Damaged gastric and duodenal mucosal proteins

Damaged gastric and duodenal mucosal proteins refer to the array of proteins, such as albumin and fibrinogen, that are exposed at the site of mucosal erosions or ulcers in the gastrointestinal tract (DrugBank, 2024). These proteins are not a single molecular entity but serve as a collective pharmacological target for cytoprotective agents like sucralfate (StatPearls, 2023). In the acidic environment of the stomach (pH < 4), sucralfate polymerizes into a negatively charged, viscous gel that selectively adheres to these positively charged proteins through electrostatic interactions (PubMed, 3885369). This binding creates a physical barrier, often described as a "chemical bandage," which shields the underlying damaged tissue from further irritation by gastric acid, pepsin, and bile salts. By protecting the ulcer base, this mechanism facilitates the natural healing process and prevents the progression of mucosal damage. While effective for treating peptic ulcer disease and gastritis, the target is non-specific and depends on the presence of tissue injury for drug binding. Consequently, the therapeutic utility is localized to areas of active mucosal damage where these proteins are accessible.

Other names

Exposed ulcerated mucosal proteinsUlcer-site proteinsGastric mucosal proteins

Formation of a protective physical barrier through electrostatic binding to exposed proteins at ulcer sites.