A Multiplex Bead-Based Immunoassay to Quantify Multiple Cytokine Targets
Abstract
Source: Lehmann, J. S., et al. Multiplex Cytokine Profiling of Stimulated Mouse Splenocytes Using a Cytometric Bead-based Immunoassay Platform. J. Vis. Exp. (2017).
This video demonstrates a multiplex bead-based immunoassay for quantifying multiple cytokine targets in a sample. A mixture of distinct microspheres conjugated to cytokine-specific antibodies is used to bind the cytokines present in the sample. Streptavidin-tagged reporters are immobilized on the bound-cytokines using biotinylated detection antibodies. Flow cytometry identifies the bound cytokines based on the unique sizes and internal fluorescence intensities of the microspheres, while the fluorescence intensity of the reporters indicates the number of cytokines.
Protocol
Disclosures
The authors have nothing to disclose.
Materials
| Allegra 6R Centrifuge with MICROPLUS Carrier Adaptor | Beckman Coulter | 366816 | For LEGENDplex assays is run in microtubes, V-or U-bottom 96-well plate (optional) |
| LEGENDplex Mouse T helper Cytokine Panel | BioLegend | 740005 | Multiplex Immunoassay (13-plex) |
| Anti-mouse CD3ε antibody | BioLegend | 100314 | Clone 145-2C11, low endotoxin, azide free format |
| Anti-mouse CD28 antibody | BioLegend | 102112 | Clone 37.51, low endotoxin, azide free format |
| Vacuum Pump | EMD Millipore | WP6111560 | For LEGENDplex assays using filter plates (recommended) |
| Vacuum Manifold | EMD Millipore | MSVMHTS00 | For LEGENDplex assays using filter plates (recommended) |
| Sterile Disposable Reagent Reservoirs | Fisher Scientific | 07-200-130 | Or equivalent |
| Polypropylene MicroFACS Tubes | Fisher Scientific | 11-842-90 | For LEGENDplex assays is run in microtubes, V-or U-bottom 96-well plate (optional) |
| Pipette Kit | Fisher Scientific | 14-388-100 | Four pipette sizes (0.2-2µL, 2-20µL, 20-200µL, 100-1000µL) |
| Multi-Channel Pipette | Fisher Scientific | FA10011G | capable of dispensing 5 μL to 200 μL |
| Microplate Shaker | Fisher Scientific | 88880023 | Or equivalent |
| Microcentrifuge | Fisher Scientific | 75002410 | Or equivalent |
| FACS tubes | Fisher Scientific | NC9885747 | 12 x 75 mm round bottom |
| PMA (Phorbol 12-myristate 13-acetate) | Sigma-Aldrich | P8139 | |
| Lipopolysaccharide (LPS) | Sigma-Aldrich | L-8274 | Escherichia coli O26:B6 |
| Ionomycin | Sigma-Aldrich | I0634 | |
| Branson B200 Ultrasonic Cleaner | Sigma-Aldrich | Z305359 | Or equivalent |
| Microcentrifuge tubes | Sigma-Aldrich | Z666505 | 1.5 mL polypropylene tubes |
| Flow Cytometer | Various | Various | Cytometer equipped with single laser (488nm blue) or two lasers (488nm blue or 532nm green + 633nm Red) capable of reading emission wavelengths at 575nm and 660nm |
| 96-Well Polypropylene Plate | VWR | 82050-662 | For LEGENDplex assays is run in microtubes, V-or U-bottom 96-well plate (optional) |
