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7 protocols using cd10 pe cy7

1

Comprehensive B and T Cell Phenotyping

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B cells were purified from the patient’s peripheral blood by positive selection using CD20 magnetic beads (Miltenyi Biotec, Cambridge, MA). CD4+ T cells were isolated from the peripheral blood of research subjects using the EasySep human CD4+ T cell enrichment kit (STEMCELL Technologies, Cambridge, MA). The following antibodies were used for flow cytometric staining: CD19 APC-Cy7, CD27 PerCP-Cy5.5, CD10 PE-Cy7, CD21 V450, CD69 PE, CD86 APC, FAS Alexa 647, CD4 APC-Cy7, CD127 PerCP-Cy5.5, CD45RO Alexa 700, CXCR5 PerCP-Cy5.5, PD-1 PE-Cy7, ICOS APC (all from Biolegend, San Diego, CA), CD3 eFluor 605NC (from eBioscience, San Diego, CA), and CD21 BD Horizon V450 (BD). Intracellular staining for FOXP3 Alexa 488 (eBioscience) and T-bet PE was performed using the FOXP3/Transcription Factor Staining Buffer Set (eBioscience) in accordance with the manufacturer’s directions.
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2

Comprehensive Hematopoietic Progenitor Profiling

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Mononuclear cell surface markers were stained with the following fluorochromes: human hematopoietic lineage markers (CD2, CD3, CD14, CD16, CD19, CD56, CD235a) APC (eBioscience), CD34 PE, CD38 Alexa Fluor 700, CD7 PE-Cy5, CD10 PE-Cy7, CD49f PerCP-Cy5.5, CD45RA Brilliant Violet 570, CD135-Biotin, CD127 (IL7Rα) PE-Cy7, SA-APC-Cy7 (BioLegend). Following surface marker staining, cells were fixed with 2% paraformaldehyde, permeabilized with 0.1% Tween-20 and stained with goat anti-human ARID3a antibody (18 (link)), followed by rabbit anti-goat FITC (Invitrogen). Isotype controls (BD Biosciences, eBiosciences, BioLegend) were used for gating hematopoietic progenitor subsets as described (22 (link), 24 (link)) . Doublet exclusion was used to ensure analyses of single cells prior to forward/side scatter gating. Data were collected using an LSRII (BD Biogenics) and FACSDiva (BD Biosciences) software version 4.1, and were analyzed using FlowJo (Tree Star) software version 10.
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3

Comprehensive Immune Phenotyping of PBMCs

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PBMC were thawed and stained with the LIVE/DEAD Aqua (Life Technologies, Grand Island, NY) viability dye according to the manufacturer protocol. Before fixation, cells were incubated with Human Fc Receptor Binding Inhibitor (eBioscience, San Diego, CA) then stained with the following monoclonal antibodies: CD38-PE-TexasRed (Life Technologies), IgD-FITC (BD Biosciences, San Jose, CA), IgM-Brilliant Violet 421, CD307d (FcRL4)-PE, CD3-Alexa Fluor 700, CD10-PE/Cy7, Streptavidin-APC/Cy7, CD19-PerCP/C5.5 (BioLegend, San Diego, CA), CD24-Biotin, CD21-APC, and CD27-650NC (eBioscience). Cells were then fixed in 2% formaldehyde and analyzed within 1-2 hours on an LSR Fortessa (BD Biosciences). An average of 8×105 events were collected (range of 2×105 to 2×106 events), which resulted in an average of 6.7×104 total B cells analyzed (range of 5×103 to 2×105 B cells). All flow cytometry data was processed using FlowJo Software (Tree Star Inc., San Carlos, CA). Percentages presented for total CD19+ B cell population (CD19+, CD3−) are derived from the percentage of cells within the live gate based on LIVE/DEAD Aqua staining that is within the lymphocyte gate. All B cell subset percentages are the frequency of the total B cell gate (CD19+, CD3−) described above, with the exception of the IgM+ memory B cell subset, which is presented as frequency of CD19+, CD3−, CD10−, CD27+, and IgD−.
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4

Multiparametric Flow Cytometry Analysis

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Cells were washed in phosphate-buffered saline and incubated for 30 minutes at 4 °C with a combination of monoclonal antibodies against human cell surface antigens as presented in Table 1. Antibodies were purchased as described: CD36 APC, CD14 PE-Cy7, CD42 PE, CD33 PE, CD34 APC, CD45 FITC (all from Becton Dickinson), CD34 Pacific Blue, CD45 Alexa Fluor 700, CD41 APC, CD90 APC, CD10 PE-Cy7, CD19 PE-Cy7 (all from Biolegend, Saint Quentin en Yvelines, France), and CD235a PE, 7-AAD (both from Beckmann Coulter, Villepinte, France). Cells were analyzed on a FACSCanto II flow cytometer (Becton Dickinson) using Diva software (version 6.1.3; Becton Dickinson).
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5

Multimodal Characterization of CAR-T Cell Expression

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Surface expression of CD22-CAR-transduced T cells was determined by flow cytometry, using a CD22-Fc chimera (R&D Systems), followed by incubation with phycoerythrin (PE)-F(ab)2 or antigen-presenting cell (APC)-F(ab)2 specific for human immunoglobulin G (IgG)-Fc (Jackson ImmunoResearch Laboratories). Surface expression of CD19-CAR-transduced T cells was detected with anti-CD19 Idiotype or Recombinant Human CD19 Fc Chimera Protein (R&D Systems) conjugated with APC by using the Lightning-Link APC Antibody Labeling Kit (Novus Biologicals). Expression of bivalent CARs was assessed using a combination of both detection reagents as indicated for individual figures. Expression of CD19 and CD22 on B-ALL lines was detected using the following anti-human antibodies: CD45-PerCP-Cy5.5 (eBioscience), CD19-Pacific Blue, CD19-APC-Cy7, CD10-PE-Cy7, and CD22-PE (BioLegend). T cells were characterized with the following antibodies: CD3-APC-Cy7, CD4-Pacific Blue, and CD8a-PE-Cy7 (BioLegend).
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6

B Cell Subset Profiling During Malaria

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PBMCs from during and post-P. vivax infection were used for B cell subset phenotyping. All B cell phenotypic analyses were performed using mouse monoclonal antibodies (mAbs) specific for human B cell markers conjugated to fluorophores as follows: FITC-CD19, PerCP-CD20, PE/Cy7-CD10, PE-CD27, and APC-CD21 (Biolegend). Using this strategy as showed in Supplementary Fig. 4, we observed the proportion of naive B cells as the number of CD10CD19+CD20+CD21+CD27cells; plasma cells/blasts were of CD19+CD21CD20 cells; immature B cells were CD19+CD10+ cells; classical MBCs were CD10CD19+CD20+CD21+CD27+ cells; atypical MBCs were of CD10CD19+CD20+CD21CD27 cells; and activated MBCs were CD10CD19+CD20+CD21CD27+ cells. The relative proportions of all the B cell subpopulations as analyzed per total CD19+ B cells for each sample group was determined. FACS analyses were performed on a FACSCanto II flow cytometer (BD Biosciences) using FlowJo software (Tree Star).
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7

B Cell Subsets Profiling in Malaria

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PBMCs collected during acute malaria and 18 months post-infection were used for B cell sub-set phenotyping. Fluorochrome-conjugated, mouse anti-human monoclonal antibodies were used to stain 1 million PBMCs/100 μL FACS buffer. A cocktail consisting of the following mouse monoclonal antibodies was used: FITC-CD19, PerCP-CD20, PE/Cy7-CD10, PE-CD27, and APC-CD21 (Biolegend, San Diego, CA, USA). After staining for 15 min, cells were washed with FACS buffer. Finally, cells were suspended in 250 μL FACS buffer. The analyses were done by a flow cytometer (BD FACSCanto II, Becton–Dickinson Immunocytometry Systems, San Jose, CA, USA). Data were processed using FlowJo software (Tree Star, San Carlos, CA, USA).
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