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4 protocols using cd28 bv711

1

Multiparametric Flow Cytometry of PBMCs

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PBMCs were incubated with directly conjugated antibodies for 30 min at 4°C. The cells were washed before flow cytometry analysis. Antibodies used included anti-human CD3-BV786, CD4-APC-Fire750, CD8-BV510, CD45RA-AF700, CD70-PE, PD-1-BV711, 2B4-FITC, CD160-AF488, TIM-3-BV650, CD95-PE-CY7 (BD Biosciences, San Diego, CA, USA), CCR7-BV421, HLA-DR-AF700, CD38-BV421, CD28-BV711, CD27-BV650 (BioLegend, San Diego, CA, USA), TIGIT-PE-Cy7, LAG-3-APC (Ebioscience, San Diego, CA, USA) and the corresponding isotype controls. Data acquisition was performed on an LSR Fortessa flow cytometer (BD Biosciences), and data was analyzed with FlowJo software (Tree Star, Ashland, OR, USA).
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2

Comprehensive Immunophenotyping of PBMC

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To immunophenotype cell populations, PBMC were thawed, washed, split into two panels, and stained for 10 min in the dark at room temperature with antibodies against the following human surface markers: CD3 Percp.Cy5.5 (BD-Biosciences, San Jose, CA, USA), CD4, CD8-FITC, CD45RO-APC, CD197-AlexaFluor-700, CD38-BV510, HLA-DR-PE.Cy7, CD28-BV711, CD27 PE-Dazzle-594, CD57-APC, and CD107a BV421(Biolegend, San Diego, CA, USA). The cells were fixed using Perm/fix (BD-Biosciences, San Jose, CA, USA) for 20 min at 4 °C in the dark, and then stained for intracellular Ki67 (Biolegend, San Diego, CA, USA) or IFN-γ (Biolegend, San Diego, CA, USA). Raw data were quantified by FACSAria (BD-Biosciences, San Jose, CA, USA) and analyzed with FlowJo version-10.
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3

Phenotypic Profiling of Cryopreserved PBMCs

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Cryopreserved PBMCs were thawed, as described above. A total of 1 × 106 live PBMCs were labeled with peptide-MHC class I Pentamer-PE (ProImmune) and incubated for 15 min at 37 °C. Dead cells were first labeled with LIVE/DEAD Fixable Aqua dye (Invitrogen) and then with the surface markers CD3-BUV395, CD8-PerCP.Cy5.5, CD14-BV510, CD16-BV510, CD19-BV510, CD28-BV711, CD27-APC-R700, CD45RA-APC-H7 and CCR7-PE-Dazzel 594 (BioLegend). All reagents were from BD Biosciences unless otherwise stated. All samples were acquired on a BD LSRFortessa (BD Biosciences) flow cytometer and analyzed using FlowJo version 10 software.
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4

Comprehensive Immune Phenotyping of PBMCs

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PBMCs from healthy subjects were resuspended in PBS buffer and were incubated with directly conjugated antibodies for 30 min at 4°C. The cells were washed with 1× PBS before flow cytometry analysis. Antibodies used included anti-human CD3-BV786 or CD3-BUV737, CD8-BV510 or CD8-BUV395, CD160-AF488, CD45RA-AF700, CD28-APC, CD95-PE, CD57-BV421, PD-1-BV711, TIM-3-BV650 (BD Biosciences, San Diego, CA, USA), CD4-APC-Fire750, CD244-PE-D594, CCR7-BV421, HLA-DR-AF700, CD38-BV421, CD28-BV711, CD27-BV650, KLRG-1-APC-Fire750, CD95-PE-CY7 (BioLegend, San Diego, CA, USA), TIGIT-PE-Cy7, LAG-3-APC (Ebioscience, San Diego, CA, USA) and the corresponding isotype controls. Data were acquired with the LSR Fortessa flow cytometer (BD Biosciences) and analyzed with FlowJo software version 10.5 (Tree Star, Ashland, OR, USA). More information about antibodies is listed in the Supplementary Material (Table S2).
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