Potassium channel (gastrointestinal)

Potassium channels in the gastrointestinal tract are transmembrane proteins that control the flux of potassium ions across epithelial and smooth muscle cell membranes. They are essential for maintaining membrane potential, regulating iron and water transport, supporting acid secretion by gastric parietal cells, and determining smooth muscle excitability and contractility. Multiple families (voltage-gated, calcium-activated, inwardly rectifying, two-pore domain) are expressed throughout the GI tract. Dysregulation or mutation of GI potassium channels is linked to disorders including acid-peptic diseases, motility disturbances, inflammatory conditions, and GI cancers[1][3][5][8].

Other names

gastrointestinal potassium channelGI K⁺ channelpotassium ion channel (gastrointestinal)GI K⁺ transporter (if including transporters)

Blockade or modulation (activation/inhibition) of potassium channels to alter acid secretion, motility, or secretion/absorption processes; Inhibition of H⁺/K⁺-ATPase to suppress gastric acid secretion[1][3][5]