Name: Zileuton
Brand: Selleck Chemicals
SKU: S1443
Availability: InStock
Rating: 5 (10 reviews)

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Quality Control

Batch: Purity: 99.98%

99.98

Related Targets	Dehydrogenase HSP Transferase P450 (e.g. CYP17) PDE phosphatase PPAR Vitamin Carbohydrate Metabolism Mitochondrial Metabolism
Other Lipoxygenase Inhibitors	ML355 PD146176 Malotilate AKBA (3-O-Acetyl-11-keto-β-boswellic acid) Demethylnobiletin Esculetin Nordihydroguaiaretic acid (NDGA) SR 2640 hydrochloride FPL 62064 ML351

Cell Culture, Treatment & Working Concentration

Cell Lines	Assay Type	Concentration	Incubation Time	Activity Description	PMID
RBI-1	Function assay			In vitro inhibition of 5-lipoxygenase (5-lo) from the 20000 g supernatant of RBI-1 cells, IC50=0.6μM	2066989
RBL-1	Function assay			Inhibitory concentration against 5-lipoxygenase in rat RBL-1 cells, IC50=3.2μM	8831759
basophilic leukemia cells	Function assay			Inhibitory activity against 5-lipoxygenase obtained from rat basophilic leukemia cells, IC50=0.5μM	9484493
RBL-2H3	Function assay			Inhibition of 5-lipoxygenase mediated conversion of [14C]arachidonic acid to leukotrienes in RBL-2H3 cells, IC50=0.804μM	9599246
granulocytes-type cells	Function assay			The compound was evaluated for its inhibitory activity against 5-lipoxygenase using granulocytes-type cells, IC50=2.9μM	11859001
polymorphonuclear cells	Antileukotrienic assay			Antileukotrienic activity in rat polymorphonuclear cells assessed as inhibition of LTB4 biosynthesis, IC50=0.01μM	17448575
MC9	Function assay			Inhibition of LTB4 production in mouse MC9 cells, IC50=0.55μM	18498150
MC9	Function assay			Inhibition of leukotrienes production in mouse MC9 cells	18498150
PMNL	Function assay		15 mins	Inhibition of 5-lipoxygenase in cell free S100 freshly isolated human PMNL cells assessed as inhibition of A23187-stimulated 5-LO product formation preincubated for 15 mins measured after 10 mins by HPLC analysis, IC50=0.5μM	22551629
BMM	Function assay		30 mins	Inhibition of 5-LO in mouse BMM cells assessed as formation of LTC4 after 30 mins by enzyme immunoassay, IC50=0.19μM	26432605
A549	Function assay		15 mins	Inhibition of mPGES-1 isolated from microsomes of interleukin-1 beta-stimulated human A549 cells using PGH2 as substrate preincubated for 15 mins followed by substrate addition measured after 1 min by RP-HPLC analysis, IC50=0.6μM	30053720
RAW264.7	Function assay	5 uM	24 hrs	Inhibition of LPS/IFNgamma-stimulated lipid peroxidation in mouse RAW264.7 cells at 5 uM after 24 hrs by BODIPY 581/591 C11-staining based FACS assay	30964295
RAW264.7	Function assay	5 uM	48 hrs	Protection against LPS-induced cell death in mouse RAW264.7 cells assessed as increase in cell viability at 5 uM measured after 48 hrs by MTS assay relative to control	30964295
PMNL	Function assay		5 mins	Inhibition of 5-LO in human PMNL cells assessed as reduction in leukotriene formation preincubated for 5 mins followed by thapsigargin stimulation measured after 15 mins by RP-HPLC analysis, IC50=2.31μM	31260889
HEK293	Function assay	1 uM	5 mins	Inhibition of human 5-LO transfected in HEK293 cells coexpressing FLAP assessed as reduction in leukotriene formation at 1 uM using arachidonic acid as substrate preincubated for 5 mins followed by calcium ionophore A23187/arachidonic acid addition and me	31260889
PMNL	Function assay	1 uM	5 mins	Inhibition of 5-LO in human PMNL cells assessed as reduction in leukotriene formation at 1 uM preincubated for 5 mins followed by thapsigargin stimulation measured after 15 mins by RP-HPLC analysis relative to control	31260889
BL21 (DE3)	Function assay		10 mins	Inhibition of recombinant human 5-lipoxygenase expressed in Escherichia coli BL21 (DE3) cells using arachidonic acid as substrate preincubated for 10 mins followed by susbtrate addition and measured after 10 mins by reverse phase HPLC method, IC50=0.5μM	31465225
insect cells	Function assay		5 mins	Inhibition of human recombinant 5-LOX expressed in insect cells assessed as decrease in production of 5-HPETE and 5-HETE using arachidonic acid as substrate preincubated for 5 mins followed by substrate addition measured after 20 mins in dark by ferric io, IC50=23.9μM	31774676
RBL-2H3	Function assay			Inhibition of 5-Lipoxygenase of rat basophilic leukemia cells, IC50=0.14μM	ChEMBL
Sf21	Function assay		4 mins	Inhibition of rat 5-LOX expressed in Sf21 insect cells preincubated for 4 mins followed by AA substrate addition and measured after 4 mins by FOX assay, IC50=0.18μM	ChEMBL
RBL-2H3	Function assay			In vitro inhibition of 5-lipoxygenase in RBL-2H3 (Rat basophilic leukemia) cells, IC50=1.25μM	ChEMBL
Click to View More Cell Line Experimental Data

Solubility

In vitro
Batch:

DMSO : 47 mg/mL (198.9 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 47 mg/mL

Water : Insoluble

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
Mass value Mass unit	Concentration value Concentration unit	Volume value Volume unit	Molecular weight (g/mol)

Dilution Calculator Molecular Weight Calculator

In vivo batch selection In vivo Batch:
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 95% of 20%Hydroxypropyl-β-cyclodextrin Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	6.250mg/ml (26.45mM)	Taking the 1 mL working solution as an example, add 50 μL of 125 mg/ml clear DMSO stock solution to 950 μL of 20%Hydroxypropyl-β-cyclodextrin and mix evenly. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	1.000mg/ml (4.23mM)	Taking the 1 mL working solution as an example, add 50 μL of 20 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.
Clear solution	5%DMSO 1 40%PEG300 2 5%Tween80 3 50%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	4.500mg/ml (19.04mM)	Taking the 1 mL working solution as an example, add 50 μL of 90 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.650mg/ml (2.75mM)	Taking the 1 mL working solution as an example, add 50 μL of 13 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.

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: g

Dosing volume per animal: μL

Number of animals:

Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO

%

% Tween 80

% ddH₂O

% DMSO

+

%

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 μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH₂O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, 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.

Chemical Information, Storage & Stability

Molecular Weight	236.29	Formula	C₁₁H₁₂N₂O₂S	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	111406-87-2	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	A-64077			Smiles	CC(C1=CC2=CC=CC=C2S1)N(C(=O)N)O

Mechanism of Action

Targets/IC₅₀/Ki	Ferroptosis 5-lipoxygenase
In vitro	Zileuton suppresses PG biosynthesis by interference with arachidonic acid (AA) release in macrophages. This compound significantly reduces PGE2 and 6-keto prostaglandin F1α (PGF1α) levels in activated mouse peritoneal macrophages and in J774 macrophages. It inhibits PGE2 production in LPS-stimulated human whole blood and suppresses PGE2 and 6-keto PGF1α pleural levels in rat carrageenan-induced pleurisy.
In vivo	Zileuton significantly reduces macroscopic damage score after four weeks of treatment in rats. This compound administration significantly increases the intracolonic release of both thromboxane B2 at week 1 and prostaglandin E2 at weeks 2 and 4 in rats. It reduces the spinal cord inflammation and tissue injury, neutrophil infiltration, TNF-alpha, COX-2 and pERK1/2 expression, PGE(2) and LTB(4) production, and apoptosis in mice. This chemical significantly improves the recovery of limb function over 10 days in mice. It administrated before I/R significantly reduces the degree of renal dysfunction (urea, creatinine) and injury (AST, histology) in 5-lipoxygenase knockout mice. This compound reduces the expression of ICAM-1 and the associated PMN infiltration caused by I/R of the mouse kidney in 5-lipoxygenase knockout mice. It inhibits LTB(4) production in the peritonitis model more effectively than the LTA(4)H inhibitor, but the influx of neutrophils into the peritoneum after 1 and 2 hours is significantly higher in this compound- versus JNJ-26993135-treated mice.
References	[1] https://pubmed.ncbi.nlm.nih.gov/20880396/ [2] https://pubmed.ncbi.nlm.nih.gov/8984030/ [3] https://pubmed.ncbi.nlm.nih.gov/18059327/ [4] https://pubmed.ncbi.nlm.nih.gov/15266012/ [5] https://pubmed.ncbi.nlm.nih.gov/17371808/ [6] https://pubmed.ncbi.nlm.nih.gov/26235588/

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2024-05-22)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT01136941	Completed	Sickle Cell Disease	Children''s Hospital Medical Center Cincinnati	September 2010	Phase 1
NCT01130688	Terminated	Chronic Myelogenous Leukemia	University of Massachusetts Worcester	January 2010	Phase 1

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Zileuton Lipoxygenase inhibitor

Chemical Structure

Molecular Weight: 236.29