Neuronal nicotinic acetylcholine receptor α4α6β2 subtype (nAChR α4α6β2)

The neuronal nicotinic acetylcholine receptor α4α6β2 subtype is a pentameric ligand-gated ion channel consisting of α4, α6, and β2 subunits; it is primarily expressed in dopamine neurons in the ventral tegmental area (VTA) and their projections, where it modulates dopamine release in response to acetylcholine and exogenous agents like nicotine. This receptor is crucial for the reinforcing effects of nicotine and plays important roles in motor control and reward processing, making it a target for drugs aimed at smoking cessation and neurodegenerative disease management. Presence and function of this subtype have been confirmed in rodents and humans. Agents targeting the α4α6β2-containing nAChRs are under investigation for their potential therapeutic effect in addiction and diseases such as Parkinson’s disease.

Other names

α4α6β2 nAChRα4/α6/β2 nAChRα4α6β2-containing nicotinic acetylcholine receptorα6-containing nAChR

Agonists (e.g., nicotine, varenicline, cytisine) stimulate ion channel opening, leading to increased dopamine release, especially in the nucleus accumbens and ventral tegmental area. Antagonists/blockers (e.g., α-conotoxin MII) inhibit receptor-mediated dopamine release.