Single-cell mouse splenocyte suspensions were prepared 2 weeks after the final immunization. For CD49dhighCD11ahigh CD4+ T cell detection, splenocytes were incubated with anti-mouse CD4-APC/Cy7 (Biolegend, USA), anti-mouse CD49d-FITC (Biolegend, USA), and anti-mouse CD11a-PE (Biolegend, USA). To detect CD8αlowCD11ahigh T cells, cells were incubated with anti-mouse CD8α-PerCP5.5 (Biolegend, USA) and anti-mouse CD11a-PE (Biolegend, USA). Fluorescence-activated cell sorting (FACS) was performed on a FACSCalibur flow cytometer (BD Biosciences) and data were analyzed using CellQuest Pro (BD Biosciences) software.
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