Intestinal sensory neuron

**Intestinal sensory neurons** are a heterogeneous group of neurons that detect chemical, mechanical, and microbial stimuli within the gastrointestinal (GI) tract, and play central roles in the regulation of gut motility, secretion, local immune responses, pain, satiety, and homeostasis[1][2][5]. These neurons exist as both intrinsic primary afferent neurons (IPANs) within the enteric nervous system (ENS) and extrinsic sensory neurons, whose cell bodies reside in the dorsal root ganglia or nodose/jugular ganglia and project to the gut[1][2][5][8]. Intestinal sensory neurons form part of a sophisticated neuro-glial-immune-microbial axis, and communicate with enteric glial cells, immune cells, and the gut microbiota, largely via neuropeptide and neurotransmitter signaling (e.g., substance P, CGRP, acetylcholine)[2][1]. These neurons have been implicated in diseases such as inflammatory bowel disease and irritable bowel syndrome, largely due to their role in regulating inflammation, barrier function, and visceral pain[2]. Importantly, "intestinal sensory neuron" refers to a cell type/family, not a singular, well-defined molecular target; as such, it is *not* a canonical drug target (e.g., receptor or enzyme). Instead, their functional roles are being actively investigated to identify tractable molecular targets (such as specific ion channels or receptors selectively expressed in these neurons)[1][2][3][4][5]. **Notes:** - "Intestinal sensory neuron" is not a single, canonical molecule or receptor, but a cell type comprising various subtypes and molecular targets[2][4][5]. - It is not a direct therapeutic target, but subcomponents—such as specific ion channels, GPCRs, or neuropeptide receptors expressed by these neurons—may be targeted therapeutically in the future[1][4][7]. - There is no standard abbreviation, no commonly used singular synonyms, and no established drug interactions unique to "intestinal sensory neuron" as a target. **Relevant references:** - [1]: Sensory neuron regulation of gastrointestinal inflammation [PMCID: PMC5474171] - [2]: Gut sensory neurons as regulators of neuro-immune-microbial axis [PMCID: PMC12219063] - [5]: Enteric nervous system [Wikipedia] - [8]: The Enteric Nervous System (Neuroscience book chapter) - [3]: Harvard overview of gut-brain sensory neurons - [4]: Role of subtypes of GI vagal afferents

Other names

Gut sensory neuronEnteric sensory neuronGastrointestinal sensory neuronIntrinsic primary afferent neuron (IPAN)Extrinsic sensory neuronVagal (afferent) sensory neuronDorsal root ganglia (DRG) sensory neuronNodose/jugular ganglion sensory neuron