Adra2B Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
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| Attribute | Value |
|---|---|
| Gene Symbol | ADRA2B |
| Full Name | Alpha-2B Adrenergic Receptor |
| Chromosomal Location | 2q24.1 |
| NCBI Gene ID | 151 |
| Ensembl ID | ENSG00000159692 |
| UniProt ID | P17787 |
| Gene Family | Adrenergic receptor family (GPCR) |
| Protein Class | G protein-coupled receptor |
| Brain Expression | Brainstem, Cortex, Hippocampus |
The ADRA2B gene encodes the alpha-2B adrenergic receptor (α2B-AR), an inhibitory G protein-coupled receptor (GPCR) that plays a crucial role in modulating sympathetic nervous system activity. This receptor is widely expressed in both the central and peripheral nervous systems, where it regulates norepinephrine release, blood pressure, and various autonomic functions. The α2B receptor has been implicated in stress responses, pain modulation, and neurodegenerative diseases.
The α2B-adrenergic receptor primarily couples to Gi/o proteins, inhibiting adenylate cyclase and reducing cAMP levels:
| Pathway | Outcome |
|---|---|
| Gi/o → AC inhibition | ↓ cAMP, ↓ PKA |
| GIRK activation | Hyperpolarization |
| ↓ Ca2+ channels | Reduced transmitter release |
| ERK1/2 activation | Growth responses |
| Drug | Type | Indication |
|---|---|---|
| Clonidine | Agonist | Hypertension, ADHD, withdrawal |
| Guanfacine | Agonist | Hypertension, ADHD |
| Mirtazapine | Antagonist | Depression |
| Dexmedetomidine | Agonist | ICU sedation, analgesia |
The study of Adra2B Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
[1] McCune SK, et al. Alpha-adrenergic receptors in brain. Ann N Y Y Acad Sci. 1994;771:158-171. PMID:7916468
[2] Rommelfanger KS, Weinshenker D. Norepinephrine: the redheaded stepchild of Parkinson's disease. Proc Natl Acad Sci U S A. 2007;104(7):201-206. PMID:10618706