product name Irbesartan
Description: Irbesartan (SR-47436, BMS-186295) is a highly potent and specific angiotensin II type 1 (AT1) receptor antagonist with IC50 of 1.3 nM. Irbesartan is primarily used for the treatment of hypertension. It acts by selectively and competitively blocking the binding of angiotensin II to the angiotensin I receptor. Angiotensin II stimulates aldosterone synthesis and secretion by adrenal cortex, which decreases the excretion of sodium and increases the excretion of potassium. Angiotensin II also acts as a vasoconstrictor in vascular smooth muscle.
References: J Med Chem. 1993 Oct 29;36(22):3371-80.
428.53
Formula
C25H28N6O
CAS No.
138402-11-6
Storage
-20℃ for 3 years in powder form
-80℃ for 2 years in solvent
Solubility (In vitro)
DMSO: 4 mg/mL (9.3 mM)
Water:<1 mg/mL
Ethanol: 3 mg/mL (7.0 mM)
Solubility (In vivo)
30% PEG400+0.5% Tween80+5% Propylene glycol: 30 mg/mL
Synonyms
BMS-186295, SR-47436
other peoduct :
| In Vitro |
In vitro activity: Irbesartan competes with angiotensin II (AII) for binding at the AT1 receptor subtype and antagonizes AII-induced contraction in rabbit aorta ring with IC50 of 4 nM. Irbesartan has no affinity for AT2 receptors. Irbesartan (10 μM) blocks angiotensin II induced increase in αv, β1, β3, and β5 integrins, osteopontin, and α-actinin mRNA and protein levels in rat cardiac fibroblasts, leading to the decrease of cell attachment to extracellular matrix (ECM) proteins. Irbesartan treatment markedly induces the expression of the adipogenic marker gene adipose protein 2 (aP2) in 3T3-L1 cells in a concentration-dependent manner with EC50 of 3.5 μM and 3.3-fold induction at the concentration of 10 μM. Irbesartan (10 μM) markedly induces transcriptional activity of the peroxisome proliferator–activated receptor-γ (PPARγ) by 3.4-fold independent of its AT1 receptor blocking action. Pretreatment with Irbesartan (~10 μM) decreases angiotensin II-induced apoptosis in rat vascular smooth muscle cells by blocking angiotensin II internalization in a concentrationdependent manner. Kinase Assay: Cell Assay: |
|---|---|
| In Vivo | Oral administration of Irbesartan (1 mg/kg) reduces angiotensin II (AII)-induced hypertension, equipotent with losartan in conscious normotensive rats, markedly more active than losartan (10 mg/kg) in normotensive cynomolgus monkeys. Administration of Irbesartan (7 mg/kg/day) significantly prevents skeletal muscle apoptosis and muscle atrophy in rats with monocrotaline-induced congestive heart failure (CHF), which is involved with the decrease of TNFα level and attributed to AT1 receptor blocking. |
| Animal model | Male Sprague-Dawley rats and female cynomolgus monkeys (Macaca fascicularis) injected (iv) with angiotensin II (AII) |
| Formulation & Dosage | Dissolved in water by neutralization with a stoichiometric equivalent of KOH, or dissolved in saline by neutralization with a stoichiometric equivalent of L-arginine; 1 mg/kg; oral gavage |
| References | J Med Chem. 1993 Oct 29;36(22):3371-80. |
