Adenosine A2B Receptor Neurons are neurons expressing the Adenosine A2B receptor, a member of the Adenosine receptor family. These receptor neurons play crucial roles in regulates vasodilation, inflammation, and astrocyte function and are implicated in various neurological and neurodegenerative conditions.
| Property |
Value |
| Receptor Type |
Adenosine A2B |
| Family |
Adenosine |
| Signaling Mechanism |
Gs protein-coupled, activates adenylate cyclase |
| Primary Location |
Wide expression in brain, hippocampus, cortex, basal ganglia |
Adenosine A2B Receptor Neurons are involved in Regulates vasodilation, inflammation, and astrocyte function. These neurons express the Adenosine A2B receptor which gs protein-coupled, activates adenylate cyclase. The receptor's location in wide expression in brain, hippocampus, cortex, basal ganglia allows it to modulate neurotransmission and cellular signaling in key brain regions.
The Adenosine A2B receptor signals through gs protein-coupled, activates adenylate cyclase. This mechanism allows rapid or modulatory responses depending on the cellular context and co-expression of other receptors.
Altered in Alzheimer's disease, involved in neuroinflammation. Understanding the role of these receptor neurons provides insight into potential therapeutic targets for these conditions.
The Adenosine A2B receptor is a target for drug development in:
- Neurological disorders
- Neuropsychiatric conditions
- Neurodegenerative diseases
- G protein-coupled receptor signaling in neurons
- Adenosine receptor pharmacology
- Receptor neurons in neurodegenerative disease
Adenosine A2B receptors exhibit widespread but relatively low expression in the brain under normal physiological conditions. Expression is significantly upregulated under pathological conditions:
- Astrocytes: Highly expressed in reactive astrocytes
- Microglia: Upregulated in neuroinflammation
- Neurons: Low baseline, increased in disease states
- Endothelial cells: Regulates blood-brain barrier function
- Oligodendrocytes: Myelin maintenance and repair
- Gs protein coupling activates adenylate cyclase
- Increases intracellular cAMP levels
- PKA activation leads to phosphorylation of CREB
- Regulates gene transcription
- Can modulate voltage-gated calcium channels
- Affects neurotransmitter release
- Cross-talk with NMDA receptors
- ERK1/2 activation
- Cell survival signaling
- Involved in synaptic plasticity
- A2B activation promotes amyloid-beta clearance
- Modulates neuroinflammation
- Affects tau phosphorylation
- Therapeutic potential being explored
- A2B antagonists may protect dopaminergic neurons
- Modulates glial activation
- Affects alpha-synuclein pathology
- A2B receptors mediate pro-inflammatory responses
- Activation induces cytokine release
- Therapeutic target for neuroinflammatory disorders
- BAY60-6583: Selective A2B agonist
- Regadenoson: A2A selective with some A2B activity
- Used in cardiac stress testing
- PSB603: Selective A2B antagonist
- Alloxazine: Non-selective A2B antagonist
- MRS1754: A2B selective
- Anti-inflammatory therapy
- Cancer immunotherapy (A2B in tumor microenvironment)
- Cardiovascular disease
- Metabolic disorders
- qPCR for A2B mRNA expression
- Western blot for protein levels
- Immunohistochemistry
- cAMP accumulation assays
- Calcium imaging
- ERK phosphorylation
- Fredholm et al., Adenosine receptors (2011)
- Chen et al., A2B adenosine receptor (2013)
- Gao et al., A2B receptors in neuroinflammation (2019)