Z-IETD-FMK (Z-IE(OMe)TD(OMe)-FMK) is a selective and cell permeable caspase-8 inhibitor^[1]. Z-IETD-FMK is also a granzyme B inhibitor^[5].

Z-IETD-FMK causes full inhibition only of the proapoptotic effect of TNFα with an IC₅₀ of 0.46 μM^[1]. Z-IETD-FMK and Z-VAD-FMK at non-toxic doses are found to be immunosuppressive and inhibit human T cell proliferation induced by mitogens and IL-2. They are shown to block NF-κB in activated primary T cells, but have little inhibitory effect on the secretion of IL-2 and IFN-γ during T cell activation^[2]. Z-IETD-FMK inhibits the cleavage of caspase-8 and only partially inhibits the cleavage of caspase-3 and PARP. Z-IETD-FMK can prevent the execution of apoptosis in retinal cells exposed to different apoptotic stimuli^[3].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Pharmacological inhibition of caspase-8 by z-IETD-FMK robustly reduces tumour outgrowth and this is closely associated with a reduction in the release of pro-inflammatory cytokines, IL-6, TNF-α, IL-18, IL-1α, IL-33, but not IL-1β. Furthermore, inhibition of caspase-8 reduces the recruitment of innate suppressive cells, such as myeloid-derived suppressor cells, but not of regulatory T cells to lungs of tumour-bearing mice^[4].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

654.68

C₃₀H₄₃FN₄O₁₁

210344-98-2

Z-Ile-Glu-Thr-Asp-FMK

ZIETDFMK

Room temperature in continental US; may vary elsewhere.

请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液；一旦配成溶液，请分装保存，避免反复冻融造成的产品失效。
储备液的保存方式和期限：-80°C, 6 months; -20°C, 1 month。-80°C 储存时，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。

• [1]. Cowburn AS, et al. z-VAD-fmk augmentation of TNF alpha-stimulated neutrophil apoptosis is compound specific and does not involve the generation of reactive oxygen species.

  [2]. Lawrence CP, et al. Suppression of human T cell proliferation by the caspase inhibitors, z-VAD-FMK and z-IETD-FMK is independent of their caspase inhibition properties. Toxicol Appl Pharmacol. 2012 Nov 15;265(1):103-12.

  [3]. Tezel G, et al. Inhibition of caspase activity in retinal cell apoptosis induced by various stimuli in vitro. Invest Ophthalmol Vis Sci. 1999 Oct;40(11):2660-7.

  [4]. Terlizzi M, et al. Pharmacological inhibition of caspase-8 limits lung tumour outgrowth. Br J Pharmacol. 2015 Aug;172(15):3917-28.

  [5]. Yang J, et al. Granzyme B Is an Essential Mediator in CD8+ T Cell Killing of Theileria parva-Infected Cells.Infect Immun. 2018 Dec 19;87(1). pii: e00386-18.