Epithelial surface and extracellular matrix proteins of gastric mucosa

Epithelial surface and extracellular matrix proteins of gastric mucosa refers to a heterogeneous group of proteins, including mucins, collagens, and laminins, that constitute the lining and structural framework of the stomach wall (DrugBank, DB01294). In a pharmacological context, these proteins act as a target for mucosal protectants such as bismuth salts and sucralfate (StatPearls, NBK537076). These agents bind to the proteins exposed at the site of gastric erosions or ulcers, forming a stable, insoluble complex that serves as a physical shield against corrosive gastric acid and proteolytic enzymes like pepsin (PubMed, 7038447). Furthermore, this coating can interfere with the colonization of Helicobacter pylori by masking the adhesion sites the bacteria use to attach to the epithelium (PubMed, 1530702). While not a single molecular entity, this protein group is critical for maintaining gastric integrity and facilitating the healing of the mucosal layer.

Other names

Gastric mucosal proteinsGastric extracellular matrixGastric epithelial surface proteinsGastric mucosal barrier proteins

Mucosal protectants bind to the proteinaceous exudate (such as albumin and fibrinogen) at ulcer sites and the gastric epithelial surface to form a protective physical barrier that prevents damage from gastric acid and pepsin, while also inhibiting the adherence of Helicobacter pylori (DrugBank, DB01294; StatPearls, NBK537076).