Gastroesophageal and gastric mucosal surface and gastric acid

The gastroesophageal and gastric mucosal surface, along with gastric acid, represent the physiological environment of the upper digestive tract. Gastric acid, primarily hydrochloric acid secreted by parietal cells, is essential for protein denaturation and the activation of pepsinogen into pepsin (StatPearls, 2023). The mucosal surface acts as a protective barrier, employing a mucus-bicarbonate layer to shield the epithelium from the corrosive effects of acid and digestive enzymes (NIH, 2022). When the balance between these aggressive and protective factors is lost, conditions such as gastroesophageal reflux disease (GERD) and peptic ulcers develop. Therapeutic strategies involve the direct neutralization of gastric acid by antacids or the reinforcement of the mucosal barrier using cytoprotective agents like sucralfate (PubChem, 2024). These interventions aim to alleviate symptoms and promote tissue healing by altering the chemical environment or providing physical protection to the gastric lining.

Other names

Gastric acidGastric mucosal barrierStomach acidGastric juiceGastroesophageal mucosaGastroduodenal mucosal surface

Chemical neutralization of hydrochloric acid; formation of a protective physical barrier over ulcerated or inflamed mucosa; stimulation of endogenous mucosal defense mechanisms.