Anti cd23 pe cy7

Flow cytometric analysis of B cell populations was performed using our previously described gating strategies8 (link)15 (link)16 (link)17 (link). Following red cell lysis, cells were counted and stained with a cocktail of antibodies for the detection of the indicated populations using anti-CD19-AF700, anti-CD23-PE/Cy7, anti-CD21-E450, anti-CD43-PE/Cy7, anti-GL7-FITC, anti-CD138-PE, anti-B220-E450, anti-B220-APC, anti-IL-10-APC, anti-CD3-FITC, anti-CD4-PerCP and anti-CD8-PE/Cy7 antibodies from eBioscience and Biolegend. Plasma cells were phenotyped as (Dump (CD3, CD4, CD8, CD11b, GR1 & CD11c)⁻ CD138⁺CD19⁻B220⁻) with the Dump⁺ markers identified using biotinylated antibodies and svPE. Alternatively, splenocytes were stimulated with 50 ng/ml PMA (Sigma-Aldrich, UK) plus 500 ng/ml ionomycin (Sigma-Aldrich, UK) and 10 μg/ml LPS (E. coli O111:B4, Sigma-Aldrich, UK) for 1 h before addition of 10 μg/ml Brefeldin A (Sigma-Aldrich, UK) and cells were then incubated for a further 5 h at 37 °C with 5% CO₂. Cells were fixed and washed several times in permeabilization buffer before anti-IL-10 was added in permeabilization buffer and incubated at 4 °C for 30 minutes. Cells were then washed three times with permeabilization buffer and finally with FACs staining buffer before data were acquired using a BD LSR II flow cytometer and analysis undertaken by FlowJo software (TreeStar).

C57BL/6 (WT) mice were purchased from The Jackson Laboratories (Bar Harbor, ME).
Cd244^-/- mice on the C57BL/6 background [12 (link)], were kindly provided by Dr. Raymond Welsh (University of Massachusetts Medical Center, Worcester, MA). Mice were maintained in the Translational Biomedical Research Center of the Medical College of Wisconsin and both genders were used for experiments in an age (6–12 week) and gender-matched manner. anti-CD45R-PE-Texas Red, anti-CD45R-PE, anti-GL7-FITC and anti-CD5-APC were purchased from BD Biosciences (San Jose, CA). CD21-eFluor 450, anti-CD23-PE-Cy7, anti-CD93-biotin, anti-CD4-APC-eFluor 780, anti-CD8-PE-Cy7, anti-TCRβ-FITC, anti-TCRβ-PE, anti-CD11b-Alexa Fluor 488, anti-CD244, anti-Foxp3-PE, anti-CD19-Alexa 700, anti-CD4-PE, anti-IgG-FITC and Streptavidin PE-Cy5.5 were purchased from eBioscience (San Diego, CA). Anti-CD11b-Brilliant Violet 605, anti-CD11c-PE, anti-NK1.1-APC, anti-IgM-APC Cy7, anti-IgD-Pacific Blue, anti-CD38-Alexa Fluor 647, anti-CD138-APC and rat anti-mouse IgG_2a-biotin were purchased from Biolegend (San Diego, CA). Anti-IgM-FITC and the SBA Clonotyping System-B6/C57J-HRP were purchased from Southern Biotech (Birmingham, AL). 4-Hydroxy-3-nitrophenylacetyl (NP)-ficoll, NP-Chicken Gamma Globulin (CGG), NP(24)-PE and NP-BSA were purchased from Biosearch Technologies (Novato, CA).