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20 protocols using anti cd127

1

CD4+ T Cell Subpopulation Isolation and Phenotyping

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CD4+ T cells were enriched by magnetic activated cell sorting (MACS) using 20 µl of anti-CD4 MicroBeads (anti-CD4 MicroBeads, human, Miltenyi Biotec, Germany) and 80 µl MACS buffer (PBS with 0.5% BSA and 2 mM ethylenediaminetetraacetic acid) per 107 cells. CD4+ T cells were stained for surface expression in MACS buffer at a concentration of 2 × 108 cells/ml. Cells were washed and stained with 4′,6-diamidino-2-phenylindole (1:250) and then sorted using the flow cytometer BD FACSAria II (BD Biosciences, Germany) into the following CD4+ T-cell subpopulations: Treg (CD25highCD127low) and non-Treg: TN (CD45RA+ CCR7+), TCM (CD45RA-CCR7+), TEM (CD45RA− CCR7−), and TEMRA (CD45RA+ CCR7−).
Antibodies used for surface staining were anti-CCR7 (GO43H7, 1:50), anti-CD25 (M-A251, 1:100), anti-CD45RA (HI100, 1:50), anti-CD127 (A019D5, 1:100), anti-CD3 (UCHT1, 1:200), anti-CD4 (OKT4, 1:200), anti-PD-1 (EH12.2H7, 1:20), anti-TIGIT (A15153G, 1:20), anti-TIM-3 (F38–2E2, 1:20), and LAG-3 (11C3C65, 1:20) from BioLegend, and anti-KLRB1 (191B8, 1:10), anti-KLRF1 (4A4.D10, 1:50), and anti-KLRG1 (REA261, 1:10, 1:50 since 2018/06 due to more concentrated formulation) from Miltenyi Biotec. See also Supplementary Fig. 5 for the pre-gating strategy.
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2

Comprehensive Phenotyping of Human CD4+ T Cells

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Freshly obtained peripheral blood mononuclear cell (PBMC) were stained with anti-CD4 (-FITC from Biolegend, OKT4, USA), anti-CD25 (-PE from Biolegend, BC96, USA), anti-CD127 (-PECY7 from Biolegend, A019D5, USA), anti-CD226 (-APC from Biolegend, 11A8, USA), anti-TIGIT (-APC from eBioscience, MBSA43, USA). Intracellular detection of Foxp3 with anti-Foxp3 (-Percp-Cy5.5 from eBioscience, 236A/E7, USA) and Helios with anti-Helios (-APC from Biolegend, 22F6, USA) was performed on fixed and permeabilized cells via Foxp3 Staining Buffer Set (eBioscience, USA). Cell fluorescence was acquired on BD LSR Fortessa (BD Biosciences, USA) and analyzed with FlowJo software (version 7.6.5; Tree Star). We usually acquired 10, 000 events in FSC. CD4-FITC positive and SSC gates were used to delineate CD4+ cells, then gated with CD25-PE and CD127-PECY7 in these cells, and the acquisition gate was designed on the CD4+CD25highCD127low/− cells.
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3

Glucose Titration in T Cell Activation

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Splenocytes were isolated and prepared as a single-cell suspension. 3×106 WT and 2B4KO OT-I T cells, respectively, were resuspended in 1.5 mL of complete media (glucose-free RPMI-1640 supplemented with 10% FCS, 2 mM L-glutamine), 100 U/mL penicillin, 100 μg/mL streptomycin, 10 mM HEPES, and 0.5 mM 2-mercaptoethanol) in a 24-well flat-bottomed plate at 37°C in a 5% CO2, humidified atmosphere. A D-glucose solution of 200g/L (Gibco by Life Technologies) was titered into the glucose-free complete media and diluted on a half-log scale. Cells were then stimulated with SIINFEKL N4 peptide at 1 nM for 5 days. After 5 days in culture cells were harvested and stained with anti-CD8 (BD Horizon), anti-Thy1.1 (BD Biosciences or BioLegend), anti-CD244 (eBioSciences), anti-Va2 (BD), anti-CD127 (BioLegend), anti-CD62L (BD), anti-KLRG-1, anti-Vb5 (BD), anti-CD44 (BD), 7AAD (BD) and AnnexinV (BioLegend), anti-IL-2 (BD), anti-IFN-g (BD) as described by the manufacturer. As described above, samples were analyzed on an LSRII flow cytometer (BD Biosciences) and data was analyzed using FlowJo 9 software (Treestar, San Carlos, CA) and Prism 6 software (GraphPad Software Inc.).
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4

Multiparameter Flow Cytometry Staining

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Cells were washed in FACS medium (PBS containing 2% FBS), and stained with primary antibodies including anti-human CD14-APC (eBioscience, 61D3, 1:100), anti-human CD4-APC (eBioscience, RPA-T4, 1:100), anti-human CD3-FITC (BioLegend, HIT3a, 1:100), anti-human CD8-PE (BD Pharmingen, 555367, 1:100), anti-human CD69-APC (BioLegend, FN50, 1:100), anti-human CD86-PE (BioLegend, IT2.2, 1:100), anti-CD206-APC (eBioscience, 19.2, 1:100), anti-CD11c (Biolegend, Bu15, 1:100), anti-hLAIR1 (eBioscience, NKTA255, 1:100), anti-CD45 (Biolegend, 2D1, 1:100), anti-CD25 (Biolegend, BC96, 1:100), or anti-CD127 (Biolegend, A019D5, 1:100). Flow data were analyzed by Flowjo software. Propidium iodide (PI) staining was used to exclude dead cells in analysis.
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5

Multiparameter Immune Response Analysis

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Single cell suspensions were obtained from PBMCs, and various tissues as described previously. Dead cells were gated out using Live/Dead fixable dead cell stain (Invitrogen). SARS-CoV-2 spike and SF162 peptide pools used for intracellular cytokine staining (ICS) and these were obtained from BEI Resources. Biotinylated MHC class I monomers (KbVL8, sequence VNFNFNGL; DbGP33, sequence KAVYNFATC; DbGP276, sequence SGVENPGGYCL; OVA, sequence SIINFEKL; KbB8R, sequence TSYKFESV) were used for detecting virus-specific CD8 T cells, and were obtained from the NIH tetramer facility at Emory University. Cells were stained with fluorescently-labeled antibodies against CD8α (53–6.7 on PerCP-Cy5.5), CD44 (IM7 on FITC), CD62L (MEL-14 on PE-Cy7), CD127 (A7R34 on Pacific Blue), and tetramers (APC). TNFα (MP6-XT22 on PE-Cy7), IFNγ (XMG1.2 on APC), or Ki67 (SolA15 on PE-Cy7). Fluorescently-labeled antibodies were purchased from BD Pharmingen, except for antiCD127 and anti-CD44 (which were from Biolegend). Flow cytometry samples were acquired with a Becton Dickinson Canto II or an LSRII and analyzed using FlowJo v10 (Treestar).
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6

Comprehensive Phenotyping of Human CD4+ T Cells

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Freshly obtained peripheral blood mononuclear cell (PBMC) were stained with anti-CD4 (-FITC from Biolegend, OKT4, USA), anti-CD25 (-PE from Biolegend, BC96, USA), anti-CD127 (-PECY7 from Biolegend, A019D5, USA), anti-CD226 (-APC from Biolegend, 11A8, USA), anti-TIGIT (-APC from eBioscience, MBSA43, USA). Intracellular detection of Foxp3 with anti-Foxp3 (-Percp-Cy5.5 from eBioscience, 236A/E7, USA) and Helios with anti-Helios (-APC from Biolegend, 22F6, USA) was performed on fixed and permeabilized cells via Foxp3 Staining Buffer Set (eBioscience, USA). Cell fluorescence was acquired on BD LSR Fortessa (BD Biosciences, USA) and analyzed with FlowJo software (version 7.6.5; Tree Star). We usually acquired 10, 000 events in FSC. CD4-FITC positive and SSC gates were used to delineate CD4+ cells, then gated with CD25-PE and CD127-PECY7 in these cells, and the acquisition gate was designed on the CD4+CD25highCD127low/− cells.
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7

Multicolor Flow Cytometry Analysis

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The procedures used in this experiment have been published previously [25 (link),26 (link)]. Immune cells were evaluated in each experiment and treated with FcR blocking reagent (Miltenyi Biotec, Bergisch Gladbach, Germany), stained with fluorescence-labeled antibodies as indicated, and incubated for 20 min at 4 °C in phosphate buffered saline (PBS) containing 0.1% bovine serum albumin. The following mouse antibodies were purchased from BioLegend (San Diego, CA, USA): anti-CD3 (labeled with FITC, PE, and APC-Cy7), anti-CD4 (PE), anti-CD8 (FITC and APC-Cy7), anti-CD11b (APC-Cy7), anti-CD11c (BV421), anti-CD40 (APC), anti-CD44 (PE), anti-CD45 (PerCP-Cy5.5), anti-CD45.1 (Pacific Blue), anti-CD45.2 (Pacific Blue), anti-CD62L (PerCP), anti-CD69 (PE), anti-CD80 (PerCP-Cy5.5), anti-CD86 (PE), anti-CD103 (PE-Cy7), anti-CD127 (BV510), and anti-NK1.1 (PerCP-Cy5.5.). We also used 7-AAD (BioLegend) to stain dead cells for the evaluation of cell viability. The stained cells were subjected to FACS Verse for data acquisition (Becton Dickinson, San Jose, CA, USA) and analyzed using FlowJo software (Tree Star, Ashland, OR, USA).
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8

Lung and Tumor Immune Cell Isolation

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Lymphocytes were isolated from lung and tumor tissue by digestion with collagenase A (1 mg/ml; Roche) and DNase I (0.5 µg/ml; Roche) in isolation buffer (RPMI 1640 supplemented with 5% FBS, 1% l-glutamine, 1% penicillin-streptomycin, and 10 mM Hepes) for 30 min at 37°C. Cells were filtered through 100-µm cell strainers, washed in isolation buffer, and stained in PBS supplemented with 0.25% BSA, 2 mM EDTA, and 0.1% sodium azide. Antibodies used included anti-CD45, anti-Foxp3, anti–IL-18Rα, anti-ST2, anti-CD62L, anti-CD103, anti–PD-1, anti-GITR, anti–CTLA-4, anti-KLRG1, anti-Ki67, anti-CD5, anti-NK1.1, anti-CD45R (B220), anti–IL-17, anti–IL-4, anti-IFNγ, and anti–Ly-6C (eBioscience); anti-TCRβ, anti-CD3, anti-CD4, anti-CD8, anti-CD127, anti-CD11B, anti-MHCII, and anti-Gr1 (BioLegend); anti-CD44 and anti-CD25 (Tonbo); anti–IL-5 and anti-TNFα (BD PharMingen); and anti-AREG (R&D Systems). For exclusion of dead cells, samples were first stained with Ghost Dye (Tonbo) cell viability reagent. Intracellular staining for cytokines, Foxp3, AREG, Ki-67, and CTLA-4 was performed using the Foxp3/transcription factor staining buffer set (eBioscience) as per manufacturer’s protocol. The H2-Kb OVA257–264 tetramer was obtained from the NIH Tetramer Core Facility.
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9

Comprehensive Immune Cell Phenotyping

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Cells were pre-incubated with 1 µg/ml of FcR blocker [Miltenyi-Biotech]. For intracellular cytokine staining, cells were first stimulated with PMA [0.1 µg/ml] and ionomycin [1 µg/ml] in the presence of Brefeldin A [3 µg/ml] for 4 h at 37°C before being surface-stained, fixed, and permeabilised [eBioscience kit]. The following antibodies were used for flow cytometry staining: intracellular staining panel including anti-CD45, anti-CD3, anti-CD8, anti-IL-17A, anti-IL-22, anti-TNF-α [all from Biolegend], and anti-IFN-γ [eBioscience] antibodies; CCR panel including anti-CXCR3 and anti-CCR4 [BD Biosciences], anti-CCR6 and anti-β7 [Biolegend], anti-CCR9 [eBioscience] and anti-CCR10 [R&D Systems] antibodies; ILC panel including anti-lineage [CD34, TCRαβ, TCRγδ, BDCA-2, FCεR1a, CD123, CD1a, CD11c, CD14, CD3, CD19, CD16], anti-CD45, anti-c-Kit, anti-CRTH2, anti-CD127 [all from Biolegend], anti-CD56 and anti-CD94 [BD Pharmingen]. All antibody cocktails contained a fluorescent dye [Invitrogen/Life technologies] to discriminate dead cells during analysis. Stained cells were acquired on an LSRII flow cytometer and analysis was performed using FlowJo software [Tree Star]. For critical discrimination, cell populations were gated against corresponding isotype or fluorescence minus one [FMO] control antibody panels.
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10

Multiparameter Flow Cytometry of Esophageal Immune Cells

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Human fluorochrome-conjugated antibodies, anti-CD127, anti-CD4, anti-CD3, anti-CD11c, anti-Siglec-8, anti-IL17A, anti-IFNγ, anti-TNF-α, anti-IL22, anti-FOXP3, anti-IL10 all were purchased from BioLegend. Additional anti-human CD3 and anti-human CD4 were used from BD Biosciences. Anti-human IL-22BP antibody (clone 87554) and IgG2B isotype control were obtained from R&D Systems. To identify dead cells, 7-AAD staining (BioLegend) was performed. For extracellular staining, isolated hematopoietic cells from esophageal tissues were incubated for 20 min at 4 °C. Cells were acquired on a LSRII Fortessa flow cytometer (BD). Data were analyzed with FlowJo software (Treestar).
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