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5 protocols using pacific blue ifnγ

1

Flow Cytometry Analysis of IFNγ-expressing T cells

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Cells were resuspended in staining buffer (BD biosciences). After being fixed and penetrated, cells were stained with PE-CD3 (130-117-139, 1:50, Miltenyi Biotec) and Pacific blue-IFNγ (BioLegend, #505817, Rat, 1:50). Samples were analyzed by flow cytometry (BD Immunocytometry System) and FlowJo software [29 (link)].
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2

Flow Cytometric Analysis of T Cell Activation

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The cells were made into a single-cell suspension and resuspended in staining buffer (BD Biosciences, Franklin Lakes, NJ, USA). T cells were cultured with PerCP-CD3 (1:100, BioLegend, San Diego, CA, USA, #100326, Armenian hamster) and fixed and permeabilized with Pacific blue-IFN-γ (1:50, BioLegend, San Diego, CA, USA, #505817, rat). Subsequently, the cells were detected with a BD FACS Canto II flow cytometer (BD Immunocytometry Systems, San Jose, CA, USA) and analyzed with FlowJo software.
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3

Quantifying PD-L1 and IFNγ in Cells

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The cells were made into single-cell suspension, and resuspended in dye buffer solution (BD Biosciences, Franklin Lakes, NJ, United States). AGS cells were incubated with APC-PD-L1 (#329708, Mouse, 1:50, Biolegend, San Diego, CA, United States). The T cells were incubated with PerCP-CD3 (#100326, Armenian Hamster, 1:100 Biolegend) and Pacific blue-IFNγ (#505817, Rat, 1:50, Biolegend) that was pre-fixed and pre-permeabilized. Cell apoptosis was assessed using a flow cytometer BD FACS CantoII (BD Immunocytometry Systems, Franklin Lakes, NJ, United States) and analyzed by Flow Jo software.
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4

Peptide Library Synthesis and Liposome Formulation

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Trp2, AH1 and WT1 peptide libraries and peptides were synthesized by GenScript. CoPoP was synthesized as previously reported (32 (link)). The following lipids were used to produce liposomes: dioleoylphosphatidylcholine (DOPC; Corden #LP-R4–070), cholesterol (PhytoChol; Wilshire), and synthetic PHAD-3D6A (Avanti; #699855). QS-21 was purchased from Desert King (part number NC0949192). The APC-CD8a (Clone: CT-CD8a) antibody was obtained from Accurate Chemical and Scientific Corporation (#ACL168APC). The following antibodies were obtained from BioLegend: APC-CD8a (Clone: CT-CD8a; #100712), FITC-CD4 (Clone: GK1.5; #100405), AF700-CD45 (Clone: 30-F11; #103127), APC-Cy7-CD44 (Clone: IM7; #103027), PE/Cy7-CD62L (Clone: MEL-14; #104417), PerCP-Cy5.5-PD-1 (Clone: RMP1–30; #109119), pacific blue-IFN-γ (Clone: XMG1.2; #505818), BV605-TNF-α (Clone: MP6-XT22; #506329), PE/Cy7-Granzyme B (Clone: QA16A02; #372213). Anti-mouse PD-1 (#BP0146) and anti-mouse CTLA-4 (#BP0131) were acquired from Bio X Cell. Other reagents used were Golgiplug/Brefeldin A (BD; #555029), Live/Dead dye (Invitrogen; #L34857), Fc-block (Clone: 2.4G2; BD #553142), fixation/permeabilization kit (BD #554714), red blood cell (RBC) lysis buffer (BioVision #5830), Collagenase Type I (Gibco #17018–029), and DNase I (Roche #04536282001).
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5

Flow Cytometry Analysis of IFN-γ in Jurkat T Cells

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The cells were dispersed into a single-cell suspension and resuspended in staining buffer (BD, New Jersey, USA) while T cells (Jurkat) were treated with PE-CD3 (130-117-139, 1 : 50, Miltenyi Biotec, Bergisch Gladbach, Germany), fixed, permeabilized, and stained with Pacific blue-IFN-γ (BioLegend, San Diego, CA, #505817, rat, 1 : 50), followed by detection utilizing flow cytometer BD FACS Canto II (Immunocytometry Systems, BD, New Jersey). Acquired data were analyzed by the Flow Jo software [21 (link)].
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