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4 protocols using cd3 apc cy7

1

Naïve T Cell Proliferation Assay with Mucosal APCs

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Blood naïve T cells were purified after ficoll gradient using the Naïve Pan T Cell Isolation Kit (Miltenyi Biotec) and stained with Cell Proliferation Dye eFluor-670 (eBioscience) as recommended by the manufacturer. Purified mucosal CD1a+ or CD14+ were plated with naïve T cells (1:15) in round-bottom 96-well plates, in Xvivo 15 media (Invitrogen) supplemented with 10% human AB serum (Valley Biomedical). After 6 days in culture, proliferation of T cells was assessed by flow cytometry after staining with zombie yellow dye (Biolegend) and CD3-APC-Cy7 (Tonbo). As a control, blood monocyte-derived DC were generated in vitro with IL-4 and GM-CSF66 (link) after CD14+ selection as previously described16 (link).
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2

Murine Splenocyte Immune Profiling

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Mouse splenocytes were cultured in a complete RPMI-1640 medium (GenDEPOT, Katy, TX, USA) supplemented with fetal bovine serum (10%, Hyclone, South Logan, UT, USA) and 1% penicillin/streptomycin (Welgene, Gyeongsan, Korea). Anti-mouse TCR-β-PE, CD45.1-Percp Cy5.5, CD3-APC Cy7, CD8-FITC, CD44-PE, and IFN-γ-FITC antibodies as well as CFSE cell proliferation tracing dye were purchased from Tonbo Bioscience (San Diego, CA, USA). Anti-mouse TNF-α-PE Cy7, APC-conjugated streptavidin, and PE-conjugated streptavidin were purchased from Biolegend (San Diego, CA, USA). Gp33-41 class I pMHC tetramer was provided by the NIH Tetramer Core Facility (Atlanta, GA, USA).
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3

Naïve T Cell Proliferation Assay with Mucosal APCs

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Blood naïve T cells were purified after ficoll gradient using the Naïve Pan T Cell Isolation Kit (Miltenyi Biotec) and stained with Cell Proliferation Dye eFluor-670 (eBioscience) as recommended by the manufacturer. Purified mucosal CD1a+ or CD14+ were plated with naïve T cells (1:15) in round-bottom 96-well plates, in Xvivo 15 media (Invitrogen) supplemented with 10% human AB serum (Valley Biomedical). After 6 days in culture, proliferation of T cells was assessed by flow cytometry after staining with zombie yellow dye (Biolegend) and CD3-APC-Cy7 (Tonbo). As a control, blood monocyte-derived DC were generated in vitro with IL-4 and GM-CSF66 (link) after CD14+ selection as previously described16 (link).
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4

Multicolor Flow Cytometry Analysis

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Mixed cell suspensions, either freshly isolated or hormone-treated, were stained for surface markers with the following mouse anti-human antibodies: CD45-VioletFluor 450, CD3-APC-Cy7, CD8-FITC, CD11b-PE (Tonbo Biosciences, San Diego, CA), CD3-APC, CD163-APC, CD11c-PerCp-Cy5.5 (BioLegend Inc., San Diego, CA), PD-L1-PE-Cy7, PD-1-PerCp-Cy5.5 (BD Biosciences, San Jose, CA), CD4-PE (eBioscience, San Diego, CA). Analysis was performed on MACSQuant flow cytometer (Miltenyi Biotec) using MACSQuantify software and data were analyzed with FlowJo software (Tree Star, Inc., Ashland, OR). Expression of surface markers was measured by the percentage of positive cells and the mean fluorescence intensity (MFI).
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