Intestinal smooth muscle contraction

Intestinal smooth muscle contraction," often referred to as **peristalsis**, is not a single molecular target but rather a complex physiological process involving the coordinated activity of multiple cell types and signaling pathways within the gastrointestinal tract. Peristalsis consists of rhythmic contractions and relaxations of circular and longitudinal smooth muscle layers that propel food and waste through the intestines[3][5][7]. This process is regulated by several mechanisms: - **Pacemaker cells** known as interstitial cells of Cajal (ICC) generate slow-wave electrical activity that sets the basic rhythm for contractions[1][4]. - **Smooth muscle cells** contract in response to depolarization triggered by calcium influx through voltage-dependent calcium channels[1][2]. - The **enteric nervous system** coordinates local reflexes; excitatory neurotransmitters like acetylcholine and substance P stimulate contraction above a bolus, while inhibitory neurotransmitters such as nitric oxide and vasoactive intestinal peptide promote relaxation below it[3][5]. Peristaltic function can be modulated by drugs acting on various receptors or ion channels involved in these pathways—such as muscarinic acetylcholine receptors (notably M2/M3 subtypes)[8], L-type calcium channels, or serotonin receptors—but "intestinal smooth muscle contraction/peristalsis" itself does not represent a discrete druggable entity like an enzyme or receptor. Because this entry refers to a broad physiological process rather than a specific molecule or receptor, it is considered incorrect as a canonical therapeutic target. Instead, individual molecular components involved in this process—such as muscarinic acetylcholine receptor M3 or L-type calcium channel—should be specified when discussing drug targets. If you are seeking structured information about specific molecules mediating intestinal peristalsis (e.g., "Muscarinic acetylcholine receptor M3"), please specify which component you wish to focus on.

Other names

PeristalsisGastrointestinal motilityIntestinal peristalsisGut motility