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7 protocols using cd45ra bv650

1

Multiparametric Immune Cell Profiling

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PBMCs were labeled with different combinations of the following antibodies: CD4 BUV737 (BD, clone SK3), CD8 BV786 (BD, clone RPA-T8), CD8 BUV805 (BD, clone SK1), CD3 V500 (BD, clone UCHT1), CD3 eVolve605 (eBioscience clone OKT3), CD27 APC-eFluor780 (eBioscience, clone), CD27 BV510 (Biolegend, clone O323), CD45RA BV650 (BD, clone HI100), CD45RA Qdot655 (Invitrogen, clone MEM-56), CD28 PE-Cy7 (BD, clone 28.2), CX3CR1 APC (eBioscience, clone 2A9-1), CCR7 BV421 (Biolegend, clone G043H7), CD127 BV421 (Biolegend, clone A019D5). Near-IR fixable dye (Invitrogen) was used to exclude dead cells from the analysis. For intracellular staining, the following antibodies were used: Hobit IgM (BD, clone Sanquin-Hobit/1), Eomes eFluor660 (eBioscience, clone WD1928), Tbet BV421 (Biolegend, clone 4B10), Granzyme B AF700 (BD, clone GB11), Perforin FITC (eBioscience, clone dG9), Perforin PE (eBioscience, clone B-D48), Granzyme K PE (Immunotools, clone 24C3), Granzyme K FITC (Immunotools, clone 24C3). To stain for Hobit IgM, a secondary anti-IgM labeled with PE or FITC was used. The cells were labeled according to manufacturer’s instructions. For the intracellular staining, the cells were fixed and permeabilized using the Foxp3/Transcription Factor Staining kit (eBioscience). The samples were measured in PBS 0.5% FCS with a LSR Fortessa (BD). The analysis was done using FlowJo Version 10 software.
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2

Multiparametric Immune Cell Profiling

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All antibodies are from BioLegend (San Diego) unless otherwise noted: CD16-APC-fire750, clone: 3G8; CD56-AF647, clone: NCAM; CD45RA-BV650, clone: HI100; CCR7-Pe/Dazzle 594, clone: G043H7; CD8-PeCy7, clone: SK1; CD45-A488, clone: SD1; CD4-AF700, clone: OKT4; CD19-BV605, clone: HIB19; CD3-BV785, clone: OKT3; HLADR-PE, clone: L243 (BD Biosciences, CA); CD14-PerCP-Cy5.5, clone: MφP9 (BD Biosciences, CA); Zombie Aqua™ Fixable Viability Kit.
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3

T Cell Phenotyping for Memory Subsets

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The following T cell phenotyping panel was used to determine Tcm, Tem, Tscm and Tnaive populations - CD3 PE-Cy7 (Clone UCHT1), CD4 APC-Cy7 (Clone RPA-T4), CD8 APC (Clone RPA-T8), CD62L BV510 (Clone DREG-56), CD45RA BV650 (Clone HI100), CD95 BV711 (Clone DX2) (BD Biosciences).
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4

Quantifying SARS-CoV-2 Spike-specific T cells

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Frequencies of S-specific memory T cells in blood and BAL were assessed using a re-stimulation assay as described previously using 2 μg/mL PepMix SARS-CoV-2 Spike overlapping peptides in DMSO (15mers with 11 amino acid overlap, JPT Peptide Technologies)51 (link). The antibody panel used for surface staining was: CD103 FITC (2G5, Beckman Coulter, cat# B49222, 1:50 dilution), CCR7 BV421 (G043H7, Biolegend, cat# 353208, 1:50 dilution), CD8a BV711 (RPA-T8, Biolegend, cat# 301044, 1:80 dilution), CD4 PE-Cy5.5 (S3.5, Invitrogen, cat# MHCD0418, 1:80 dilution) and CD45RA BV650 (5H9, BD, cat# 740608, 1:500 dilution), and the intracellular proteins were stained using: IL-21 AF647 (3A3-N2.1, BD, cat# 560493, 1:20 dilution), IL-13 PE (JES10-5A2, BD, cat# 559328, 1:33 dilution), IL-2 BV605 (MQ1-17H12, BD, cat# 564165, 1:50 dilution), IL-17A BV785 (BL168, Biolegend, cat# 512338, 1:67 dilution), CD69 ECD (TP.1.55.3, Beckman Coulter, cat# 6607110, 1:67 dilution), CD3 APC-Cy7 (SP34-2, BD, cat# 557757, 1:200 dilution) and IFNγ AF700 (B27, Biolegend, cat# 506516, 1:200 dilution). Acquisition was performed using BD LSRFortessa cell analyzer, and the data were analyzed using FlowJo software v.10.7.1 (FlowJo).
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5

Comprehensive T Cell Phenotyping

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A multi-color flow cytometry panel was designed to assess T cell phenotype markers. At select time points during expansion, T cells were stained using an antibody cocktail (CD4-BUV395, CD8-APC-H7, CD25-PE-Cy7, CD27-BUV737, CD45RA-BV650, CD45RO-PE-CF594, CD69-BV786, CD197/CCR7-PE, and CD279/PD1-BV421; BD Biosciences) diluted in staining solution (1:1 mixture of Brilliant Stain Buffer Plus [BD Biosciences, #566385] and PBS with 1% FBS, 10 mM HEPES, and 2 mM EDTA) for 30 min at room temperature, centrifuged, re-suspended in fixation solution (1% formaldehyde in PBS), and immediately analyzed.
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6

Immunophenotyping of Severe COVID-19 PBMC

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Cryopreserved PBMC from patients hospitalized because of COVID-19 severe interstitial pneumonia (severe) and OTD subjects were thawed, washed and rested for 30 min in complete RPMI-1640 medium supplemented with 10% FCS, 2mM L-glutamine and antibiotic antimycotic solution (100 U/ml penicillin, 0.1 μg/ml streptomycin, 0.25 μg/ml amphotericin B (Sigma- Aldrich, St. Louis, MO, USA) (Complete Medium). Subsequently, PBMC were washed and stained for flow cytometric analysis using the following fluorochrome conjugated antibodies: CD8 BV421, CCR7 BV510, PD1 PE-CF594, CD45RA BV650, CD56 BV786, TIM-3 BB515, CD69 PE, CD4 BB700, CD3 APC-H7 (BD Biosciences, San Diego, CA, USA). After fixation and permeabilization (Fixation/Permeabilization Solution Kit; BD Biosciences), cells were stained with anti-Granzyme B Alexa 647 (BD Biosciences). To detect circulating T follicular helper (TFH) cells 1×106 PBMC were stained with the following antibodies: CD3 BV510, CD4 BB700, CD8 BV786, PD1 PE and CXCR5 BV421. The following antibodies were used to identify plasma cells: CD19 BV605, CD27 BB515, CD38 BV421and CD138 BV480. Flow cytometry was performed with a 12-color Celesta (BD Biosciences) instrument and data analyzed with FlowJo 10 software.
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7

Multiparametric Immune Cell Profiling

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All antibodies are from BioLegend (San Diego) unless otherwise noted: CD16-APC-fire750, clone: 3G8; CD56-AF647, clone: NCAM; CD45RA-BV650, clone: HI100; CCR7-Pe/Dazzle 594, clone: G043H7; CD8-PeCy7, clone: SK1; CD45-A488, clone: SD1; CD4-AF700, clone: OKT4; CD19-BV605, clone: HIB19; CD3-BV785, clone: OKT3; HLADR-PE, clone: L243 (BD Biosciences, CA); CD14-PerCP-Cy5.5, clone: MφP9 (BD Biosciences, CA); Zombie Aqua™ Fixable Viability Kit.
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