Asciminib (ABL001)
(Synonyms: ABL001) 目录号 : GC32703
An allosteric inhibitor of Abl1
Cas No.:1492952-76-7
Sample solution is provided at 25 µL, 10mM.
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Quality Control & SDS
- View current batch:
- Purity: >99.50%
- COA (Certificate Of Analysis)
- SDS (Safety Data Sheet)
- Datasheet
Cell experiment: | Ba/F3 cells are treated with a range concentration of asciminib (0-10000 nM) for 48 h. Cell proliferation is measured using the Britelite luciferase detection assay[1]. |
Animal experiment: | Mice: Asciminib efficacy in three patient-derived ALL systemic xenograft models (ALL-7015, AL-7119 and AL-7155) is assessed by FACS monitoring of the percentage of CD45+ cells per live cell in blood samples taken at varying time points after dosing with either 7.5 mg/kg BID (group 2) or 30 mg/kg BID (group 3) asciminib for 3 weeks[1]. |
References: [1]. Wylie AA, et al. The allosteric inhibitor ABL001 enables dual targeting of BCR-ABL1. Nature. 2017 Mar 30;543(7647):733-737. | |
Asciminib is an allosteric inhibitor of Abl1 (IC50 = 0.45 nM).1 It is selective for Abl1 over a panel of more than 60 additional kinases (IC50s = >10 μM), as well as ion channels, nuclear receptors, G protein-coupled receptors (GPCRs), and transporters. Asciminib inhibits the proliferation of Luc-Ba/F3 cells transformed with wild-type Bcr-Abl1 or the drug-resistant mutant Bcr-Abl1T315I (GI50s = 1 and 25 nM, respectively), as well as other drug-resistant mutants.2 It reduces tumor growth in a KCL-22 chronic myelogenous leukemia (CML) mouse xenograft model when administered at a dose of 3 mg/kg twice per day and induces tumor regression at doses of greater than or equal to 7.5 mg/kg twice per day.
1.Wylie, A.A., Schoepfer, J., Jahnke, W., et al.The allosteric inhibitor ABL001 enables dual targeting of BCR-ABL1Nature543(7647)733-737(2017) 2.Schoepfer, J., Jahnke, W., Berellini, G., et al.Discovery of asciminib (ABL001), an allosteric inhibitor of the tyrosine kinase activity of BCR-ABL1J. Med. Chem.61(18)8120-8135(2018)
| Cas No. | 1492952-76-7 | SDF | |
| 别名 | ABL001 | ||
| Canonical SMILES | O=C(C1=CC(C2=NNC=C2)=C(N3C[C@H](O)CC3)N=C1)NC4=CC=C(OC(F)(Cl)F)C=C4 | ||
| 分子式 | C20H18ClF2N5O3 | 分子量 | 449.84 |
| 溶解度 | DMSO : ≥ 100 mg/mL (222.30 mM) | 储存条件 | Store at -20°C |
| General tips | 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 储存时，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。 为了提高溶解度，请将管子加热至37℃，然后在超声波浴中震荡一段时间。 |
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| Shipping Condition | 评估样品解决方案：配备蓝冰进行发货。所有其他可用尺寸：配备RT，或根据请求配备蓝冰。 | ||
| 制备储备液 | |||
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1 mg | 5 mg | 10 mg |
| 1 mM | 2.223 mL | 11.1151 mL | 22.2301 mL |
| 5 mM | 0.4446 mL | 2.223 mL | 4.446 mL |
| 10 mM | 0.2223 mL | 1.1115 mL | 2.223 mL |
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动物平均体重 | g | |
每只动物给药体积 | ul | |
动物数量 | 只 |
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| % DMSO % % Tween 80 % saline | ||||||||||
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1. 首先保证母液是澄清的；
2.
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Asciminib in Chronic Myeloid Leukemia after ABL Kinase Inhibitor Failure
N Engl J Med 2019 Dec 12;381(24):2315-2326.PMID:31826340DOI:10.1056/NEJMoa1902328.
Background: Asciminib is an allosteric inhibitor that binds a myristoyl site of the BCR-ABL1 protein, locking BCR-ABL1 into an inactive conformation through a mechanism distinct from those for all other ABL kinase inhibitors. Asciminib targets both native and mutated BCR-ABL1, including the gatekeeper T315I mutant. The safety and antileukemic activity of Asciminib in patients with Philadelphia chromosome-positive leukemia are unknown. Methods: In this phase 1, dose-escalation study, we enrolled 141 patients with chronic-phase and 9 with accelerated-phase chronic myeloid leukemia (CML) who had resistance to or unacceptable side effects from at least two previous ATP-competitive tyrosine kinase inhibitors (TKIs). The primary objective was to determine the maximum tolerated dose or the recommended dose (or both) of Asciminib. Asciminib was administered once or twice daily (at doses of 10 to 200 mg). The median follow-up was 14 months. Results: Patients were heavily pretreated; 70% (105 of 150 patients) had received at least three TKIs. The maximum tolerated dose of Asciminib was not reached. Among patients with chronic-phase CML, 34 (92%) with a hematologic relapse had a complete hematologic response; 31 (54%) without a complete cytogenetic response at baseline had a complete cytogenetic response. A major molecular response was achieved or maintained by 12 months in 48% of patients who could be evaluated, including 8 of 14 (57%) deemed to have resistance to or unacceptable side effects from ponatinib. A major molecular response was achieved or maintained by 12 months in 5 patients (28%) with a T315I mutation at baseline. Clinical responses were durable; a major molecular response was maintained in 40 of 44 patients. Dose-limiting toxic effects included asymptomatic elevations in the lipase level and clinical pancreatitis. Common adverse events included fatigue, headache, arthralgia, hypertension, and thrombocytopenia. Conclusions: Asciminib was active in heavily pretreated patients with CML who had resistance to or unacceptable side effects from TKIs, including patients in whom ponatinib had failed and those with a T315I mutation. (Funded by Novartis Pharmaceuticals; ClinicalTrials.gov number, NCT02081378.).
A phase 3, open-label, randomized study of Asciminib, a STAMP inhibitor, vs bosutinib in CML after 2 or more prior TKIs
Blood 2021 Nov 25;138(21):2031-2041.PMID:34407542DOI:10.1182/blood.2020009984.
Patients with chronic myeloid leukemia in chronic phase (CML-CP) resistant/intolerant to ≥2 tyrosine kinase inhibitors (TKIs) are at high risk of experiencing poor outcomes because of disease biology and inadequate efficacy and/or safety of current therapies. Asciminib, a first-in-class BCR-ABL1 inhibitor Specifically Targeting the ABL Myristoyl Pocket (STAMP), has the potential to overcome resistance/intolerance to approved TKIs. In this phase 3, open-label study, patients with CML-CP previously treated with ≥2 TKIs were randomized (2:1) to receive Asciminib 40 mg twice daily vs bosutinib 500 mg once daily. Randomization was stratified by major cytogenetic response (MCyR) status at baseline. The primary objective was to compare the major molecular response (MMR) rate at week 24 for Asciminib vs bosutinib. A total of 233 patients were randomized to Asciminib (n = 157) or bosutinib (n = 76). Median follow-up was 14.9 months. The MMR rate at week 24 was 25.5% with Asciminib and 13.2% with bosutinib. The difference in MMR rate between treatment arms, after adjusting for MCyR at baseline, was 12.2% (95% confidence interval, 2.19-22.30; 2-sided P = .029). Fewer grade ≥3 adverse events (50.6% vs 60.5%) and adverse events leading to treatment discontinuation (5.8% vs 21.1%) occurred with Asciminib than with bosutinib. The study showed a superior efficacy of Asciminib compared with that of bosutinib, together with a favorable safety profile. These results support the use of Asciminib as a new therapy in patients with CML-CP who are resistant/intolerant to ≥2 prior TKIs. This trial was registered at www.clinicaltrials.gov as #NCT03106779.
Discovery of Asciminib (ABL001), an Allosteric Inhibitor of the Tyrosine Kinase Activity of BCR-ABL1
J Med Chem 2018 Sep 27;61(18):8120-8135.PMID:30137981DOI:10.1021/acs.jmedchem.8b01040.
Chronic myelogenous leukemia (CML) arises from the constitutive activity of the BCR-ABL1 oncoprotein. Tyrosine kinase inhibitors (TKIs) that target the ATP-binding site have transformed CML into a chronic manageable disease. However, some patients develop drug resistance due to ATP-site mutations impeding drug binding. We describe the discovery of Asciminib (ABL001), the first allosteric BCR-ABL1 inhibitor to reach the clinic. Asciminib binds to the myristate pocket of BCR-ABL1 and maintains activity against TKI-resistant ATP-site mutations. Although resistance can emerge due to myristate-site mutations, these are sensitive to ATP-competitive inhibitors so that combinations of asciminib with ATP-competitive TKIs suppress the emergence of resistance. Fragment-based screening using NMR and X-ray yielded ligands for the myristate pocket. An NMR-based conformational assay guided the transformation of these inactive ligands into ABL1 inhibitors. Further structure-based optimization for potency, physicochemical, pharmacokinetic, and drug-like properties, culminated in asciminib, which is currently undergoing clinical studies in CML patients.
Asciminib: First Approval
Drugs 2022 Feb;82(2):219-226.PMID:35041175DOI:10.1007/s40265-021-01662-3.
Asciminib (Scemblix®) is an orally administered, small molecule, selective allosteric inhibitor that targets the myristoyl pocket of the BCR-ABL1 tyrosine kinase and is being developed by Novartis for the treatment of haematological malignancies, including Philadelphia chromosome-positive (Ph+) chronic myeloid leukaemia (CML). The drug is active against a number of the single catalytic-site mutations, such as T315I, that confer resistance to conventional tyrosine kinase inhibitors (TKIs) that bind to the ATP-binding site of BCR-ABL1. In October 2021, Asciminib monotherapy was granted accelerated approval for the treatment of adults with Ph+ CML in chronic phase (CML-CP), previously treated with ≥ 2 TKIs, and full approval for the treatment of adults with Ph+ CML-CP with the T315I mutation. The drug is under regulatory review for use as monotherapy in CML in the EU, and is in phase 1-3 development exploring its potential in first-line, later-line and paediatric patients with CML. This article summarizes the milestones in the development of Asciminib leading to this first approval for the treatment of adults with Ph+ CML-CP, previously treated with ≥ 2 TKIs, and Ph+ CML-CP with the T315I mutation.
Asciminib for chronic myeloid leukaemia: Next questions
Br J Haematol 2022 Nov;199(3):322-331.PMID:35729850DOI:10.1111/bjh.18323.
Recent approval of Asciminib, a novel "specifically targeting the ABL myristoyl pocket" (STAMP) BCR-ABL1 inhibitor, for the treatment of chronic myeloid leukaemia (CML) patients who have either failed ≥2 lines of therapy or have the T315I mutation, has provided clinicians with a wider selection of potentially effective treatment options. Asciminib has the attractive twin attributes of high potency directed against BCR-ABL1 and good tolerability based on its limited off-target effects. However, it is unclear exactly where Asciminib will be positioned amongst the other available tyrosine kinase inhibitors (TKIs), especially ponatinib which is also available for the same indications. There are many questions yet to be answered with regard to the optimal use of Asciminib which include its role in the first- and second-line settings, combination therapy with other TKIs, and effectiveness in advanced phase CML. In this review, we discuss the available data on Asciminib while exploring a number of clinical trials in progress. Finally, we provide our opinion based on the current data about where Asciminib is most likely to be the optimal choice, which will hopefully assist clinicians with therapy selection.