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7 protocols using pe conjugated anti human cd19

1

Characterizing Mesenchymal Stem Cells by Flow Cytometry

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Standard flow cytometry was performed to determine the presence of MSC markers, as defined by the International Society for Cellular Therapy.15 UC‐MSCs were stained using a Human MSC Analysis kit (BD Biosciences, Franklin Lakes, NJ, USA) containing the following mouse monoclonal antibodies, which are positive markers for MSCs: fluorescein isothiocyanate (FITC)‐conjugated anti‐human CD90; phycoerythrin (PE)‐conjugated anti‐human CD105; allophycocyanin (APC)‐conjugated anti‐human CD73; FITC‐conjugated anti‐human CD44 (BD Biosciences), and PE‐conjugated anti‐HLA‐ABC (BD Biosciences). Additionally, UC‐MSCs were stained with FITC‐conjugated anti‐HLA‐DR (BD Biosciences), FITC‐conjugated anti‐human CD34 (BD Biosciences), PE‐conjugated anti‐human CD11b (BD Biosciences), PE‐conjugated anti‐human CD19 (BD Biosciences), or APC‐conjugated anti‐CD45 (BD Biosciences); these are negative markers for MSCs. Propidium iodide was used to identify and exclude dead cells using flow cytometry, as previously described.16
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Multiparametric Flow Cytometry Analysis

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Mononuclear cells were suspended in 100 μl of phosphate-buffered saline and incubated with antibodies. After washing, cells were analyzed using a FACSCalibur flow cytometer equipped with Cell Quest software (BD Biosciences, San Diego, CA) and FlowJo software. The antibodies used to detect cells included APC-conjugated anti-human CD1d tetramer (Proimmune, D001-4A), FITC-conjugated anti-human CD3 (BD, 555339), APC-conjugated anti-human CD56 (BD, 555518), FITC and PE-conjugated anti-human CD3/CD16+CD56 (340042, BD Simultest), PE-Cy5-conjugated anti-human CD4 (555348, BD Pharmingen), PerCP-conjugated anti-human CD8 (347314, BD Pharmingen), and PE-conjugated anti-human CD19 (340364, BD Pharmingen). Flow cytometric data were analyzed using appropriate controls of proper isotype-matched IgG and unstained samples.
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3

Multiparametric Flow Cytometry Analysis

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The MSCs were stained using the following mouse monoclonal antibodies: fluorescein isothiocyanate (FITC)-conjugated anti-human CD90, phycoerythrin (PE)-conjugated anti-human CD105, allophycocyanin (APC)-conjugated anti-human CD73, FITC-conjugated anti-human CD44 (BD Biosciences), PE-conjugated anti-HLA-ABC (BD Biosciences), FITC-conjugated anti-HLA-DR (BD Biosciences), FITC-conjugated anti-human CD34 (BD Biosciences), PE-conjugated anti-human CD 11b (BD Biosciences), PE-conjugated anti-human CD 19 (BD Biosciences), and APC-conjugated anti-CD45 (BD Biosciences). Propidium iodide was used to identify and exclude the dead cells. The stained cells were acquired with a FACS Canto II flow cytometer (BD Biosystems) and analyzed using the FlowJo software (Tomy Digital Biology, Co. Ltd.). As for microglia, EYFP-expressing microglia were stained using APC-conjugated anti-mouse CD86 (BioLegend), PE-conjugated anti-mouse CD206 (ThermoFisher), and the Live/Dead™ fixable near-IR dead cell stain kit (Invitrogen). The stained cells were acquired with a Gallios flow cytometer (Beckman Coulter) and analyzed using the FlowJo software (Tomy Digital Biology, Co. Ltd.). Three independent FACS experiments were performed.
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4

Monocyte-Endothelial Cell Interaction Assay

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Human microvascular ECs (HMVECs) and the U937 human monocyte cell line were purchased from ATCC. Phorbol 12-myristate 13-acetate (PMA) was obtained from Sigma-Aldrich. The secretory transporter inhibitor monensin and the following antibodies were from Biolegend: phycoerythryin (PE)-Cy7 conjugated anti-CD14 and Brilliant Violet (BV605)-conjugated anti-CD3. PE-conjugated anti human CD19 was from BD Biosciences. Allophycocyanin-conjugated anti-ADM was from US Biological. Recombinant human ADM was purchased from GenScript, and human VEGF-A165 was from Peprotech.
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5

Lentiviral Transduction of CD34+ Cells

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CD34+ cells from three to ten distinct cord blood samples were pooled and transduced with lentiviruses (pRRLsin-PGK-eGFP-WPRE, Genethon, Evry, France) expressing the green fluorescent protein and either a short hairpin RNA targeting TET2 (shRNA-TET2, 5′- GGGTAAGCCAAGAAAGAAA -3′) or a scramble sequence (shRNA-scramble, 5′- GCCGGCAGCTAGCGACGCCAT -3′) as control23 (link). Twenty-four hours after transduction, 2 × 105 cells were intravenously injected to sublethally irradiated NSG female mice (6–8 weeks old). Mice were killed 15–17 weeks after injection, and repopulation of mouse bone marrow (femurs and tibias) by human cells was assessed by flow cytometry, using APC-conjugated mouse anti-human CD45, PE-conjugated anti-human CD19, PE-conjugated anti-CD33 (all from BD Pharmingen). Antibodies are listed in the Supplementary Information (Supplementary Table 14).
For NGS experiments and for secondary transplantation, bone marrow of repopulated mice was enriched in human cells using a mouse/human chimera isolation kit (Stem Cell Technologies).
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6

Characterization of MSCs and Microglia

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The MSCs were stained using the following mouse monoclonal antibodies: uorescein isothiocyanate (FITC)-conjugated anti-human CD90, phycoerythrin (PE)-conjugated anti-human CD105, allophycocyanin (APC)-conjugated anti-human CD73, FITC-conjugated anti-human CD44 (BD Biosciences), PE-conjugated anti-HLA-ABC (BD Biosciences), FITC-conjugated anti-HLA-DR (BD Biosciences), FITC-conjugated antihuman CD34 (BD Biosciences), PE-conjugated anti-human CD 11b (BD Biosciences), PE-conjugated antihuman CD 19 (BD Biosciences), and APC-conjugated anti-CD45 (BD Biosciences). Propidium iodide was used to identify and exclude the dead cells. The stained cells were acquired with a FACS Canto II ow cytometer (BD Biosystems) and analyzed using the FlowJo software (Tomy Digital Biology, Co. Ltd.). As for microglia, EYFP-expressing microglia were stained using APC-conjugated anti-mouse CD86 (BioLegend), PE-conjugated anti-mouse CD206 (ThermoFisher), and the Live/Dead™ xable near-IR dead cell stain kit (Invitrogen). The stained cells were acquired with a Gallios ow cytometer (Beckman Coulter) and analyzed using the FlowJo software (Tomy Digital Biology, Co. Ltd.). Three independent FACS experiments were performed.
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7

Immunophenotyping of B-cells

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The whole blood from subjects was incubated for an hour at room temperature with PE-conjugated anti-human CD19 (BD Biosciences) and FITC-conjugated anti-human CD40 (invitrogen). FITC-conjugated mouse IgG1 was used as isotype control. Then the blood was hemolyzed and fixed. The cells were analyzed in a Coulter, Epics XL flow cytometer (Beckman Coulter, Germany).
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