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28 protocols using anti ifn γ pe cy7

1

Multicolor Flow Cytometry Analysis of PBMC

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For secondary outcomes 1 to 4, peripheral blood mononuclear cells will be isolated and subjected to flow cytometric analysis as described previously by our group.[29 ] The monoclonal antibodies will be anti-CD4-AF700, anti-CD8-PE, anti-CD8-APC, anti-CD28-APC, anti-CD57-FITC, anti-IFN-γ-PE-Cy7, anti-TNF-α-APC, anti-IL-17A-APC, anti-granzyme B-PE, and anti-perforin-APC (all from eBioscience, San Diego, CA, USA). Permeabilized cells will be stained for intracellular cytokines and cytotoxic molecules using anti-IFN-γ-PE-Cy7 and anti-TNF-α-APC. Multicolor flow cytometry will employ a BD LSRFortessa flow cytometer (BD Biosciences, San Jose, CA, USA) and the data will be analyzed with aid of FlowJo V10 software (FlowJo, LLC, Ashland, OR, USA).
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2

Flow Cytometric Analysis of Cytokine Production

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Isolated splenocytes (1 × 106 cells/well) were stimulated for 1 h with 5 µg/ml MOMP in the presence of 1 µg/ml anti-CD28 and anti-CD49d mAbs (both BD Pharmingen, San Diego, CA, USA) in a total volume of 200 µl supplemented with RPMI 1640. The cells were subsequently incubated for 5 h at 37℃ after addition of 10 µg/ml brefeldin A (Sigma Aldrich) and 0.7 µl/ml monensin/Golgi-stop (BD Pharmingen). Following overnight storage at 4℃, the cells were washed in FACS buffer and stained with anti-CD4 (APC) and anti-CD44 (FITC) mAbs (BD Biosciences) in FACS buffer for 30 min at 4℃. Cells were washed with FACS buffer, permeabilized by using the Cyto-fix/Cyto-perm kit (BD Pharmingen) according to the manufacturer’s instructions, and stained intracellularly for 30 min at 4℃ using anti-IFN-γ (PE–Cy7) and anti-IL-17a (PerCP–Cy5.5) mAbs (eBiosciences, San Diego, CA, USA) in Perm wash buffer. After washing, the cells were re-suspended in FACS buffer and analysed by flow cytometry using a six-colour BD FACS Canto flow cytometer (BD Biosciences). Responses were analysed with the FlowJo software (Tree Star Inc., Ashland, OR, USA).
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3

Evaluating T-cell Subsets in Asthmatic Mice

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To evaluate the recruitment of Th1, Th2, and Tregs induced by ASCs treatment, LLN cells from OVA-induced asthmatic mice and ASCs-treated asthmatic mice were cultured in anti-CD3-coated plate for 6 h. To evaluate To evaluate CD4+CD25+Foxp3+ (Tregs) and IL-10+/CD4+ T cells, cells were stained with anti-CD4-FITC (0.5 mg/ml) and anti-CD25-APC (0.2 mg/ml) in accordance with the manufacturer’s recommendations (eBiosciences, San Diego, CA). After surface staining, the cells were permeabilized using a Cytofix/Cytoperm Kit (eBiosciences). After permeabilization, the cells were stained with anti-Foxp3-PE-cy7 or anti-IL-10-PE (eBiosciences).
To assess the Th1 and Th2 cell population, LLNs cells were stained with an anti-CD4-FITC Ab. After surface staining, the CD4+ T cells were stained with intracellular anti-IFN-γ-PE-cy7 (eBiosciences) and anti-IL-4-PE (eBiosciences) Abs. Fluorescence was measured using a FACS CantoII cytometer (BD Biosciences) equipped with Canto software (BD Biosciences).
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Analyzing T Cell Subsets in Asthma Model

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To evaluate the recruitment of Th1, Th2, and Treg induced by ASC sup treatment, the LLN cells of the OVA-induced animal model of acute asthma and ASC sup-treated animal model of acute asthma were cultured on anti-CD3-coated plates for 6 hours. To determine the CD4+CD25+Foxp3+ (Treg) and IL-10+/CD4+ T cell populations, the cells were stained with anti-CD4-FITC (0.5 mg/ml) and/or anti-CD25-APC (0.2 mg/ml) in accordance with the manufacturer’s recommendations (eBioscience, San Diego, CA, USA). After surface staining, the cells were permeabilized using a Cytofix/Cytoperm kit (eBioscience). After permeabilization, the cells were stained with anti-Foxp3-PE-cy7 or anti-IL-10-PE (eBioscience). To quantify the Th1 and Th2 cell populations, the LLN cells were stained with an anti-CD4-FITC antibody. After surface staining, the CD4+ T cells were stained with intracellular anti-IFN-γ-PE-cy7 (eBioscience) and anti-IL-4-PE (eBioscience) antibodies. Fluorescence was measured using a FACS CantoII cytometer (BD Biosciences) equipped with Canto software (BD Biosciences).
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Multiparameter Flow Cytometric Analysis of T-cell Subsets

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A single-cell suspension was prepared from blood sample or spleen sample. Blood cells were incubated with anti-CD3-PE and anti-CD19-PE-Cy7 monoclonal antibody (BD Biosciences, USA) at 4°C for 30 min. Spleen cells were incubated with anti-CD3-PE, anti-CD4-FITC, and anti-CD8-Percp-Cy5.5 monoclonal antibody (BD Biosciences, USA) at 4°C for 30 min. For intracellular staining, cells were fixed and permeabilized after surface staining, and anti-IL-4-APC and anti-IFN-γ-PE-Cy7 (eBioscience, USA) were then added to stain Th2 cells and Th1 cells. Stained cells were analyzed by flow cytometric analysis using a flow cytometer (ACEA NovoCyte 2060R, China).
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6

Functional Profiling of HIV-Infected T Cells

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The functional profile response of T cells was evaluated by measuring production of cytokines and effector molecules by flow cytometry. Approximately 1x105 of PBCMs treated with calcitriol or EtOH and infected with HIV-1 from Co-HC, were cultured for 24 hours, in presence of brefeldin (1ug/mL) and monensin (1ug/mL). Extracellular staining for CD4+ and CD8+ T cells was done, as previously described, and intracellular staining was performed using the antibodies anti-IL-2-FITC, anti-IFN-γ-PeCy7, anti-TNF-α-PerCp-Cy5.5, anti-MIP-1β-PE, anti-granzyme-FITC and anti-perforin-PE (eBioscience).
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7

Functional T Cell Analysis in Tumor Samples

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Mononuclear cells isolated from fresh tumor specimens were stimulated with 50 ng/ml of phorbol 12-myristate 13-acetate (PMA) + 1 μg/ml of ionomycin for 1 h followed by 3 h incubation with brefeldin A (BioLegend). Unstimulated cells were used as a control. The cells were then washed in PBS, stained with anti-CD3 Alexa Fluor 700 (EXBIO), anti-CD4 ECD (Beckman Coulter) and anti-CD8 HV500 (BD Biosciences), fixed using fixation/permeabilization buffer (eBioscience), permeabilized with permeabilization buffer (eBioscience) and intracellularly stained with an anti-IFN-γ PE-Cy7 (eBioscience), anti-granzyme B Brilliant Violet 421 (BD Biosciences) (Additional file 1: Table S4). The percentage of CD3+CD8+ T cells producing IFN-γ and degranulating upon PMA/ionomycin stimulation were determined by flow cytometry. The data were analyzed with the FlowJo software package (Tree Star, Inc.). Gating strategy is depicted in Additional file 1: Figure S4.
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8

T Cell Activation Assay with rF1-V and SA-4-1BBL

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4 × 106 lymphocytes from peripheral lymph nodes were plated in 0.5 ml in a 48 well-plate and stimulated with rF1-V protein (20 µg) and SA-4-1BBL (25 ng) and 20 U IL-2 for 24 hours. Wells without proteins served as negative controls. 1 µl/ml Golgi Plug (BD Pharmingen) was added during the last 4 h of incubation. Cells were surface stained with anti-CD4-Alexa700 (BD Biosciences; Cat. No. 557956), anti-CD8-APC-Cy7 (BD Biosciences; Cat. No. 557654) and anti-CD44-APC (eBiosciences; Cat. No. 17–0441-83) antibodies and fixed with 4% paraformaldehyde for 15 min. Following permeabilization, cells were stained with anti-IFN-γ-PE-Cy7 (eBiosciences; Cat. No. 25–7311-82) or isotype controls (eBiosciences; Cat. No. 12–4301-82, 25–4301-82, and 17–4031-82) and analyzed using flow cytometry (BD FACS LSR-II and FACSDiva software).
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9

Evaluating T-cell Subsets in Asthma

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To evaluate the recruitment of Th1, Th2, and Tregs induced by ASCs treatment, LLN cells from OVA-induced asthmatic mice and ASC-treated asthmatic mice were cultured in anti-CD3-coated plates for 6 h. To evaluate CD4+CD25+Foxp3+ (Tregs) and IL-10+/CD4+ T-cells, cells were stained with anti-CD4-FITC (0.5 mg/mL) and anti-CD25-APC (0.2 mg/mL) following the manufacturer’s recommendations (eBiosciences, San Diego, CA). After surface staining, cells were permeabilized using the Cytofix/Cytoperm Kit (BD Biosciences). After permeabilization, cells were stained with anti-Foxp3-PE-cy7 or anti-IL-10-PE (eBiosciences).
To assess the Th1 and Th2 cell populations, LLN cells were stained with anti-CD4-FITC Ab. After surface staining, CD4+ T-cells were stained with intracellular anti-IFN-γ-PE-cy7 (eBiosciences) and anti-IL-4-PE (eBiosciences) Abs. Fluorescence was measured using a FACS CantoII cytometer (BD Biosciences) equipped with Canto software (BD Biosciences).
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10

Intracellular Cytokine Expression Analysis

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For the analysis of intracellular cytokine expression T-cells were stimulated with phorbol myristate acetate (PMA), Ionomycin for 1 hour and Brefeldin A for 4.5 hours. All chemicals were obtained from Sigma-Aldrich (Munich, Germany). Cells were harvested and prepared for analysis using the Cytofix/Cytoperm kit (BD Bioscience, Heidelberg, Germany). For intracellular cell staining the following antibodies were used: anti-IL4-FITC, anti-IL17-APC, anti-IFNγ-PECy7, and anti-FOXP3-APC, obtained from eBioscience (San Diego, USA) and anti-Granzyme-PE (BD Bioscience, Heidelberg, Germany).
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