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3 protocols using anti b220 pacific blue

1

Analysis of Immune Cell Subsets

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For the analysis of cell surface markers, single-cell suspensions from the spleens were prepared 1 week after the last dose of DMBA. Cells were permeabilized by 0.5% (w/v) saponin in PBS (containing 0.25% (w/v) bovine serum albumin and 0.02% (w/v) sodium azide). Splenocytes (macrophages, B cells, CD4+ T cells and CD8+ T cells) were analyzed by staining with an antibody solution containing anti-CD11b-Alexa Fluor 700, anti-B220-Pacific Blue, anti-CD4-Dye647 and anti-CD8-PE/Cy7 (all obtained from eBioscience, Frankfurt, Germany). Tregs were analyzed by staining with anti-CD4-APC/Cy7 and anti-CD25-Dye647 and subsequent incubation with FoxP3 Fixation/Permeabilization working solution (all obtained from eBioscience). Then cells were stained with anti-FoxP3-FITC (eBioscience). All samples were measured using the flow cytometer BD LSR II (BD Biosciences, San Jose, CA, USA).
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2

Multicolor Flow Cytometry Antibody Panel

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The following monoclonal antibodies were used for murine FACS stainings: From BioLegend (San Diego, CA): anti-CD4 Biotin (GK1.5, 1:400), anti-CD8a Pacific Blue (53-6.7; 1:300), anti-CD11b Pacific Blue (M1/70, 1:300), anti-CD11c Brilliant Violett 421 (N418, 1:400), anti-B220 Pacific Blue (RA3-6B2, 1:300), anti-F4/80 Pacific Blue (BM8, 1:400), anti-CD25 PerCP-Cy5.5 (PC61, 1:200), anti-CD44 PE (IM7, 1:800, 1:3000 for analysis with ≤1,000 cells per well), anti-Ki67 APC (16A8, 1:400); anti-Ki67 Brilliant Violett 605 (16A8, 1:400), anti-CD90.1 PerCP-Cy5.5 (OX-7, 1:500), anti-CD90.2 APC-Cy7 (30-H12, 1:500); from eBioscience (San Diego, CA): anti-CD4 Alexa Fluor 700 (RM4-5; 1:200; 1:600 for analysis with ≤1,000 cells), anti-CD62L APC (MEL-14, 1:400), anti-Foxp3 FITC (FJK-16s, 1:200), polyclonal donkey anti-rabbit IgG PE (1:2000); from BD Biosciences: anti-CD14 V450 (rmC5-3, 1:400). Unspecific binding of antibodies was prevented by incubation of cell suspensions with Fc-Block (BD Pharmingen, 2.4G2, 1:100) for 10 min on ice, followed by flow cytometric staining for 30 min on ice in the dark. Cells were passed through a 40 μm cell strainer (NeoLab) to remove large debris. Enumeration of cells and acquisition were performed by using FACSAriaIII and FACSDiva software (BD version 6.1.3). Single-cell data analyses were performed by the use of the FlowJo software 7.6.1 (Tree Star Inc., OR).
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3

B Cell Characterization by Flow Cytometry

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Cells were stained for surface antigens using anti-B220-PacificBlue, anti-IgM-FITC, anti-CD43-APC (all from eBioscience, San Diego, CA). Then, a fixation/permeabilization procedure was performed using the Foxp3 Staining Buffer Set (eBioscience) according to the manufacturer’s protocol, followed by staining with anti-TdT-PE (19−3; eBioscience). Cells were analysed with an LSR II flow cytometer with FlowJo (TreeStar Inc., Ashland, OR, USA) software.
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