Rebastinib (DCC-2036) is an orally active, non-ATP-competitive Bcr-Abl inhibitor for Abl1^WT and Abl1^T315I with IC₅₀s of 0.8 nM and 4 nM, respectively. Rebastinib also inhibits SRC, KDR, FLT3, and Tie-2, and has low activity to seen towards c-Kit.

IC50: 0.75±0.11 nM (ABL1^WT), 2±0.3 nM (FLT3), 4±0.3 nM (KDR), 6±0.3 nM (TIE2), 34±6 nM (SRC)^[1]

Rebastinib potently (IC₅₀ 0.82 nM) inhibits u-ABL1^native, which is thought to exist predominantly in the inactive type II conformation. In addition, Rebastinib also strongly inhibits p-ABL1^native (IC₅₀ 2 nM), which more readily adopts an active, Type I conformation^[1].
Rebastinib potently inhibits both u-ABL1^T315I (IC₅₀ 5 nM) and p-ABL1^T315I (IC₅₀ 4 nM), both of which exist predominately in the Type I conformation due to stabilization of an activating hydrophobic spine by the T315I mutation^[1].
In addition to ABL1, Rebastinib also inhibits the SRC family kinases LYN, SRC, FGR, and HCK, and PDGFRα, and PDGFRβ with IC₅₀ of 29±1, 34±6, 38±1, 40±1, 70±10 and 113±10 nM, respectively. Notably, Rebastinib spared c-KIT (IC₅₀ 481 nM)^[1].
Rebastinib effectively inhibits the proliferation of Ba/F3 cells expressing native BCR-ABL1^native (IC₅₀ 5.4 nM). Rebastinib also inhibits proliferation of the Ph⁺ cell line K562 (IC₅₀ 5.5 nM)^[1].
Rebastinib also inhibits proliferation of several common TKI-resistant mutants of BCR-ABL1, including G250E, Q252H, Y235F, E255K, V299L, F317L, and M351T, at IC₅₀s ranging from 6-150 nM. Rebastinib effectively inhibits autophosphorylation of BCR-ABL1^native (IC₅₀ 29 nM) and BCR-ABL1^T315I (IC₅₀ 18 nM), as well as the phosphorylation of STAT5 in both cell lines (IC₅₀ 28 nM and 13 nM, respectively)^[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.

A single dose of Rebastinib (DCC-2036; oral; 100 mg/kg) affords circulating plasma levels that exceeds 12 μM for up to 24 hours, and effectively inhibits BCR-ABL1 signaling for up to 8 hours in Ba/F3-BCR-ABL1^T315I leukemia cells isolated from BM and spleen of tumor-bearing mice^[1].
Treatment of mice bearing Ba/F3-BCR-ABL1^T315I leukemia cells with Rebastinib at 100 mg/kg once daily by oral gavage significantly prolonged their survival, while STI571 at 100 mg/kg twice daily is ineffective^[1].
In this aggressive allograft model, Rebastinib is as effective for treatment of BCR-ABL^T315I leukemia as STI571 at 100 mg/kg twice daily in BCR-ABL1^native leukemia, and reduces the leukemia cell burden in the spleens of treated mice^[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.

553.59

C₃₀H₂₈FN₇O₃

1020172-07-9

Room temperature in continental US; may vary elsewhere.

DMSO : 50 mg/mL (90.32 mM; ultrasonic and warming and heat to 80°C)

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: ≥ 2.08 mg/mL (3.76 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (3.76 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 20.8 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% (20% SBE-β-CD in saline)

  Solubility: ≥ 2.08 mg/mL (3.76 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (3.76 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 20.8 mg/mL 的澄清 DMSO 储备液加到 900 μL 20% 的 SBE-β-CD 生理盐水水溶液中，混合均匀。

  将 2 g 磺丁基醚 β-环糊精加入 5 mL 生理盐水中，再用生理盐水定容至 10 mL，完全溶解，澄清透明

• [1]. Chan WW, et al. Conformational control inhibition of the BCR-ABL1 tyrosine kinase, including the gatekeeper T315I mutant, by the switch-control inhibitor DCC-2036. Cancer Cell. 2011, 19(4), 556-568.

Ba/F3 cells (3×10³ cells/well) or primary Ph+ leukemia cells (5×10⁴ cells/well) are plated in triplicate in 96-well plates containing test compounds (e.g., Rebastinib (DCC-2036)). After 72h, viable cells are quantified by resazurin or MTT assay. Results represent an average of at least three independent experiments^[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.

Mice^[1]
Ba/F3 cells (1×10⁶) transformed to interleukin-3 independence by transduction with either BCR-ABL1^native or BCR-ABL1^T315I retrovirus are injected intravenously into syngeneic Balb/c recipients. Beginning day 3 post-injection, mice are treated with STI571 (100 mg/kg in water twice daily via oral gavage) or with Rebastinib (DCC-2036) (100 mg/kg in 0.5% CMC/1% Tween-80, once daily via oral gavage) or with vehicle (0.5% CMC/1% Tween-80) alone. For induction of CML-like leukemia, bone marrow (BM) from male Balb/c donor mice is harvested 4d after intravenous administration of 150 mg/kg 5-FU, transduced with BCR-ABL1^T315I retrovirus, and 5×10⁵ cells injected intravenously into sublethally irradiated (400 cGy) Balb/c recipients. Beginning at d5 post-transplant, cohorts are treated once daily by oral gavage with vehicle alone, or Rebastinib (DCC-2036) at 100 mg/kg. For induction of B-cell acute lymphoblastic leukemia, BM from donors not pretreated with 5-FU is transduced once with BCR-ABL1^T315I retrovirus and 1×10⁶ cells injected into sublethally irradiated Balb/c recipients. Beginning at d8 post-transplant, cohorts are treated twice daily by oral gavage with vehicle alone, with Rebastinib (DCC-2036) at 60 mg/kg, with STI571 at 100 mg/kg (in water), or with BMS-354825 at 10 mg/kg (in 80 mM citric acid pH 3.1).

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.

• [1]. Chan WW, et al. Conformational control inhibition of the BCR-ABL1 tyrosine kinase, including the gatekeeper T315I mutant, by the switch-control inhibitor DCC-2036. Cancer Cell. 2011, 19(4), 556-568.