Biolegend, 423303, Cell Activation Cocktail (with Brefeldin A), 100microl

Cell Activation Cocktail (with Brefeldin A) is a pre-mixed cocktail with optimized concentration of PMA (phorbol 12-myristate-13-acetate), ionomycin, and protein transport inhibitor (Brefeldin A). Activation of cells with PMA and ionomycin leads to cytokine production that is captured in the rough endoplasmic reticulum and Golgi apparatus by the protein transport inhibitor Brefeldin A. Brefeldin A functions to inhibit intracellular protein transport, thus allowing intracellular detection of the secreted cytokine and proteins by immunofluorescent staining.
100microl
Formulation: Cell Activation Cocktail (with Brefeldin A) is composed of PMA, ionomycin, and Brefeldin A in DMSO (500X).
Concentration: Each vial of this cocktail contains phorbol-12-myristate 13-acetate (40.5 µM), ionomycin (669.3 µM), and Brefeldin A (2.5 mg/ml) in DMSO (500X).
Storage & Handling: Store cocktail at -70°C upon receipt. Protect from light. Avoid repeat freeze/thaw cycles.
Application: Activ, FC, ICFC - Quality tested
Recommended Usage: Cat. No. 423303 contains 100 µL of cocktail, formulated at 500X, that can be used for activating 50 mL of cells of various types. Cat. No. 423304 contains 400 µL (4 vials x 100 µL per vial) of cocktail, formulated at 500X, that can be used for activating 200 mL of cells of various types.
Application Notes: Cell Activation Protocol: 1. Resuspend cells of interest in desired cell culture medium. Recommended cell suspension is between 1-2 x 106 cells/mL, although effective activation can be obtained with higher or lower concentration. 2. Completely thaw vials in 37°C water bath. 3. Add 2 µL of the cocktail to each mL of cell suspension. 4. Incubate cells at 37°C in a CO2 incubator for 6 hours or the time period of interest. 5. Harvest activated cells and centrifuge at 350g for 5 minutes. Discard supernatant. 6. Add 2.5 mL of Cell Staining Buffer (Cat. No. 420201) to the cell pellet, mix by vortex or pipetting, then centrifuge at 350g for 5 minutes. Discard supernatant. 7. Repeat step 6. 8. Cells are now ready to be tested for surface markers or proteins of interest. Note: Activation of cells overnight (>12 hours) with Brefeldin A is generally not recommended due to some level of toxicity. Under these conditions, it is recommended to use Cell Activation Cocktail without Brefeldin A (Cat. No. 423301), and then add monensin (Cat. No. 420701) at appropriate concentrations. This product is temperature sensitive; repeated freeze/thaw is not recommended. Intracellular and surface flow staining, as well as ELISA, can be performed following activation of cells with this cocktail.
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Gene ID: NA
Regulatory Status: RUO
Other Names: Cell Stimulation Cocktail, PMA/Ionomycin
Q: The Brefeldin A solution freezes at 4°C . Is the solution still OK?
A: We recommend to thaw in warm water after removing from the fridge.  The Brefeldin A is dissolved in DMSO, which freezes at 18°C, so this is normal.  No one has reported any problems with the freeze/thaw cycles and this is how we recommend it is stored.   If customers are concerned, they can aliquot the Brefeldin A to avoid the freeze thaw.
Q: How do I choose monensin or Brefeldin A solution?
A: Generally, Brefeldin A is more toxic for longer term incubations, so for shorter stimulations (6 hrs or less) use Brefeldin A.  For longer stimulations use monensin.  We recommend optimization for each cell type and protocol.