VX-745

Name: VX-745
Brand: Selleck Chemicals
SKU: S1458
Rating: 5 (7 reviews)

For research use only.

Catalog No.S1458

7 publications

Molecular Weight(MW): 436.26

VX-745 is a potent and selective inhibitor of p38α with IC50 of 10 nM, 22-fold greater selectivity versus p38β and no inhibition to p38γ.

Selleck's VX-745 has been cited by 7 publications

Sci Rep, 2020, 10(1):3479

PubMed: 32103032 ( click the link to review the publication )

J Pharmacol Exp Ther, 2019, 370(2):219-230

PubMed: 31189728 ( click the link to review the publication )

J Biol Chem, 2018, 293(7):2302-2317

PubMed: 29229781 ( click the link to review the publication )

FASEB J, 2018, 10.1096/fj.201801977R

PubMed: 30526042 ( click the link to review the publication )

Biochem J, 2016, 473(12):1759-68

PubMed: 27071417 ( click the link to review the publication )

Br J Pharmacol, 2012, 166(3):858-76

PubMed: 22250956 ( click the link to review the publication )

Mol Cell Proteomics, 2012, 11(6):M112.017764

PubMed: 22345495 ( click the link to review the publication )

1 Customer Review

A) TRAP staining of BMMs cultured with M-CSF and RANKL for 7 d in the presence of SB203580 (50 nM) or VX-745 (50 nM). B) Bone slice assay indicated the effects of compounds on bone resorption.

FASEB J, 2018, doi:10.1096/fj.201801977R. VX-745 purchased from Selleck.

Purity & Quality Control

Choose Selective p38 MAPK Inhibitors

Biological Activity

Description

VX-745 is a potent and selective inhibitor of p38α with IC50 of 10 nM, 22-fold greater selectivity versus p38β and no inhibition to p38γ.

Features

A potent and selective inhibitor to p38α and p38β MAPK.

Targets

p38α ^[1]	p38β ^[1]
10 nM	220 nM

In vitro

VX-745 selectively inhibits p38α and p38β MAPK with IC50 of 10 nM and 220 nM, respectively, but not p38γ MAPK and a large panel of other kinases, with IC50 larger than 20 µM. In a human peripheral blood mononuclear cell (PBMC) assay, VX-745 provides IC50 of 56 and 52 nM for IL-1β and TNFα, respectively. VX-745 blocks IL-6 and IL-8 production induced by IL-1 and TNFα, and COX-2 synthesis mediated by LPS and IL-1β. ^[1-3] VX-745 (60 nM-20 µM) inhibits IL-6 and VEGF secretion in bone marrow stromal cells (BMSCs), without affecting their viability. VX-745 also inhibits TNF-α-induced IL-6 secretion in BMSCs. VX-745 inhibits both multiple myeloma (MM) cell proliferation and IL-6 secretion in BMSCs triggered by adherence of MM cells to BMSCs, suggesting that VX-745 can inhibit paracrine multiple myeloma (MM) cell growth in the BM milieu and overcome cell adhesion-related drug resistance. ^[4]

In vivo

VX-745 is effective against adjuvant-induced arthritis (AA) in the rat with ED50 of 5 mg/kg. Histological scores for VX-745 in AA rats are 93% inhibition of bone resorption and 56% inhibition of inflammation. In the classical cartilage-induced arthritis model, VX-745 exhibits a dose-responsive decrease in severity score. ^[1-3] In a type II collagen-induced arthritis (CIA) mice model, VX-745 (2.5, 5, and 10 mg/kg) has 27%, 31%, and 44% improvement in the inflammatory scores, respectively, when compared to vehicle-treated mice. In addition, histological scores show a 32-39% protection of bone and cartilage erosion by VX-745. ^[5]

Protocol

Kinase Assay:^[5]	- Collapse Spectrophotometric coupled-enzyme assay: The IC50 for the inhibition of p38α and p38β homologs are obtained by a spectrophotometric coupled-enzyme assay. A fixed concentration of enzyme (15 nM of p38α or p38β) is incubated with VX-745 in DMSO for 10 min. at 30 °C in 0.1 M HEPES buffer, pH 7.5, containing 10% glycerol, 10 mM MgCl₂, 2.5 mM phosphoenolpyruvate, 200 µM NADH, 150 µg/mL pyruvate kinase, 50 µg/mL lactate dehydrogenase, and 200 µM EGF receptor peptide (KRELVEPLTPSGEAPNQALLR). The reaction is initiated with 100 µM and 70 µM ATP for p38α and p38β assays, respectively. The decrease of absorbance at 340 nm is monitored to follow the rate of the reaction. IC50 is evaluated from the rate data as a function of the inhibitor concentration.
Cell Research:^[4]	- Collapse Cell lines: Human bone marrow stromal cells (BMSCs) and multiple myeloma (MM) cells Concentrations: 60 nM - 20 μM, dissolved in DMSO. Incubation Time: 48 hours Method: BMSCs (5 × 10⁴ cells/well) or MM cells (3 × 10⁴ cells/well) are incubated in 96-well culture plates in the presence or absence of VX-745 for 48 hours at 37 °C. DNA synthesis is measured by [³H]-thymidine ([³H]TdR) uptake. Cells are pulsed with [³H]TdR (0.5 μCi/well [.0185 MBq]) during the last 8 hours of 48-hour cultures. Growth inhibition of both MM cells and BMSCs by VX-745 is also assessed by measuring 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) dye absorbance. (Only for Reference)
Animal Research:^[5]	- Collapse Animal Models: Type II collagen-induced arthritis (CIA) mice model (DBA/1J) Dosages: 2.5, 5, and 10 mg/kg Administration: Oral gavage twice daily (Only for Reference)

References

- Collapse

Solubility (25°C)

In vitro	DMSO	15 mg/mL (34.38 mM)
	Water	Insoluble
	Ethanol	Insoluble
In vivo	Add solvents to the product individually and in order(Data is from Selleck tests instead of citations): 30% PEG400+0.5% Tween80+5% propylene glycol For best results, use promptly after mixing.	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 Download VX-745 SDF

Molecular Weight	436.26
Formula	C₁₉H₉Cl₂F₂N₃OS
CAS No.	209410-46-8
Storage	3 years -20°C powder
Storage	2 years -80°C in solvent
Synonyms	N/A
Smiles	FC1=CC(=C(SC2=NN3C=NC(=O)C(=C3C=C2)C4=C(Cl)C=CC=C4Cl)C=C1)F

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

Dosage

mg/kg

Average weight of animals

Dosing volume per animal

Number of animals

Step 2: Enter the in vivo formulation (Different batches have different solubility ratios, please contact Selleck to provide you with the correct ratio)

% DMSO+ % + % Tween 80+ % ddH₂O

Calculate Reset

Calculation results:

Working concentration： mg/ml；

Method for preparing DMSO master liquid: ： mg drug pre-dissolved in μL DMSO (Master liquid 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 DMSO master liquid, next addμL PEG300， mix and clarify, next addμL Tween 80，mix and clarify, next add μL ddH₂O，mix and clarify.

Note：1.Please make sure the liquid is clear before adding the next solvent.
2.Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such as vortex, ultrasound or hot water bath can be used to aid dissolving.

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 (mg) = Concentration (mM) × Volume (mL) × 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).

The Serial Dilution Calculator Equation

Serial Dilutions
Concertration (start):
Dilution-folds:

Computed Result

C1=C0/X	C1:	LOG(C1):
C2=C1/X	C2:	LOG(C2):
C3=C2/X	C3:	LOG(C3):
C4=C3/X	C4:	LOG(C4):
C5=C4/X	C5:	LOG(C5):
C6=C5/X	C6:	LOG(C6):
C7=C6/X	C7:	LOG(C7):
C8=C7/X	C8:	LOG(C8):

Molecular Weight Calculator

Enter the chemical formula of a compound to calculate its molar mass and elemental composition:

Tip: Chemical formula is case sensitive. C10H16N2O2 c10h16n2o2

Instructions to calculate molar mass (molecular weight) of a chemical compound:

To calculate molar mass of a chemical compound, please enter its chemical formula and click 'Calculate'.

Definitions of molecular mass, molecular weight, molar mass and molar weight:

Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.

Molarity Calculator

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.

Handling Instructions

Tel: +1-832-582-8158 Ext:3

If you have any other enquiries, please leave a message.

p38 MAPK Signaling Pathway Map

p38 MAPK Inhibitors with Unique Features

Pan p38 MAPK Inhibitor

SB202190 (FHPI) : Pan-p38α/β inhibitor, IC50=50 nM/100 nM.
Most Potent p38 MAPK Inhibitor

Skepinone-L ^New : p38α-MAPK, IC50=5 nM.
p38 MAPK Inhibitor in Clinical Trial

PH-797804 : Phase II for Chronic Obstructive Pulmonary Disease (COPD).
Newest p38 MAPK Inhibitor

Skepinone-L ^New : Selective p38α-MAPK inhibitor with IC50 of 5 nM.

Related p38 MAPK Products

Pexmetinib (ARRY-614) ^New

Pexmetinib (ARRY-614) is a potent, orally bioavailable, dual p38 MAPK/Tie-2 inhibitor with IC50 of 4 nM/18 nM in a HEK-293 cell line. Phase 1.
SB239063 ^New

SB239063 is a potent and selective p38 MAPKα/β inhibitor with IC50 of 44 nM, showing no activity against the γ- and δ-kinase isoforms.
Ravoxertinib (GDC-0994) ^New

GDC-0994 is a potent, orally available and highly selective ERK1/2 inhibitor with IC50 of 1.1 nM and 0.3 nM, respectively. Phase 1.
SB203580

SB203580 is a p38 MAPK inhibitor with IC50 of 0.3-0.5 μM in THP-1 cells, 10-fold less sensitive to SAPK3(106T) and SAPK4(106T) and blocks PKB phosphorylation with IC50 of 3-5 μM.

Features:First reported p38 inhibitor.
Doramapimod (BIRB 796)

Doramapimod (BIRB 796) is a pan-p38 MAPK inhibitor with IC50 of 38 nM, 65 nM, 200 nM and 520 nM for p38α/β/γ/δ in cell-free assays, and binds p38α with K_d of 0.1 nM in THP-1 cells, 330-fold greater selectivity versus JNK2, weak inhibition for c-RAF, Fyn and Lck, insignificant inhibition of ERK-1, SYK, IKK2.

Features:The first p38 MAPK inhibitor to be tested in a phase III clinical trial.
SB202190 (FHPI)

SB202190 (FHPI) is a potent p38 MAPK inhibitor targeting p38α/β with IC50 of 50 nM/100 nM in cell-free assays, sometimes used instead of SB 203580 to investigate potential roles for SAPK2a/p38 in vivo.
Ralimetinib (LY2228820)

Ralimetinib (LY2228820) is a novel and potent inhibitor of p38 MAPK with IC50 of 7 nM in a cell-free assay, does not alter p38 MAPK activation. Phase 1/2.
Losmapimod (GW856553X)

Losmapimod (GW856553X) is a selective, potent, and orally active p38 MAPK inhibitor with pK_i of 8.1 and 7.6 for p38α and p38β, respectively. Phase 3.
PH-797804

PH-797804 is a novel pyridinone inhibitor of p38α with IC50 of 26 nM in a cell-free assay; 4-fold more selective versus p38β and does not inhibit JNK2. Phase 2.
VX-702

VX-702 is a highly selective inhibitor of p38α MAPK, 14-fold higher potency against the p38α versus p38β. Phase 2.

Features:Highly selective, orally active inhibitor of p38 MAPK.

Choose Your Country or Region

By Signaling Pathways

By product type

VX-745