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4 protocols using il 17a elisa kit

1

Mouse Cytokine Profiling by ELISA

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Mouse cytokine levels in culture supernatants were determined by commercially available ELISA kits following the manufacturer’s instructions. The IL-17A ELISA kit was from R&D Systems. The IL-1β, IL-2, IL-4, IL-5, IL-6, IL-10, IL-12p40, TNF-α and IFN-γ BD OptEIA-Mouse ELISA Sets were from BD Biosciences Pharmigen.
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2

Cytokine Production Measurement Protocol

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Cells were harvested after indicated stimulation periods and supernatants were collected to measure cytokine production according to manufacturer’s instructions. IL-2 and IL-10 ELISA kits were obtained from eBioscience and IL-17A ELISA kit was obtained from R&D systems.
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3

Induction of Th17 Cells from Naive T Cells

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Splenic DCs were sorted to more than 95% purity using the CD11c Positive Isolation Kit (Miltenyi Biotec). Naive 2D2 T cells were isolated from the lymph nodes and spleens of 2D2 TCR transgenic mice using the CD4+CD62L+ T-cell isolation kit (Miltenyi Biotec). Co-culture of CD4+ T cells with splenic DCs has been described previously (29 (link), 30 (link)). Briefly, purified naive 2D2 CD4+ T cells were cultured with splenic DCs at a ratio of 5:1 in the presence of the MOG35–55 peptide (10 µg/ml), IL-6 (50 ng/ml; Peprotech), IL-1β (10 ng/ml; Peprotech), FICZ (6-formylindolo [3,2-b] carbazole; 300 nM; Biomol) and TGF-β (1 ng/ml; R&D Systems) or latent-TGF-β (50 ng/ml). For RGD blockade experiments, cRGD peptide was added at 4 µg/ml. For the co-culture assay, co-cultured cells were maintained in X-VIVO™ 15 Chemically Defined, Serum-free Hematopoietic Cell Medium (Lonza). The 2D2 T cells were analyzed by flow cytometry after 3 days of culture. Cytokines in the culture supernatants were measured using an IL-17A ELISA kit (R&D, USA). The activation of TGF-β was measured with the Plasminogen Activator Inhibitor-1 Promoter Luciferase Assay (details described below).
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4

Cytokine Expression in Autoimmune Rats

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Mononuclear cells from spleen were isolated from F1[21-3x283-2] rats at day 7, 14, 21 after immunization with MTB in IFA (n=4/time point). At each time point two non-immunized rats matched by age and gender, were taken along as control. The non-immunized rats (n=6) were pooled for all analyses. Cells were used either unstimulated or after ex vivo restimulation with 10 ng/ml PMA and 1 µg/ml ionomycin for 6 hours. Using splenocytes, mRNA expression was measured using Taqman assays (Thermo Fisher Scientific) for il17a (assay ID Rn01757168_m1), tnf (assay ID Rn99999017_m1) and ifng (assay ID Rn00594078_m1) with gapdh (assay ID Rn01775763_g1) as housekeeping gene. Data were analyzed according to the 2-ΔΔCT method (29 (link)). IL-17A, TNF, and IFNy protein secretion was measured by ELISAs in the culture supernatant stimulated for 24 hours (Thermo Fisher Scientific IL-17A ELISA kit #88-7170-88; R&D duoset IFNy ELISA #DY-585). Intracellular protein expression of IL-17A and IFNy (versus isotype control) by different lymphocyte subsets was assessed by FACS in splenocytes stimulated overnight (in the presence of 10 µg/ml Brefeldin for the final 4 hours). Data was recorded using a FACS Canto II and analyzed using FlowJo software.
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