IRL-2500

IRL 2500 is a potent Endothelin receptor antagonist. IRL 2500 shows IC50 values of 1.3 and 94 nM for ETB and ETA receptors, respectively. IRL 2500 inhibits ETB receptor-mediated blood pressure increase and renal vascular resistance in rats in vivo[1].

Research Areas >> Cardiovascular Disease

Signaling Pathways >> GPCR/G Protein >> Endothelin Receptor

ETB:1.3 nM (IC50)

ETA:94 nM (IC50)

IRL 2500 (intravenous injection;10 mg/kg) inhibits the initial transient decrease in mean arterial pressure (MAP) induced by the ETB-selective agonist IRL 1620 in rats, IRL 2500 also attenuates the IRL 1620-mediated increase in renal vascular resistance (RVR) in the anesthetized rat[1]. IRL 2500 (intravenous injection;10 mg/kg) pre-reatment significantly reduces the initial vasodepressor response to endothelin-1 (ET-1) and IRL 1620, however, it is not alters the secondary and sustained pressor response to these agonists[2].

[1]. Balwierczak JL, et al. Characterization of a potent and selective endothelin-B receptor antagonist, IRL 2500.J Cardiovasc Pharmacol. 1995;26 Suppl 3:S393-6.

[2]. Webb RL, et al. Effects of the ETB-selective antagonist IRL 2500 in conscious spontaneously hypertensive and Wistar-Kyoto rats.J Cardiovasc Pharmacol. 1995;26 Suppl 3:S389-92.