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6 protocols using cd8 pe clone sk1

1

Cross-Reactive Antibody Flow Cytometry

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A series of commercially available human monoclonal antibodies that cross-react with NHP mononuclear cells were used in flow cytometry analyses, as described previously [11 (link), 13 (link), 14 (link)]. Briefly, 100 μL of whole blood from each sample was added to each 12-mm × 75-mm polystyrene test tube (Falcon, Lincoln Park, NJ) containing panel of monoclonal antibodies CD3 Percp (clone SP-34), CD8 PE (clone SK1), CD16 FITC (clone 3G8) and CD20 APC (clone L27) (all from BD Biosciences, San Diego, CA) and incubated for 15 min at room temperature in the dark. Red blood cells were lysed with 1× FACS lysing solution (Becton Dickinson, San Diego, CA), diluted according to the manufacturer's instructions. The samples were washed thoroughly in 1× phosphate-buffered saline (PBS) by centrifugation; cell sediments were then suspended in 1% paraformaldehyde buffer (300 μL), and cells were acquired on a 4-color flow cytometer (FACSCalibur; BD Biosciences, San Jose, CA). Lymphocytes that were gated on forward scatter versus side scatter dot plot were used to analyze CD3+, CD4+(CD3+CD8-),CD8+ (CD3+CD8+) T-CD16+ (NK cell), CD3+CD16+ (NKT) and CD20+ B-cell lymphocyte subsets with use of FlowJo software (Tree Star, Inc., Ashland, OR).
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2

Fluorochrome-Conjugated Antibody Panel

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Fluorochrome-conjugated monoclonal antibodies (mAbs) used included FITC-Mouse-IgG1 (clone X40), PE-Mouse-IgG1 (clone MOPC-21), APC-Mouse-IgG1 (clone SJ25C1), PerCP-Mouse-IgG1 (clone X40), APC-CD25 (clone 2A3), PerCP-CD4 (clone SK3), FITC-CD8 (clone 2D1), CD19-APC (clone SJ25C1), HLA-DR (clone L243), CD38-APC (clone HB7), CD3-FITC (clone SK7), CD16 + 56-PE (clone B73.1), CD45-PerCP (clone 2D1), CD4-FITC (clone SK3), CD8-PE (clone SK1) (BD Biosciences, San Jose, CA).
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3

Activation of Human PBMCs

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To peripheral blood mononuclear cells (PBMCs) (0.5 Mio/test), a final concentration of 0.75 ng/ml phorbol 12-myristate 13-acetate (PMA), 100 μg/ml apo-Bet v 1 in the presence or absence of 30 μm catechol (Sigma) and 10 μm iron was added. Controls included PMA alone or in the presence of 30 μm catechol (Sigma) and 10 μm iron. PMA concentration was determined in pre-experiments and considered optimal when cells were slightly down-regulating surface CD4+ expression (27 (link)). After 18 h supernatants were collected and stored at −80 °C until further analysis.
Cells were stained for 30 min at 4 °C with CD3-APC (clone SK7, eBioscience (Santa Clara, CA)), CD4-PE-Cy7 (clone SK3, BD Biosciences), and CD8-PE (clone SK1, BD Biosciences), in PBS containing 2% FCS followed by a 10-min incubation of annexin V FITC (BD Bioscience) and 7-amino-actinomycin D (eBioscience) in binding buffer (10 mm Hepes, 140 mm NaCl, 2.5 mm CaCl2) at room temperature. Acquisition and analysis were performed on a FACSCanto II machine (BD Biosciences) using the FACSDiva Software 6.0.
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4

Phenotypic Characterization of Activated T Cells

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Fifteen thousand DCs were prepared as described in 2.7 and cocultured with 150,000 autologous CD3+ T cells at a concentration of 1 × 106 T cells/ml. After 5 days of coculture, T cells were harvested, washed with PBS and stained for 15 min at the dark using the following anti-human mAbs: CD3 APC-H7 (clone SK7, BD Biosciences), CD4 Pe-Cy7 (clone SK-3, Thermofisher), CD8 PE (clone SK1, BD Biosciences), CD279/PD-1 APC (clone MIH4, Thermofisher), CD197/CCR7 Alexa Fluor 647 (clone G043H7; Biolegend), and CD45RA V500 (clone HI100; Biolegend). Unstimulated CD3+ T cells were used as negative control, and unstained CD3+ T cells were used as negative fluorescence control. At least 10,000 events of each sample were collected and analyzed at FACS Canto II Flow Cytometer (BD Biosciences).
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5

Stress-induced Biomarker Profiling

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Blood samples were drawn from the right arm before, from the left arm after the stress test using heparinized Vacutainer® vials, and centrifuged 15 min at 1000g, 4°C, and supernatants immediately stored at -80°C. Measurements were done in duplicates using enzyme-linked immunoassay (ELISA) kits according to the manufacturers′ instructions; noradrenaline and adrenaline: Labor Diagnostika Nord, Nordhorn, Germany (detection limits 20 pg/ml noradrenaline, 5.2 pg/ml adrenaline); serotonin: DLD Diagnostika, Hamburg, Germany (5 ng/ml); oxytocin: Enzo, Lausen, Switzerland (15 pg/ml); human platelet activation factor (PAF): Abbexa, Cambridge, United Kingdom (2.5 pg/ml); human prostaglandin D2 (PGD2): Bioassay Technology, Shanghai, China (5.02 ng/ml).
Blood cells were isolated from heparinized blood samples using Ficoll-Paque Plus 1.078 g/ml density gradient (GE Healthcare Biosciences, Uppsala, Sweden). PBMCs were deposited in a Neubauer chamber and counted using Primo Vert Microscope (Carl Zeiss, Germany). PBMC subpopulations were stained using the following fluorescent labelled antibodies: CD3-APC (clone SK7; eBioscience Inc.), CD4-PE-CY7 (clone SK3; BD Biosciences), CD8-PE (clone SK1; BD Biosciences) and CD14-FITC (clone MOPC-21; BioLegend), for 30 min at 4°C; after washing, 10.000 single cell events were acquired in BD FACSCanto II with FACSDiva Software (Becton Dickinson).
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6

Cytokine Response Assay Protocol

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Bovine beta-lactoglobulin, deferoxamine mesylate, ammonium iron (III) citrate, potassium ferrocyanide, dihidroxybenzene (catechol), dihydroxybenzoic acid (DHBA) were all purchased from Sigma (Sigma Aldrich, Steinheim, Germany). Ficoll-Paque PLUS was obtained from GE Healthcare (Uppsala, Sweden). IFNγ and IL13 ELISA kits were from ebiosciences (Santa Clara, CA). Antibodies were either purchased by ebioscience (CD3-APC clone SK7; 7AAD) or BD Bioscience (CD4-PE-Cy7, clone SK3; CD8-PE, clone SK1; Annexin V FITC).
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