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6 protocols using αil 17a

1

XAGE-1b Specific T-cell Responses

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Following in vitro stimulation, CD4+ and CD8+ T cells were cultured for 14 days and then assessed for XAGE-1b specific T-cell responses. Cultures were collected and stimulated in the presence or in the absence of the XAGE-1b peptide pool (2 μM) and tested in a standard 4hr intracellular cytokine staining (ICS), using fluorescent-conjugated cytokine-specific antibodies αCD4 (BD Biosciences), αCD8 (BD Biosciences), αIL-17A (eBioscience) and αIFN-γ (BD Biosciences). The cytokine expression profile was then assessed by flow cytometry (FACSAria II, BD Biosciences).
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2

IL-17A Inhibition in Vaccinated Mice

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Purified monoclonal anti-mouse IL-17A (αIL-17A; eBioscience) was prepared using endotoxin-free PBS. Vaccinated mice were injected with 100 μg (100 μL i.p.) of αIL-17A 2 days before infection. The vaccinated and nonvaccinated control groups were injected with the nonspecific isotype control IgG (100 μg i.p.).
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3

Flow Cytometry Antibody Panel Protocols

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The following antibodies were obtained from eBioscience: Allophycocyanin-(αB220 [RA3-6B2], αCD11c [N418]), eFluor 450-(αCD45 [30-F11], αCD45.1 [A20]), eFluor 506-Fixable Viability, eFluor 780-Fixable Viability, FITC-(αGM-CSF [MP1-22E9], αMHCII [M5/114.15.2]), PE-αCD4 [RM4-5], PE-Cy7-(αCD44 [IM7], αCD11b [M1/70], αCD4 [RM4-5]), and PerCP-Cy5.5-(αIL-17A [eBio17B7], αCD11c [N418]). The following antibodies were obtained from BD Biosciences: Allophycocyanin-Cy7-(αIFNγ [XMG1.2], α-Ly6G [1A8]). PE-labeled MOG38-49 tetramers were obtained from the NIH Tetramer Core Facility. rmIL-23 and rmIL-1α were obtained from R&D Systems. αGM-CSF (22E9.11), αIFNγ (XMG1.2), and αCD16/32 (2.4G2) were produced in house via hybridoma. 500µg of αGM-CSF or whole rat IgG (Sigma Aldrich) was administered i.p. every other day, beginning at time of immunization or T cell transfer, during blocking experiments. 100µg of αCD20 (clone 5D2, Genentech) or mouse IgG2a (clone C1.18.4, Bio X cell) was administered i.p. every other day, beginning at time of T cell transfer, in B cell depleting experiments.
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4

Monoclonal Antibody-Induced Cytokine Inhibition

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Monoclonal antibodies were applied to the vaccinated group to induce the functional inhibition of IFN-γ or IL-17A. Purified monoclonal anti-mouse IFN-γ (αIFN-γ; eBioscience; 16-7311-85) or anti-mouse IL-17A (αIL-17A; eBioscience; 16-7173-85) was prepared using endotoxin-free PBS. Two days before infection, vaccinated mice were injected with 100 μg (i.p.; 100 μL) of αIFN-γ, αIL-17A, or both. The vaccinated and nonvaccinated control groups were injected with the nonspecific isotype control IgG [100 or 200 μg (i.p.)] at doses comparable to those administered to the single inhibition group and the combined treatment group.
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5

Investigating AhR Signaling in T-Cell Activation

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The following materials were used: AHR agonist FICZ (6-formylindolo[3,2-b]carbazole, BIOMOL, Plymouth Meeting, PA, USA,); AHR antagonist CH223191 (1-Methyl-N-[2-methyl-4-[2-(2-methylphenyl)diazenyl]phenyl-1H-pyrazole-5-carboxamide, Tocris Bioscience, Ellisville, MO, USA); anti-CD3 and anti-CD28 (eBioscience, San Diego, CA, USA) benzo[b]fluoranthen, phorbol-12-myristate-13-acetate (PMA), ionomycin, methylated bovine serum albumin (mBSA), complete Freund’s adjuvant (CFA)with 1 mg/ml of Mycobacterium tuberculosis and RPMI 1640 medium (all from Sigma-Aldrich, St. Louis, MO, USA), α-IL-17a (eBioscience, anti-mouse IL-17A functional grade purified, Clone: eBioMM17F3).
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6

Multiparametric Flow Cytometry Analysis

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Cells were labeled with fluorescence antibodies for mouse α-CD4, α-CD8, α-INF-γ, α-IL-2, α-IL-10, α-IL-4, α-IL-17A, α-CD44, and α-CD62L (eBioscience, CA). To assess immune responses after transplantation, total splenocytes or isolated CD4+ T cells were seeded on 48 well plates and stimulated in complete media for 4 hrs at 37°C with phorbol 12-myristate 13-acetate (PMA; 50 ng/ml; Sigma-Aldrich), Ionomycin (500ng/ml; Sigma-Aldrich) and Brefeldin A (eBioscience). Thereafter, cells were fixed, permeabilized and stained with respective antibodies at a concentration of 1–5 μg per 106 cells. Flow cytometry measurements were performed on a FACS Canto II (BD Bioscience, CA, USA) and data were analyzed using FlowJo (FlowJo Software, OR, USA).
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