cells were washed in cold PBS with 2% FCS and 0.1% sodium azide and following stained with fluorescein isothiocyanate (FITC)-, phycoerythrin (PE)-conjugated anti-human monoclonal antibodies which were including anti-CD3/CD16 + CD56 (APC/FITC), NKp46, CD69, CD62L, CD158b, and CD158e (PE) from Becton-Dickinson for flow cytometric analysis. The fluorescent staining was analyzed on a Canto II (BD Biosciences) flow cytometer. Electronic gates were set to enable analysis of the fluorescence of the viable cell population according to FSC/SSC histograms following anti-CD3/ CD16 + CD56 stimulation. The percentage of cells stained with each monoclonal antibody was determined by comparing each histogram with one from control cells stained with FITC- or PE- labeled isotype control monoclonal antibodies.
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