Cell surface and mucosal matrices

Cell surface and mucosal matrices refer to a specialized extracellular environment composed of transmembrane and secreted mucins, trefoil factors, and other glycoproteins that form the protective mucosal barrier. This matrix lines the respiratory, gastrointestinal, and urogenital tracts, providing lubrication, hydration, and a first line of defense against pathogens and mechanical stress (Reactome R-HSA-422475). In disease, components of this matrix are often dysregulated; for instance, MUC1 and MUC16 are overexpressed in various adenocarcinomas and serve as both biomarkers and therapeutic targets for monoclonal antibodies and vaccines. Additionally, alterations in the composition or rheology of the mucosal matrix contribute to chronic inflammatory conditions like cystic fibrosis, asthma, and inflammatory bowel disease. Trefoil factors within the matrix play a critical role in epithelial restitution and wound healing, making them potential targets for regenerative medicine. The complex glycosylation of these matrices also influences cell-cell interactions and signaling pathways, such as the Wnt and EGFR pathways, which are frequently hijacked in malignancy. Therapeutic strategies targeting this matrix include mucolytic agents to clear airway obstructions and targeted immunotherapies to exploit the aberrant glycosylation patterns of cancer-associated mucins.

Other names

Mucosal pellicleMucus layerMucosal barrierGlycocalyx and mucusMucin-rich matricesR-HSA-422475

Mucolytic activity through disruption of disulfide bonds; Monoclonal antibody-mediated cell killing (ADCC/CDC); Vaccine-induced T-cell response against tumor-associated mucins; Enhancement of mucosal protection and epithelial repair.