cytometry analysis using the following antibodies: FITC-conjugated
anti-mouse CD19 (clone 1D3) (BD Biosciences, San Diego, CA, USA),
FITC-conjugated anti-mouse CD4 (clone GK1.5) and IgM (clone RMM-1)
(BioLegend, San Diego, CA, USA), FITC-conjugated anti-mouse CD11c
(clone N418), (eBioscience, San Diego, CA, USA), PE-conjugated
anti-mouse CD8a (clone 53-6.7) and CD49b (clone DX5) (eBiosciences),
PE-conjugated anti-mouse IgA (clone 11-44-2) and MHC class II (clone
NIMR-4) (eBioscience), and PE-Cy5-conjugated anti-mouse CD3e (clone
145-2C11) (eBioscience). Stained samples were analyzed using a BD
FACSCanto II instrument and the BD FACSDiva version 6.1.3 software
(BD Biosciences).