Intestinal mucosa and enteric nervous system (ENS)

The intestinal mucosa and enteric nervous system (ENS) constitute the functional and regulatory infrastructure of the gastrointestinal tract. The mucosa serves as a selective barrier and primary site for nutrient absorption and immune surveillance, while the ENS—a vast network of neurons and glia within the gut wall—autonomously governs motility, secretion, and local blood flow (StatPearls, PMID: 32491414). While these anatomical regions are the sites of action for numerous therapies, they represent complex physiological systems rather than single molecular targets; therapeutic agents actually bind to specific proteins within these tissues, such as serotonin receptors or guanylate cyclase-C (PubMed, PMID: 28803125). Dysregulation of the mucosa or ENS is central to the pathogenesis of inflammatory bowel disease (IBD) and functional gastrointestinal disorders like irritable bowel syndrome (IBS) (NIH, 2022). Consequently, using this broad anatomical description as a 'target' is technically incorrect in a molecular context, as it encompasses thousands of distinct potential drug targets.

Other names

Alimentary mucosaIntrinsic nervous system of the gastrointestinal tractGut-associated lymphoid tissue interfaceGut-brain axis

Pharmacological intervention in these systems typically involves the modulation of specific receptors (e.g., 5-HT, opioid, or nicotinic receptors), inhibition of ion channels (e.g., CFTR or GC-C), or the blockade of leukocyte trafficking via integrin antagonism.