Ruxolitinib (INCB018424)
Catalog No.S1378
Molecular Weight(MW): 306.37
Ruxolitinib (INCB018424) is the first potent, selective, JAK1/2 inhibitor to enter the clinic with IC50 of 3.3 nM/2.8 nM in cell-free assays, >130-fold selectivity for JAK1/2 versus JAK3.
Purity & Quality Control
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Biological Activity
| Description | Ruxolitinib (INCB018424) is the first potent, selective, JAK1/2 inhibitor to enter the clinic with IC50 of 3.3 nM/2.8 nM in cell-free assays, >130-fold selectivity for JAK1/2 versus JAK3. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| In vitro |
INCB018424 potently and selectively inhibits JAK2V617F-mediated signaling and proliferation in Ba/F3 cells and HEL cells. INCB018424 markedly increases apoptosis in a dose dependent manner in Ba/F3 cells. INCB018424 (64 nM) results in a doubling of cells with depolarized mitochondria in Ba/F3 cells. INCB018424 inhibits proliferating of erythroid progenitors from normal donors and polycythemia vera patients with IC50 of 407 nM and 223 nM, respectively. INCB018424 demonstrates remarkable potency against erythroid colony formation with IC50 of 67nM. [1] |
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| Cell Data |
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| In vivo | INCB018424 (180 mg/kg, orally, twice a day) results in survive rate of greater than 90% by day 22 in a JAK2V617F-driven mouse model. INCB018424 (180 mg/kg, orally, twice a day) markedly reduces splenomegaly and circulating levels of inflammatory cytokines, and preferentially eliminated neoplastic cells, resulting in significantly prolonged survival without myelosuppressive or immunosuppressive effects in a JAK2V617F-driven mouse model. [1] The primary end point is reached in 41.9% of patients in the Ruxolitinib group as compared with 0.7% in the placebo group in the double-blind trial of myelofibrosis. Ruxolitinib results in maintaining of reduction in spleen volume and improvement of 50% or more in the total symptom score. [2] A total of 28% of the patients in the Ruxolitinib (15 mg twice daily) group has at least a 35% reduction in spleen volume at week 48 in patients with myelofibrosis, as compared with 0% in the group receiving the best available therapy. The mean palpable spleen length has decreased by 56% with Ruxolitinib but has increased by 4% with the best available therapy at week 48. Patients in the ruxolitinib group has an improvement in overall quality-of-life measures and a reduction in symptoms associated with myelofibrosis. [3] |
Protocol
| Kinase Assay:[1] |
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Binding assay: Recombinant proteins are expressed using Sf21 cells and baculovirus vectors and purified with affinity chromatography. JAK kinase assays use a homogeneous time-resolved fluorescence assay with the peptide substrate (-EQEDEPEGDYFEWLE). Each enzyme reaction is carried out with Ruxolitinib or control, JAK enzyme, 500 nM peptide, adenosine triphosphate (ATP; 1mM), and 2% dimethyl sulfoxide (DMSO) for 1 hour. The 50% inhibitory concentration (IC50) is calculated as INCB018424 concentration required for inhibition of 50% of the fluorescent signal. |
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| Cell Research:[1] |
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| Animal Research:[1] |
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Solubility (25°C)
| In vitro | DMSO | 61 mg/mL (199.1 mM) |
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| Ethanol | 61 mg/mL (199.1 mM) | |
| Water | Insoluble | |
| In vivo | Add solvents to the product individually and in order(Data is from Selleck tests instead of citations): 2% DMSO+30% PEG 300+ddH2O For best results, use promptly after mixing. |
5mg/mL |
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
Chemical Information
| Molecular Weight | 306.37 |
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| Formula | C17H18N6 |
| CAS No. | 941678-49-5 |
| Storage | powder |
| in solvent | |
| Synonyms | N/A |
Bio Calculators
Molarity Calculator
Calculate the mass, volume or concentration required for a solution. The Selleck molarity calculator is based on the following equation:
Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)
*When preparing stock solutions, please always use the batch-specific molecular weight of the product found on the via label and MSDS / COA (available on product pages).
Dilution Calculator
Calculate the dilution required to prepare a stock solution. The Selleck dilution calculator is based on the following equation:
Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
This equation is commonly abbreviated as: C1V1 = C2V2 ( Input Output )
* When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and MSDS / COA (available online).
Molecular Weight Calculator
Enter the chemical formula of a compound to calculate its molar mass and elemental composition:
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Molarity Calculator
Clinical Trial Information
| NCT Number | Recruitment | Conditions | Sponsor/Collaborators | Start Date | Phases |
|---|---|---|---|---|---|
| NCT03571321 | Not yet recruiting | Acute Lymphoblastic Leukemia|ALL Childhood|ALL | University of Chicago|Incyte Corporation | September 5 2019 | Phase 1 |
| NCT03571321 | Not yet recruiting | Acute Lymphoblastic Leukemia|ALL Childhood|ALL | University of Chicago|Incyte Corporation | September 5 2019 | Phase 1 |
| NCT03801434 | Not yet recruiting | BCR-JAK2 Fusion Protein Expression|Blasts 20 Percent or Less of Peripheral Blood White Cells|Blasts More Than 5 Percent of Bone Marrow Nucleated Cells|Blasts More Than 5 Percent of Peripheral Blood White Cells|Blasts Under 20 Percent of Bone Marrow Nucleated Cells|Chronic Eosinophilic Leukemia Not Otherwise Specified|Eosinophilia|Hepatomegaly|Hypereosinophilic Syndrome|JAK2 Gene Mutation|Splenomegaly|TEL-JAK2 Fusion Protein Expression | Stanford University|Incyte Corporation | June 19 2019 | Phase 2 |
| NCT03801434 | Not yet recruiting | BCR-JAK2 Fusion Protein Expression|Blasts 20 Percent or Less of Peripheral Blood White Cells|Blasts More Than 5 Percent of Bone Marrow Nucleated Cells|Blasts More Than 5 Percent of Peripheral Blood White Cells|Blasts Under 20 Percent of Bone Marrow Nucleated Cells|Chronic Eosinophilic Leukemia Not Otherwise Specified|Eosinophilia|Hepatomegaly|Hypereosinophilic Syndrome|JAK2 Gene Mutation|Splenomegaly|TEL-JAK2 Fusion Protein Expression | Stanford University|Incyte Corporation | June 19 2019 | Phase 2 |
| NCT03610971 | Not yet recruiting | Chronic Phase Chronic Myeloid Leukemia|Chronic Myeloid Leukemia Chronic Phase | H. Lee Moffitt Cancer Center and Research Institute|H. Jean Khoury Cure CML Consortium|Incyte Corporation | May 2019 | Phase 2 |
| NCT03722407 | Not yet recruiting | Chronic Myelomonocytic Leukemia|Leukemia | H. Lee Moffitt Cancer Center and Research Institute|Incyte Corporation | May 1 2019 | Phase 2 |
Tech Support
Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.
Tel: +1-832-582-8158 Ext:3
If you have any other enquiries, please leave a message.
Frequently Asked Questions
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Question 1:
What is the difference between S2902 and S1378 which seem to have same structure formula according to the product information?
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Answer:
These two chemicals are the two different chiral forms of Ruxolitinib. S2902 S-Ruxolitinib is the S form and S1378 Ruxolitinib is the D form. One of the carbon atoms in this molecule is asymmetric, making the two molecules mirror images of each other. The biological activities of these two molecules can be very different because of the confirmation differences.
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Question 2:
How about the half-life of the compound (Ruxolitinib)? How long is the duration of the inhibitory effect on JAK-STAT signaling?
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Answer:
The half-life of this compound in body is about 2~3 hours according to previous study. Generally, it is longer in vitro culture medium than in vivo. In paper, Ruxolitinib was also used for 24hours. http://www.bloodjournal.org/cgi/pmidlookup?view=long&pmid=24711661.
