Colonic mucosa and enteric nerves

The colonic mucosa and enteric nerves constitute a complex physiological system rather than a single molecular target. The colonic mucosa acts as a selective barrier and is involved in the absorption of water and electrolytes, while the enteric nervous system (ENS) functions as an independent circuit of neurons and glia that regulates gut motility and secretion (StatPearls, 2023). This system is central to the pathophysiology of functional gastrointestinal disorders and inflammatory conditions, where dysregulation of neuro-mucosal signaling leads to symptoms like pain and altered bowel habits (NCBI, 2022). Therapeutic strategies often target specific receptors within this system, such as serotonin or opioid receptors, to manage motility and sensation. Because it encompasses multiple cell types and signaling pathways, it is considered a tissue-level therapeutic site rather than a discrete protein target. Understanding the interaction between the mucosal immune environment and the underlying neural network is crucial for developing treatments for complex diseases like Crohn's disease and ulcerative colitis (PubMed, 2021).

Other names

Enteric nervous systemColonic mucosal barrierIntestinal neuro-mucosal unitGastrointestinal plexus

Pharmacological agents interact with various receptors within this system, such as 5-HT4 agonists for motility, mu-opioid agonists for diarrhea, and guanylate cyclase-C agonists for secretion (StatPearls, 2023). Additionally, aminosalicylates provide anti-inflammatory effects directly on the colonic mucosa to maintain barrier integrity (NCBI, 2022).