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4 protocols using anti pd 1 eh12

1

Comprehensive Immunological Antibody Panel

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The following antibodies were used in this study: anti-B7-H3 (FM276, Miltenyi Biotech), anti-GD2 (14.G2a, BD Biosciences), human Ig (polyclonal, Thermo Fisher Scientific), anti-mouse IgG (polyclonal, R&D), anti-CD3 (UCHT1, BioLegend), anti-HisTag (J095G45, BioLegend), anti-CD34 (QBEnd10, R&D), anti-ab-TCR (IP26, BioLegend), anti-CD107a (H4A3, BioLegend), anti-cD25 (BC96, BioLegend), anti-CD69 (FN50, BioLegend), anti-Tim3 (F38-2E2, BioLegend), anti-Lag3 (11C3C65, BioLegend), anti-PD-1 (EH12.1, BD Biosciences), anti-mouse CD45 (30-F11, BioLegend), anti-human CD45 (HI30, BioLegend), Ghost Red 780 (Tonbo Biosciences), Zombie Yellow Viability Dye (BioLegend), propidium iodide (Gibco), Cell Trace Violet (Thermo Fisher Scientific), and Precision Count Beads (BioLegend).
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2

Multiparameter Immune Profiling of Cells

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Cells were stained with LIVE/DEAD Fixable Near-IR Dead Cell Stain kit (Invitrogen) and surface antibodies for 30 min at 4 °C. For intracellular cytokine staining, cells were treated with 50 nM phorbol-12-myristate-13-acetate (MilliporeSigma) and 250 nM ionomycin (MilliporeSigma) for 4 hours in the presence of Brefeldin A (BD Biosciences) before harvesting. Cells were washed and fixed with BD Cytofix™ Fixation Buffer (BD Biosciences) for 10 min at RT, then washed with PBS. Intracellular cytokines were stained in permeabilization buffer (eBioscience) for 30 min at 4 °C. The following antibodies were used: anti-LAG-3 (11C3C65, BioLegend), anti-PD-1 (EH12.1, BD Biosciences), anti-TIGIT (MBSA43, eBioscience), anti-Tim-3 (F38–2E2, Biolegend), anti-IFN-γ (4S.B3, eBioscience), and IL-10 (JES3–9D7, Biolegend). Cells were acquired on a BD Fortessa flow cytometer and data was analyzed with FlowJo software v10 (Threestar).
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3

Phenotypic Profiling of Immune Cells

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Cells were stained with LIVE/DEAD Fixable Near-IR Dead Cell Stain kit (Invitrogen) and surface antibodies for 30 min at 4 °C. For intracellular cytokine staining, cells were treated with 50 nM phorbol-12-myristate-13-acetate (MilliporeSigma) and 250 nM ionomycin (MilliporeSigma) for 4 hours in the presence of Brefeldin A (BD Biosciences) before harvesting. Cells were washed and fixed with BD Cytofix™ Fixation Buffer (BD Biosciences) for 10 min at RT, then washed with PBS. Intracellular cytokines were stained in permeabilization buffer (eBioscience) for 30 min at 4 °C. The following antibodies were used: anti-LAG-3 (11C3C65, BioLegend), anti-PD-1 (EH12.1, BD Biosciences), anti-TIGIT (MBSA43, eBioscience), anti-Tim-3 (F38-2E2, Biolegend), anti-IFN-γ (4S.B3, eBioscience), and IL-10 (JES3-9D7, Biolegend). Cells were acquired on a BD Fortessa flow cytometer and data was analyzed with FlowJo software v10 (Threestar).
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4

Isolation and Analysis of Tumor-Infiltrating Lymphocytes

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Tumors were excised from mice and minced finely using a scalpel blade. Minced tumors were placed in 5 ml of RPMI 1640:DMEM media (1:1), containing collagenase type 4 (1 mg/ml, Sigma St Louis, MO, USA) and DNase I (20 μg/ml, Roche, Basel, Switzerland). Tumors were digested at 37 °C for 45 min, rotating and rolling gently using a MACSmix Tube rotator (Miltenyi Biotec, Germany). Tumor suspensions were then passed through a 40-μm cell strainer and washed twice in RPMI 1640 complete media. Isolated TILs were then stained with anti-CD45 (30-F11), anti-CD11b (M1/70), anti-CD8 (53-6.7), anti-CD4 (RM4-5), anti-NK1.1 (PK136), anti-PD1 (EH12.1) and anti-TIM3 (5D12) (all BD Pharmingen, San Diego, CA, USA). TILs were analyzed by flow cytometry using a FACS Canto instrument or Fortessa (BD Biosciences, Franklin Lakes, NJ, USA).
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