• Product nameCaspase 8 (active) FITC Staining Kit
    See all Caspase 8 kits
  • Sample type
    Adherent cells, Suspension cells
  • Assay typeEnzyme activity
  • Assay time
    2h 00m
  • Product overview

    Caspase 8 (active) FITC Staining Kit (ab65614) provides a convenient means for sensitive detection of activated caspase 8 in living cells. The assay utilizes the caspase 8 inhibitor, IETD-FMK, conjugated to FITC (FITC-IETD-FMK) as a marker. FITC-IETD-FMK is cell permeable, non-toxic, and irreversibly binds to activated caspase 8 in apoptotic cells. The FITC label allows detection of activated caspase-8 in apoptotic cells directly by fluorescence microscopy, flow cytometry, or fluorescence plate reader.
    Visit our FAQs page for tips and troubleshooting.

  • Notes

    Activation of caspases plays a central role in apoptosis.

  • Tested applicationsSuitable for: FM, Functional Studies, Flow Cytmore details


  • RelevanceCaspases are cysteine proteases, expressed as inactive precursors, that mediate apoptosis by proteolysis of specific substrates. Caspases have the ability to cleave after aspartic acid residues. There are two classes of caspases involved in apoptosis; initiators (activation by receptor cluster) and effectors (activation by mitochondrial permeability transition). Proapoptotic signals autocatalytically activate initiator caspases, such as Caspase 8 and Caspase 9. Activated initiator caspases then process effector caspases, such as Caspase 3 and Caspase 7, which in turn cause cell collapse.
  • Cellular localizationCytoplasmic
  • Alternative names
    • Apoptotic cysteine protease
    • CAP4
    • CASP8
    • Caspase 8
    • CED 3
    • FLICE
    • MACH
    • MACH5
    see all


Our Abpromise guarantee covers the use of ab65614 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
FM Use at an assay dependent concentration.
Functional Studies Use at an assay dependent dilution.
Flow Cyt Use at an assay dependent dilution.

Caspase 8 (active) FITC Staining Kit images

  • Active caspase 8 in control Jurkat cells (10e6/mL) or cells treated for five hours with 10 ug/mL Cyclohexamide (CHX) (ab120093) or four hours with 25 ug/mL Mitomycin C (MitoC) (ab120797). Background signal subtracted, duplicates; +/- SD.

  • Active caspase 8 in Jurkat cells following four hours exposure to 50 ng/mL anti-Fas Ab (αFas) (MBL), five hours with 10 μg/mL cyclohexamide (CHX) (ab120093), or one hour pretreatment with CHX followed by four hours with αFas. Background signal subtracted, duplicates; +/- SD.

  • Caspase 8 activation of Hela (left) and SiHa (right) cells after in vitro treatment with pentoxylline (PTX) or cisplatin (CIS) either alone or in combination. Results represent the mean ± SD of three independent experiments carried out in triplicate. (*) p<0.001 vs CTL.

    Image obtained from Hernandez-Flores G et al; BMC Cancer, 2011 Nov 11; 11:483


References for Caspase 8 (active) FITC Staining Kit (ab65614)

This product has been referenced in:
  • Hernandez-Flores G  et al. Pentoxifylline sensitizes human cervical tumor cells to cisplatin-induced apoptosis by suppressing NF-kappa B and decreased cell senescence. BMC Cancer 11:483 (2011). Read more (PubMed: 22074157) »

See 1 Publication for this product

Product Wall

Thank you for contacting us. 1.) You may use Caspase-8 negative cells (cells that were not stimulated to induce Caspase-8) for your negative control in Flow Cytometry. 2.) For a viability dye, you may try using PI but this will need to be optimi...

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