Home JAK/STAT JAK inhibitor - Autophagy activator - Mitophagy activator - Apoptosis related activator Ruxolitinib Phosphate For research use only.

Ruxolitinib Phosphate

Synonyms: INCB018424, INC424

Ruxolitinib Phosphate (INCB018424, INC424) is the phosphate salt form of Ruxolitinib. Ruxolitinib 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. Ruxolitinib kills tumor cells through toxic mitophagy. Ruxolitinib induces autophagy and enhances apoptosis.

Ruxolitinib Phosphate Chemical Structure

Ruxolitinib Phosphate Chemical Structure

CAS No. 1092939-17-7

Purity & Quality Control

Ruxolitinib Phosphate Related Products

Signaling Pathway

JAK Signaling Pathways

JAK Signaling Pathway

Cell Data

Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
Sf21 Function assay 1 hr Inhibition of human JAK2 kinase domain expressed in Sf21 cells using EQEDEPEGDYFEWLE as substrate after 1 hr by HTRF assay, IC50=0.0028μM 22591402
Sf21 Function assay 1 hr Inhibition of human JAK1 kinase domain expressed in Sf21 cells using EQEDEPEGDYFEWLE as substrate after 1 hr by HTRF assay, IC50=0.0033μM 22591402
Sf21 Function assay 1 hr Inhibition of human TYK2 kinase domain expressed in Sf21 cells using EQEDEPEGDYFEWLE as substrate after 1 hr by HTRF assay, IC50=0.019μM 22591402
Sf21 Function assay 1 hr Inhibition of human JAK3 kinase domain expressed in Sf21 cells using EQEDEPEGDYFEWLE as substrate after 1 hr by HTRF assay, IC50=0.428μM 22591402
TF1 Function assay 20 mins Inhibition of JAK2 in human TF1 cells assessed as inhibition of EPO-induced STAT5 phosphorylation incubated for 20 mins prior to EPO-induction measured after 30 to 45 mins, EC50=0.012μM 22698084
TF1 Function assay 20 mins Inhibition of JAK1 in human TF1 cells assessed as inhibition of IL6-induced STAT3 phosphorylation incubated for 20 mins prior to IL6-induction measured after 30 to 45 mins, EC50=0.024μM 22698084
SET2 Function assay Inhibition of JAK2 V617F mutant in human SET2 cells assessed as reduction in STAT5 phosphorylation, IC50=0.00184μM 23061660
TF1 Function assay 30 mins Inhibition of JAK2 in human TF1 cells assessed as reduction in STAT5 phosphorylation incubated for 30 mins in presence of human recombinant EPO, IC50=0.00685μM 23061660
T-cells Function assay Inhibition of JAK3/1 in human T cells expressing CD3 assessed as inhibition of IL2-stimulated STAT5a phosphorylation, IC50=0.023μM 23540648
T-cells Function assay Inhibition of JAK2/1 in human T cells expressing CD3 assessed as inhibition of IFNgamma-stimulated STAT1 phosphorylation, IC50=0.031μM 23540648
Sf9 Function assay 1 hr Inhibition of human JAK2 (828-1132) expressed in baculovirus-infected Sf9 cells using EQEDEPEGDYFEWLE as substrate after 1 hr by HTRF assay, Ki=0.0001μM 23668484
Sf9 Function assay 1 hr Inhibition of human JAK1 (837-1142) expressed in baculovirus-infected Sf9 cells using EQEDEPEGDYFEWLE as substrate after 1 hr by HTRF assay, Ki=0.0002μM 23668484
Sf9 Function assay 1 hr Inhibition of human TYK2 (873-1187) expressed in baculovirus-infected Sf9 cells using EQEDEPEGDYFEWLE as substrate after 1 hr by HTRF assay, Ki=0.0005μM 23668484
Sf9 Function assay 1 hr Inhibition of human JAK3 (781-1124) expressed in baculovirus-infected Sf9 cells using EQEDEPEGDYFEWLE as substrate after 1 hr by HTRF assay, Ki=0.0032μM 23668484
CD34+ Function assay 45 mins Inhibition of JAK2 homodimer in human CD34+ cells spiked into human whole blood assessed as inhibition of EPO-induced STAT-5 phosphorylation preincubated for 45 mins followed by EPO addition measured after 15 mins by FACS analysis, IC50=0.677μM 24417533
BA/F3 Antiproliferative assay 72 hrs Antiproliferative activity against mouse BA/F3 cells expressing TEL-JAK1 after 72 hrs by cell titer glo assay 26258521
BA/F3 Antiproliferative assay 72 hrs Antiproliferative activity against mouse BA/F3 cells expressing TEL-JAK2 after 72 hrs by cell titer glo assay 26258521
TALL-1 Function assay 1 uM 3 hrs Inhibition of JAK3 in human TALL-1 cells assessed as inhibition of IL-2 induced STAT5 phosphorylation at 1 uM preincubated for 3 hrs followed by IL-2 induction measured after 30 mins by immunoblotting 26258521
OCL-AML5 Function assay 1 uM 3 hrs Inhibition of JAK2 in human OCL-AML5 cells assessed as inhibition of GM-CSF induced STAT5 phosphorylation at 1 uM preincubated for 3 hrs followed by GM-CSF induction measured after 30 mins by immunoblotting 26258521
CD34+ Function assay Inhibition of JAK2 in human CD34+ cells assessed as inhibition of EPO-mediated cell proliferation, IC50=0.008μM 26927423
PBMC Function assay Inhibition of JAK1 in human PBMC cells assessed as inhibition of IL-6-induced MCP1 secretion, IC50=0.04μM 26927423
PBMC Function assay Inhibition IL-7-indcued STAT5 phosphorylation in human PBMC cells by flow cytometry, IC50=0.448μM 26927423
Sf21 Function assay 60 mins Inhibition of human recombinant JAK2 expressed in Sf21 cells assessed as reduction in Ulight-CAGAGAIETDKEYYTVKD phosphorylation pre-incubated before substrate addition and measured after 60 mins by LANCE detection method, IC50=0.003μM 27137359
Sf21 Function assay 1 hr Inhibition of recombinant human C-terminal 6His-tagged JAK2 (808 to end amino acids) expressed in Sf21 cells measured after 1 hr in presence of ATP by TR-FRET assay, IC50=0.0041μM 27555284
BaF3 Function assay Inhibition of JAK2 V617F mutant expressed in mouse BaF3 cells cells assessed as reduction in cell viability, EC50=0.186μM 27555284
HEL 92.1.7 Antiproliferative assay 3 days Antiproliferative activity against HEL 92.1.7 cells assessed as viable cells measured after 3 days by WST-1 assay, IC50=14.7μM 27555284
HCC827 Function assay 30 uM 24 hrs Inhibition of JAK2 in human gefitinib-resistant HCC827 cells assessed as inhibition of STAT3 phosphorylation at Y705 site at 30 uM measured after 24 hrs by western blotting analysis 27555284
HCC827 Function assay 30 uM 24 hrs Inhibition of JAK2 in wild-type human HCC827 cells assessed as inhibition of STAT3 phosphorylation at Y705 site at 30 uM measured after 24 hrs by western blotting analysis 27555284
HEL Antiproliferative assay 48 hrs Antiproliferative activity against HEL cells harboring JAK2 V617F mutant after 48 hrs by MTT assay, IC50=2.62μM 27774135
K562 Antiproliferative assay 48 hrs Antiproliferative activity against human K562 cells after 48 hrs by MTT assay, IC50=10.3μM 27774135
MOLT4 Antiproliferative assay 48 hrs Antiproliferative activity against human MOLT4 cells after 48 hrs by MTT assay, IC50=15.8μM 27774135
NCI-H23 Antiproliferative assay Antiproliferative activity against human NCI-H23 cells harboring KRAS G12C mutant at 28038940
NCI-H358 Antiproliferative assay Antiproliferative activity against human NCI-H358 cells harboring KRAS G12C mutant at 28038940
A673 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for A673 cells 29435139
SK-N-MC qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SK-N-MC cells 29435139
NB1643 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for NB1643 cells 29435139
LAN-5 qHTS assay qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for LAN-5 cells 29435139
HeLa Function assay 0.1 to 1 uM 1 hr Inhibition of JAK2 in human HeLa cells assessed as reduction in STAT5 phosphorylation at 0.1 to 1 uM after 1 hr by immunoblot analysis 30243158
HeLa Function assay 0.1 to 1 uM 1 hr Inhibition of JAK2 in human HeLa cells assessed as increase in JAK2 phosphorylation at 0.1 to 1 uM after 1 hr by immunoblot analysis 30243158
Sf9 Function assay 1 hr Inhibition of human JAK2 (828 to 1132 residues) expressed in baculovirus infected Sf9 insect cells using EQEDEPEGDYFEWLE as substrate after 1 hr by fluorescence assay, IC50=0.0028μM 30833158
Sf9 Function assay 1 hr Inhibition of human JAK1 (837 to 1142 residues) expressed in baculovirus infected Sf9 insect cells using EQEDEPEGDYFEWLE as substrate after 1 hr by fluorescence assay, IC50=0.0033μM 30833158
HEL Antiproliferative assay 48 hrs Synergistic antiproliferative activity against HEL cells harboring JAK2 V617F mutant assessed as reduction in cell viability after 48 hrs in presence of SAHA by MTT assay, IC50=0.3μM 30901208
K562 Antiproliferative assay 48 hrs Synergistic antiproliferative activity against human K562 cells assessed as reduction in cell viability after 48 hrs in presence of SAHA by MTT assay, IC50=1.03μM 30901208
MOLT4 Antiproliferative assay 48 hrs Antiproliferative activity against human MOLT4 cells assessed as reduction in cell viability after 48 hrs by MTT assay, IC50=15.8μM 30901208
HEL Antiproliferative assay 48 hrs Antiproliferative activity against HEL cells harboring JAK2 V617F mutant assessed as reduction in cell viability after 48 hrs by MTT assay, IC50=18.6μM 30901208
K562 Antiproliferative assay 48 hrs Antiproliferative activity against human K562 cells assessed as reduction in cell viability after 48 hrs by MTT assay, IC50=23.2μM 30901208
A549 Function assay 80 to 400 nM 6 hrs Inhibition of HDAC2 in human A549 cells assessed as increase in acetyl histone H4 level at 80 to 400 nM after 6 hrs by Western blot analysis 30901208
A549 Function assay 80 to 400 nM 6 hrs Inhibition of HDAC1 in human A549 cells assessed as increase in acetyl histone H4 level at 80 to 400 nM after 6 hrs by Western blot analysis 30901208
A549 Function assay 80 to 400 nM 6 hrs Inhibition of HDAC3 in human A549 cells assessed as increase in acetyl histone H4 level at 80 to 400 nM after 6 hrs by Western blot analysis 30901208
A549 Function assay 80 to 400 nM 6 hrs Inhibition of HDAC6 in human A549 cells assessed as increase in acetyl alpha tubulin level at 80 to 400 nM after 6 hrs by Western blot analysis 30901208
HEL Function assay 100 mg/kg 5 days Drug level in tumor of BALB/c nu mouse xenografted with HEL cells at 100 mg/kg/day, ip administered for 5 days and measured 1 hr post-last dose by LC-MS/MS analysis 30901208
Sf9 Function assay 30 secs Inhibition of human recombinant N-terminal hexahistidine tagged JAK2 JH1 catalytic domain (835 to 1132 residues) expressed in baculovirus infected Sf9 cells using Tyr6 peptide as substrate incubated for 30 secs under shaking condition measured after 1 hr , IC50=0.0006μM 30981578
Sf21 Function assay 1 hr Inhibition of recombinant human N-terminal epitope-tagged JAK2 (828 to 1132 residues) expressed in baculovirus infected Sf21 insect cells using EQEDEPEGDYFEWLE as substrate after 1 hr by homogeneous time-resolved fluorescence assay, IC50=0.0028μM 30981578
Sf9 Function assay 30 secs Inhibition of human recombinant N-terminal hexahistidine tagged JAK1 JH1 catalytic domain (854 to 1154 residues) expressed in baculovirus infected Sf9 cells using Tyr6 peptide as substrate incubated for 30 secs under shaking condition measured after 1 hr , IC50=0.004μM 30981578
Sf9 Function assay Binding affinity to human recombinant N-terminal hexahistidine tagged JAK2 JH1 catalytic domain (835 to 1132 residues) expressed in baculovirus infected Sf9 cells assessed as dissociation constant by surface plasmon resonance assay, Kd=0.0282μM 30981578
Sf9 Function assay 30 secs Inhibition of human recombinant C-terminal hexahistidine tagged JAK3 JH1 catalytic domain (811 to 1124 residues) expressed in baculovirus infected Sf9 cells using Tyr6 peptide as substrate incubated for 30 secs under shaking condition measured after 1 hr , IC50=0.051μM 30981578
HEL Antiproliferative assay 3 days Antiproliferative activity against HEL cells harboring JAK2 V617F mutant measured after 3 days by CCK8 assay, IC50=7.639μM 30981578
insect cells Function assay 10 mins Inhibition of recombinant human N-terminal GST-tagged JAK1 (866 to 1154 residues) expressed in insect cells using FITC-labeled C6-KKHTDDGYMPMSPGVA-NH peptide as substrate after 10 mins in presence of 5 mM ATP by caliper mobility shift assay, IC50=0.02μM 32297743
insect cells Function assay 10 mins Inhibition of recombinant human N-terminal GST-tagged JAK2 (831 to 1132 residues) expressed in insect cells using 5FAM-labeled GEEPLYWSFPAKKK-NH2 peptide as substrate after 10 mins in presence of 5 mM ATP by caliper mobility shift assay, IC50=0.02μM 32297743
BAF3 Cytotoxicity assay 48 hrs Cytotoxicity against mouse BAF3 cells expressing JAK2 V617F mutant after 48 hrs by CellTiterGlo assay, IC50=0.126μM ChEMBL
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Biological Activity

Description Ruxolitinib Phosphate (INCB018424, INC424) is the phosphate salt form of Ruxolitinib. Ruxolitinib 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. Ruxolitinib kills tumor cells through toxic mitophagy. Ruxolitinib induces autophagy and enhances apoptosis.
Targets
JAK2 [1]
(Cell-free assay)		 JAK1 [1]
(Cell-free assay)
2.8 nM 3.3 nM
In vitro
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]
Kinase Assay 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 Cell lines Ba/F3 and HEL cells
Concentrations 3 μM
Incubation Time 48 h
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.
In Vivo
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]
Animal Research Animal Models JAK2V617F-driven mouse model
Dosages 180 mg/kg
Administration o.g.
NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT06310304 Active not recruiting
Healthy Participants
Incyte Corporation
 March 26 2024 Phase 1
NCT02596347 Completed
Chronic Beryllium Disease (CBD)|Beryllium Sensitization (BeS)
National Jewish Health
 April 2015 --

Chemical Information & Solubility

Molecular Weight 404.36 Formula

C17H18N6.H3O4P
CAS No. 1092939-17-7 SDF --
Smiles C1CCC(C1)C(CC#N)N2C=C(C=N2)C3=C4C=CNC4=NC=N3.OP(=O)(O)O
Storage (From the date of receipt)

In vitro
Batch:

DMSO : 81 mg/mL ( (200.31 mM) Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Ethanol : 9 mg/mL

Water : Insoluble


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