I want to study apoptosis using an Annexin V conjugate, but with adherent cells via microscopy instead of flow cytometry. Can this be done?
It has been done, but we dont recommend it. Both healthy cells and apoptotic cells possess phosphatidylserine on the cell surface, which can be detected with Annexin V, but apoptotic cells have significantly more of it. You can easily tell the difference between these two populations with flow cytometry, because flow cytometers are more sensitive and have a higher throughput. But with a microscope, you cannot always tell the difference, especially for adherent cells. Instead, for microscopy, we recommend a different technique, such as detecting caspases with CellEvent Caspase Detection Reagents.
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Can I use CellEvent Caspase-3/7 Green Detection Reagent with fixed samples?
No, it must be applied to live cell populations.
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With the CellEvent Caspase-3/7 Green Detection Reagent, may I stain cells with nucleic acid stains?
Yes, you may use SYTOX AADvanced Dead Cell Stain that is included in the CellEvent Caspase-3/7 Green Ready Flow Reagent (Cat. No. R37167) and in the CellEvent Caspase-3/7 Green Flow Cytometry Assay Kit (Cat. No. C10427, C10740). You may also try using other nucleic acid stains in the red or far red channels for staining cells.
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With the CellEvent Caspase-3/7 Green Detection Reagent, may I multiplex with fluorescent immunolabeling?
Yes. You can apply surface labels or other reagents. We recommend applying the surface labels or other reagents first.
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Is the CellEvent Caspase-3/7 Green Detection Reagent fixable?
The CellEvent Caspase-3/7 Green Detection Reagent is not covalently attached to any cellular component and may be lost upon fixation. For flow cytometry applications, after applying the reagent, you should examine without washing or fixation. For imaging applications, the CellEvent product signal may be retained after fixation in 3.7% formaldehdye for 15 min.
Find additional tips, troubleshooting help, and resources within our Cell Analysis Support Center.