Gastrointestinal motility regulators

The term "gastrointestinal motility regulators" refers collectively to a diverse set of molecules, receptors, ion channels, physiological mediators, and cells that control the contraction, relaxation, and coordination of smooth muscle along the gastrointestinal tract[1][2][3][6][9]. These regulators include hormones (e.g., motilin, ghrelin, gastrin, serotonin/5-HT), neurotransmitters (acetylcholine, nitric oxide), receptors (motilin receptor, serotonin receptors, muscarinic receptors), ion channels, enteric neurons, pacemaker cells (interstitial cells of Cajal), immune cells (macrophages), and gut microbiota-derived metabolites (bile acids, short-chain fatty acids, tryptophan metabolites)[1][2][3][5][6][7][8][9]. Drugs that modulate GI motility therefore act on diverse targets, including serotonin receptors (e.g., 5-HT4 agonists such as prucalopride; 5-HT3 antagonists such as alosetron), motilin receptors (erythromycin as a motilin receptor agonist), and more[3][8]. Because this term does not correspond to any single molecular or protein target, but instead describes a functional category spanning many unrelated molecules, it is *not* a valid entry for a canonical target database[1][2][3][6]. Key points: - This entry is generic and does not identify a unique molecule or protein. - Many specific receptors, enzymes, neurons, and ion channels regulate GI motility; each should have its own structured entry if specificity is needed. - Common, well-studied molecular targets in GI motility regulation include **motilin receptor (MLN-R or GPR38)**, **serotonin (5-HT) receptors** (particularly 5-HT3 and 5-HT4 subtypes), **muscarinic acetylcholine receptors**, and **ghrelin receptor (GHS-R1a)**[2][3][8]. - Agents that affect GI motility include prokinetic drugs (enhancing motility, e.g., prucalopride, erythromycin) and antispasmodics (reducing motility, e.g., anticholinergics)[8]. - Novel modulators (e.g., bile acids, SCFAs from microbiota, immune pathways such as macrophage-derived C1q) are areas of active research[1][5]. For a structured database, specify or select a *specific* molecular entity (e.g., "Motilin receptor") rather than the broad category of "gastrointestinal motility regulators."

Other names

gastrointestinal motility modulatorsGI motility regulatorsenteric motility regulatorsagents affecting GI motility