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7 protocols using legendplex cloud based data analysis software

1

Cytokine and Chemokine Profiling in Blood Samples

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Supernatants from whole-blood stimulation, monocytes and AMLs, and plasma, serum and BAL samples were assessed by ELISA to determine their IL-12p40 (#DP400, R&D Systems), IFN-γ (#DIF50, R&D Systems), CCL-2 (#438804, BioLegend), CCL-8 (#442204, BioLegend) or CCL-13 (#442004, BioLegend) content, in accordance with the kit manufacturer’s protocol. Plasma and BAL samples were also analyzed for the presence of inflammatory cytokines and chemokines with the following LEGENDplex assays (all from BioLegend): Human Inflammation Panel 1 (#740809), Human Inflammation Panel 2 (#740883), Human Proinflammatory Chemokine Panel 1 (#740985) and Human Proinflammatory Chemokine Panel 2 (#741183) according to the manufacturer’s instructions. Samples were analyzed by flow cytometry on a Gallios flow cytometer. Data analysis was performed with LEGENDplex Cloud-based Data Analysis Software (BioLegend). All plasma, serum and BAL samples were obtained from patients and controls at infection-free time points (culture and PCR negative).
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2

Cytokine Profiling in Vaccinated Mice

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Cytokine levels in bronchoalveolar lavage (BAL) fluid obtained from vaccinated mice were analyzed by bead-based multiplex assay (LEGENDplexTM; BioLegend), according to manufacturer’s instruction. Samples were acquired on BD LSRFortessa Cell Analyzer and data were analyzed by LEGENDplex™ Cloud-based Data Analysis Software (BioLegend).
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3

Multiplex Cytokine Profiling of TLR3/MDA5 Activation

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We used a synthetic analog of dsRNA, poly(I:C), as a nonspecific agonist of TLR3 and MDA5/RIG-I. SV40-fibroblast cells were activated in 24-well plates, at a density of 100,000 cells/well, by incubation for 24 h with poly(I:C) at concentrations of 1, 5 and 25 μg/mL. Cells were stimulated with 25 μg/ml poly(I:C) in the presence of Lipofectamine 2000 to activate MDA5/RIG-I signaling. After 24 h, cell supernatants were used for the LEGENDplex multiplex bead assay (BioLegend, #740003 and #740984), then analyzed by flow cytometry on an Attune NxT Flow Cytometer, according to the manufacturer’s instructions. Data were analyzed with LEGENDplex Cloud-based Data Analysis Software (BioLegend), and presented in raw values and heatmaps. The heatmaps are generated using relative values for each sample as normalized to the maximum range of production levels of each cytokine among all samples (X-Min)/(Max-Min). Min: minimum production level; Max: maximum production level; X: the production level of a given cytokine in a given sample (96 ).
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4

Neutrophil Mobilization and Activation

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Cytokine and chemokines involved in neutrophil mobilization and activation were measured using a custom multiplex bead array kit (LEGENDPlex, Biolegend). Twelve cytokines were measured including, CXCL1, CXCL2, G-CSF, IL-1b, IL-6, IL-4, TGFb, TNFa, GM-CSF, INFg, IL-17A, and IL-10. The assay was performed according to manufacturer’s instructions in duplicate, collected on an SH800 (Sony), and analyzed using the LEGENDPlex Cloud-Based Data Analysis Software (Biolegend and Qognit). Neutrophil elastase was measured via ELISA using a pre-validated kit following manufacturer’s instructions (Abcam) and read using a Mini ELISA Plate Reader (Biolegend).
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5

Multiplex Cytokine Profiling in Mice

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Plasma cytokines and chemokines were analyzed using LEGENDplexTM Mouse Anti-Virus Response Panel (13-plex) (BioLegend, San Diego, California, US), according to manufacturer’s instructions. Data were analyzed using LEGENDplex™ Cloud-based Data Analysis Software (BioLegend).
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6

Multiplex Inflammatory Cytokine Profiling

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Plasma- or serum samples were frozen and thawed for the analysis in a Legendplex (13-plex) Human Inflammation Panel 1 (Biolegend). Samples were measured in duplicates and incubated with beads at 4°C overnight and for 1 h at RT on the next day. The further work steps were performed according to the manufacturer instructions. Samples were measured on a FACS Canto II and evaluated with the LEGENDplex™ Cloud-based Data Analysis Software (Biolegend collaboration with Qognit). If the value was underneath the detection limit than the value was set equal to the lowest calculated standard value.
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7

Multiplex Cytokine Profiling of TLR3/MDA5 Activation

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We used a synthetic analog of dsRNA, poly(I:C), as a nonspecific agonist of TLR3 and MDA5/RIG-I. SV40-fibroblast cells were activated in 24-well plates, at a density of 100,000 cells/well, by incubation for 24 h with poly(I:C) at concentrations of 1, 5 and 25 μg/mL. Cells were stimulated with 25 μg/ml poly(I:C) in the presence of Lipofectamine 2000 to activate MDA5/RIG-I signaling. After 24 h, cell supernatants were used for the LEGENDplex multiplex bead assay (BioLegend, #740003 and #740984), then analyzed by flow cytometry on an Attune NxT Flow Cytometer, according to the manufacturer’s instructions. Data were analyzed with LEGENDplex Cloud-based Data Analysis Software (BioLegend), and presented in raw values and heatmaps. The heatmaps are generated using relative values for each sample as normalized to the maximum range of production levels of each cytokine among all samples (X-Min)/(Max-Min). Min: minimum production level; Max: maximum production level; X: the production level of a given cytokine in a given sample (96 ).
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