Lymphocytes at a concentration of 2 × 106 cells/mL were incubated with 50 µL of stimuli at 100 ng/mL and with 5µL of Fluo-3 AM solution at 1 mM (Sigma, St. Louis, MO, USA) for 2 h at 37 °C [6 (link),7 (link),62 (link)]. Cells were washed and resuspended in Hank’s Balanced Salt Solution (HBSS) with bovine serum albumin (BSA). Fluoroskan Ascent FL® was used to measure fluorescence intensity with 485 nm excitation and 538 nm emission filters, and the results were described according to fluorescence intensity.
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