Pharmacology and function of nicotinic acetylcholine and P2X receptors in the enteric nervous system

JJ Galligan, RA North - Neurogastroenterology & Motility, 2004 - Wiley Online Library
Neurogastroenterology & Motility, 2004Wiley Online Library
There are many cell surface receptors expressed by neurones in the enteric nervous system
(ENS). Ligand‐gated ion channels are an important class of receptors expressed by enteric
neurones. This review will focus on nicotinic acetylcholine receptors (nAChRs) and P2X
receptors for ATP, as these receptors contribute to fast synaptic transmission in identified
pathways in the ENS. There are multiple subunit proteins that compose nAChRs and P2X
receptors in the nervous system. Functional and pharmacological studies indicate that the …
Abstract
There are many cell surface receptors expressed by neurones in the enteric nervous system (ENS). Ligand‐gated ion channels are an important class of receptors expressed by enteric neurones. This review will focus on nicotinic acetylcholine receptors (nAChRs) and P2X receptors for ATP, as these receptors contribute to fast synaptic transmission in identified pathways in the ENS. There are multiple subunit proteins that compose nAChRs and P2X receptors in the nervous system. Functional and pharmacological studies indicate that the predominant class of nAChR mediating fast synaptic transmission in enteric neurones is composed of α3 and β4 subunits. P2X receptors mediating fast synaptic excitation are predominately P2X2 homomeric receptors.
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