Mucin glycoprotein layer stabilization

The mucin glycoprotein layer is a structurally organized barrier comprised of heavily glycosylated mucin proteins that assemble into a viscoelastic, gel-like matrix at epithelial surfaces. This layer provides lubrication, regulates permeability to particles and pathogens, and acts as a first line of defense in innate immunity. Structural stabilization depends on non-covalent mucin-mucin interactions, extensive O-linked glycosylation, and environmental factors such as pH and ion concentration. Large mucins (e.g., MUC2, MUC5AC, MUC5B) form the structural backbone of the mucus gel, while membrane-associated mucins (e.g., MUC1) reinforce cell surface protection. Defects or alterations in mucin composition and cross-linking are implicated in a range of diseases from cancer to chronic infection and inflammation

Other names

mucin layermucus gel barriermucin stabilizationmucus stabilization

Agents altering mucin glycosylation, aggregation, or secretion can affect the stabilization of the mucus layer