After isolation and re-stimulation, the splenocytes were collected, washed and immunophenotyped by using the following anti-mouse mAbs: CD3-eFluor 450, CD4-FITC (Thermo Fisher Scientific), and CD8a-APC-H7 (BD Biosciences). Appropriate isotype controls were used for comparison. After staining, the splenocytes were assessed by BD FACSAria™ II Flow Cytometer (BD Biosciences, San Jose, CA, USA). Dead cells were excluded by using LIVE/DEAD Fixable Dead Cell Stain (Invitrogen). Antigen specific CD4+ or CD8+ T cells were analyzed with FlowJo software (Tree Star Inc., Ashland, OR) [43 (link)]. All experiments were performed in triplicate.
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