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3 protocols using anti cd25 clone 3c7

1

Multi-color Flow Cytometry Protocol

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Multi-color flow cytometry was performed using a BD FACS Canto II (BD bioscience, Germany). Single cell suspensions were obtained from spleen, lymph nodes, lung, blood and tumor and were stained with following antibodies: anti-CD3e-APC (clone 145–2C11, Biolegend), anti-CD4-APC/Cy7 (clone GK1.5, Biolegend), anti-CD8-PerCP (clone 53–6.7, Biolegend), anti-CD25 (clone 3C7, Biolegend), anti-IFNγ-FITC (clone XMG1.2, Biolegend), anti-mouse CD45.1 (APC, Clone A20, eBioscience), anti-mouse CD90.1-PeCy7 (clone OX7, Biolegend), anti-FOXP3-Pacific BlueTM (clone MF-14, Biolegend) and anti-CCR4-PE/Cy7 (clone 2G12, Biolegend). For isolating tumor-infiltrating lymphocytes, tumors were mechanically disrupted, incubated with 1 mg/mL collagenase and 0.05 mg/mL DNAse (both from Sigma Aldrich) and passed through a cell strainer. Single cell suspensions were layered on a gradient of 44% Percoll (Biochrome, Berlin, Germany) and 67% Percoll prior to centrifugation at 800 g for 30 min. Lymphocytes were obtained from the interphase, were washed with PBS and used for flow cytometry analysis.
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2

Flow Cytometry Immunophenotyping Protocol

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We used the following BioLegend antibodies: anti-CD3 (clones 17A2 and HIT3a) Pacific-blue, FITC, PE, or APC; anti-CD4 (clones GK1.5 and A161A1) FITC, PE, PerCP-Cy5, PE/Cy7, or APC; anti-CD8 (clone 53-6.7) FITC, APC/Cy7, or APC; anti-CD44 (clone IM7) FITC; anti-CD62L (clone MEL-14) APC; anti-CD25 (clone 3C7) APC; anti-CD69 (clones H1.2F3 and FN50) FITC or PE; anti-CD197 or -CCR7 (clone 4B12) PE/Cy7; anti–IFN-γ (clones XMG1.2 and 4S.B3) APC or PE; anti–IL-12 (clone C15.6) PerCP/Cy5.5; anti–IL-17 (clone TC11-18H10.1) PE-Cy-7; anti–IL-2 (clone JES6-5H4) FITC; anti–TNF-α (clone MP6-XT22) PE or PerCP/Cy5.5; and anti–TGF-β (clone TW7-16B4) APC. Brefeldin A Solution (1000×), Monensin Solution (1000×) (catalog 420701), and Intracellular Staining Permeabilization Wash Buffer (10×) were purchased from BioLegend.
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3

Multiparametric Flow Cytometry Analysis of Murine Splenocytes

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Single-cell suspensions from spleen of mice were stained with anti-CD4 (clone GK1.5; BioLegend), anti-CD25 (clone 3C7; BioLegend), and anti-FoxP3 (clone MF-14; BioLegend). In the case of intracellular cytokine staining, splenocytes were cultured in RPMI 1640 medium containing 10% fetal calf serum, 2 mM L-glutamine, 100 U/ml penicillin, and 100 U/ml streptomycin in presence of phorbol-12-myristate-13-acetate (PMA) (50 ng/ml; Sigma), ionomycin (1 μg/ml; Sigma), and monensin (BioLegend) for 5 h. Cells were washed, fixed, permeabilized, and stained with anti-IL-17 (clone TC11-18H10.1; BioLegend). Viable single cells were analyzed based on forward and side light scatter properties with a CyFlow Cube 6 flow cytometer (Sysmex) or MACSQuant Analyzer 10 flow cytometer (Miltenyi Biotec).
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