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3 protocols using trimeric cd40l

1

Isolation and Activation of Immune Cells

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CD4+ T lymphocytes, B lymphocytes, and CD14+ monocytes were positively selected from PBMC using anti-CD4, -CD19, or -CD14 monoclonal antibody (MAb)-coated magnetic beads (Miltenyi Biotech). Immature DC (iDC) were derived from CD14+ monocytes cultured with 1,000 U/ml granulocyte-macroPHAge colony-stimulating factor (GM-CSF; Miltenyi Biotech) and 1,000 U/ml recombinant human interleukin-4 (rhIL-4) for 5 days in AIM-V medium, with additional GM-CSF and rhIL-4 added on day 3. Mature DC (mDC) were derived from iDC by the addition of 0.1 μg/ml trimeric CD40L (Enzo) on day 5 and cultured for an additional 2 days. Prior to coculture, CD4+ T cells and B cells were activated for 48 h with 10 U/ml IL-2 (Roche) and 2 μg/ml phytohemagglutinin (PHA; Sigma) or 1,000 U/ml rhIL-4 and 0.1 μg/ml trimeric CD40L (Enzo), respectively. CD4+ TN or TCM were treated with either 100 nM CCL-19 (R&D Systems) or 10 U/ml IL-2 and 2 μg/ml PHA for 48 h as previously described (12 (link), 15 (link)).
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2

Phosphorylation Profiling of Immune Cells

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For determination of phosphorylated proteins after CD40 stimulation, PBMCs were thawed and rested for 2 h and then either left unstimulated or stimulated with trimeric CD40L (100 ng/ml) (Enzo Life Sciences, Farmingdale, NY) for 15 min, performed concurrently with decoration with V450-coupled anti-CD19 (Catalog#: 560353, BD Biosciences). After incubation with BD Cytofix Fixation Buffer (Catalog#: 554655) for 10 minutes at 37°C;, followed by permeabilization in BD Phosflow Perm Buffer III (Catalog#: 558050) for 30 minutes on ice, cells were then stained with PE-Cy5-coupled anti-CD3 (BioLegend), FITC-coupled anti-pp38 (Catalog#: 4551, Cell Signaling Technology, Danvers, MA), PE-coupled anti-pp65 (Catalog#: 558423, BD Biosciences), or PE-coupled anti-pErk (Catalog#: 612566, BD Biosciences). The analysis was performed using an LSR II flow cytometer (BD Biosciences) and FlowJo 7.6.2 software (TreeStar, Ashland, OR).
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3

Phosphorylation Profiling of Immune Cells

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For determination of phosphorylated proteins after CD40 stimulation, PBMCs were thawed and rested for 2 h and then either left unstimulated or stimulated with trimeric CD40L (100 ng/ml) (Enzo Life Sciences, Farmingdale, NY) for 15 min, performed concurrently with decoration with V450-coupled anti-CD19 (Catalog#: 560353, BD Biosciences). After incubation with BD Cytofix Fixation Buffer (Catalog#: 554655) for 10 minutes at 37°C;, followed by permeabilization in BD Phosflow Perm Buffer III (Catalog#: 558050) for 30 minutes on ice, cells were then stained with PE-Cy5-coupled anti-CD3 (BioLegend), FITC-coupled anti-pp38 (Catalog#: 4551, Cell Signaling Technology, Danvers, MA), PE-coupled anti-pp65 (Catalog#: 558423, BD Biosciences), or PE-coupled anti-pErk (Catalog#: 612566, BD Biosciences). The analysis was performed using an LSR II flow cytometer (BD Biosciences) and FlowJo 7.6.2 software (TreeStar, Ashland, OR).
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