Zotatifin (eFT226) is a potent, selective, and well-tolerated eIF4A inhibitor. Zotatifin promotes eIF4A binding to specific mRNA sequences with recognition motifs in the 5’-UTRs (IC₅₀=2 nM) and interferes with the assembly of the eIF4F initiation complex^[1]. Zotatifin shows robust antiviral effects, it effectively reduces viral infectivity by inhibiting SARS-CoV-2 NP protein biogenesis (IC₉₀=37 nM)^[2]. Zotatifin induces cell apoptosis^[1].

IC50: 2 nM (eIF4A)^[1]
IC90: 37 nM (NP-staining assay)^[2]

Zotatifin induces the formation of a stable ternary complex [eIF4A-RNA-eFT226]. Zotatifin increases the residence time for eIF4A1 binds to an AGAGAG RNA surface, the K_d values are 0.021 μM and 8.0 μM, respectively for eFT226 presence or absence^[1].
Zotatifin inhibits in vitro translation as a sequence-dependent manner, the IC₅₀ values are 1.5 nM, 13.8 nM, 92.5 nM, and 217.5 nM, respectively in an MDA-MB-231 cell line with transiently transfected AGAGAG, GGCGGC, CCGCCG and CAACAA 5’-UTRs-containing sequences^[1].
Zotatifin (0.0001 μM-1 μM; 72 hours) inhibits tumor cells growth as a dose-dependent manner. It shows a potent anti-proliferative activity (GI₅₀<15 nm) in mda-mb-231 tumor cells, but eif4a1 f163l mutation rescues eft226 anti-proliferative activity^[1].
Zotatifin (0.0001 μM-1 μM; 72 hours) inhibits tumor cell growth, exhibits GI₅₀ values for TMD8, SU-DHL-2, HBL1, Pfeiffer, SU-DHL-6, SU-DHL-10, VAL, Carnaval, U2973, Ramos, Jeko1, Mino, and Rec-1 cells are 4.1 nM, 3 nM, 5.6 nM, 3.7 nM, 5.3 nM, 7.3 nM, 6.6 nM, 4.4 nM, 4.2 nM, 4.6 nM, 7.9 nM, 11.2 nM and 11.8 nM, respectively^[1].
Zotatifin (30 μM-100 μM; 3 or 24 hours) results in translational regulation of oncogenic protein, decreases MYC,CCND3,BCL2 and MCL1 protein expression as a time- and dose-dependent manner^[1].
The anti-viral activity of Zotatifin is demonstrated by various assays: such as TCID50 assay, Plaque assay, NP-staining assay, et al^[2].
Zotatifin (10 nM, 100 nM, 200 nM, 500 nM, 2 μM, 10 μM; 1 or 2 hours pre-treatment before virus isolates) decreases the detection of the viral NP protein and reduces viral infectivity in a concentration-dependent matter in Vero E6 cells cells infected with SARS-CoV-2 isolates^[2].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

Zotatifin (intravenous injection; 1 mg/kg; 14-22 days) decreases tumor volume, inhibits the TMD8 xenograft-bearing, HBL1 xenograft-bearing, Pfeiffer xenograft-bearing, SU-DHL-6 xenograft-bearing, SU-DHL-10 xenograft-bearing and Ramos-bearing animals’tumor growth as percentage of 97%, 87%, 70%, 83%, 37% and 75%, respectively^[1].
Zotatifin (intravenous injection; 0.001 mg/kg-1 mg/kg; 15 days) inhibits the growth of B-cell lymphoma xenografts and is well-tolerated against B-cell lymphoma xenograft models in vivo^[1].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

487.55

C₂₈H₂₉N₃O₅

2098191-53-6

Room temperature in continental US; may vary elsewhere.

DMSO : 200 mg/mL (410.21 mM; Need ultrasonic)

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。

请根据您的实验动物和给药方式选择适当的溶解方案。以下溶解方案都请先按照 In Vitro 方式配制澄清的储备液，再依次添加助溶剂：

——为保证实验结果的可靠性，澄清的储备液可以根据储存条件，适当保存；体内实验的工作液，建议您现用现配，当天使用； 以下溶剂前显示的百
分比是指该溶剂在您配制终溶液中的体积占比；如在配制过程中出现沉淀、析出现象，可以通过加热和/或超声的方式助溶

• 1.

  请依序添加每种溶剂： 10% DMSO    40% PEG300    5% Tween-80    45% saline

  Solubility: ≥ 5 mg/mL (10.26 mM); Clear solution

  此方案可获得 ≥ 5 mg/mL (10.26 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 50.0 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中，混合均匀；向上述体系中加入50 μL Tween-80，混合均匀；然后继续加入 450 μL生理盐水定容至 1 mL。

  将 0.9 g 氯化钠，完全溶解于 100 mL ddH₂O 中，得到澄清透明的生理盐水溶液

• 2.

  请依序添加每种溶剂： 10% DMSO    90% corn oil

  Solubility: ≥ 5 mg/mL (10.26 mM); Clear solution

  此方案可获得 ≥ 5 mg/mL (10.26 mM，饱和度未知) 的澄清溶液，此方案不适用于实验周期在半个月以上的实验。

  以 1 mL 工作液为例，取 100 μL 50.0 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中，混合均匀。

• [1]. Peggy A. Thompson, et al. Preclinical Evaluation of eFT226, a Novel, Potent and Selective eIF4A Inhibitor with Anti-tumor Activity in B-cell Malignancies.

  [2]. Gordon DE, et al. A SARS-CoV-2 protein interaction map reveals targets for drug repurposing.Nature. 2020 Apr 30.