Detect caspase-8 activity with the FLICA Caspase-8 Assay Kit. This in vitro assay employs the fluorescent inhibitor probe FAM-LETD-FMK to label active caspase-8 enzyme in living cells. Analyze samples using fluorescence microscopy, a fluorescence plate reader, or flow cytometry.

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FAM-FLICA® Caspase-8 Assay Kit
SKU: 99

Size: 25 Tests
Sale price$209.00

Bulk Order FAM-FLICA® Caspase-8 Assay Kit

Caspases play important roles in apoptosis and inflammation. ICT’s FLICA assay kits are used by researchers seeking to quantitate apoptosis via caspase activity in cultured cells and tissues. The FAM FLICA Caspase-8 assay probe allows researchers to assess caspase-8 activation. The FLICA reagent FAM-LETD-FMK enters each cell and irreversibly binds to activated caspase-8. Because the FAM-LETD-FMK FLICA reagent becomes covalently coupled to the active enzyme, it is retained within the cell, while any unbound FAM-LETD-FMK FLICA reagent diffuses out of the cell and is washed away. The remaining green fluorescent signal is a direct measure of the active caspase-8 enzyme activity present in the cell at the time the reagent was added. Cells that contain the bound FLICA can be analyzed by a fluorescence plate reader, fluorescence microscopy, or flow cytometry. Cells labeled with the FLICA reagent may be read immediately or preserved for 16 hours using the fixative included in the kit. Unfixed samples may also be analyzed with Propidium Iodide or Hoechst 33342 to detect necrosis or changes in nuclear morphology, respectively.
488 nm / 530 nm
Flow Cytometer, Fluorescence Microscope, Fluorescence Plate Reader
Cell culture
Domestic: Overnight Delivery; International: Priority Shipping
United States
  1. Prepare samples and controls
  2. Dilute 10X Apoptosis Wash Buffer 1:10 with diH20.
  3. Reconstitute FLICA with 50 μL DMSO.
  4. Dilute FLICA 1:5 by adding 200 μL PBS.
  5. Add diluted FLICA to each sample at 1:30 (e.g., add 10 μL to 290 μL of cultured cells).
  6. Incubate approximately 1 hour.
  7. Remove media and wash cells 3 times: add 1X Apoptosis Wash Buffer and spin cells.
  8. If desired, label with additional stains, such as Hoechst, Propidium Iodide, 7-AAD, or an antibody.
  9. If desired, fix cells.
  10. Analyze with a fluorescence microscope, fluorescence plate reader, or flow cytometer. FAM-FLICA excites at 492 nm and emits at 520 nm.

If working with adherent cells, please see the manual for additional protocols.

Kit 99: 25 Tests
  • FLICA Caspase-8 Reagent (FAM-LETD-FMK), 1 vial, #656
  • 10X Apoptosis Wash Buffer, 15 mL, #635
  • Fixative, 6 mL, #636
  • Propidium Iodide, 1 mL, #638
  • Hoechst 33342, 1 mL, #639
  • Kit Manual
  • Kit 910: 100 Tests
  • FLICA Caspase-8 Reagent (FAM-LETD-FMK), 4 vials, #656
  • 10X Apoptosis Wash Buffer, 60 mL, #634
  • Fixative, 6 mL, #636
  • Propidium Iodide, 1 mL, #638
  • Hoechst 33342, 1 mL, #639
  • Kit Manual
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    Peng, Z;Gillissen, B;Richter, A;Sinnberg, T;Schlaak, MS;Eberle, J. Enhanced Apoptosis and Loss of Cell Viability in Melanoma Cells by Combined Inhibition of ERK and Mcl-1 Is Related to Loss of Mitochondrial Membrane Potential, Caspase Activation and Upregulation of Proapoptotic Bcl-2 Proteins. International journal of molecular sciences. 2023 March

    Ivasechko, I;Lozynskyi, A;Senkiv, J;Roszczenko, P;Kozak, Y;Finiuk, N;Klyuchivska, O;Kashchak, N;Manko, N;Maslyak, Z;Lesyk, D;Karkhut, A;Polovkovych, S;Czarnomysy, R;Szewczyk, O;Kozytskiy, A;Karpenko, O;Khyluk, D;Gzella, A;Bielawski, K;Bielawska, A;Dzubak, P;Gurska, S;Hajduch, M;Stoika, R;Lesyk, R. Molecular design, synthesis and anticancer activity of new thiopyrano[2,3-d]thiazoles based on 5-hydroxy-1,4-naphthoquinone (juglone). European journal of medicinal chemistry. 2023 March

    Rok, J;Rzepka, Z;Banach, K;Kowalska, J;Wrześniok, D. The Assessment of the Phototoxic Action of Chlortetracycline and Doxycycline as a Potential Treatment of Melanotic Melanoma—Biochemical and Molecular Studies on COLO 829 and G-361 Cell Lines. International Journal of Molecular Sciences. 2023 January; doi: 10.3390/ijms24032353. Article

    Chao, YY;Puhach, A;Frieser, D;Arunkumar, M;Lehner, L;Seeholzer, T;Garcia-Lopez, A;van der Wal, M;Fibi-Smetana, S;Dietschmann, A;Sommermann, T;Ćiković, T;Taher, L;Gresnigt, MS;Vastert, SJ;van Wijk, F;Panagiotou, G;Krappmann, D;Groß, O;Zielinski, CE. Human TH17 cells engage gasdermin E pores to release IL-1α on NLRP3 inflammasome activation. Nature immunology. 2023 February; doi: 10.1038/s41590-022-01386-w. Article

    Janowska, S;Khylyuk, D;Gornowicz, A;Bielawska, A;Janowski, M;Czarnomysy, R;Bielawski, K;Wujec, M. Synthesis and Anticancer Activity of 1,3,4-Thiadiazoles with 3-Methoxyphenyl Substituent. Molecules (Basel, Switzerland). 2022 October 17; doi: 10.3390/molecules27206977. Text

    He, L;Wei, T;Huang, Y;Zhang, X;Zhu, D;Liu, H;Wang, Z. miR-214-3p Deficiency Enhances Caspase-1-Dependent Pyroptosis of Microglia in White Matter Injury. Journal of Immunology Research. 2022 August 22; doi: 10.1155/2022/1642896. Full Article

    Kubiak, AB;Ziółkowska, EI;Korycka-Wołowiec, AB;Robak, T;Wołowiec, D. The influence of venetoclax, used alone or in combination with cladribine (2-CdA), on CLL cells apoptosis in vitro: Preliminary results. Advances in Clinical and Experimental Medicine : Official Organ Wroclaw Medical University. 2022 April 25; doi: 10.17219/acem/148142. Abstract

    Lima, TS;Mallya, S;Jankeel, A;Messaoudi, I;Lodoen, MB. Toxoplasma gondii Extends the Life Span of Infected Human Neutrophils by Inducing Cytosolic PCNA and Blocking Activation of Apoptotic Caspases. mBio. 2021 Jan 26; 12(1). doi: 10.1128/mBio.02031-20. Full Article

    Suzuki T, Kohyama K, Moriyama K, Ozaki M, Hasegawa S, Ueno T, Saitoe M, Morio T, Hayashi M, Sakuma H. Extracellular ADP augments microglial inflammasome and NF-κB activation via the P2Y12 receptor. Eur J Immunol. 2019 Sep 24. doi: 10.1002/eji.201848013. [Epub ahead of print]. Abstract

    Gornowicz A, Pawłowska N, Czajkowska A, Czarnomysy R, Bielawska A, Bielawski K, Michalak O, Staszewska-Krajewska O, and Kałuża Z. Biological evaluation of octahydropyrazin[2,1-a:5,4-a’]diisoquinoline derivatives as potent anticancer agents. Tumour Biol. 2017. Jun;39(6):1010428317701641. doi: 10.1177/1010428317701641. Full Text.

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