Catalog No.S3046 Synonyms: TAK-536

For research use only.

Azilsartan (TAK-536) is an angiotensin II type 1 (AT1) receptor antagonist with IC50 of 2.6 nM.

Azilsartan Chemical Structure

CAS No. 147403-03-0

Selleck's Azilsartan has been cited by 2 Publications

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Choose Selective Angiotensin Receptor Inhibitors

Biological Activity

Description Azilsartan (TAK-536) is an angiotensin II type 1 (AT1) receptor antagonist with IC50 of 2.6 nM.
Features A potent, orally active and specific AII receptor antagonist.
AT1 receptor [1]
2.6 nM
In vitro

Azilsartan inhibits the specific binding of 125I-Sar1-Ile8-AII to human angiotensin type 1 receptors. Azilsartan also inhibits the accumulation of AII-induced inositol 1-phosphate (IP1) in the cell-based assay with an IC50 value of 9.2 nM. In isolated rabbit aortic strips, Azilsartan reduces the maximal contractile response to AII with a pD'2 value of 9.9. The inhibitory effects of Azilsartan on contractile responses induced by AII persists after the strips are washed. [1] Azilsartan suppresses the increase in plasma glucose level in the oral glucose tolerance test (OGTT) without significant change in insulin concentration and improved insulin sensitivity. In skeletal muscle, Azilsartan decreases the expression of TNF-α at doses of 0.001%. In adipose tissue, Azilsartan reduces TNF-α expression but increases the expression of adiponectin, PPARγ, C/EBα, and aP2. [2] In cultured 3T3-L1 preadipocytes, Azilsartan enhances adipogenesis and exertes greater effects than valsartan on expression of genes encoding peroxisome proliferator-activated receptor-α (PPARα), PPARδ, leptin, adipsin, and adiponectin. Azilsartan also potently inhibits vascular cell proliferation in the absence of exogenously supplemented angiotensin II. [3]

In vivo In Koletsky rats, Azilsartan treatment lowers blood pressure, basal plasma insulin concentration and the homeostasis model assessment of insulin resistance index, and inhibited over-increase of plasma glucose and insulin concentrations during oral glucose tolerance test. Azilsartan downregulates 11β-hydroxysteroid dehydrogenase type 1 expression. [4]

Protocol (from reference)

Kinase Assay:[1]
  • Radioligand binding studies on human AT1 receptors:

    A radioligand binding assay is performed by using human AT1 receptor-coated microplates containing 4.4 to 6.2 fmol of receptors/well (10 μg of membrane protein/well). Membrane-coated wells are incubated with 45 μL of assay buffer (50 mM Tris-HCl, 5 mM MgCl2, 1 mM EDTA, and 0.005% CHAPS, pH 7.4) containing various concentrations of Azilsartan at room temperature. After 90 minutes, 5 μL of 125I-Sar1-Ile8-AII (final concentration 0.6 nM) dissolved in assay buffer is added to the wells, and the plate is incubated for 5 hours. In each step, the plate is briefly and gently shaken on a plate shaker. In washout experiments, the membranes are incubated with Azilsartan for 90 minutes, then immediately washed twice with 200 μL/well of assay buffer to remove unbound compounds, and further incubated for 5 hours with 125I-Sar1-Ile8-AII. Membrane-bound radioactivity is counted using a TopCount Microplate Scintillation and Luminescence Counter. In the experiments to estimate the dissociation rate of Azilsartan from AT1 receptors, membranes are incubated for 90 minutes with Azilsartan at a concentration of 30 nM for Azilsartan. Azilsartan inhibits the specific binding of 125I-Sar1-Ile8-AII to human AT1 by approximately 90%. The membranes are then immediately washed twice with 200 μL/well of assay buffer and further incubated with 125I-Sar1-Ile8-AII for 240 minutes. Membrane-bound radioactivity is counted using the TopCount Microplate Scintillation and Luminescence Counterat 30 minutes, 60 minutes, 90 minutes, 120 minutes, 150 minutes, 180 minutes, or 240 minutes. Nonspecific binding of 125I-Sar1-Ile8-AII is estimated in the presence of 10 μM unlabeled AII. Unlabeled AII is added again after washout for the washout experiment. Specific binding is defined as total binding minus nonspecific binding.

Cell Research:[1]
  • Cell lines: COS-7 cells expressing human AT1 receptors
  • Concentrations: 0 μM -1 μM
  • Incubation Time: 2 hours
  • Method: Twenty-four hours after transfections, the COS-7 cells expressing human AT1 receptors are starved by changing the culture medium to starvation buffer (1 mM CaCl2, 0.5 mM MgCl2, 4.2 mM KCl, 146 mM NaCl, 5.5 mM glucose, and 10 mM HEPES, pH 7.3). Then, 5 μL/well of Azilsartan dissolved in starvation buffer is added to the cells at the indicated concentrations, and they are pretreated for the indicated times. Two hours after starvation, LiCl is added to a final concentration of 50 mM with or without AII 10 nM, and the cells are further incubated for the indicated times at 37°C. In washout experiments, the cells are washed once with 100 μL/well of starvation buffer to remove unbound Azilsartan before stimulation with AII. The accumulation of inositol 1-phosphate (IP1) is measured by using an IP-One Tb kit. The fluorescence resonance energy transfer signal is measured on a plate reader.
  • (Only for Reference)
Animal Research:[4]
  • Animal Models: Male Wistar-Kyoto (WKY) rats, obese Koletsky (fak/fak) rats
  • Dosages: 1 mg/kg, 2 mg/kg and 3 mg/kg
  • Administration: Oral gavage
  • (Only for Reference)

Solubility (25°C)

In vitro

DMSO 91 mg/mL
(199.36 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

Molecular Weight 456.45


CAS No. 147403-03-0
Storage 3 years -20°C powder
2 years -80°C in solvent
Smiles CCOC1=NC2=CC=CC(=C2N1CC3=CC=C(C=C3)C4=CC=CC=C4C5=NOC(=O)N5)C(=O)O

In vivo Formulation Calculator (Clear solution)

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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.
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Molarity Calculator

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Clinical Trial Information

NCT Number Recruitment Interventions Conditions Sponsor/Collaborators Start Date Phases
NCT04668157 Recruiting Drug: TAK-536 Hypertension Takeda May 17 2021 Phase 3
NCT03434977 Completed Drug: TAK-536 Healthy Volunteers Takeda February 14 2018 Phase 1
NCT03042299 Completed Drug: TAK-536 Japanese Healthy Adult Male Participants Takeda February 10 2017 Phase 1
NCT02791438 Completed Drug: Azilsartan|Drug: Placebo Pediatric Hypertension Takeda August 18 2016 Phase 3
NCT02541669 Completed Drug: TAK-491|Drug: TAK-491 placebo Healthy Volunteer Takeda November 20 2015 Phase 1
NCT02451150 Completed Drug: Azilsartan Pediatric Hypertension Takeda August 2015 Phase 3

(data from, updated on 2021-09-06)

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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.

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