SEN 12333, alpha7 nicotinic acetylcholine receptor (nAChR) agonist

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

The Nicotinic Acetylcholine Receptor alpha 7 (nAChR α7) is an important ligand-gated ion channel involved in neurotransmission. It is commonly known by its alternate name α7-nAChR. This receptor plays a critical role in fast synaptic transmission and is activated by the neurotransmitter acetylcholine. The nAChR α7 is a homomeric receptor meaning it is composed entirely of alpha 7 subunits each with a molecular mass of approximately 57 kDa. It is expressed predominantly in the central nervous system especially in the brain but also found in other tissues like the immune system.

Biological function summary

The nAChR α7 facilitates the influx of cations like calcium and sodium upon activation influencing cellular signaling events. As part of the larger family of nicotinic acetylcholine receptors it functions within a pentameric complex structure. The receptor is essential for cognitive processes including attention and memory by modulating neurotransmitter release and plasticity. It also interacts with other neurotransmitter pathways and may play a role in anti-inflammatory processes due to its expression in non-neuronal tissues.

Pathways

The nAChR α7 is involved in the cholinergic signaling pathway and the broader calcium signaling pathway. It contributes to the regulation of intracellular calcium levels which are important for various cellular functions. The receptor works alongside other proteins such as bungarotoxin-sensitive nAChRs and muscarinic acetylcholine receptors (mAChRs) to mediate complex neurotransmitter systems. The interplay between these receptors highlights the receptor's importance in maintaining synaptic function and plasticity.

Research indicates a connection between nAChR α7 and neurodegenerative diseases like Alzheimer’s disease and schizophrenia. The receptor's dysfunction or altered expression has been linked to cognitive deficits associated with these conditions. In Alzheimer's disease the interaction of nAChR α7 with amyloid-beta peptides may contribute to neurotoxicity. Additionally the receptor's association with cytokine release in immune cells suggests a potential role in inflammatory disorders. Its linkage with other neurotransmitter systems such as the involvement of nAChR agonists further demonstrates the receptor's relevance to these neurological and immune-associated diseases.