adrenoceptors

L-Albizziin (2-Methoxyidazoxan monohydrochloride) is a highly potent selective antagonist of the alpha 2r adrenergic receptor, with little or no antagonistic effect on imidazoline. It has a significantly higher affinity for the alpha 2D adrenergic receptor (pKd9.7) in guinea pigs than for the alpha 2A adrenergic receptor (pKd8.2) in rabbits.

(±)-Tazifylline is a selective and long-acting antagonist of histamine H1 receptor. Tazifylline shows much lower affinity for H2 receptors, α- and β-adrenoceptors, 5-hydroxytryptamine and muscarinic receptor subtypes.

OPC-28326 is a specific an α2-adrenergic receptor antagonist and acts as a peripheral vasodilator. OPC-28326 inhibits α2A-, α2B- and α2C-adrenoceptors with Ki of 2040, 285, and 55 nM, respectively.

T-0509 is a selective beta 1 receptor agonist that increases inotropy in canine ventricular muscle and selectively down-regulates rat cardiac beta 1-adrenoceptors.

Higenamine hydrochloride (norcoclaurine HCl) has been demonstrated to be a β2 adrenoreceptor agonist. Adrenergic receptors, or adrenoceptors, belong to the class of G protein–coupled receptors, and are the most prominent receptors in the adipose membrane, besides also being expressed in skeletal muscle tissue.

Sarpogrelate hydrochloride (MCI-9042) , a selective 5-HT2 antagonist, has been widely used as an anti-platelet agent for the treatment of PAD. Target: 5-HT2 Recepter Sarpogrelate is a drug which acts as an antagonist at the 5HT2A and 5-HT2B receptors. Sarpogrelate hydrochloride was shown to have the same affinity as ritanserin for 5-HT2A receptors, with a Ki value of 8.39 nM. Sarpogrelate hydrochloride lacked prominent 5-HT1-like, 5-HT3, beta, H1, H2 and M3 antagonist activity and weakly blocked alpha 1-adrenoceptors (pKB = 6.30). (S)-M-1 showed weak affinity for 5-HT1-like receptors (pKB = 6.30), alpha 1- (pKB = 6.80) and beta- (pKB = 6.54) adrenoceptors, while (R)-M-1 was a weak antagonist at histamine H1 receptors (pKB = 6.49). After 12 weeks of sarpogrelate administration, FBF and LBF responses during RH showed significant increases from 13.2 + - 1.7 to 18.1 + - 2.2 mL min per 100 mL tissue (P < 0.01) and from 8.2 + - 0.9 to 14.2 + - 2.1 mL min per 100 mL tissue (P < 0.05), respectively. Sarpogrelate hydrochloride -induced augmentation of FBF and LBF responses to RH was maintained at 24 weeks. Long-term oral administration of sarpogrelate improves vascular function in patients with PAD.

Dexmedetomidine hydrochloride (Precedex) is a potent, selective, orally active α2-adrenoceptor agonist with a Ki value of 1.08 nM. It shows 1620-fold selectivity over α1-adrenoceptors. Dexmedetomidine hydrochloride (Precedex) can protect against sepsis-induced acute lung injury through anti-inflammatory, anti-oxidative, and anti-apoptotic effects.

YS-49 is an activator of PI3K Akt (a downstream target of RhoA).

1. Dihydrolycorine-HCL(DL) shows hypotensive effects, it can block alpha 1-adrenoceptors. 2. Dihydrolycorine is an inhibitors of protein synthesis in eukarytic cells, it halts protein synthesis in eukaryotic cells by inhibiting the peptide bone formation

FG 7142 (LSU-65) also modulates GABA-induced chloride flux at GABAA receptors expressing the α1 subunit (EC50= 137 nM). FG 7142 can increase tyrosine hydroxylation and cause upregulation of β-adrenoceptors in mouse cerebral cortex. FG 7142 , a non-selectively benzodiazepine inverse agonist, has high affinity for the α1 subunit-containing GABAA receptor (Ki=91 nM).

Adenosine A1 receptor activator T62 is an allosteric enhancer of the adenosine A1 receptor, producing antinociception in animal models of acute pain and reducing hypersensitivity in models of inflammatory and nerve-injury pain[1][2][3].

L-745870 trihydrochloride is a highly potent and selective D4 dopamine receptor antagonist.

Epanolol is a potent β-adrenoceptor partial agonist with a greater affinity for β1- than β2-adrenoceptors.

Ko-3290 is a cardioselective antagonist of β-adrenoceptors known for its antilipolytic effects in animals.

(S)-Terazosin is an active S-enantiomer of Terazosin and acts as a potent, high-affinity antagonist of α-adrenoceptors [α1a, α1b, and α1d-adrenoceptors] with Ki values of 3.91 nM, 0.79 nM, and 1.16 nM, respectively.

Ulimorelin is a ghrelin receptor agonist (EC50: 29 nM and a Ki of 16 nM). Ulimorelin is a prokinetic agent and causes vasorelaxation through competitive antagonist action at α1-adrenoceptors.

BU 226 hydrochloride demonstrates affinity for imidazoline (I) receptors, in particular the I2 binding site with a Ki of 1.4 nM. BU 226 hydrochloride showed low (microM) affinity for alpha 2-adrenoceptors.

Doxazosin (UK 33274) is a long-acting α1-adrenoceptor inhibitor widely used to treat benign prostatic hyperplasia and lower urinary tract symptoms.

L748337 is a competitive and potent β3-adrenoceptor antagonist that inhibits the action of β3-, β2-, and β1-adrenoceptors, activates MAPK signaling, promotes phosphorylation of Erk1 2, and inhibits the protective effects of CL316243, and is used in the study of disorders caused by abnormalities of the β3-adrenoceptors.

CH-38083 is a selective and effective alpha-2 adrenoceptors antagonist.

Mezilamine is an antagonist of dopamine. It also blocks presynaptic but stimulating postsynaptic alpha-adrenoceptors.

BFE-55 is derivative of befunolol (a beta-adrenergic partial agonist). BFE-55 interacts with only the high affinity sites in beta-adrenoceptors

BFE-61 is a partial agonist of the beta-adrenoceptors.

Delequamine HCl is a potent and selective alpha 2-adrenoceptor antagonist. Delequamine HCl has a pKi of 9.45 for alpha 2-adrenoceptors in the rat cortex (pA2 in the guinea-pig ileum of 9.72).