Azilsartan Medoxomil

For research use only.

Catalog No.S3057 Synonyms: TAK-491

1 publication

Azilsartan Medoxomil Chemical Structure

CAS No. 863031-21-4

Azilsartan Medoxomil (TAK-491) is a potent angiotensin II type 1 (AT1) receptor antagonist, inhibits the RAAS, with an IC50 of 2.6 nM, exhibits >10,000-fold selectivity over AT2.

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  • (B) Dose-response curves of each drug for acute G protein or barr activation derived from the CellKey assay. LOS: Losartan; EXP: EXP3174; TEL: Telmisartan; EPR: Eprosartan; AZI: Azilsartan; OLM: Olmesartan; CAN: Candesartan; VAL: Valsartan; IRB: Irbesartan.

    Sci Rep, 2015, 5:8116.. Azilsartan Medoxomil purchased from Selleck.

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Choose Selective Angiotensin Receptor Inhibitors

Biological Activity

Description Azilsartan Medoxomil (TAK-491) is a potent angiotensin II type 1 (AT1) receptor antagonist, inhibits the RAAS, with an IC50 of 2.6 nM, exhibits >10,000-fold selectivity over AT2.
AT1 receptor [1]
2.6 nM
In vitro

Azilsartan medoxomil is a prodrug, which is rapidly converted to the active moiety, azilsartan (TAK-536), by ester hydrolysis in the gut and plasma during absorption after oral administration. Azilsartan selectively blocks the binding of angiotensin II to the AT1 (angiotensin II type 1) receptors found in the vascular smooth muscle and the adrenal gland, thereby promoting vasodilation and a decrease in the effects of aldosterone. [2] Azilsartan is a highly selective antagonist to the AT1 receptor, with an IC50 of 2.6 nM, exhibiting a >10,000-fold affinity for the AT1 receptor compared with the AT2 receptor, and has not shown affinity for other cardiac receptors or ion channels. The inhibitory effect of Azilsartan persists after washout of the free compound (IC50 value of 7.4 nM). Azilsartan also inhibits the accumulation of angiotensin II -induced inositol 1-phosphate (IP1) in the cell-based assay with an IC50 value of 9.2 nM, and this effect is resistant to washout (IC50 value of 81.3 nM). [1]


Kinase Assay:[1]
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Radioligand Binding:

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 test compounds at room temperature. After 90 min, 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 h. In each step, the plate is briefly and gently shaken on a plate shaker.
Cell Research:[1]
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  • Cell lines: COS-7
  • Concentrations: ~10 nM
  • Incubation Time: 2 h
  • Method: Measurement of Inositol 1-Phosphate Accumulation. Twentyfour hours after transfections with human AT1-expressing plasmids, the cells 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 the test compounds 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 angiotensin II 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 compounds before stimulation with angiotensin II. The accumulation of inositol 1-phosphate (IP1) is measured by using a IP-One Tb kit. The fluorescence resonance energy transfer signal is measured on a plate reader.
    (Only for Reference)

Solubility (25°C)

In vitro DMSO 114 mg/mL (200.51 mM)
Water Insoluble
Ethanol Insoluble

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Chemical Information

Molecular Weight 568.53


CAS No. 863031-21-4
Storage powder
in solvent
Synonyms TAK-491
Smiles CCOC1=NC2=CC=CC(=C2N1CC3=CC=C(C=C3)C4=CC=CC=C4C5=NOC(=O)N5)C(=O)OCC6=C(OC(=O)O6)C

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Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID