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3 protocols using anti cd80

1

Flow Cytometric Analysis of B-Cell Phenotype

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Cells were stained to verify the purity of isolated B cells or to define B-cell phenotype by using anti-CD38, anti-CD24, anti-CD27, anti-CD71, anti-CD80, anti-CD86, anti-CD20 (Beckman Coulter, Brea, CA, USA), PD-1 (Miltenyi Biotech), PD-L1 and anti-TIM-1 (eBiosciences) antibodies. For intracellular labelling of IL-10 (Miltenyi Biotech), the B-cell cultures were supplemented with Phorbol 12-myristate 13-acetate (PMA; 10 ng/mL) + Ionomycin (0.25 µg/mL, both from Sigma Aldrich) during 5 h and GolgiStop (BDbiosciences; Franklin Lakes, NJ, USA) during the last 4 h of incubation. Then, cells were washed, surface-stained, stained for viable cells with Fixable Viability Dye eFluor450 (eBiosciences), fixed/permeabilised (Cytofix/Cytoperm, BDbiosciences) and stained for intracellular IL-10. Cells were then analysed by flow cytometry using a Gallios cytometer (Beckman Coulter), and data were analysed using the Kaluza software (Beckman Coulter).
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2

Multiparametric Flow Cytometry Analysis

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Surface phenotypes were determined using an Epics XL MCL (Beckman Coulter, Brea, CA, USA). The following monoclonal antibodies (mAbs) were purchased from Beckman Coulter: anti‐CD3, anti‐CD4, anti‐CD8, anti‐Vγ9TCR, anti‐CD14, anti‐CD25, anti‐CD45, anti‐CD54, anti‐CD56, anti‐HLA‐DR, anti‐CD40, anti‐CD80, anti‐CD86, anti‐CD11c, anti‐CD36, mouse immunoglobulin (Ig)G1, mouse IgG2 and mouse IgG2b mAbs. Anti‐HLA‐class 1 and anti‐CCR7 mAbs were purchased from Beckton Dickinson (San Jose, CA, USA) and R&D Systems (Minneapolis, MN, USA), respectively. Anti‐TCR Vα24TCR and anti‐TCR Vβ11 mAbs were purchased from Beckman Coulter (Villepinte, France). Anti‐human CD273 (PD‐L2) and CD274 (PD‐L1) mAbs were purchased form eBioscience (San Diego, CA, USA). Anti‐human CD152 (CTLA‐4) and CD279 (PD‐1) mAbs were purchased from BioLegend (San Diego, CA, USA). Anti‐FoxP3 mAb for intracellular staining was purchased from BD Biosciences (Tokyo, Japan). All mAbs were conjugated with fluorescein isothiocyanate (FITC), phycoerythrin (PE), antigen‐presenting cells (APC), extracellular domain (ECD), proprotein convertase (PC)5 or PC7. Z was purchased from Novartis Pharmaceuticals (Basel, Switzerland) and G from Funakoshi Co. Ltd (Tokyo, Japan).
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3

Isolation and Phenotypic Analysis of Tumor-Infiltrating Dendritic Cells

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Splenocytes were isolated at 48 hours after the last administration of polyplex micelles to subcutaneous tumor models. The cells were then subjected to flow cytometric analysis using PE-conjugated anti-CD11c (Miltenyi Biotec Gmbh, Bergisch Gladbach, Germany), FITC-conjugated anti-CD11b (Abcam), anti-CD80, anti-CD86 (Beckman Coulter, Fullerton, CA), and anti-MHC-Class II (Miltenyi Biotec Gmbh) monoclonal antibodies.
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