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46 protocols using cd25 fitc

1

Evaluating MSC Induction of Tregs

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To assess the capacity of MSCs to induce the generation of T-regulatory (Treg) cells, PBMC-MSC cocultures have been set up. In short, 500 × 103 PBMCs from five different donors obtained by Ficoll gradient centrifugation were plated in the presence of 50,000 allogeneic MSCs in RPMI 10% FBS with IL-2300 U/ml in a 24-multiwell flat-bottomed plate for 1 week of culture [36 (link)]. At day 7, PBMCs were harvested and analyzed by flow cytometry after incubation with the following conjugated monoclonal antibodies: CD25 FITC, CD127 PE, CD4 APC, CD3 PECy7 and CD45 APCCy7 (Becton Dickinson). Treg cell induction by MSCs was evaluated as the percentage of CD25High/CD4+/CD127Low/− PBMCs [37 (link)].
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2

Flow Cytometry Profiling of Lymphocyte Subsets

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Flow cytometry analysis was performed to quantify lymphocyte subsets on BD LSR II flow cytometer with BD FACS DIVA software (BD Biosciences, Heidelberg, Germany). The following antibodies were used for phenotypic analysis: CD45-FITC, CD19/20-PE, CD14-Cy-7, CD25-FITC, CD127-PE, CD45RA-APC, CD3-APC Cy-7, CD8-FITC, CD4-PE, CD4-APC Cy7, CD8-APC Cy7, CD62L-FITC, CCR7-PE, CD27-FITC, CD62L-PE, (Beckton Dickinson, Franklin Lakes, NJ, USA), CD3-ECD, CD56-APC, CD45RO-ECD (Beckman Coulter, Miami, FL, USA).30 (link)
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3

Multicolor Flow Cytometry Immunophenotyping

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CD4-PE, CD25-FITC, CD127-APC, FITC-lineage-cocktail (CD3, CD14, CD16, CD19, CD20, CD56), HLA-DR-PerCP, CD123-PE, CD11c-APC, CD3-PE-Cy5, CD4-FITC, CD8-PE, mouse isotype controls, and lysis solution were purchased from Becton Dickinson (Franklin Lakes, NJ, USA).
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4

Flow Cytometry Profiling of Lymphocyte Subsets

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Flow cytometry analysis was performed to quantify lymphocyte subsets on BD LSR II flow cytometer with BD FACS DIVA software (BD Biosciences, Heidelberg, Germany). The following antibodies were used for phenotypic analysis: CD45-FITC, CD19/20-PE, CD14-Cy-7, CD25-FITC, CD127-PE, CD45RA-APC, CD3-APC Cy-7, CD8-FITC, CD4-PE, CD4-APC Cy7, CD8-APC Cy7, CD62L-FITC, CCR7-PE, CD27-FITC, CD62L-PE, (Beckton Dickinson, Franklin Lakes, NJ, USA), CD3-ECD, CD56-APC, CD45RO-ECD (Beckman Coulter, Miami, FL, USA).30 (link)
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5

Comprehensive Immune Phenotyping of PBMC

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Immune activation and differentiation were quantified as previously described [54] (link). In brief, one million thawed PBMC were stained with either an activation or differentiation panel for 15 minutes at 37°C prior to fixation in formaldehyde. Both panels included CD3 V450 (Becton Dickinson); CD4 PE-Texas Red (Invitrogen); CD8 Qdot605 (Invitrogen). Activation panel included HLA-DR FITC; PD-1 AF647; CD38 PE; CCR5 PE-Cy5; 45RA PE-Cy7 (all Becton Dickinson); CCR7 APC eFluor-780 (eBioscience). Differentiation panel included CD45RA PE; CD28 PE-Cy5; CCR7 PE-Cy7; CD31 FITC (all Becton Dickinson); CD57 AF647 (Biolegend); CD27 AF780 (eBioscience). For Tregs, PBMC were surface stained with CD4 PerCP, CD127 PE and CD25 FITC (all Becton Dickinson) followed by intracellular staining using eBioscience FoxP3 staining kit and FoxP3 APC as per manufacturer's instructions. Data was acquired on a BD LSR-Fortessa and analysed using FlowJo version 10.
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6

Immune Cell Characterization by Flow Cytometry

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The procedure used in this study has been published previously (14 (link),26 (link)). Briefly, the following anti-mouse monoclonal antibodies were purchased from BD Biosciences: Ly6G-peridinin chlorophyll protein (PerCP)-Cy5.5 (1A8; 560602), Ly6C-fluorescein isothiocyanate (FITC) (AL-21; 553104), CD4-allophycocyanin (APC) (RM4-5; 553051), CD25-FITC (7D4; 553071), and CD19-APC (1D3; 550992). The following antibodies were purchased from BioLegend: CD45-FITC (30F-11;103108), CD45-PerCP-Cy5.5 (30F-11;103132), CD45-brilliant violet (BV510) (30F-11;103138), CD11b-APC/Fire750 (M1/70;101262), CD244-Alexa Fluor 647 (2B4;133509), F4/80-phycoerythrin (PE) (BM8;123110), PD-L1-BV421 (10F.9G2;124315), CD8a-APC/Fire 750 (53-6.7;100766), CD8a-PE (53-6.7; 100708), CD127-BV510 (A7R34;135033), CD1d-PE (1B1;123509), and CD5-BV421 (53-7.3;100618). The isolated immune cells were stained in a 96-round-bottom-well plate for 20 min at 4°C and washed with PBS containing 1% bovine serum albumin. Sorting of Ly6G+CD244+ and Ly6G+CD244 cells was conducted on a FACSAria instrument (BD Biosciences). Flow cytometric data were obtained by a FACS Verse instrument (BD Biosciences) and analyzed by FlowJo software (TreeStar, Inc.). CD45-gated cells were analyzed in this study.
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7

Multiparametric Flow Cytometry Analysis

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The presence of CD14, CD25, CD28, CD45, CD61, CD90, TLR1 and TLR4 were analyzed using a flow cytometer (CYTOMICS FC 500, Beckman Coulter, Miami, FL) according to manufacturer's instruction. Anti-CD14-PE-Cy7, CD25-FITC, TLR4-PE, CD28-PE, CD61-PE, CD90-FITC and CD45-APC were purchased from (BD Biosciences) ; anti-TLR1-PE was purchased from (eBioscience).
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8

Multiparameter Flow Cytometry Analysis

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Cells from the bone marrow, thymus, spleen, liver, and peripheral blood were stained and analyzed on a FACSCanto (BD Biosciences) running FACSDiva (v.6.1.3) and FlowJo (v.7.6.1, FlowJo LLC) software. Lymphocytes were identified and gated based on their forward-scattered light (FSC) and side-scattered light (SSC) profiles. Cell suspensions were treated with ACK lysis buffer (150 mmol/L NH4Cl, 10 mmol/L KHCO3, and 0.1 mmol/L disodium EDTA) and then stained with the following conjugated antibodies: B220-APC-Cy7 (BD Biosciences), CD2-FITC (BD Biosciences), CD3ε-PE (BD Biosciences), CD3ε-Alexaflore 647 (BD Biosciences), CD4-FITC (Caltag Laboratories), CD8a-APC (Caltag Laboratories), CD8a-Alexaflore 647 (BD Biosciences), CD25-FITC (BD Biosciences), CD44-PE (BD Biosciences), CD45-APC (BD Biosciences), Ki-67-FITC (BD Biosciences), Ly5.1-PerCP-Cy5.5 (BD Biosciences), Ly5.2-PerCP-Cy5.5 (BD Biosciences), NK1.1-APC (Caltag Laboratories), and Sca1-Alexaflore 647 (BD Biosciences).
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9

Mesenchymal Stem Cell Surface Antigen Profiling

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The cellular differentiation analysis was performed using flow cytometry. To analyze the cell surface antigen expressions, the cells after third passage was used. MSCs were incubated with antibodies for rat CD90 FITC (BD Biosciences, San Diego, CA, USA), CD 29 FITC (BD Biosciences, San Diego, CA, USA), CD106 PE (BD Biosciences, San Diego, CA, USA), CD54 PE (BD Biosciences, San Diego, CA, USA) at room temperature in the dark. Control antibodies were FITC Rat IgG2a, K isotype controls and IgG1 PE isotype controls (BD Biosciences, San Diego, CA, USA). Negative markers were CD3 PE (BD Biosciences, San Diego, CA, USA), CD4 APC (BD Biosciences, San Diego, CA, USA), CD25 FITC (BD Biosciences, San Diego, CA, USA), CD45 FITC (BD Biosciences, San Diego, CA, USA), CD8B FITC (BD Biosciences, San Diego, CA, USA).
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10

Characterization of Activated T Cells in RA

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Previously frozen PBMCs from RA subjects were cultured at 5 × 106 total cells/well within a 24 well plate in RPMI-1640 + 10% pooled human serum with 10 µg/ml of peptide. IL-2 (Novartis) was added at 325 IU/ml on day 6. After 14 days cells were stained for expression of CD25 FITC (BD), CD4 PerCP (BioLegend), Annexin V APC (BD), CD14 APC (BioLegend), CD19 APC (BioLegend), and tetramer before being run on a FACSCalibur. The data was analyzed by FlowJo software version 9.6.2 (Tree star).
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