Intestinal peristalsis pathway

The "intestinal peristalsis pathway" refers to the coordinated, wave-like muscular contractions of the intestinal wall that propel luminal contents through the gastrointestinal tract[5][7]. This process is regulated by the **enteric nervous system** (ENS), especially the myenteric plexus, in conjunction with smooth muscle cells, interstitial cells of Cajal (the pacemakers), and influenced by various neurotransmitters (such as acetylcholine, serotonin (5-HT), and substance P)[7][1]. Peristalsis is not a molecular entity but involves: - **Neurotransmitters**: including serotonin (5-HT, especially via 5-HT3 and 5-HT4 receptors), acetylcholine, and substance P[1][7]. - **Ion channels**: L-type calcium channels (essential for excitation-contraction coupling in smooth muscle)[7]. - **Receptors**: serotonin receptors (5-HT3, 5-HT4, among others), muscarinic acetylcholine receptors[7]. - **Other molecular components**: chloride channels involved in fluid transport (CFTR, Ca2+-activated Cl- channels), and Na+/K+ ATPase contribute to ionic gradients necessary for motility and secretion[1]. Key roles of the pathway include advancing intestinal contents, mixing chyme, and regulating nutrient absorption and bowel movements[5]. Dysregulation leads to human disease, such as chronic constipation and irritable bowel syndrome[1]. Macrophage-derived molecules like complement C1q have also been described as modulators of gut motility via interactions with enteric neurons[2]. Many drugs affect molecules within these pathways rather than the pathway as a whole. For example: - **5-HT4 receptor agonists** (e.g., prucalopride) enhance peristalsis by stimulating enteric neurons. - **Anticholinergics** inhibit peristalsis by blocking acetylcholine action. **Safety concerns** and biomarkers are defined only in the context of specific molecular targets (not the pathway itself). In summary: "Intestinal peristalsis pathway" is *not* a single, actionable molecular target but a descriptor for a complex, multi-component physiological process regulating gut motility[5][7]. Individual protein targets within this pathway can be considered drug targets, but the pathway as a whole is not a canonical molecular entity.

Other names

Gut motility pathwayPeristaltic reflexIntestinal motility pathway