S-Ruxolitinib (INCB018424)

Catalog No.S2902

S-Ruxolitinib (INCB018424) Chemical Structure

Molecular Weight(MW): 306.37

S-Ruxolitinib is the chirality of INCB018424, which is the first potent, selective, JAK1/2 inhibitor to enter the clinic with IC50 of 3.3 nM/2.8 nM, >130-fold selectivity for JAK1/2 versus JAK3. Phase 3.

Size Price Stock Quantity  
In DMSO USD 330 In stock
USD 270 In stock
USD 370 In stock
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Biological Activity

Description S-Ruxolitinib is the chirality of INCB018424, which is the first potent, selective, JAK1/2 inhibitor to enter the clinic with IC50 of 3.3 nM/2.8 nM, >130-fold selectivity for JAK1/2 versus JAK3. Phase 3.
Targets
JAK2 [1]
(Cell-free assay)
JAK1 [1]
(Cell-free assay)
TYK2 [1]
(Cell-free assay)
2.8 nM 3.3 nM 19 nM
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]

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.
Cell Research:[1]
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  • Cell lines: Ba/F3 and HEL cells
  • Concentrations: 3 μM
  • Incubation Time: 48 hours
  • Method: Cells are seeded at 2 × 103/well of white bottom 96-well plates, treated with INCB018424 from DMSO stocks (0.2% final DMSO concentration), and incubated for 48 hours at 37 ℃ with 5% CO2. Viability is measured by cellular ATP determination using the Cell-Titer Glo luciferase reagent or viable cell counting. Values are transformed to percent inhibition relative to vehicle control, and IC50 curves are fitted according to nonlinear regression analysis of the data using PRISM GraphPad.
    (Only for Reference)
Animal Research:[1]
+ Expand
  • Animal Models: JAK2V617F-driven mouse model
  • Formulation: 5% dimethyl acetamide, 0.5% methocellulose
  • Dosages: 180 mg/kg
  • Administration: Oral gavage
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 61 mg/mL (199.1 mM)
Ethanol 61 mg/mL (199.1 mM)
Water 5 mg/mL (16.32 mM)
In vivo Add solvents individually and in order:
0.5% CMC+0.25% Tween 80
30 mg/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
Formula

C17H18N6

CAS No. 941685-37-6
Storage powder
in solvent
Synonyms N/A

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Clinical Trial Information

NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT03011892 Recruiting Atopic Dermatitis Incyte Corporation December 2016 Phase 2
NCT02553330 Active, not recruiting Alopecia Areata Incyte Corporation October 2015 Phase 2
NCT01644110 Recruiting Primary Myelofibrosis|Secondary Myelofibrosis|PMF|SMF|Post-PV MF|Post-ET MF University of Ulm August 2013 Phase 1|Phase 2
NCT01348490 Recruiting Primary Myelofibrosis|Post Essential Thrombocythemia-myelofibrosis|Post Polycythemia Vera-myelofibrosis Incyte Corporation June 2011 Phase 2
NCT00934544 Completed Myelofibrosis Novartis Pharmaceuticals|Novartis July 2009 Phase 3
NCT00778700 Completed Plaque Psoriasis Incyte Corporation October 2008 Phase 2

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID