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11 protocols using cd27 bv605

1

Multiparametric Flow Cytometry of B Cells

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Antibodies used were CD19 PE (LT19; Miltenyi), CD138 allophycocyanin
(B-B4; Miltenyi Biotec), CD38 PE-Cy7 (HB7; BD Biosciences), CD38 AF700 (HIT2;
Biolegend), CD20 efluor V450 (2H7; eBioscience); CD27 AF647 (LT27; AbD Serotec),
CD27 FITC (M-T271), CD19 PerCP-Cy5.5 (SJ225C1; BD Biosciences), CD19 PE-Cy7
(SJ225C1; BD Biosciences), CD24 FITC(ML5; BD Biosciences), CD84 PE (CD84.1.21;
Biolegend), CD38 PerCP-Cy5.5 (HIT2; BD Biosciences), CD95 BV421 (DX2;
Biolegend), CD20 APC-H7(L27; BD Biosciences), CD27 BV605 (O323; Biolegend), CD3
VioGreen (BW264/56; Miltenyi), Ki67 FITC (B56; BD Biosciences), unconjugated
goat anti-IRF4 (M-17; Santa Cruz) and donkey anti-goat IgG AF488 (Polyclonal;
Invitrogen). Controls were isotype-matched mouse mAbs. Annexin V FITC was from
eBioscience and 7-AAD from BD Biosciences.
Reagents included human IL-2 (Roche); IL-6 (Peprotech) and IFN-α
(Sigma); IL-21 (PeproTech); goat anti-human F(ab′)2 fragments
(anti-IgM and -IgG; Jackson Immunoresearch); HybridoMax hybridoma growth
supplement (Gentaur); Lipid Mixture 1, chemically defined (200X) and MEM Amino
Acids Solution (50X; Sigma).
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2

Comprehensive Multicolor Flow Cytometry for Plasma Cell Analysis

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Abs used were CD19 PE (LT19; Miltenyi Biotec), CD138 allophycocyanin (B-B4; Miltenyi Biotec), CD38 PE-Cy7 (HB7; BD Biosciences), CD38 AF700 (HIT2; BioLegend), CD20 eFluor V450 (2H7; eBioscience); CD27 AF647 (LT27; AbD Serotec), CD27 FITC (M-T271), CD19 PerCP-Cy5.5 (SJ225C1; BD Biosciences), CD19 PE-Cy7 (SJ225C1; BD Biosciences), CD24 FITC (ML5; BD Biosciences), CD84 PE (CD84.1.21; BioLegend), CD38 PerCP-Cy5.5 (HIT2; BD Biosciences), CD95 BV421 (DX2; BioLegend), CD20 allophycocyanin-H7 (L27; BD Biosciences), CD27 BV605 (O323; BioLegend), CD3 VioGreen (BW264/56; Miltenyi Biotec), Ki67 FITC (B56; BD Biosciences), unconjugated goat anti-IRF4 (M-17; Santa Cruz Biotechnology), and donkey anti-goat IgG AF488 (polyclonal; Invitrogen). Controls were isotype-matched mouse mAbs. Annexin V FITC was from eBioscience, and 7-AAD was from BD Biosciences.
Reagents included human IL-2 (Roche), IL-6 (PeproTech), IFN-α (Sigma), IL-21 (PeproTech), goat anti-human F(ab′)2 fragments (anti-IgM and anti-IgG; Jackson ImmunoResearch), HybridoMax hybridoma growth supplement (Gentaur), Lipid Mixture 1, Chemically Defined (200×), and MEM Amino Acids Solution (50×, Sigma).
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3

Antigen-Specific B Cell Sorting

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PBMCs were thawed and B cells were enriched using EasySep™ pan B cell magnetic enrichment kit (STEMCELL). B cells were stained with a panel containing CD19 PE-Cy7 (Biolegend), IgM APC (Southern Biotech), CD27 BV605 (Biolegend), CD38 BB515 (BD Biosciences), and CD3 BV510 (BD Biosciences). B cells were stained with surface stain master mix and each COVID-19 antigen probe for 30 minutes on ice in 1X PBS supplemented with 0.2% BSA and 2 mM Pierce Biotin. Cells were stained with probe at a 1:100 dilution (NP, ORF8, RBD, PUUV, empty PE-SA) or 1:200 dilution (spike, endemic HCoV spikes). Cells were subsequently washed with 1X PBS 0.2% BSA and stained with Live/Dead BV510 (Thermo Fisher) in 1X PBS for 15 minutes. Cells were washed again and re-suspended at a maximum of 4 million cells/mL in 1X PBS supplemented with 0.2% BSA and 2 mM Pierce Biotin for downstream cell sorting using the MACSQuantTyto cartridge sorting platform (Miltenyi). Cells that were viable/CD19+/antigen-PE+ or viable/CD19+/antigen-APC+ were sorted as probe positive. The PE+ and APC+ gates were drawn by use of FMO controls. Cells were then collected from the cartridge sorting chamber and used for downstream 10X Genomics analysis.
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4

Multiparametric Flow Cytometry of Tonsil Cells

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The following titrated, conjugated antibodies were used for flow cytometry analysis: CD3-H7APC (SK7, BD Biosciences), CD4-BV650 (SK3, BD Biosciences), CD8-Pacific Blue (RPA-T8, BD Pharmingen), CD19-FITC (J3-119, Beckman-Coulter), CD27-BV605 (O323, Biolegend), CD45RO-Cy5PE (UCHL1, BD Pharmingen), PD-1-BV711 (EH12.2H7, Biolegend), CD57-AF594 (NK-1, Novus Bio), IgD-PE (Goat polyclonal, Southern Biotech), CD20-BV570 (2H7, Biolegend), CD38-BV786 (HIT2, Biolegend). 1-2×106 tonsil-derived cells were thawed and rested for 2h in a cell culture incubator before staining. Cells were washed with PBS, BSA (0.5%), incubated (5 min, RT) with a viability dye (Aqua-dye, Invitrogen) and surface stained with titrated amounts of antibodies for 30 min at room temperature. After washing, cells were resuspended and fixed with 1% paraformaldehyde.
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5

Immunophenotyping of Whole Blood Samples

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Venous blood was drawn into an ethylenediaminetetraacetic acid (EDTA) S-monovette (Sarstedt, Nümbrecht, Germany) for immunophenotyping. Whole blood (100 µl per flow cytometry panel) was directly stained in FACS tubes with fluorescence-labeled antibodies (BD-Biosciences, Franklin Lakes, United States: CD8-PerCP-Cy5.5, CD5-PE, CD45RA-PE-CF594, CD19-PE-Cy5, CD4-PE-Cy7, CD45RO-APC, CD38-A700, CD3-APC-H7, CD138-BV421, CD10-BV510, CD27-BV605, CD14-PE-CF594, CD19-PE-Cy5, CD25-PE-Cy7, CD16-A700, CD3-APC-H7, CD11b-BV421, HLADR-BV510; Biolegend, San Diego, United States: CD11c-BV605; Miltenyi Biotec, Bergisch-Gladbach, Germany: BDCA1-APC, BDCA2-PE) for 15 min in the dark at room temperature (RT). After washing, red blood cell (RBC) lysis was performed with 2 ml ACK lysing buffer (Thermo Scientific, Waltham, United States) for 7 min in the dark at RT. 2 ml of FACS buffer (phosphate buffered saline, 3% fetal calf serum, 1% sodium azide) was added to wash the samples twice. Subsequently, cells were resuspended in 400 µl FACS-buffer. After the staining procedure, cells were measured by flow cytometry (LSR Fortessa cytometer, BD Biosciences, Franklin Lakes, United States) and analyzed with FACS-Diva Software (BD Biosciences, Franklin Lakes, United States). The gating strategy is available in the supplementary data section of this paper (Supplementary Figure S7).
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6

Immunophenotyping of Lymph Node-Derived Lymphocytes

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Lymph node-derived lymphocytes were stained with Aqua and the following titrated antibodies: CD3-Cy7APC, CD20-BV570, IgD-PE (Southern Biotech, cat no.2030-02), IgM-Cy5PE (clone G20-127, BD Biosciences), IgG-APC (clone G18-145, BD Biosciences), CD27-BV605 (clone O323, Biolegend), PNA-PE (GeneTex), CD86-FITC (IT2.2, BD Biosciences) and CXCR4-Cy7PE. In all, 2–3 × 106 cells were stained with Aqua and biotinylated Env gp120 probe on ice for 30 min. Following a staining step with streptavidin, cells were surface-stained with antibodies and peanut agglutinin (PNA). The staining step was followed by washing and fixation using 1% paraformaldehyde (gating strategy in Supplementary Figure 5d).
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7

Phenotyping PfCSP+ Memory B Cells

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Cryopreserved PBMCs from the VRC 314 trial were thawed and stained for 30 minutes at room temperature in the dark with the following panel: 1:500 Blue LIVE/DEAD (Thermo Fisher Scientific L23105), 18 μg/mL IgA-Dylight 405 (Jackson Immunoresearch 109-475-011), 1:50 CD14-BV510 (BioLegend 301842), 1:50 CD3-BV510 (BioLegend 317332), 1:100 CD8-BV510 (301048), 1:50 CD56-BV510 (BioLegend 318340), 1:50 CD27-BV605 (BioLegend 302830), 1:40 CD21-BV711 (BD Biosciences 563163), 1:50 CD19-BV750 (BioLegend 302236), 1:125 IgD-PECy7 (BD Biosciences 561314), 1:20 IgM-Brilliant Ultraviolet (BUV)395 (BD Biosciences 563903), 1:125 CD38-Alexa Fluor 700 (BD Biosciences 560676), 1:40 IgG-allophycocyanin (APC)H7 (BD Biosciences 561297), 1:25 PfCSP-Brilliant Blue (BB)660, and 1:25 PfCSP-BUV737. The PfCSP probes were made by conjugating biotinylated PfCSP to streptavidin tagged with the relevant fluorescent dye. The cells were sorted using a BD FACS Aria II and analyzed with FlowJo software (Tree Star). Cells were gated on live CD19+CD14-CD3-CD8-CD56-CD21+CD27+IgA+/IgG+, with CD27++CD38++ cells excluded.
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8

SARS-CoV-2 Spike and RBD Staining of PBMCs

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PBMCs were stained with SARS-CoV-2 Spike and RBD probes, as previously described (Juno et al., 2020 (link)). Probes were generated by sequential addition of streptavidin-phycoerythrin (PE) (Thermo Fisher Scientific) to trimeric S protein biotinylated using recombinant Bir-A (Avidity), while SARS-CoV-2 RBD was labeled to APC using an APC Conjugation Lightning-Link Kit (Abcam). PBMCs were surface stained with Aqua viability dye (Thermo Fisher) and monoclonal antibodies against CD19-ECD (#IM2708U, Beckman Coulter), IgM BUV395 (#563903), CD21 BUV737 (#564437), IgD PE-Cy7 (#561314), IgG BV786 (#564230), streptavidin-BV510 (#563261) (BD Biosciences), CD20 APC-Cy7 (#302314), CD14 BV510 (#301841), CD3 BV510 (#317332), CD8a BV510 (#301048), CD16 BV510 (#302048), CD10 BV510 (#312220) and CD27 BV605 (#302829) (BioLegend). Cells were washed, fixed with 1% formaldehyde and acquired on a BD LSRII Fortessa.
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9

Enrichment and Sorting of SARS-CoV-2 Antigen-Specific B Cells

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PBMCs were thawed and B cells were enriched using EasySep™ pan B cell magnetic enrichment kit (STEMCELL). B cells were stained with a panel containing CD19 PE-Cy7 (Biolegend), IgM APC (Southern Biotech), CD27 BV605 (Biolegend), CD38 BB515 (BD Biosciences), and CD3 BV510 (BD Biosciences). B cells were stained with surface stain master mix and each COVID-19 antigen probe for 30 minutes on ice in 1X PBS supplemented with 0.2% BSA and 2 mM Pierce Biotin. Cells were stained with probe at a 1:100 dilution (NP, ORF7a, ORF8, RBD) or 1:200 dilution (spike). Cells were subsequently washed with 1X PBS 0.2% BSA and stained with Live/Dead BV510 (Thermo Fisher) in 1X PBS for 15 minutes. Cells were washed again and re-suspended at a maximum of 4 million cells/mL in 1X PBS supplemented with 0.2% BSA and 2 mM Pierce Biotin for downstream cell sorting using the MACSQuantTyto cartridge sorting platform (Miltenyi). Cells that were viable/CD19+/antigen-PE+ were sorted as probe positive. The PE+ gate was drawn by use of FMO controls. Cells were then collected from the cartridge sorting chamber and used for downstream 10X Genomics analysis.
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10

Phenotyping PfCSP+ Memory B Cells

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Cryopreserved PBMCs from the VRC 314 trial were thawed and stained for 30 minutes at room temperature in the dark with the following panel: 1:500 Blue LIVE/DEAD (Thermo Fisher Scientific L23105), 18 μg/mL IgA-Dylight 405 (Jackson Immunoresearch 109-475-011), 1:50 CD14-BV510 (BioLegend 301842), 1:50 CD3-BV510 (BioLegend 317332), 1:100 CD8-BV510 (301048), 1:50 CD56-BV510 (BioLegend 318340), 1:50 CD27-BV605 (BioLegend 302830), 1:40 CD21-BV711 (BD Biosciences 563163), 1:50 CD19-BV750 (BioLegend 302236), 1:125 IgD-PECy7 (BD Biosciences 561314), 1:20 IgM-Brilliant Ultraviolet (BUV)395 (BD Biosciences 563903), 1:125 CD38-Alexa Fluor 700 (BD Biosciences 560676), 1:40 IgG-allophycocyanin (APC)H7 (BD Biosciences 561297), 1:25 PfCSP-Brilliant Blue (BB)660, and 1:25 PfCSP-BUV737. The PfCSP probes were made by conjugating biotinylated PfCSP to streptavidin tagged with the relevant fluorescent dye. The cells were sorted using a BD FACS Aria II and analyzed with FlowJo software (Tree Star). Cells were gated on live CD19+CD14-CD3-CD8-CD56-CD21+CD27+IgA+/IgG+, with CD27++CD38++ cells excluded.
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