The cells were dispersed into a single-cell suspension and resuspended in staining buffer (BD, New Jersey, USA) while T cells (Jurkat) were treated with PE-CD3 (130-117-139, 1 : 50, Miltenyi Biotec, Bergisch Gladbach, Germany), fixed, permeabilized, and stained with Pacific blue-IFN-γ (BioLegend, San Diego, CA, #505817, rat, 1 : 50), followed by detection utilizing flow cytometer BD FACS Canto II (Immunocytometry Systems, BD, New Jersey). Acquired data were analyzed by the Flow Jo software [21 (link)].
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