Z-IETD-FMK

Catalog No.S7314 Batch:S731401

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Technical Data

Formula

C30H43FN4O11
Molecular Weight 654.68 CAS No. 210344-98-2
Solubility (25°C)* In vitro DMSO 91 mg/mL (138.99 mM)
Water Insoluble
Ethanol Insoluble
In vivo (Add solvents to the product individually and in order)
Homogeneous suspension
CMC-NA
≥5mg/ml Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description Z-IETD-FMK (Caspase-8 Inhibitor, Z-IE(OMe)TD(OMe)-FMK) is a specific Caspase-8 inhibitor. Z-IETD-FMK is also an inhibitor of granzyme B.
Targets
Caspase-8 [1]
In vitro

Z-IETD-FMK, which inhibits the cleavage of caspase-8 and partially inhibits the cleavage of caspase-3 and PARP, prevents the execution of apoptosis in retinal cells exposed to different apoptotic stimuli. [1]

Z-IETD-FMK (50 μM) reduces ceramide-induced cardiomyocyte death and significantly inhibits the activation of caspase 3. [2]

Inhibition of caspase-8 by Z-IETD-FMK affects the generation of activated/memory T cells and T cell cytokine production, and decreases NF-kappaB responses to TCR:CD3 engagement in T cell cultures. [3]
In vivo

In vivo, inhibition of caspase-8 by Z-IETD-FMK reduces memory/activated CD4 and CD8 T cells, and increases susceptibility to T. cruzi infection. [3]

Z-IETD-FMK promotes neuronal survival and regeneration of injured retinal ganglion cells after CNS injuries. [4]

Protocol (from reference)

Cell Assay:

[2]
  • Cell lines

    Rat neonatal cardiomyocytes

  • Concentrations

    50 µM

  • Incubation Time

    24 h

  • Method

    Drugs were added to the cell culture medium simultaneously with ceramide, and surviving cells were counted 24 hours later.
Animal Study:

[3]
  • Animal Models

    T. cruzi-infected mice

  • Dosages

    0.4 mg/3 days

  • Administration

    --

References

  • https://pubmed.ncbi.nlm.nih.gov/10509663/
  • https://pubmed.ncbi.nlm.nih.gov/10997751/
  • https://pubmed.ncbi.nlm.nih.gov/15879131/
  • https://pubmed.ncbi.nlm.nih.gov/21775595/

Customer Product Validation

The caspase-8 inhibitors do not rescue NB4 cells from TPEN-triggered apoptosis. NB4 cells were pre-treated with 50 μM Z-ITED-FMK or 100 μM Ac-IETD-CHO for 1 h, and then treated with 5 μM TPEN for 24 h. (A) Cell morphology was observed and recorded using an optical microscope. The scale bar represents 20 μm. A partiallty enlarged view was shown in the lower left corner of every picture. (B) Apoptosis rate was measured with Annexin V/PI dual staining by flow cytometry.

Data from [ , , Cell Physiol Biochem, 2017, 42(5):1822-1836 ]

The inhibition of caspase‑8 had no effect on the cell detachment and cell death induced by reduced-gliotoxin. The cells were treated with 5 μM reduced-gliotoxin for 24 h, in the absence and presence of the caspase‑8 inhibitor, Z-IETD-FMK, at various concentrations. Western blot analyses were performed for the indicated protein. GAPDH was used as a loading control. re-G, reduced-gliotoxin; CTNNB, β-catenin

Data from [ , , Int J Oncol, 2018, 52(3):1023-1032 ]

sh-A20 cells were incubated with 100 ng/mL of IFN-γ for 24 h after 1 h pretreatment with z-DEVD-fmk, z-LEHD-fmk and z-IETD-fmk, respectively. Cell viability (left) was determined by MTT assay and apoptosis (right) was determined by flow cytometry. The data are represented as the mean ± SD of three independent experiments. The significance was determined by the Student’s t-test (**P<0.01).

Data from [ , , Drug Des Devel Ther, 2017, 11:2841-2850 ]

Cells were pretreated with Z-ITED-FMK (caspase-8 inhibitor, 20 μM) for 30 min before FTS(farnesylthiosalicylic acid)/DHA(Dihydroartemisinin)/ARS(artesunate) treatment or the combination treatment of DHA/ARS and FTS for 48 h and then analyzed by CCK-8 assay. *P < 0.05, **P < 0.01, and ***P < 0.001.

Data from [ , , PLoS One, 2017, 12(2):e0171840 ]

Selleck's Z-IETD-FMK has been cited by 82 publications

GZMK-expressing CD8+ T cells promote recurrent airway inflammatory diseases [ Nature, 2025, 10.1038/s41586-024-08395-9] PubMed: 39814882
The intrinsic expression of NLRP3 in Th17 cells promotes their protumor activity and conversion into Tregs [ Cell Mol Immunol, 2025, 22(5):541-556] PubMed: 40195474
Homologous recombination promotes non-immunogenic mitotic cell death upon DNA damage [ Nat Cell Biol, 2025, 27(1):59-72] PubMed: 39805921
PI3K/AKT signaling mediates stress-inducible amyloid formation through c-Myc [ Cell Rep, 2025, 44(5):115617] PubMed: 40272983
Eimeria tenella AMA1 regulates host cell apoptosis through the mitochondrial pathway and the death receptor pathway [ Microbiol Spectr, 2025, e0041625.] PubMed: 40853121
DBeQ derivative targets vacuolar protein sorting 4 functions in cancer cells and suppresses tumor growth in mice [ J Pharmacol Exp Ther, 2025, 392(4):103524] PubMed: 40147096
Sodium silicate complex reduces subdermal hemorrhage and prolongs survival after envenomation by Trimeresurus stejnegeri stejnegeri [ Toxicon, 2025, 265:108495] PubMed: 40669755
EFHD2 suppresses intestinal inflammation by blocking intestinal epithelial cell TNFR1 internalization and cell death [ Nat Commun, 2024, 15(1):1282] PubMed: 38346956
PARP inhibitors enhance antitumor immune responses by triggering pyroptosis via TNF-caspase 8-GSDMD/E axis in ovarian cancer [ J Immunother Cancer, 2024, 12(10)e009032] PubMed: 39366751
RIPK1 is dispensable for cell death regulation in β-cells during hyperglycemia [ Mol Metab, 2024, 87:101988] PubMed: 39004142

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SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

NOT FOR HUMAN, VETERINARY DIAGNOSTIC OR THERAPEUTIC USE.