Gas bubbles at gas–liquid interface in the gastrointestinal tract

Gas bubbles at the gas–liquid interface in the gastrointestinal tract represent a physical target for pharmacological intervention, primarily to alleviate symptoms of bloating and flatulence (StatPearls, 2023). These bubbles are formed during digestion or through the swallowing of air and can become trapped in mucus or liquid, leading to discomfort and distension (PubMed, PMID: 10403580). Drugs like simethicone act directly on this interface by lowering the surface tension of the bubbles (PubChem, CID 6433516). This action causes small, trapped bubbles to coalesce into larger ones, which are then more easily eliminated from the body via belching or flatulence. While not a traditional protein or enzyme target, managing these interfaces is crucial in treating functional gastrointestinal disorders and preparing patients for diagnostic procedures like endoscopy or radiography (NIH, MedlinePlus). The target is unique because the drug is not absorbed systemically but acts locally within the lumen of the gut.

Other names

Intestinal gas bubblesGastric gas bubblesGastrointestinal gas-liquid interfaceMucus-entrapped gas bubblesGI gas bubbles

Reduction of surface tension at the gas-liquid interface, leading to the coalescence of small, trapped gas bubbles into larger ones that are more easily expelled (StatPearls, 2023; PubChem, CID 6433516).