adrenergic receptor


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Related to adrenergic receptor: cholinergic receptor

adrenergic receptor

Etymology: L, ad + ren, kidney; Gk, ergon, work; L, recipere, to receive
a site in a sympathetic effector cell that reacts to adrenergic stimulation. Two types of adrenergic receptors are recognized: alpha-adrenergic, which act in response to sympathomimetic stimuli, and beta-adrenergic, which block sympathomimetic activity. In general, stimulation of alpha receptors is excitatory of the function of the host organ or tissue, and stimulation of the beta receptors is inhibitory.

Adrenergic Receptor

Any of a family of G protein-coupled cell membrane receptors which receive neuronal impulses from postganglionic adrenergic fibres of the sympathetic nervous system, which are divided into:
(1) Alpha receptors, which evoke an excitatory response of smooth muscle cells to catecholamines. Alpha receptors are divided into alpha1 (Gq) and alpha2 (Gi) coupled receptors.
Selective agonist, alpha receptor Phenylephrine
Alpha receptor effects Vasoconstriction, reduced GI tract motility.
(2) Beta receptors, which dampen the response to catecholamines. Beta receptors are divided into beta1, beta2, beta3, which are linked to Gs, and adenylate cyclase, increasing cAMP, which in turn drives cAMP-dependent protein kinase that mediates intracellular events.
Selective agonist, beta receptor Isoprenaline
Beta receptor effects Increased cardiac output, increased renin secretion from juxtaglomerular cells, increased gastric ghrelin secretion, smooth muscle relaxation resulting in bronchodilation, reduced GI motility, relaxation of detrusor muscle of the bladder, lipolysis, glycogenolysis and gluconeogenesis, increased renin secretion, insulin secretion, vasodilation, anabolism and thermogenesis of skeletal muscle.

adrenergic receptor

Neurophysiology Any of a family of cell membrane receptors that receive neuronal impulses from postganglionic adrenergic fibers from the sympathetic nervous sytem, which are divided into α receptors, which results in an excitatory response of smooth muscle cells to catecholamines, and β receptors, which result in an inhibitory response to catecholamines; the GI tract is an exception, in that either α or β receptor stimulation results in relaxation

Adrenergic receptor

There are three families of adrenergic receptors, alpha1, alpha2 and beta, and each family contains three distinct subtypes. Each of the nine subtypes are coded by separate genes, and display specific drug specificities and regulatory properties.
References in periodicals archive ?
Haplotype structure of the beta adrenergic receptor genes in the US Caucasians and African Americans.
In some of the multiple myeloma (MM) cell line models, A2A and beta-2 adrenergic receptor agonists synergized with melphalan, lenalidomide, bortezomib and doxorubicin.
Estimated percentage of patients who are prescribed Diuretics, Beta Blockers (adrenergic receptor antagonists), Alpha Blockers (adrenergic receptor antagonists), Adrenergic Receptor Agonists, Calcium Channel Blockers, ACE Inhibitors, Angiotensin II Receptor Antagonists, Statins, Aldosterone Antagonists, Centrally Acting Antihypertensives, Vasodilators or other (specified).
Krambeck: "After intervention, the greatest improvement in symptom score was seen in the TURP group, followed by laser vaporization, then the drugs, 5 alpha reductase inhibitors and alpha adrenergic receptor blockers.
The paper concludes that in the Beta-Blocker Evaluation of Survival Trial (BEST) adrenergic polymorphism substudy, the norepinephrine lowering and clinical therapeutic responses to bucindolol were strongly influenced by the alpha-2C adrenergic receptor genotype.
5 Percentage of patients receiving who receive Adrenergic Receptor Agonists for the treatment of Hypertension
Preclinical Data on A2A and Beta-2 Adrenergic Receptor Agonist Programs in B-Cell Malignancies To Be Presented
In this study, Gencaro appeared to produce enhanced clinical outcomes in the 47% of patients who were homozygous for the amino acid position 389 arginine polymorphism of the beta-1 adrenergic receptor, a variant with higher functional activity and higher affinity for norepinephrine, which the Company believes is the most favorable genotype for a positive response to Gencaro.
Estimated percentage of patients prescribed the following adrenergic receptor agonists, for the treatment of Hypertension: Options: clonidine (e.
ADRENERGIC RECEPTOR MEDIATED SUPPRESSION OF SEIZURES: [[alpha].
The beta1-adrenergic receptor 389 Arginine/Glycine polymorphism is known to be influenced by racial differences that vary in European versus American populations, and other adrenergic receptor polymorphisms that could influence beta-blocker response also exhibit racial differences in allele frequencies.

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