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Purity: ≥98%
MELK-8a is a novel, highly potent and selective MELK (Maternal Embryonic Leucine Zipper Kinase) inhibitor.MELK kinase has been suggested to be a key player in the development of tumors. A subset of basal-like breast cancer cell lines with high MELK expression experience growth inhibition as a result of genetic MELK depletion. MELK is involved in the regulation of cell cycle. Short hairpin ribonucleic acid (shRNA)-mediated MELK knockdown in cellular models is recapitulated by MELK inhibitors 8a. It was discovered that a novel hydrophobic collapse caused by fluorine locked the ligand in its bioactive conformation and produced a 20-fold increase in potency. These brand-new pharmacological inhibitors had a good safety profile and high levels of in vivo exposure, which may open the door for more in vivo testing.
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| Enzyme Assay |
MELK-8a hydrochloride is a novel maternal embryonic leucine zipper kinase (MELK) inhibitor with an IC50 of 2 nM.
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| Cell Assay |
MELK is involved in the regulation of cell cycle and its genetic depletion leads to growth inhibition in a subset of high MELK-expressing basal-like breast cancer cell lines. MDA-MB-468 and MCF7 cells are seeded in growth medium into 96-well plates at 1000 and 4000 cells/well, respectively. Sixteen hours after plating, MELK-8a are added and incubated for 7 days. For each well, ATPLite reagent is added and incubated. Luminescence is measured on an multilabel plate reader.
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| References |
| Molecular Formula |
C25H32N6O
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| Molecular Weight |
432.56
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| CAS # |
1922153-17-0
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| Related CAS # |
MELK-8a hydrochloride;2096992-20-8
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| SMILES |
CN1CCN(CC1)C2=CC=C(C=C2)N3C=C(C=N3)C4=C(C=NC=C4)OCC5CCNCC5
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| InChi Key |
BLFBSGVUERKSST-UHFFFAOYSA-N
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| InChi Code |
InChI=1S/C25H32N6O/c1-29-12-14-30(15-13-29)22-2-4-23(5-3-22)31-18-21(16-28-31)24-8-11-27-17-25(24)32-19-20-6-9-26-10-7-20/h2-5,8,11,16-18,20,26H,6-7,9-10,12-15,19H2,1H3
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| Chemical Name |
1-methyl-4-[4-[4-[3-(piperidin-4-ylmethoxy)pyridin-4-yl]pyrazol-1-yl]phenyl]piperazine
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| Storage |
Powder -20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month |
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| Shipping Condition |
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
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| Solubility (In Vitro) |
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| Solubility (In Vivo) |
Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.
Injection Formulations
Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline)(e.g. IP/IV/IM/SC) *Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution. Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil) Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals). View More
Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)] Oral Formulations
Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium) Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals). View More
Oral Formulation 3: Dissolved in PEG400 (Please use freshly prepared in vivo formulations for optimal results.) |
| Preparing Stock Solutions | 1 mg | 5 mg | 10 mg | |
| 1 mM | 2.3118 mL | 11.5591 mL | 23.1182 mL | |
| 5 mM | 0.4624 mL | 2.3118 mL | 4.6236 mL | |
| 10 mM | 0.2312 mL | 1.1559 mL | 2.3118 mL |
*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.
Calculation results
Working concentration： mg/mL；
Method for preparing DMSO stock solution： mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.
Method for preparing in vivo formulation:：Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O，mix and clarify.
(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
(2) Be sure to add the solvent(s) in order.
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