Adrenergic Receptors

Oxprenolol is an orally bioavailable β-adrenergic receptor (β-AR) antagonist (Ki = 7.10 nM in a radioligand binding assay using rat heart tissue). It is non-selective and inhibits both β1- and β2-ARs (Kds = 2.09 and 1.35 nM in isolated rat heart and uterus, respectively). Oxprenolol is selective for β-ARs over serotonin (5-HT) receptors in rat sarcolemmal membrane preparations (IC50s = 4.13 and 23,300 nM, respectively), but it binds to 5-HT1A receptors in rat hippocampus and 5-HT1B in rat striatum (Kis = 94.2 and 642 nM, respectively).

Ko-3290 is an antagonist of β-adrenoceptor, with cardioselectivity and antilipolytic effects in animals.

Pargolol hydrochloride is a β adrenergic receptor antagonist.

L-765314 is a potent and selective α1b adrenergic receptor antagonist with Kis of 5.4 nM and 2.0 nM for rat and human α1b adrenergic receptor, respectively.

(R)-Propranolol hydrochloride is a less active enantiomer of the β-adrenoceptor antagonist propranolol. Propranolol is a nonselective β-adrenergic receptor (βAR) antagonist, has high affinity for the β1AR and β2AR with Ki values of 1.8 nM and 0.8 nM, respectively.