ELN-441958 is a potent, neutral antagonist of B1 receptor, inhibits the binding of the B1 agonist ligand [3H]DAKD to IMR-90 cells with Ki of 0.26 nM. ELN-441958 is highly selective for B1 over B2 receptors, and >500/ 2000-fold selective for the B1 over μ/δ-opioid receptor.IC50 value: 0.26 nM (Ki)Target: B1 Receptorin vitro: ELN-441958 is a novel small molecule bradykinin B1 receptor antagonist, based on the inhibition of agonist-induced increases in intracellular calcium in native and recombinant cells. ELN-441958 does not inhibit the activation of the human bradykinin B2 receptor at concentrations up to 10 μM, showing that it is highly selective for B1 over B2 receptors. ELN-441958 also displays good selectivity for B1 over other receptors examined in a broad screening panel. It is >500-fold and >2000-fold selective for the B1 receptor over the human μ- and δ-opioid receptor, the most potent off-target activity identified. In IMR-90 cells expressing the native human B1 receptor, ELN-441958 produced a concentration-dependent antagonism of the DAKD-induced calcium mobilization with a KB of 0.12 nM. [1]in vivo: ELN-441958 is essentially completely absorbed and produces high plasma levels after oral administration in rhesus monkeys.ELN-441958 has a moderate clearance and volume of distribution in both species following i.v. administration, consistent with the high metabolic stability in rat, rhesus, and human microsomes. ELN-441958 has high oral exposure and moderate plasma half-lives in rats and rhesus monkeys. The oral availability of ELN441958 in rats was 57%. ELN-441958 dose-dependently reduced carrageenan-induced thermal hyperalgesia in a rhesus monkey tail-withdrawal model, with an ED50 3 mg/kg s.c. [1]

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.