Masitinib
Based on 6 publication(s) in Google Scholar
Masitinib (AB1010) is a potent, orally bioavailable, and selective inhibitor of c-Kit (IC50=200 nM for human recombinant c-Kit). It also inhibits PDGFRα/β (IC50s=540/800 nM), Lyn (IC50= 510 nM for LynB), Lck, and, to a lesser extent, FGFR3 and FAK. Masitinib (AB1010) has anti-proliferative, pro-apoptotic activity and low toxicity.
For research use only. We do not sell to patients.
- Purity: 99.66%
- CAS No.: 790299-79-5
- Formula: C28H30N6OS
- Molecular Weight:498.64
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Storage:Powder -20°C, 3 years , 4°C, 2 years ; In solvent -80°C, 1 year , -20°C, 6 months
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Biological Activity
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Chemical Information
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Solvent & Solubility
- Protocol
- Purity & Documentation
- References
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Help & FAQs
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Publications Citing Use of MedChemExpress (MCE) Masitinib
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Biological Activity
IC50: 200 nM (Kit), 540 nM (PDGFRα), 800 nM (PDGFRβ), 510 nM (LynB)[1]
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Cell Line
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Type | Value | Description | References |
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| A549 | EC50 |
3.2 μM
Compound: Masitinib
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Antiproliferative activity against human A549 cells assessed as inhibition of cell growth measured after 72 hrs by MTT assay
Antiproliferative activity against human A549 cells assessed as inhibition of cell growth measured after 72 hrs by MTT assay
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[PMID: 37659195] |
| BMMC | IC50 |
0.1 μM
Compound: 1
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Antiproliferative activity against BALB/c mouse BMMC after 48 hrs by MTT assay
Antiproliferative activity against BALB/c mouse BMMC after 48 hrs by MTT assay
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[PMID: 30078608] |
| Vero C1008 | EC50 |
3.2 μM
Compound: 8
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Antiviral activity against SARS-CoV-2 infected in African green monkey Vero E6 cells assessed as reduction in viral replication
Antiviral activity against SARS-CoV-2 infected in African green monkey Vero E6 cells assessed as reduction in viral replication
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[PMID: 37244162] |
Masitinib is a competitive inhibitor against ATP at concentrations ≤500 nM. Masitinib also potently inhibits recombinant PDGFR and the intracellular kinase Lyn, and to a lesser extent, fibroblast growth factor receptor 3. In contrast, masitinib demonstrates weak inhibition of Abl and c-Fms. Masitinib more strongly inhibits degranulation, cytokine production, and bone marrow mast cell migration than imatinib. In Ba/F3 cells expressing human wild-type Kit, masitinib inhibits SCF (stem cell factor)-induced cell proliferation with an IC50 of 150 nM, while the IC50 for inhibition of IL-3-stimulated proliferation is at approximately >10 μM. In Ba/F3 cells expressing PDGFRα, masitinib inhibits PDGF-BB-stimulated proliferation and PDGFRα tyrosine phosphorylation with IC50 of 300 nM. Masitinib also causes inhibition of SCF-stimulated tyrosine phosphorylation of human Kit in mastocytoma cell-lines and BMMC. Masitinib inhibits Kit gain-of-function mutants, including V559D mutant and Δ27 mouse mutant with IC50 of 3 and 5 nM in Ba/F3 cells. Masitinib inhibits the cell proliferation of mastocytoma cell lines including HMC-1α155 and FMA3 with IC50 of 10 and 30 nM, respectively[1]. Masitinib inhibits cell growth and PDGFR phosphorylation in two novel ISS cell lines, which suggest that Masitinib displays activity against both primary and metastatic ISS cell line and may aid in the clinical management of ISS[2].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Masitinib (12.5 mg/kg/d, p.o.) increases overall TTP (time-to-tumor progression) compared with placebo in dogs[3].
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Chemical Information
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CAS No. 790299-79-5
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Appearance Solid
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Molecular Weight 498.64
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Formula C28H30N6OS
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Color White to yellow
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SMILES
O=C(NC1=CC=C(C(NC2=NC(C3=CC=CN=C3)=CS2)=C1)C)C4=CC=C(CN5CCN(CC5)C)C=C4
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Synonyms
AB1010
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Shipping
Room temperature in continental US; may vary elsewhere.
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Storage
Powder -20°C 3 years 4°C 2 years In solvent -80°C 1 year -20°C 6 months
Publications (6)
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Journal Impact Factor
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Most Recent
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Science
2021 Nov 26;374(6571):1099-1106. PMID: 34648371 -
Sci Transl Med
PP2A inhibition is a druggable MEK inhibitor resistance mechanism in KRAS-mutant lung cancer cells. [Abstract]2018 Jul 18;10(450):eaaq1093. PMID: 30021885 -
Ecotoxicol Environ Saf
Dibutyl phthalate promotes central precocious puberty through primordial follicle activation by downregulating BMP15. [Abstract]2025 Jun 4:300:118460. PMID: 40472697 -
Eur J Pharmacol
Therapeutic effects of masitinib on abnormal mechanoreception in a mouse model of tourniquet-induced extremity ischemia-reperfusion. [Abstract]2021 Nov 15:911:174549. PMID: 34619116 -
BMC Vet Res
The secondary KIT mutation p.Ala510Val in a cutaneous mast cell tumour carrying the activating mutation p.Asn508Ile confers resistance to masitinib in dogs. [Abstract]2020 Feb 19;16(1):64. PMID: 32075643 -
Solvent & Solubility
DMSO : 100 mg/mL (200.55 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)
H2O : < 0.1 mg/mL (insoluble)
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 1 year; -20°C, 6 months. When stored at -80°C, please use it within 1 year. When stored at -20°C, please use it within 6 months.
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 1 year; -20°C, 6 months. When stored at -80°C, please use it within 1 year. When stored at -20°C, please use it within 6 months.
Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
Select the appropriate dissolution method based on your experimental animal and administration route.
- For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
- To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for In Vivo experiments, it is recommended to prepare freshly and use it on the same day.
- The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.
Add each solvent one by one: 10% DMSO 40% PEG300 5% Tween-80 45% Saline
Solubility: ≥ 2.5 mg/mL (5.01 mM); Clear solution
This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.
Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
Add each solvent one by one: 10% DMSO 90% (20% SBE-β-CD in Saline)
Solubility: ≥ 2.5 mg/mL (5.01 mM); Clear solution
This protocol yields a clear solution of ≥ 2.5 mg/mL (saturation unknown).
Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (25.0 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
Please enter the basic information of animal experiments:
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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
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%DMSO +
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
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%+
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+%Tween-80 + +
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%Saline +
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Working solution concentration: 0.22 mg/mL
Method for preparing stock solution: mg drug dissolved in μL DMSO. Stock solution concentration: mg/mL.
1. Take μL DMSO stock solution;
2. Add μL .
μL , mix evenly;
3. Then add μL Tween 80, mix evenly;
4. Then add μL
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Protocol
A 96-well microtitre plateis coated overnight with 0.25 mg/mL poly(Glu,Tyr 4:1), rinsed twice with 250 µL of washing buffer (10 mM phosphate-buffered saline [pH 7.4] and 0.05% Tween 20) and dried for 2 hours at room temperature. Assays are performed at room temperature with a final volume of 50 µL in kinase buffer (10 mM MgCl2, 1 mM MnCl2, 1 mM sodium orthovanadate, 20 mM HEPES, pH 7.8) containing ATP at a concentration of at least twice the Km for each enzyme and an appropriate amount of recombinant enzyme to ensure a linear reaction rate. Reactions are initiated upon introduction of the enzyme and terminated with the addition of one reaction volume (50 μL) of 100 mM EDTA per 5mol/Lurea mix. Plates are washed three times and incubated with 1:30,000 horseradish peroxidase-conjugated anti-phosphotyrosine monoclonal antibody, then washed three times and incubated with tetramethylbenzidine. The final reaction product is quantified by spectrophotometry at 450 nm.
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
For the assay of Ba/F3 cell proliferation, microtitre plates are seeded with a total of 104 cells/well in 100 μL of RPMI 1640 medium with 10% foetal bovine serum at 37°C. These are supplemented, or not, with either 0.1% conditioned medium from X63-IL-3 cells or 250 ng/mL murine SCF. The murine SCF, which activates Kit, is purified from the conditioned medium of SCF-producing CHO cells. Cells are grown for 48 hours at 37°C with masitinib and then incubated with 10 μL/well of WST-1 reagent for 3 hours at 37°C. The amount of formazan dye formed is quantified by its absorbance at 450 nm using a scanning multiwell spectrophotometer. A blank well without cells is used as a background control for the spectrophotometer.
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Male Nog-SCID mice (7 weeks old) are under specific pathogen-free conditions at 20±1°C in a 12-hour light/12-hour dark cycle and ad libitum access to food and filtered water. Mia Paca-2 cells are cultured as described above. At day 0 (D0), mice are injected with 107 Mia Paca-2 cells in 200 µL PBS into the right flank. Tumours are allowed to grow for 1.5 to 4 weeks until the desired tumour size is reached (appr 200 mm3). At day 28, animals are allocated into four treatment groups (n=7 to 8 per group), ensuring that each group's mean body weight and tumour volume are well matched. Treatment is then administered for up to 4 weeks, after which time the animals are sacrificed. Treatments consisted of either: a) daily sterile water for the control group, b) an intraperitoneal (i.p.) injection of 50 mg/kg gemcitabine twice a week, c) daily gavage with 100 mg/kg masitinib, or d) combined i.p injection of 50 mg/kg gemcitabine twice a week and daily gavage with 100 mg/kg masitinib. Tumour size is measured with callipers and tumour volume is estimated using the formula: volume=(length × width2)/2. The tumour growth inhibition ratio is calculated as (100) × (median tumour volume of treated group)/(median tumour volume of control group).
MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Purity & Documentation
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Data Sheet (279 KB)
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SDS (393 KB)
- English - EN (393 KB)
- Français - FR (393 KB)
- Deutsch - DE (393 KB)
- Norwegian - NO (393 KB)
- Español - ES (393 KB)
- Swedish - SV (393 KB)
- Italian - IT (393 KB)
- Portuguese - PT (393 KB)
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Handling Instructions (2659 KB)
References
[2]. Lawrence J, et al. Masitinib demonstrates anti-proliferative and pro-apoptotic activity in primary and metastatic feline injection-site sarcoma cells. Vet Comp Oncol, 2011, doi: 10.1111/j.1476-5829.2011.00291.x. [Content Brief]
[3]. Hahn KA, et al. Masitinib is safe and effective for the treatment of canine mast cell tumors. J Vet Intern Med, 2008, 22(6), 1301-1309. [Content Brief]
[4]. Marech I, et al. Masitinib (AB1010), from canine tumor model to human clinical development: where we are? Crit Rev Oncol Hematol. 2014 Jul;91(1):98-111. [Content Brief]
Complete Stock Solution Preparation Table
Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 1 year; -20°C, 6 months. When stored at -80°C, please use it within 1 year. When stored at -20°C, please use it within 6 months.
| Optional Solvent | Concentration Solvent Mass | 1 mg | 5 mg | 10 mg | 25 mg |
|---|---|---|---|---|---|
| DMSO | 1 mM | 2.0055 mL | 10.0273 mL | 20.0545 mL | 50.1364 mL |
| 5 mM | 0.4011 mL | 2.0055 mL | 4.0109 mL | 10.0273 mL | |
| 10 mM | 0.2005 mL | 1.0027 mL | 2.0055 mL | 5.0136 mL | |
| 15 mM | 0.1337 mL | 0.6685 mL | 1.3370 mL | 3.3424 mL | |
| 20 mM | 0.1003 mL | 0.5014 mL | 1.0027 mL | 2.5068 mL | |
| 25 mM | 0.0802 mL | 0.4011 mL | 0.8022 mL | 2.0055 mL | |
| 30 mM | 0.0668 mL | 0.3342 mL | 0.6685 mL | 1.6712 mL | |
| 40 mM | 0.0501 mL | 0.2507 mL | 0.5014 mL | 1.2534 mL | |
| 50 mM | 0.0401 mL | 0.2005 mL | 0.4011 mL | 1.0027 mL | |
| 60 mM | 0.0334 mL | 0.1671 mL | 0.3342 mL | 0.8356 mL | |
| 80 mM | 0.0251 mL | 0.1253 mL | 0.2507 mL | 0.6267 mL | |
| 100 mM | 0.0201 mL | 0.1003 mL | 0.2005 mL | 0.5014 mL |
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