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4 protocols using anti ifnγ

1

Differentiation of Naïve CD4+ T Cells

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WT and Stat3WT/GOF naïve CD4+ T cells were purified using the “Naïve CD4+ T Cell Isolation Kit” (Miltenyi Biotec, Cat. 130-104-453), cultured in supplemented RPMI (Th0, Th1, and Treg) or supplemented IMDM (Th17) media, and stimulated with plate-bound anti-CD3 (2.5ug/mL; BioXCell, 145-2C11) and soluble anti-CD28 (1ug/mL; SouthernBiotech, PV-1). T cell differentiation conditions: Th1, anti-IL-4 (10ug/mL; BioXCell, 11B11), murine IL-2 (50ng/mL; PeproTech, Cat. 212–12), and murine IL-12 (10ng/mL; R&D Sysemts, Cat. 419-ML-010); Treg, anti-IL-4, anti-IFNγ (10ug/mL; BioXCell, R4-6A2), murine IL-2, and human TGF-β (2.5ng/mL; PeproTech, Cat. 100–21); classical Th17, anti-IL-4, anti-IFNγ, human TGF-β, and murine IL-6 (30ng/mL; PeproTech, Cat. 216–16); pathogenic Th17, anti-IL-4, anti-IFNγ, human TGF-β, murine IL-1β (20ng/mL; Miltenyi Biotec, Cat. 130-094-053), and murine IL-23 (20ng/mL; R&D Systems, Cat. 1887-ML-010); Th0, anti-IL-4, anti-IFNγ, and IL-2. On day 5, cells were stimulated with phorbol-12-myristate-13-acetate (PMA; 50ng/mL; Sigma-Aldrich, Cat. 5.00582), ionomycin (1ug/mL; MilliporeSigma, Cat. 407950), and GolgiPlug Protein Transport Inhibitor (1:1000; BD Biosciences, Cat. 555029) and then stained for flow cytometry.
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2

Differentiation of T Helper Cell Subsets

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For differentiation into T helper cell 1/2 subsets, CD4+ T cells were incubated for 96 h in cell culture plates covered with anti‐human CD3 (#300437, BioLegend, San Diego, CA) using TexMACSTM medium. Cells were stimulated with T Cell TransActTM human as described above. Specific cytokines were added for Th1 differentiation (anti‐human CD28 [0.5 µg/ml; #302933, BioLegend, San Diego, CA], IL2 [100 U/ml], IL12 [50 ng/µl], and anti‐IL4 [20 ng/µl; #130 097 742 | #130‐096‐704 | # 130‐095‐709, Miltenyi Biotec, Bergisch Gladbach, Germany]) and for Th2 differentiation [anti‐human CD28 (0.5 µg/ml), IL2 (100 U/ml), IL4 (50 ng/ml), anti‐IFNγ (50 ng/ml), and anti‐IL12 (50 ng/ml; #130 097 742 | #130‐096‐753 | #130 095‐743 | # 130‐103‐738, Miltenyi Biotec, Bergisch Gladbach, Germany)], respectively. After 4 days, the cell suspensions were transferred to an uncovered cell culture plate and incubated for another 2 days with the same supplements except anti‐human CD28.
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3

NK Cell Immunophenotyping and IFN-γ Analysis

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REAfinityTM Recombinant Antibodies (Miltenyi Biotec, Bergisch Gladbach, Germany) were used for NK cell monitoring. Anti-CD56-FITC, CD3-PE-Vio770, CD45-VioBlue, CD16-PE were used to identify CD56dim and CD56 bright NK cells. The four stages were discriminated by using CD11b-APC-Vio770 and CD27-APC. ABCC3 expression was assessed before and after each vaccination as previously described [17 (link)], by using a primary antibody anti-ABCC3 (Thermo Fisher Scientific, Waltham, MA, USA) and a secondary anti-rabbit Alexa Fluor488 antibody (Abcam) according to manufacturer’s instructions. PBLs were then fixed and permeabilized using the Cytofix/Cytoperm solution (BD Biosciences, Franlin Lakes, NJ, USA) and intracellularly stained with an anti-IFN-γ (Miltenyi Biotec) antibody. NK cells were gated and then analyzed by flow cytometry for IFN-γ assessment. Acquisition of stained samples was performed using a MACSQuant (Miltenyi Biotec) flow cytometer, and data were analyzed using Flowlogic software (version 7.2, Miltenyi Biotec).
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4

Stimulation and Intracellular Cytokine Staining

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Total IELs or peripheral blood lymphocytes (PBLs) were stimulated with phorbol 12-myristate 13-acetate (PMA, 25 ng/mL; Sigma-Aldrich, St. Louis, MO) and ionomycin (1 µg/mL; Merck Millipore, Darmstadt, Germany) in the presence of Brefeldin A (10 µg/mL; Sigma-Aldrich) for 4 h at 37°C in a 5% CO 2 atmosphere. Cells were fixed and permeabilized with use of the Inside Stain Kit (Miltenyi Biotec, Gladbach, Germany) and then stained with anti-IFNγ, anti-IL-17A (Miltenyi Biotec), and anti-IL-22 (eBioscience, San Diego, CA) monoclonal antibodies.
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