Non-specific gastric mucosal proteins and ulcer-base components

Non-specific gastric mucosal proteins and ulcer-base components refers to the collective group of proteins, including albumin, fibrinogen, and globulins, that are exposed at the site of gastric or duodenal mucosal injury (DrugBank, DB00364). These components serve as the primary pharmacological target for cytoprotective agents such as sucralfate and bismuth-containing compounds (StatPearls, NBK551527). In the acidic environment of the stomach (pH < 4), sucralfate undergoes cross-linking to form a viscous, sticky paste that binds to the positively charged proteins within the ulcer base (PubChem, CID 6398). This interaction creates a physical barrier that shields the damaged tissue from the corrosive effects of gastric acid, pepsin, and bile salts, thereby facilitating the natural healing process (PubMed, PMID 3888145). Additionally, this binding may help concentrate endogenous growth factors and stimulate the local production of prostaglandins, which further promotes mucosal repair and integrity (NIH, PMC1533104). This target is clinically significant in the treatment of peptic ulcer disease, gastritis, and the prevention of stress ulcers in critically ill patients.

Other names

Gastric mucosal proteinsUlcer base proteinsNecrotic ulcer tissue proteinsAlbumin and fibrinogen at ulcer sites

Formation of a physical cytoprotective barrier by binding to positively charged proteins (such as albumin and fibrinogen) in the ulcer base, protecting the tissue from gastric acid, pepsin, and bile salts.