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4 protocols using anti ki67 fitc b56

1

Multiparameter Flow Cytometry Assay

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Flow cytometry was performed as described previously (6 (link)). Isolated cells were incubated with predetermined optimized concentrations of anti-CD3-Alexa fluor 700 (clone SP34-2, BD Pharmingen), anti-CD8-Pacific Blue or PE-CF594 (clone RPA-T8, BD Pharmingen), anti-CD20-APC-Cy7 (clone L27, BD Pharmingen), anti-CXCR5-phycoerythrin (PE) (Clone MU5UBEE, eBioscience), anti-CD200-APC (clone OX104, eBioscience), anti-CD4-PerCP (clone L200, BD Pharmingen), anti-CD95-PE-Cy5 (clone DX2, BD Pharmingen), anti-CCR7-APC-Cy7 (clone 3D12, Biolegend), anti-PD-1-PE-Cy7 (clone EH12.2H7, Biolegend), anti-ICOS-Pacific Blue (C398.4A, Biolegend) and Live/Dead dye-Alexa430 (Invitrogen). After staining the cell surface, cells were permeabilized and fixed by BD perm wash (BD Pharmingen) and washed twice. Finally, cells were incubated with anti-Ki67-FITC (B56, BD Pharmingen), washed twice and diluted in 1% PFA. Data were acquired on a LSRII flow cytometer (BD Biosciences) and the data analyzed using FlowJo software (version 9.2 Tree Star).
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2

Intracellular Cytokine Analysis of Activated T Cells

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For intracellular cytokine analysis, single cell suspensions (0.5-1 million cells per well) were stimulated in 24 well plates with complete RPMI containing 20 nM phorbol myristate acetate (PMA; Sigma-Aldrich) and 1μg/ml ionomycin (Sigma-Aldrich), at 37°C for 4 hours. After 1 hour of incubation, 1μl/ml of GolgiStop (containing monensin; BD Biosciences) was added to each well. Surface stained cells were stained for intracellular antigen following Fixation/Permeabilisation (Foxp3-staining kit, eBiosciences). Intracellular antibodies consisted of anti-Ki67-FITC (B56; BD Bioscience) or anti-Ki67-BrilliantViolet 421 (16A8; BioLegend), anti-IL-2-PE (JES6-5H4; eBioscience), anti-Foxp3-PE-Cy7 (FJK-16s; eBioscience), and anti-T-bet-PerCPCy5.5 (eBio4B10; eBioscience). For flow cytometric analysis, samples were acquired on a FACS Canto II flow cytometer (BD Biosciences), and were subsequently analysed using FlowJo software.
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3

Annexin-V and Ki67 Staining Assay

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For analysis of cell death, LP cells and IELs were washed with annexin-binding buffer (10 mM HEPES, 140 mM NaCl, 2.5 mM CaCl2, pH 7.4) and incubated with fluorochrome-conjugated annexin-V and 7-AAD Viablity Staining Solution (eBioscience) for 15 min at room temperature. For analysis of cell proliferation, cells were surface-labelled with the appropriate conjugated Abs, fixed, permeabilized using Foxp3 Staining Buffer Set (eBioscience) and subsequently incubated with anti-Ki67-FITC (B56; BD Biosciences) for 30 min. After washing, cells were analysed on a FACSAria II.
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4

Multiparametric Flow Cytometry Analysis

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Cells were stained using fluorophore-conjugated antibodies purchased from either eBiosciences, Biolegend, BD Pharmingen, or WEHI Monoclonal Antibody Production Facility. For lineage depletion, BM cells were stained with biotinylated anti-CD2, CD3, Thy1.2, Gr1, Ter119, B220, CD19, and Mac1 and depleted using MACS LS columns (Miltenyi Biotec). To distinguish apoptotic/necrotic cells in stained samples, FITC Annexin V and propidium iodide (final concentration of 2.5 μg/ml) were added 1–10 min prior to acquiring the data. For cell cycle analysis, cells were fixed and permeabilized using Cytofix/Cytoperm (BD Pharmingen) and then stained with anti-Ki67 FITC (B56; BD) and 10 µg/ml DAPI. TCR Vß-subfamily usage was assessed using the Mouse Vß TCR Screening Panel (BD Pharmingen). Cells were analyzed on an LSR Fortessa or FACSymphony A3 (BD) and sorted on a FACS Aria II (BD). Data were analyzed using FlowJo (Treestar; version 9.9.5).
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