Overview
- Peptide (C)DAGNSSWNGTEAPG, corresponding to amino acid residues 7-20 of rat α2A-adrenoceptor (Accession P22909). Extracellular, N-terminus.
- Western blot analysis of mouse (lanes 1 and 3) and rat (lanes 2 and 4) brain lysates:1, 2. Anti-α2A-Adrenergic Receptor (extracellular) Antibody (#AAR-020), (1:200).
3, 4. Anti-α2A-Adrenergic Receptor (extracellular) Antibody, preincubated with α2A-Adrenergic Receptor (extracellular) Blocking Peptide (#BLP-AR020).
- Expression of α2A-Adrenoreceptor in rat cerebellumImmunohistochemical staining of rat cerebellum free floating frozen section using Anti-α2A-Adrenergic Receptor (extracellular) Antibody (#AAR-020). A. α2A-Adrenoreceptor staining (green) appears in processes of Bergmann glia (white arrows) in the molecular layer (ML). B. Staining of the same section with mouse anti glial fibrillary acidic protein (GFAP) (red), demonstrates expression in both Bergmann glia and in granule layer (GL) astrocytes. C. Merged image of panel A and B demonstrating that α2A-adrenoreceptor expression is restricted to Bergmann glia. DAPI is used as the counterstain (blue).
- Expression of α2A-Adrenoreceptor in rat hypothalamusImmunohistochemical staining of rat ventromedial hypothalamus free floating frozen section using Anti-α2A-Adrenergic Receptor (extracellular) Antibody (#AAR-020), (1:250). A. α2A-Adrenoreceptor staining (green) appears in astrocytic fibers (arrows) originating from the wall of the 3rd ventricle (3rd V). B. DAPI is used as the counterstain (blue). C. Merged image of panels A and B.
- Cell surface detection of α2A-Adrenergic Receptor by indirect flow cytometry in live intact human MEG-01 megakaryocytic leukemia cells:___ Cells.
___ Cells + goat-anti-rabbit-FITC.
___ Cells + Anti-α2A-Adrenergic Receptor (extracellular) Antibody (#AAR-020), (5μg) + goat-anti-rabbit-FITC.
- IUPHAR RECEPTOR DATABASE | ADRENOCEPTORS
- Piascik, M.T. and Perez, D.M. (2001) J. Pharmacol. Exp. Ther. 298, 403.
- Civantos Calzada, B. and Aleixandre de Artinano, A. (2001) Pharmacol. Res. 44, 195.
- Bylund, D.B. (2005) Br. J. Pharmacol. 144, 159.
Adrenergic receptors (also called adrenoceptors) are the receptors for the catecholamines adrenaline and noradrenaline (called epinephrine and norepinephrine in the United States). Adrenaline and noradrenaline play important roles in the control of blood pressure, myocardial contractile rate and force, airway reactivity, and a variety of metabolic and central nervous system functions.
Adrenergic receptors are members of the G-protein coupled receptor (GPCR) superfamily of membrane proteins. They share a common structure of seven putative transmembrane domains, an extracellular N-terminus, and a cytoplasmic C- terminus.
Adrenoceptors are divided into three types: α1, α2 and β-adrenoceptors. Each type is further divided into at least three subtypes: α1A, α1B, α1D, α2A, α2B, α2C, β1, β2, β31,2. Adrenoceptors are expressed in nearly all peripheral tissues and in the central nervous system1,2.
In general, the pharmacological properties of each subtype are quite homogenous across different species. However, this is not the case for the α2A subtype which was first isolated from human platelets3. This subtype shows different pharmacological properties from that of mouse and rat. For this reason, until molecular techniques significantly advanced, it was believed that human α2A and that of mouse and rat (termed α2D) were two different subtypes. Today, it is accepted that these two subtypes are in fact one gene product and is generally termed α2A. One of the main differences between this subtype from the different organisms is its affinity for yohimbine and rauwolscine; rat and mouse α2A displays less affinity compared to human3,4.
Application key:
Species reactivity key:
Anti-α2A-Adrenergic Receptor (extracellular) Antibody (#AAR-020) is a highly specific antibody directed against an epitope of the rat protein. The antibody can be used in western blot and immunohistochemistry applications. It has been designed to recognize α2A-adrenoceptor from mouse, rat, and human samples.
Applications
Citations
- Mouse sample:
Hamlett, E.D. et al. (2020) Neurobiol. Dis. 134, 104616.