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.
Cited by 34 Publications
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STAT3 phosphorylation as determined by phospho flow, mixed lymphocyte reactions containing BALB/c spleen-derived CD4+ T cells co-cultured with or without C57BL/6 BM-derived DC preactivated with 20 ng/mL LPS.
Blood 2014 123(24), 3832-42. Ruxolitinib (INCB018424) purchased from Selleck.
BMDMs were isolated from wild-type mice and incubated in the different concentrations of Ruxolitinib for 1 h before stimulation with 500 U/ml IFN-β for 30 min. Levels of GAPDH as well as total and phospho-Tyr705 STAT3 were determined by immunoblotting.
J Immunol 2012 189(6), 2784-92. Ruxolitinib (INCB018424) purchased from Selleck.
Miniscule 10 PFU amount of VA7-EGFP results in productive infection only in CT26LacZ cells whereas the self-limiting infection can be rescued with JAK/STAT inhibitor Ruxolitinib in CT26WT cells counteracting also the effects of exogenous IFNβ (100 U/ml) pre-treatment. Scale bar: 200 um.
Gene Ther 2014 10.1038/gt.2014.83. Ruxolitinib (INCB018424) purchased from Selleck.
HS578T cells were treated with indicated amount of inhibitor for 18 hr. The cells were lysed by cell lysis buffer (20 mM Tris-Cl (pH 8.0); 0.5 M NaCl; 0.25% Triton X-100; 1 mM EDTA; 1 mM EGTA; 10 mM β-glycerophosphate; 10 mM NaF; 300 µM Na3VO4; 1 mM benzamidine) containing 1 mM DTT and 2 µM PMSF. Western blot analyses were performed using cleared cell lysates resolved on sodium dodecyl sulfate (SDS)-polyacrylamide gels, transferred onto polyvinylidene difluoride (PVDF) membranes (Millipore, Billerica, MA), and probed with specific antibodies using standard procedures. Chemiluminescence reagent was purchased from Thermo Scientific (Rockford, IL). Horseradish peroxidase-conjugated secondary antibodies from Sigma (St. Louis, MO).
Yong Weon Yi Georgetown University. Ruxolitinib (INCB018424) purchased from Selleck.
Purity & Quality Control
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2. For more details, such as half maximal inhibitory concentrations (IC50s) and working concentrations of each inhibitor, please click on the link of the inhibitor of interest.
3. "+" indicates inhibitory effect. Increased inhibition is marked by a higher "+" designation.
4. Orange "√" refers to compounds which do inhibitory effects on the related isoform, but without specific value.
|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.|
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. 
|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.  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.  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. |
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.
|In vitro||DMSO||61 mg/mL (199.1 mM)|
|In vivo||2% DMSO+30% PEG 300+ddH2O||5mg/mL|
* 1 mg/ml means slightly soluble or insoluble.
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Clinical Trial Information
|NCT Number||Recruitment||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT02396628||Not yet recruiting||Graft vs Host Disease||Prof. Dr. Nikolas von Bubnoff|Clinical Trials Unit Freiburg|University Hospital Freiburg||September 2016||Phase 2|
|NCT02784496||Not yet recruiting||Myelofibrosis||M.D. Anderson Cancer Center|Incyte Corporation||August 2016||Phase 2|
|NCT02723994||Not yet recruiting||B-cell Acute Lymphoblastic Leukemia||Incyte Corporation|Childrens Oncology Group||August 2016||Phase 2|
|NCT02718300||Not yet recruiting||Myelofibrosis||Incyte Corporation||June 2016||Phase 2|
|NCT02713386||Not yet recruiting||Fallopian Tube Carcinosarcoma|Fallopian Tube Clear Cell Adenocarcinoma|Fallopian Tube Endometrioid Adenocarcinoma|Fallopian Tube Serous Neoplasm|High Grade Ovarian Serous Adenocarcinoma|Ovarian Carcinosarcoma|Ovarian Clear Cell Adenocarcinoma|Ovarian Endometrioid Adenocarcinoma|Primary Peritoneal Serous Adenocarcinoma|Stage IIIA Fallopian Tube Cancer|Stage IIIA Ovarian Cancer|Stage IIIA Primary Peritoneal Cancer|Stage IIIB Fallopian Tube Cancer|Stage IIIB Ovarian Cancer|Stage IIIB Primary Peritoneal Cancer|Stage IIIC Fallopian Tube Cancer|Stage IIIC Ovarian Cancer|Stage IIIC Primary Peritoneal Cancer|Stage IV Fallopian Tube Cancer|Stage IV Ovarian Cancer|Stage IV Primary Peritoneal Cancer||NRG Oncology|National Cancer Institute (NCI)||May 2016||Phase 1|Phase 2|
|NCT02598297||Recruiting||Early Myelofibrosis With High Molecular Risk Mutations.||Novartis Pharmaceuticals|Novartis||February 2016||Phase 3|
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Frequently Asked Questions
What is the difference between S2902 and S1378 which seem to have same structure formula according to the product information?
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.
How about the half-life of the compound (Ruxolitinib)? How long is the duration of the inhibitory effect on JAK-STAT signaling?
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.