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5 protocols using apc cy7 conjugated anti cd4

1

Multicolor flow cytometry panel

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Fc receptors were blocked with Fcγ blocker (BioLegend, San Diego, CA, USA), and the surface markers were stained with BV450-conjugated anti-CD3 (BioLegend, clone:UCHT1), FITC-conjugated anti-CD19 (BioLegend, clone: HIB19), APC/Cy7-conjugated anti-CD20 (BioLegend, clone: 2H7), PE-conjugated anti-CD14 (BioLegend, clone: ΦM P9), PE-conjugated anti-CD11c (BioLegend, clone: B-ly6), PerCP/Cy5.5-conjugated anti-CD56 (BioLegend, clone: B159), FITC-conjugated anti-CD16 (BioLegend, clone:3G8), PE-conjugated anti-CD123 (BioLegend, clone: 6H6), and APC/Cy7-conjugated anti-CD4 (BioLegend, clone: RPA-T4). After fixing and permeabilization, IGBP1 was stained with Alexa 647-conjugated anti-IGBP1 (Novus Biologicals, Centennial, CO, USA).
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2

Multiparameter Flow Cytometry of Hematopoietic Cells

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The whole blood was stained with APC-conjugated anti-Ter119 and PE-conjugated anti-CD61 for erythrocyte and platelet analysis. White blood cells after RBC lyses were stained with PE-conjugated anti-CD8, PE-Cy7–conjugated anti-B220, APC-conjugated anti–Mac-1, APC-Cy7–conjugated anti-CD4, and Pacific blue (PB)–conjugated anti-Gr1 (BioLegend). Single cell suspensions from BM and spleen were stained with lineage-marker cocktail followed by FITC-conjugated anti-CD41, PE-conjugated anti-CD150, PE-Cy7–conjugated anti-CD48, APC-conjugated anti–c-Kit, BV421-conjugated anti–Sca-1, and streptavidin-APC-Cy7. For progenitor analysis, cells were stained with lineage-marker cocktail followed by FITC-conjugated anti-CD34 (BD), PE-conjugated anti-CD16/32, APC-conjugated anti–c-Kit, BV421-conjugated anti–Sca-1, and streptavidin-APC-Cy7 antibodies (BioLegend). For megakaryocytes and erythrocyte precursor analysis, cells were stained with FITC-conjugated anti-CD42c (Emfret), Dylight-647–conjugated anti-αIIbβ3 (CD41/61; Emfret), PE-conjugated anti-CD71, and APC-conjugated anti-Ter119. Analyses were performed on an LSRFortessa (BD) or CyAn ADP Analyzer (Beckman Coulter), and results were analyzed with FlowJo software.
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3

Flow Cytometric Analysis of Tfh Subsets and Plasma Cells

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We isolated peripheral blood mononuclear cells (PBMCs) from the blood samples using density-gradient centrifugation on Ficoll-Paque. Single-cell suspensions were treated with fixable viability stain 510 (BD Bioscience, 564406) for half an hour, followed by staining with the following antibodies to distinguish the Tfh subsets: FITC- conjugated anti-CD45RA (BioLegend, N418), PE-conjugated anti-CCR6 (BioLegend, G034E3), PerCP/Cy5.5-conjugated anti-CXCR5 (BioLegend, J252D4), PE/Cy7-conjugated anti-CXCR3 (BioLegend, G025H7), APC-conjugated anti-PD-1 (BioLegend, EH12.2H7), and APC/Cy7- conjugated anti-CD4 (BioLegend, RPA-T4). For the detection of circulating plasma cells, PBMCs were stained with FITC-conjugated CD27 (BioLegend, M-T271), PE-conjugated IgD (BioLegend, W18340F), PerCP/Cy5.5-conjugated anti-CD19 (BioLegend, HIB19), and APC-conjugated CD38 (BioLegend, HB-7), followed by the treatment with fixable viability stain 510. Cell acquisition was performed using a CantoII cytometer (BD Bioscience). Data were analyzed with Diva (BD) software.
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4

Isolation and Analysis of Tumor-Infiltrating Lymphocytes

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Fresh tumors obtained from mice were cut into pieces (3–5 mm3) and treated with collagenase I (1 µg/mL) and collagenase IV (1 µg/mL) for 1.5 hours at 37°C. The tissue homogenates were filtered using a 70 µm cell strainer (Falcon) before centrifugation. The samples were subjected to density gradient centrifugation using Ficoll-Paque PLUS density gradient media. The supernatant was discarded and the cells were suspended in an appropriate medium. The samples were centrifuged to obtain tumor-infiltrating lymphocytes (TILs). The TILs were stained with FITC-conjugated anti-CD3 (BioLegend), APC-Cy7-conjugated anti-CD4 (BioLegend), PE-conjugated anti-CD8 (BioLegend), PerCP-conjugated anti-CD45.1 (BioLegend), and APC-conjugated anti-interferon gamma (IFNγ) (BioLegend) antibodies. The stained samples were analyzed using a BD FACS Canto II (BD Biosciences) cytometer.
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5

Murine T Cell Phenotyping and Activation

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TCDD was kindly provided by Dr. Steve Safe (Institute of Biosciences & Technology, Texas A&M Health Sciences Center, College Station, Texas). FICZ was purchased from Enzo Life Sciences (Farmingdale, NY). Both TCDD and FICZ were dissolved in DMSO and diluted in corn oil for use. Sodium butyrate, corn oil, and mBSA were purchased from Sigma-Aldrich (St. Louis, MO). RPMI 1640, l-glutamine, penicillin-streptomycin, HEPES, PBS, and FBS were purchased from Invitrogen Life Technologies (Carlsbad, CA). Fluorophore labeled monoclonal antibodies (mAbs), such as BV785-conjugated anti–CD45, FITC–conjugated anti-CD3, APC/cy7-conjugated anti-CD4, and Alexa Fluor 700-conjugated anti-CD8 used for the flow cytometry, were purchased from Bio Legend (San Diego, CA) and Thermo Fisher (Grand Island, NY). For FoxP3 staining, we used FoxP3 Transcription Factor Buffer Set, and for IL-17 we used intracellular (IC) Fixation and Permeabilization Buffer from Thermo Fisher (Grand Island, NY).
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