Alpha-7 neuronal nicotinic acetylcholine receptor (α7 nAChR) (α7 nAChR)

The alpha-7 neuronal nicotinic acetylcholine receptor (α7 nAChR) is a homopentameric ligand-gated ion channel predominantly expressed in the brain, specifically within the hippocampus and cerebral cortex [1]. It is distinguished by its high permeability to calcium ions and rapid desensitization, which allows it to effectively modulate the release of other neurotransmitters such as glutamate and GABA [4]. This receptor plays a vital role in cognitive processes, including attention, memory, and sensory gating [3]. In clinical pathology, α7 nAChR dysfunction is strongly associated with the cognitive deficits observed in schizophrenia and Alzheimer's disease [3]. Varenicline, while primarily recognized as an α4β2 partial agonist for smoking cessation, also acts as a full agonist at the α7 receptor, contributing to its potential for cognitive enhancement [2]. Therapeutic targeting of this receptor aims to restore cholinergic signaling and provide neuroprotective effects in various neurodegenerative and psychiatric conditions [4].

Other names

CHRNA7Cholinergic receptor nicotinic alpha 7 subunitAlpha-7 nicotinic receptorNeuronal acetylcholine receptor subunit alpha-7NACHRA7

Full agonism (e.g., varenicline), partial agonism, and positive allosteric modulation [2, 4]