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Alpha-adrenergic agonist. Alpha-adrenergic agonists are a class of sympathomimetic agents that selectively stimulates alpha adrenergic receptors. The alpha-adrenergic receptor has two subclasses α 1 and α 2. Alpha 2 receptors are associated with sympatholytic properties. Alpha-adrenergic agonists have the opposite function of alpha blockers.
The alpha-2 (α2) adrenergic receptor (or adrenoceptor) is a G protein-coupled receptor (GPCR) associated with the G i heterotrimeric G-protein. It consists of three highly homologous subtypes, including α 2A -, α 2B -, and α 2C -adrenergic. Some species other than humans express a fourth α 2D -adrenergic receptor as well. [1]
150 11551 Ensembl ENSG00000150594 ENSMUSG00000033717 UniProt P08913 Q01338 RefSeq (mRNA) NM_000681 NM_007417 RefSeq (protein) NP_000672 NP_031443 Location (UCSC) Chr 10: 111.08 – 111.08 Mb Chr 19: 54.03 – 54.04 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse The alpha-2A adrenergic receptor (α 2A adrenoceptor), also known as ADRA2A, is an α 2 adrenergic receptor, and also ...
There are two main groups of adrenoreceptors, α and β, with 9 subtypes in total: α receptors are subdivided into α 1 (a G q coupled receptor) and α 2 (a G i coupled receptor) [ 7 ] α 1 has 3 subtypes: α 1A, α 1B and α 1D[ a ] α 2 has 3 subtypes: α 2A, α 2B and α 2C. β receptors are subdivided into β 1, β 2 and β 3.
Adrenergic agonist. An adrenergic agonist is a drug that stimulates a response from the adrenergic receptors. The five main categories of adrenergic receptors are: α 1, α 2, β 1, β 2, and β 3, although there are more subtypes, and agonists vary in specificity between these receptors, and may be classified respectively.
Guanfacine. Guanfacine, sold under the brand name Tenex (immediate-release) and Intuniv (extended-release) among others, is an oral alpha-2a agonist medication used to treat attention deficit hyperactivity disorder (ADHD) and high blood pressure. [3][9] Guanfacine is FDA-approved for monotherapy treatment of ADHD, [3] as well as being used for ...
The adenosine A2A receptor has also been shown to play a regulatory role in the adaptive immune system. In this role, it functions similarly to programmed cell death-1 (PD-1) and cytotoxic t-lymphocyte associated protein-4 (CTLA-4) receptors, namely to suppress immunologic response and prevent associated tissue damage.
The adenosine receptors (or P1 receptors[1]) are a class of purinergic G protein-coupled receptors with adenosine as the endogenous ligand. [2] There are four known types of adenosine receptors in humans: A 1, A 2A, A 2B and A 3; each is encoded by a different gene. The adenosine receptors are commonly known for their antagonists caffeine ...