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9 protocols using cd3 af700 clone ucht1

1

Zika Virus Antibody Phagocytosis Assay

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Recombinant soluble ZIKV E protein was biotinylated and coupled to Alexa Fluor dye coupled Neutravidin beads (Life Technologies). Microscale-purified mAbs were tested at a single 1:10 dilution; concentrations were not normalized. Antibodies were diluted in cell culture medium and incubated with beads for 2 hrs at 37°C. White blood cells were isolated from the peripheral blood of subjects by lysis of red blood cells, followed by three washes with PBS. Cells were added at a concentration of 5.0 × 104 cells/well and incubated for 1 hr at 37°C. Cells were stained with anti-human CD66b (Pacific Blue, Clone G10F5; BioLegend), -CD3 (AF700, Clone UCHT1; BD Biosciences), and -CD14 (APC-Cy7, Clone MφP9; BD Biosciences) antibodies (1:100 dilution of each), then fixed with 4% PFA, and analyzed by flow cytometry on a BD LSR II flow cytometer. Neutrophils were defined as SSC-Ahigh CD66b+, CD3-, CD14-. A phagocytic score was determined using the percentage of Alexa Fluor 488+ cells and the MFI of the Alexa Fluor 488+ cells. Z-score values were calculated as described above. The previously identified mAb ZIKV-117 was used as a positive control, and mAb FLU-5J8 was used as a negative control.
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2

Flow Cytometry Analysis of B-ALL and Healthy Samples

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Flow cytometry was performed for three newly diagnosed and untreated B-ALL patients and three healthy individuals. The clinical information of these samples is listed in Supplementary Table S7. Cell surface staining and intracellular staining were carried out in 1× phosphate buffered saline (PBS) and using the BD Transcription Factor Buffer Set, respectively. Flow cytometry was performed using the BD LSRFortessa cytometer, and data analysis was performed using FlowJo (version 10.5.3) (BD). Cell surface and intracellular staining was performed using the following fluorophore-conjugated antibodies: CD45-BUV395 (clone HI30, BD), CD3-AF700 (clone UCHT1, BD), CD4-APC-H7 (clone RPAT4, BD), CD8-Percp-cy5.5 (clone SK1, BioLegend), Ki-67-PE-CF594 (clone Ki-67, BioLegend), PD-1-BV421 (clone MIH4, BD), and CD103-BB515 (clone Ber-ACT8, BD). Cell surface and intracellular staining was performed according to the manufacturer’s instructions.
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3

Multiparameter Flow Cytometry for Cell Phenotyping

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Cell surface staining for flow cytometry was performed using the following antibodies: CD45-BUV395 (clone HI30, BD), CD3-AF700 (clone UCHT1, BD), CD4-APC-H7 (clone RPA-T4, BD), CD8-APC-H7 (clone SK1, BD), TIGIT-PE/Dazzle™ 594 (clone A15153G, Biolegend), TIGIT-BV421 (clone A15153G, Biolegend), and PD1-BV421 (clone EH12.2H7, Biolegend). These antibodies were used to analyze surface receptors in two different panels. Isotype-matched antibodies, labeled with the proper fluorochromes, were used as negative controls. Extracellular staining was performed according to the manufacturer’s instructions. Briefly, an antibody cocktail was added to whole blood or BM samples, which were then incubated at room temperature for 15 minutes in the dark, followed by red cell lysis with lysis buffer (BD; Cat: 555899). The lysed cells were washed twice with phosphate buffer saline (PBS), and then 350 μl stain buffer was added for further flow cytometer analysis. Twenty microliters of absolute count microsphere (Thermo; Cat: C36950) were added to the samples for absolute number analysis. Cells were analyzed using a BD Fortessa flow cytometer (BD Biosciences), and data analysis performed with Flowjo 10.6 software.
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Flow cytometry cell surface staining

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Cell surface staining for flow cytometry was performed using the following antibodies: CD3-AF700 (clone UCHT1, BD), CD4-APC-H7 (clone RPA-T4, BD), CD8-APC-H7 (clone SK1, BD) and PD-1-BV421 (clone EH12.2H7, Biolegend). Isotype-matched antibodies, labeled with the proper fluorochromes, were used as negative controls. Cells were analyzed using a BD Fortessa flow cytometer (BD Biosciences), and data analysis was performed with Flowjo 10.6 software as previously described (22 (link)).
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5

Antigen-specific CD8+ T cell sorting

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Approximately 5 × 106 CD8+ T cells and 10 × 106 PBMCs were rested overnight and washed twice in PBS. The cells were then supplemented with 0.05 U/µL of RNase inhibitor (RNase outTM recombinant ribonuclease inhibitor) and stained with either PE-conjugated HLA B*57:01/ VSFIEFVGWL or HLA B*57:01/QSRGDENRGW tetramer at a final concentration of 10 nM for 20 min at room temperature in the dark. The cells were pelleted by centrifugation at 400 g for 7 min and washed in FACS buffer (PBS + 1%FBS), followed by surface staining with antibodies, fixable viability stain 620 (BD Biosciences, 1:1000 dilution), CD3-AF700 (clone UCHT1, BD Biosciences, 1:50 dilution), and anti-CD8a Allophycocyanin-Fire 750 (clone RPA-T8, BioLegend, 1:40 dilution) for 30 min at room temperature in the dark. After washing the cells twice in FACS buffer, cells were resuspended in 500 µL of FACS buffer and strained using a polystyrene tube with cell strainer cap (In Vitro Technologies) and supplemented with 0.1 U/µL RNase inhibitor. Cells were left on wet ice and protected from light until the time of sort. Finally, individual cells were sorted directly into each well of a 96-well plate containing 3 µL of lysis buffer using the FACSAria III cell sorter.
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6

Multiparameter Flow Cytometry Panel

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Fixable Viability Stain 510 was obtained from ThermoFisher Scientific (#L34957, 1/1000). The following antibodies were used in staining experiments: CD3 AF700 Clone UCHT1 (BD Biosciences, #557943, 1/50), CD4 PE-Cy7 Clone L200 (BD Bioscience, #560644, 1/200) and CD4 BV786 Clone SK3 (BD Biosciences, #563881, 1/200), CD8 BV510 Clone RPA-T8 (BioLegend, #301047, 1/200), CD45RO BV421 Clone UCHL1 (BD Biosciences, #562649, 1/100) or CD45RO PE Clone HI100 (BD Biosciences, #5555493, 1/20), CD27 BV605 Clone L128 (BD Biosciences, #562656, 1/100), PD1 BB700 Clone EH12.1 (BD Biosciences, #566461, 1/100), CD69 PerCP-Cy5.5 Clone FN50 (BD Biosciences, #560738) and CD69 APC (BioLegend, #310909, 1/50), CD25 BV421 Clone M-A251 (BD Biosciences, #562443, 1/50), HLA-DR FITC Clone REA805 (Miltenyi Biotech, #130-111-788, 1/50), GZMA PE-Cy7 Clone CB9 (BioLegend, #507221, 1/25), GZMB PB Clone GB11 (BioLegend, #515407, 1/50), CCL5 PerCP-Cy5.5 Clone VL1 (BioLegend, #515507, 1/50), CD127 PE-CF594 Clone HIL-7R-M21 (BD Biosciences, #562397, 1/50). For p24 staining, we used a combination of two antibodies: p24 KC57-FITC (Beckman Coulter, #6604665, 1/500) and p24 28B7-APC (MediMabs, #MM-0289-APC, 1/400).
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7

Zika Virus Antibody Phagocytosis Assay

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Recombinant soluble ZIKV E protein was biotinylated and coupled to Alexa Fluor dye coupled Neutravidin beads (Life Technologies). Microscale-purified mAbs were tested at a single 1:10 dilution; concentrations were not normalized. Antibodies were diluted in cell culture medium and incubated with beads for 2 hrs at 37°C. White blood cells were isolated from the peripheral blood of subjects by lysis of red blood cells, followed by three washes with PBS. Cells were added at a concentration of 5.0 × 104 cells/well and incubated for 1 hr at 37°C. Cells were stained with anti-human CD66b (Pacific Blue, Clone G10F5; BioLegend), -CD3 (AF700, Clone UCHT1; BD Biosciences), and -CD14 (APC-Cy7, Clone MφP9; BD Biosciences) antibodies (1:100 dilution of each), then fixed with 4% PFA, and analyzed by flow cytometry on a BD LSR II flow cytometer. Neutrophils were defined as SSC-Ahigh CD66b+, CD3-, CD14-. A phagocytic score was determined using the percentage of Alexa Fluor 488+ cells and the MFI of the Alexa Fluor 488+ cells. Z-score values were calculated as described above. The previously identified mAb ZIKV-117 was used as a positive control, and mAb FLU-5J8 was used as a negative control.
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8

Quantifying Antibody-Mediated NK Cell Activation

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Recombinant EBOV GP ΔTM (IBT Bioservices) was coated onto a MaxiSorp 96 well plates (Nunc) at 300 ng/well at 4°C for 18 hrs. Wells were washed three times with PBS and blocked with 5% BSA in PBS. Antibodies were diluted to 10 μg/mL in PBS, and added to the plates, and were incubated for an additional 2 hrs at 37°C. Unbound antibodies were removed by washing three times with PBS, and human NK cells freshly isolated from peripheral blood of human donors by negative selection (Stem Cell Technologies, Canada) were added at 5 × 104 cells/well in the presence of 4 μg/mL brefeldin A (Sigma-Aldrich Aldrich) and 5 μg/mL GolgiStop (Life Technologies) and anti-CD107a antibody (PE-Cy5, Clone H4A3, BD Biosciences). Plates were incubated for 5 hrs at 37°C. Cells were stained for NK cell markers (CD56 PE-Cy7, clone B159, BD Biosciences; CD16 APC-Cy7, clone 3G8, BD Biosciences; CD3 AF700, clone UCHT1, BD Biosciences), followed by fixation and permeabilization with Fix and Perm (Life Technologies) according to the manufacturer’s instructions to stain for intracellular IFNγ (APC, Clone B27, BD Biosciences) and MIP-1β (PE, Clone D21–1351, BD Biosciences). Cells were analyzed on a BD LSRII flow cytometer. The glycan cap-specific mAb c13C6 (IBT Bioservices) was used as a positive control, and the DENV-specific mAb 2D22 was used as a negative control.
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9

Antibody-Mediated NK Cell Activation Assay

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Recombinant EBOV GP ΔTM (IBT Bioservices) was coated onto a MaxiSorp 96 well plates (Nunc) at 300 ng/well at 4°C for 18 h. Wells were washed three times with PBS and blocked with 5% BSA in PBS. Antibodies were diluted to 10 μg/mL in PBS, and added to the plates, and were incubated for an additional 2 h at 37°C. Unbound antibodies were removed by washing three times with PBS, and human NK cells freshly isolated from peripheral blood of human donors by negative selection (Stem Cell Technologies, Canada) were added at 5 Ч 104 cells/well in the presence of 4 μg/mL brefeldin A (Sigma-Aldrich Aldrich) and 5 μg/mL GolgiStop (Life Technologies) and anti-CD107a antibody (PE-Cy5, Clone H4A3, BD Biosciences). Plates were incubated for 5 h at 37°C. Cells were stained for NK cell markers (CD56 PE-Cy7, clone B159, BD Biosciences; CD16 APC-Cy7, clone 3G8, BD Biosciences; CD3 AF700, clone UCHT1, BD Biosciences), followed by fixation and permeabilization with Fix and Perm (Life Technologies) according to the manufacturer’s instructions to stain for intracellular IFNγ (APC, Clone B27, BD Biosciences) and MIP-1β (PE, Clone D21-1351, BD Biosciences). Cells were analyzed on a BD LSRII flow cytometer. The glycan cap-specific mAb c13C6 (IBT Bioservices) was used as a positive control, and the DENV-specific mAb 2D22 was used as a negative control.
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